This document summarizes simulation results that compare the actuation voltages of uniform and non-uniform cantilever RF MEMS series switches. Various geometric configurations and material properties were modeled using COMSOL Multiphysics software. It was observed that non-uniform switches supported on three bars had lower spring constants and required actuation voltages as low as 12.9V compared to uniform switches which required at least 17.2V. Specifically, a non-uniform switch using mica as the dielectric material with a dielectric constant of 9 and a bottom electrode length of 95um achieved the lowest voltage. The document concludes that non-uniform switch designs can reduce actuation voltage requirements by approximately 5V compared to uniform switches of similar configurations.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Computational Engineering Research (IJCER) ijceronline
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology
A Review of Multi Resonant Slotted Micro Strip Patch Antenna (MPA) for IMT, W...IJEEE
In this paper, a stacked multi resonant slotted micro strip patch antenna (MPA) has been proposed which is suitable to be used for GSM, WLAN standard and WiMAX applications. The antenna has been designed using substrate of FR4 material. In the designed stacked antenna, substrates having different thickness has been used. The bottom stack of designed antenna has a radiating patch of circular shape and the patch on the upper stack has rectangular shape and is flexible in nature. The antenna has a feed line which is connected to circular patch to feed power to the antenna. The feed line has to be of suitable width to match the antenna impedance with port impedance of 50 ohms. The designed antenna has a defected ground structure in order to improve the antenna performance. The antenna performance has been measured in terms of antenna parameters such as impedance bandwidth (GHz), Return loss (dB), antenna impedance (ohms), VSWR and Directivity (dBi). The designed antenna results have been simulated in CST Microwave Studio 2010. The practically designed antenna has been tested successfully by using Network analyzer E5071C. It has been observed that the practical results closely match with theoretical results.
Very-Low-Cost Copper-Wire Antenna for 2.4-GHz WLAN OperationSaou-Wen Su
A very-low-cost copper-wire antenna, easily fabricated by bending a single 70-mm-long copper wire two times, for WLAN operation in the 2.4 GHz band (2400-2484 MHz) is presented. The antenna has a very simple structure and is easily fed by using a 50- mini-coaxial cable. A prototype of the proposed antenna with the overall dimensions 40 mm x 5 mm is constructed and tested.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
5G Fixed Beam Switching on Microstrip Patch Antenna IJECEIAES
5G technology is using millimeter-wave band to improve the wireless communication system. However, narrow transmitter and receiver beams have caused the beam coverage area to be limited. Due to propagation limitations of mm wave band, beam forming technology with multi-beam based communication system, has been focused to overcome the problem. In this letter, a fixed beam switching method is introduced. By changing the switches, four different configurations of patch array antennas are designed to investigate their performances in terms of radiation patterns, beam forming angle, gain, half-power bandwidth and impedance bandwidth at 28 GHz operating frequency for 5G application. Mircostrip antenna is preferred due to its low profile, easy in feeding and array configurations. Three different beam directions had been formed at -15°, 0°, and 15° with half-power bandwidth of range 45˚ to 50˚.
Design of Dual Frequency Antenna For Global Positioning systemijsrd.com
In recent years low profile, light weight antennas are preferred for the applications which need mobility. In this research the polygonal-shape Microstrip Single Patch Antenna has been designed for GPS dual resonant frequencies (GPS L1 1.575 GHz & L5 1.176 GHz band). Simulated results for main parameters such as return loss, bandwidth, radiation patterns and gains are also discussed herein. The Designing, Simulation & Optimization of this antenna is done in ADS Software. Result of the simulation shows at 1.575 GHz and 1.176 GHz, the antenna has return loss at -20.862 dB and -14.162 dB respectively. .
International Journal of Computational Engineering Research(IJCER) ijceronline
nternational Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
International Journal of Computational Engineering Research (IJCER) ijceronline
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology
A Review of Multi Resonant Slotted Micro Strip Patch Antenna (MPA) for IMT, W...IJEEE
In this paper, a stacked multi resonant slotted micro strip patch antenna (MPA) has been proposed which is suitable to be used for GSM, WLAN standard and WiMAX applications. The antenna has been designed using substrate of FR4 material. In the designed stacked antenna, substrates having different thickness has been used. The bottom stack of designed antenna has a radiating patch of circular shape and the patch on the upper stack has rectangular shape and is flexible in nature. The antenna has a feed line which is connected to circular patch to feed power to the antenna. The feed line has to be of suitable width to match the antenna impedance with port impedance of 50 ohms. The designed antenna has a defected ground structure in order to improve the antenna performance. The antenna performance has been measured in terms of antenna parameters such as impedance bandwidth (GHz), Return loss (dB), antenna impedance (ohms), VSWR and Directivity (dBi). The designed antenna results have been simulated in CST Microwave Studio 2010. The practically designed antenna has been tested successfully by using Network analyzer E5071C. It has been observed that the practical results closely match with theoretical results.
Very-Low-Cost Copper-Wire Antenna for 2.4-GHz WLAN OperationSaou-Wen Su
A very-low-cost copper-wire antenna, easily fabricated by bending a single 70-mm-long copper wire two times, for WLAN operation in the 2.4 GHz band (2400-2484 MHz) is presented. The antenna has a very simple structure and is easily fed by using a 50- mini-coaxial cable. A prototype of the proposed antenna with the overall dimensions 40 mm x 5 mm is constructed and tested.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
5G Fixed Beam Switching on Microstrip Patch Antenna IJECEIAES
5G technology is using millimeter-wave band to improve the wireless communication system. However, narrow transmitter and receiver beams have caused the beam coverage area to be limited. Due to propagation limitations of mm wave band, beam forming technology with multi-beam based communication system, has been focused to overcome the problem. In this letter, a fixed beam switching method is introduced. By changing the switches, four different configurations of patch array antennas are designed to investigate their performances in terms of radiation patterns, beam forming angle, gain, half-power bandwidth and impedance bandwidth at 28 GHz operating frequency for 5G application. Mircostrip antenna is preferred due to its low profile, easy in feeding and array configurations. Three different beam directions had been formed at -15°, 0°, and 15° with half-power bandwidth of range 45˚ to 50˚.
Design of Dual Frequency Antenna For Global Positioning systemijsrd.com
In recent years low profile, light weight antennas are preferred for the applications which need mobility. In this research the polygonal-shape Microstrip Single Patch Antenna has been designed for GPS dual resonant frequencies (GPS L1 1.575 GHz & L5 1.176 GHz band). Simulated results for main parameters such as return loss, bandwidth, radiation patterns and gains are also discussed herein. The Designing, Simulation & Optimization of this antenna is done in ADS Software. Result of the simulation shows at 1.575 GHz and 1.176 GHz, the antenna has return loss at -20.862 dB and -14.162 dB respectively. .
International Journal of Computational Engineering Research(IJCER) ijceronline
nternational Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
Performance Evaluation for Production of 5000kgHydraulic JackIOSR Journals
The report submitted presents detailed performance evaluation analysis for production of 5tonne
hydraulic jack. The main task is to produce it using two approaches namely conversional and reverse
engineering. Conversional design team were able to design the jack with all the necessary tolerance and limits,
those involve design calculations, producing standard drawing and cost analysis on each part involve. While
reverse engineering team were able to produce the jack through reverse engineering procedures and approach,
this involve selection of materials needed to produce the parts with our machines in the workshop, test analysis
for each component, assembling and testing to ensure effective performance
Documentaries use for the design of learning activitiesIOSR Journals
Abstract: Documentaries used in the training field constitute the rich sources of information. They have the
advantage to associate the elements of knowledge with events which request the episodic memory of the
learner.Thus, these documentaries increase the probability of retention of knowledge they convey. However, the
logical sequence of knowledge does not guarantee an efficient construction which can be mobilized in situations
of action. In this paper, we seek how to benefit from the potential of these documentaries to promote the
construction and mobilization of knowledge by the learner in an elearning platform. Particularly, we propose a
method allowing segmenting the contents of a documentary to design learning activities. Based on a case study
related to the field of mechatronics, we begin by segmenting the content of a documentary in terms of elements
of knowledge (facts, concepts, procedures, and rules) then we connect with each of these problems they seek to
find answers. We reorganize learning activities to promote the acquisition and mobilization of knowledge by the
learner. We conclude by proposing a pedagogical scenario to implement these activities in elearning platform.
Keywords: LMS, IMS-LD, Documentary, Design, Elearning
Stress Analysis of Automotive Chassis with Various ThicknessesIOSR Journals
Abstract : This paper presents, stress analysis of a ladder type low loader truck chassis structure consisting of
C-beams design for application of 7.5 tonne was performed by using FEM. The commercial finite element
package CATIA version 5 was used for the solution of the problem. To reduce the expenses of the chassis of the
trucks, the chassis structure design should be changed or the thickness should be decreased. Also determination
of the stresses of a truck chassis before manufacturing is important due to the design improvement. In order to
achieve a reduction in the magnitude of stress at critical point of the chassis frame, side member thickness,
cross member thickness and position of cross member from rear end were varied. Numerical results showed that
if the thickness change is not possible, changing the position of cross member may be a good alternative.
Computed results are then compared to analytical calculation, where it is found that the maximum deflection
agrees well with theoretical approximation but varies on the magnitude aspect.
Keywords - Stress analysis, fatigue life prediction and finite element method etc.
Study of RF-MEMS Capacitive Shunt Switch for Microwave Backhaul Applications IOSRJECE
In this research paper, we have proposed a new type of capacitive shunt RF-MEMS switch. MicroElectro-Mechanical System (MEMS) is a combination of mechanical and electromagnetics properties at micro level unit. This MEMS switch can be used for switching purpose at RF and microwave frequencies, called RFMEMS switch. The RF-MEMS switch has a potential characteristics and superior performances at radio frequency. The MEMS switch has excellent advantages such as zero power consumption, high power handling capacity, high performance, and low inter-modulation distortion. In this proposed design, a new type of capacitive shunt switch is designed and analyzed for RF applications. The switch is designed both in UP and DOWN-states. The proposed switch design consists of substrate, co-planar waveguide (CPW), dielectric material and suspended metallic bridge. The proposed MEMS switch has dimension of 508 µm × 620 µm with a height of 500 µm and implemented on GaAs as a substrate material with relative permittivity of 12.9. The geometry and results of the proposed switch is designed using Ansoft HFSS electromagnetic simulator based on finite element method (FEM). The electrostatic and electromagnetic result showed better performances such as return loss, insertion loss and isolation. The switch has also excellent isolation property of -48 dB at 26 GHz.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Study and analysis of rf mems shunt switch for reconfigurable antennaeSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
A LOW POWER, LOW PHASE NOISE CMOS LC OSCILLATORIJEEE
In this paper a Double Cross Coupled Inductor capacitor based Voltage Control Oscillator (LC-VCO) is designed. In the proposed circuit the phase noise, tuning range with respect to control voltage, output power and the power dissipation of the circuit is analysed. Phase noise of approximate -96 dBc/Hz at frequency of 1MHz, frequency tuning range of 4.8 to 8.3 GHz (corresponding to 53.0% tuning range) obtained by varying the control voltage from 0 to 2.0 V, Output power of circuit -8.92 dBm at 50 Ohm resistance terminal and the power consumption of Circuit is 3.8 mW. This VCO are designed for 5.5 GHz. The circuit is designed on the UMC 180nm CMOS technology and all the simulation results are obtained using cadence SPECTRE Simulator.
COUPLER, POWER DIVIDER AND CIRCULATOR IN V-BAND SUBSTRATE INTEGRATED WAVEGUID...ijcsa
In recent years substrate integrated waveguide technology (SIW) has been applied successfully to the conception of planar compact components for the microwave and millimeter waves applications. In this study, a V-band substrate integrated waveguide coupler, power divider and circulator are conceived and optimized by Ansoft HFSS code. Thus, through this modeling, design considerations and results are discussed and presented. Attractive features including compact size and planar form make these devices structure easily integrated in planar circuits
Microelectronic technology
This report briefly discusses the need for Metal-Oxide-Semiconductor Field Effect Transistors (MOSFETs), their structure and principle of operation. Then it details the fabrication and characterization of the MOSFETs fabricated at the microelectronic lab at University of Malaya
shows the simulation and analysis of a MOSFET device using the MOSFet tool. Several powerful analytic features of this tool are demonstrated, including the following:
calculation of Id-Vg curves
potential contour plots along the device at equilibrium and at the final applied bias
electron density contour plots along the device at equilibrium and at the final applied bias
spatial doping profile along the device
1D spatial potential profile along the device
Fea of pcb multilayer stack up high voltage planar transformer for aerospace...elelijjournal
High voltage planar transformer is a technology which can replace conventional transformer with its distinct advantages of saturation and cost efficiency. This paper includes, study and solution methods for PCB winding configuration in planar magnetic elements with multilayer
stack up of PCB Cu-tracks, producing High voltage power supply for aerospace application.With finite element analysis (FEA) simulations, different simulation outcomes are discussed for inspecting flux intensity and current density distribution with computing Electric field strength
and Magnetic fields. In principal conclusion of study, complete analysis and some practical design guidelines for
multilayer PCB stack up are discussed in this paper.
This presentation presents a review of novel technology which provides a promising solution for designing self-powered microsystems. Micro-Electro Mechanical System (MEMS) energy harvesting is an emerging alternative for scavenging energy from natural sources. It has extensive potential in wireless sensor applications to provide a natural energy source that is essentially inexhaustible. It is an increasingly attractive alternative to costly batteries. This essentially free energy source is available maintenance-free throughout the lifetime of the application. Many systems, such as wireless sensor networks, portable electronics and cell phones, can use this technology as a power source. Although some types of MEMS, such as electro-magnetic MEMS, electrostatic MEMS, and piezoelectric MEMS, are used to provide energy in various applications, they have several technical barriers that limit their applications, including low efficiency, issues of scaling, and high cost.Novel MEMS solar energy harvesting technology is scalable and also easily integrated in microsystems. The RF MEMS design not only has to provide functional efficiency, but also must work within the limits of maximum charge and discharge conversion efficiency. The energy harvesting technologies currently available which utilizes RF MEMS to convert solar energy into charge, can achieve better benefits than photovoltaic cells. In this presentation the design,fabrication, testing and evaluation of RF MEMS and its working limits in charging and discharging is illustrated.
AN OPERATIONAL AMPLIFIER WITH RECYCLING FOLDED CASCODE TOPOLOGY AND ADAPTIVE ...VLSICS Design
This paper presents a highly adaptive operational amplifier with high gain, high bandwidth, high speed and low power consumption. By adopting the recycling folded cascode topology along with an adaptivebiasing circuit, this design achieves high performance in terms of gain-bandwidth product (GBW) and slew rate (SR). This single stage op-amp has been designed in 0.18µm technology with a power supply of 1.8V and a 5pF load. The simulation results show that the amplifier achieved a GBW of 335.5MHz, Unity Gain Bandwidth of 247.1MHz and a slew rate of 92.8V/µs.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
Slack (or Teams) Automation for Bonterra Impact Management (fka Social Soluti...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on the notifications, alerts, and approval requests using Slack for Bonterra Impact Management. The solutions covered in this webinar can also be deployed for Microsoft Teams.
Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...
F010314247
1. IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
e-ISSN: 2278-2834,p- ISSN: 2278-8735.Volume 10, Issue 3, Ver. I (May - Jun.2015), PP 42-47
www.iosrjournals.org
DOI: 10.9790/2834-10314247 www.iosrjournals.org 42 | Page
A Novel Design of Cantilever RF MEMS Series Switch
Shilpa G. Kulkarni
Electronics and Telecommunication Engineering
V.I.T Wadala, Mumbai-India
Abstract: This paper presents novel design of various configurations of cantilever type Radio Frequency
Micro Electro Mechanical Systems (RF MEMS) Series Switch. The paper emphasizes on study of Actuation
Voltage of RF MEMS switches. Actuation voltages of uniform cantilever switches has been compared with
cantilever switches supported on three bars (non-uniform switch) for various geometric configuration and
material properties. It is observed from the simulation results that reduction in actuation voltage as high as 5V
can be achieved by reducing the anchorage width. Also, use of mica with higher dielectric constant over silicon
nitride as dielectric layer yields considerable reduction in actuation voltage.
Keywords: Actuation Voltage, Anchorage, Cantilever Switch, RF MEMS
I. Introduction
In the last decade, several new technologies have come to the forefront and have made their mark in the
field of Electronics & Telecommunication Engineering. One such technology that has captured interests and is
extremely popular among designers across the globe is Micro Electro Mechanical Systems (MEMS). MEMS
combine the advantages of mechanical switches and semiconductor switches and thus finds a wide range of
applications. RF MEMS switch can be described as an integrated device which uses micromechanical
movement to achieve a short circuit or open circuit in the RF transmission line.
RF MEMS switch can be used as the basic building block in RF communication system. As a key
circuit element in the field of microwave control, RF MEMS switch has wide application in phase arrays and
configurable apertures for defense and telecom systems, switching networks for low power applications etc [4].
The basic beam type for the switch can be a cantilever beam or a fixed-fixed beam. A cantilever beam is fixed at
one end and the other end of the beam is free. The fixed-fixed beam is one in which both the ends of the beam are
fixed. As the actuation voltage is applied to the top & bottom electrodes, the electrostatic force developed causes
the mechanical movement of the beam to enable switching action. This assembly can be used to design an entire
switch structure on a substrate with associated electrodes, bias lines, anchors, materials etc. for respective
applications.[5]
For effective implementation and further enhancement, RF MEMS switches need to overcome issues
of higher actuation voltages, stiction, switching time and power handling capacity. This paper emphasizes on
study of Actuation Voltage for various configurations of RF MEMS switch. COMSOL Multiphysics Software
has been used for simulation of MEMS switches. The paper provides path forwards in reduction of Actuation
Voltages for RF MEMS switches and encourages designers to provide innovative solutions to overcome other
challenges of RF MEMS switches.
The subsequent modules in this paper provide an Introduction to RF MEMS Cantilever Switch, Design
Parameters to be considered in switch design, Switch Configurations presented in this paper, followed by
Simulation Results and lastly the Conclusions derived from the case studies performed.
II. RF MEMS Series Cantilever Switch
Series switch and shunt switch are the two basic switches used in RF to millimeter-wave circuit design.
The ideal series switch results in an open circuit in the transmission line when no bias voltage is applied (up-
state position), and it results in a short circuit in the transmission line when a bias voltage is applied (down-state
position). “Fig.1” shows series cantilever switch in “On” State and “Off” State position.
Ideal series switches have infinite isolation in the up-state position and have zero insertion loss in the down-state
position. MEMS series switches are used extensively for 0.1 to 40-GHz applications. They offer high isolation
at RF frequencies, around -50 dB to -60 dB at 1 GHz and rising to -20 to -30 dB at 20 GHz. In the down-state
position, they result in very low insertion loss, around -0.1 to -0.2 dB at 0.1 to 40 GHz.[5]
2. A Novel Design of Cantilever RF MEMS Series Switch
DOI: 10.9790/2834-10314247 www.iosrjournals.org 43 | Page
(a)
(b)
(c)
Fig. 1 (a) Schematic view of cantilever series RF MEMS switch (b) Off-state switch position (c) On-state switch
position [6]
III. Design Parameters
The switch design begins with selection of actuation technique. Different parameters to be considered
in the design of RF switches are Transition Time, Switching Rate, Switching Transients, RF Power handling,
Bandwidth, Insertion Loss, Isolation, Series Resistance, Actuation Voltage, Lifecycle, Resonant Frequency,
Interception and Level of Distortion, Phase and Amplitude tracking. This paper aims at reduction in actuation
voltage for uniform and non-uniform switch configuration. The actuation voltage of MEMS Switches can be
written as:
(1)
Where, k is the spring constant of cantilever beam, ε0 is permittivity of free space, g0 is beam height
and A is area of pull down electrode.
Thus, to reduce the actuation voltage designers can either reduce the spring constant of beam or reduce
the gap height or increase the area of electrodes. However, reduction in gap height shall compromise the
isolation aspect and RF performance parameters.
Reduction in spring constant of cantilever beam can be achieved by using low density material, by
increasing the cantilever length of beam, by using lesser thickness of beam or by reducing the anchorage width.
For miniature switch design increasing beam length is definitely not preferable. The parameter „A‟ in (1)
represents effective field area and can be maximized by increasing length of pull down electrode.
IV. Switch Configuration
Two distinct geometric configurations of the cantilever beam have been considered in the simulation
design: Uniform Cantilever Beam, Cantilever beam supported on three bars at anchor location (Non-uniform
beam) as shown in “Fig. 2”.
3. A Novel Design of Cantilever RF MEMS Series Switch
DOI: 10.9790/2834-10314247 www.iosrjournals.org 44 | Page
Fig. 2 Plan of cantilever switch supported on three bars at anchor location
Beams of varying material properties and geometric properties were considered to minimize the Actuation
Voltage. “Table 1” and “Table 2” provide detail of beam configurations considered in simulation.
Table 1 Non-Uniform cantilever switch configurations
Study No
Non-Uniform Cantilever Switch
Top Electrode
Bottom
Electrode Length
Dielectric
Material
Study 1 L:140µm, w: 60µm. Material Gold, a: 20µm, b: 10µm, c: 15µm. 60µm
Silicon nitride
(ε = 7 )
Study 2 L:140µm, w: 60µm. Material Gold, a: 20µm, b: 10µm, c: 15µm. 75µm
Silicon nitride
(ε = 7 )
Study 3 L:140µm, w: 60µm. Material Gold, a: 20µm, b: 10µm, c: 15µm. 95µm
Silicon nitride
(ε = 7 )
Study 4 L:140µm, w: 60µm. Material Gold, a: 20µm, b: 10µm, c: 15µm. 75µm Mica (ε = 6 )
Study 5 L:140µm, w: 60µm. Material Gold, a: 20µm, b: 10µm, c: 15µm. 95µm Mica (ε = 6 )
Study 6 L:140µm, w: 60µm. Material Gold, a: 20µm, b: 10µm, c: 15µm. 95µm Mica (ε = 9)
Study 7 L:140µm, w: 60µm. Material Gold, a: 20µm, b: 10µm, c: 15µm. 60µm Mica (ε = 9)
Table 2 Uniform cantilever switch configurations
Study No
Uniform Cantilever Switch
Top Electrode
Bottom
Electrode Length
Dielectric Material
Study 8 L:140µm, w: 60µm. Material Gold. 60µm
Silicon nitride
(ε = 7 )
Study 9 L:140µm, w: 60µm. Material Gold. 75µm
Silicon nitride
(ε = 7 )
Study 10 L:140µm, w: 60µm. Material Gold. 95µm
Silicon nitride
(ε = 7 )
Study 11 L:140µm, w: 60µm. Material Gold. 75µm Mica (ε = 6 )
Study 12 L:140µm, w: 60µm. Material Gold. 95µm Mica (ε = 6 )
Study 13 L:140µm, w: 60µm. Material Gold. 95µm Mica (ε = 9)
Study 14 L:140µm, w: 60µm. Material Gold. 60µm Mica (ε = 9)
V. Simulation Results
Case-1 Non-Uniform Beam Simulation Results
The basic geometric configuration (Study 1) of non-uniform MEMS switch (Cantilever switch
supported on three bars) presented in this paper is referred from conference paper [1]. Several case studies have
been further developed by varying the geometric and material properties for the MEMS switch.
The non uniform beam has a low spring constant of 3.37N/m2
[1]. Low Spring constant of beam leads
to low actuation voltage. Comsol Multiphysics software is used to simulate the RF MEMS cantilever switch.
Table 3 provides the simulation results of non-uniform beam cantilever switch.
4. A Novel Design of Cantilever RF MEMS Series Switch
DOI: 10.9790/2834-10314247 www.iosrjournals.org 45 | Page
Fig. 3 Simulation schematic of cantilever switch supported on three bars at anchor location
Table 3 Actuation voltage for non-uniform cantilever switch configurations
Study No
Non-Uniform Cantilever Switch
Bottom Electrode Length Dielectric Material Actuation Voltage
Study 1 60µm Si3N4 (ε = 7 ) 17.2V
Study 2 75µm Si3N4 (ε = 7 ) 17.6V
Study 3 95µm Si3N4 (ε = 7 ) 13.3V
Study 4 75µm Mica (ε = 6 ) 17.9V
Study 5 95µm Mica (ε = 6 ) 13.5V
Study 6 95µm Mica (ε = 9) 12.9V
Study 7 60µm Mica (ε = 9) 17.0V
(a) (b)
Fig. 4 (a) Study 1 Deflection - Actuation Voltage 17.2V (b) Study 6 Deflection - Actuation Voltage 12.9V
“Fig. 4” and “Fig. 5” present the Comsol Multiphysics Ssoftware simulation results for non-uniform
and uniform beam RF MEMS switch respectively. The alumina material is used for substrate to achieve a good
RF performance because of low loss of alumina with dielectric constant 9.9 and for beam Gold material is used
because of its properties like young‟s modulus is 79GPa, density is 19300 and it has low compressive residual
stress.
Case-2 Uniform Beam Simulation Results
A uniform cantilever beam made of gold has been considered for simulation using COMSOL Multiphisysics
software. Table 4 presents the simulation results for uniform cantilever switch for various configurations.
Table 4 Actuation voltage for uniform cantilever switch configurations
Study No
Uniform Cantilever Switch
Bottom Electrode Length Dielectric Material Actuation Voltage
Study 8 60µm Si3N4 (ε = 7 ) 22.5V
Study 9 75µm Si3N4 (ε = 7 ) 23.5V
Study 10 95µm Si3N4 (ε = 7 ) 17.4V
Study 11 75µm Mica (ε = 6 ) 23.8V
Study 12 95µm Mica (ε = 6 ) 18.0V
Study 13 95µm Mica (ε = 9) 17.2V
Study 14 60µm Mica (ε = 9) 21.5V
5. A Novel Design of Cantilever RF MEMS Series Switch
DOI: 10.9790/2834-10314247 www.iosrjournals.org 46 | Page
(a) (b)
Fig. 5 (a) Study 8 Deflection - Actuation Voltage 22.5V (b) Study 13 Deflection - Actuation Voltage 17.2V
The actuation voltage for uniform switches is observed to be higher than non uniform switches of similar
configuration by approximately 5V. “Fig. 6” and “Fig. 7” provide graphical representation of simulation results
obtained for various case studies.
(a) (b)
Fig. 6 (a) Actuation voltages of non-uniform beam with different configurations (b) Actuation voltages of
uniform beam with different configurations
Fig. 7 Comparisons of non-uniform and uniform beam with different configurations
VI. Conclusion
Novel uniform and non-uniform cantilever switches were presented. Geometric parameters and
dielectric material were varied to study the effect on actuation voltage of RF MEMS series cantilever switch.
Actuation voltage as low as 12.9V could be obtained for non-uniform switch by using Mica as dielectric
material with ε = 9 and by adopting 95µm length of bottom electrode. Owing to higher stiffness actuation
voltages for uniform switches is observed to be higher than non-uniform switches of similar configuration by
approximately 5V. Minimum actuation voltage of 17.2V could be obtained for uniform switch (Study 13) as
compared to 12.9V for non-uniform switch with similar configuration.
6. A Novel Design of Cantilever RF MEMS Series Switch
DOI: 10.9790/2834-10314247 www.iosrjournals.org 47 | Page
Acknowledgment
I would like to express the deepest appreciation to my mentor Prof. Girish Gidaye and Prof. Geetha
Narayanan who have continuously and convincingly conveyed a sprit for research and development. Without
their guidance and persistent help this study wouldn‟t have been possible. Special thanks to my family and
friends for the inspiration and kind support. I would take this opportunity to thank all those who have
encouraged and helped me in preparing this module and who have extended me much understanding, patience
and support.
References
[1]. A.S.Revandkar, A.R.Khachane, G.D.Nagare, Analyzing the Effect of Metals on the Dynamic Performance of RF MEMS Switch,
2014 International conference on Electronics and communication Systems (ICECS - 2014), Feb 13-14, 2014, Coimbatore, India
[2]. G. M. Rebeiz, RF MEMS Theory, design and Technology ( John Wiley & Sons Ltd, New Jersey, 2002).
[3]. V.K.Varadan, K.J.Vinoy, K..A.Jose, RF MEMS and Their Applications (John Wiley & Sons Ltd, England, 2003).
[4]. H. U. Rahman, R.Ramer, Supported Bars Novel Cantilever Beam Design for RF MEMS Series Switches, 9th IEEE
Conference on Nanotechnology,IEEE 2009.