This document discusses an introduction to optical fiber communication systems. It covers basic optical laws and definitions related to mode theory for circular waveguides. It also covers single mode and graded-index optical fibers. The document includes 16 questions related to optical fiber communication topics such as numerical aperture, total internal reflection, fiber types, and a comparison of optical vs. satellite communication.
A Novel Design of a Miniature Metamaterial Antenna for RFID Reader ApplicationsTELKOMNIKA JOURNAL
In this article, we propose a novel design of a dual band antenna based metamaterial for RFID
applications. The proposed antenna consists of a rectangular patch using inverted u-slot in radiating
element and two split ring resonators loaded in the ground plane. The antenna is printed on an FR4
substrate having athickness of 1.6 mm, permitivitty of 4.4 and loss tanget of 0.025. this antenna is feed by
a micostrip line having caracteristique of 50 Ohms. The designed antenna resonates at the UHF band
around 900Mz with an input impedance of 87MHz and also, resonates at the ISM band around 2.45GHz
with a large bandwidth about 516MHz. The designed antenna is simulated bys using CST and the results
is validated by HFSS. After simulation, a prototype of the proposed antenna is fabricated, and the
measured results show a good agreement with the simulated one.
Fiber optics and how optical communication takes place.Details regarding how signalling,routing and switching occurs in optical network .A little detail about various equipments used in optical communication.
we have discussed the following content
Introduction
Construction
Working
QD Laser vs Normal Laser
Market Demand
Application
Characteristics
Advantages
Disadvantages
Conclusion
Summary
A new design and a new application of a metamaterial that converts 36.8% of incident power from a 900 MHz signal into usable dc voltage.experimentally rectified by an array of metamaterial unit cells.
3 d single gaas co axial nanowire solar cell for nanopillar-array photovoltai...ijcsa
Nanopillar array photovoltaics give unique advantages over today’s planar thin films in the areas of
optical properties and carrier collection, arising from their 3D geometry. The choice of the material
system, however, is essential in order to gain the advantage of the large surface/interface area associated
with nanopillars. Therefore, a well known Si and GaAs material are used in the design and studied in this
nanowire application. This work calculates and analyses the performance of the coaxial GaAs nanowire
and compared with that of Si nanowire using a semi-classical method. The current-voltage characteristics
are investigated for both under dark and AM1.5G illumination. It is found that GaAs nanowire gives almost
double efficiency with its counterpart Si nanowire. Their TCAD simulations can be validated reasonably
with that of published experimental result.
SUN Telecom’s SUN-LS200 series Handheld Optical Fiber Output Power Variable Light Source emits
excellent stability laser for fiber optic measurement. This Light Source is able to offer wavelength and
frequency identification information, which is widely applied with SUN Telecom’s SUN-OPM200 series
Power Meter for testing the optical loss of both single mode (SM) and multimode (MM) fiber optic cable.
Metamaterial loaded microstrip patch antenna for quad band operationeSAT Journals
Abstract In this paper, a novel design for miniaturization of microstrip patch antenna with multiband operation of microstrip antenna is proposed. The technique is based on etching out of Complimentary Split-Ring Resonator (CSRR) on the radiating edge of the patch antenna. Numerical simulations are presented for a patch antenna with and without CSRRs by using IE3D simulation software and measured practically. The measured results shows that antenna with CSRRs on the radiating edge of the patch antenna is resonating at four different frequency points i.e., 4.96GHz, 6.05GHz, 8.62GHz and 11.25GHz., whereas, antenna without CSRR i.e., conventional microstrip antenna is resonating at 5.98GHz. The size reduction of 16.92% is achieved and the antenna gives the overall bandwidth of 17.88%. These antennas find application in Wireless Communications. Keywords: microstrip antenna, CSRR, return loss, miniaturization, bandwidth.
Microstrip patch antenna with metamaterial using superstrate technique for wi...journalBEEI
This work builds a metamaterial (MTM) superstrate loaded on a patch of microstrip antenna for wireless communications. The MTM superstrate is made up of four G-shaped resonators on FR-4 substrate with a relative permittivity of 4.4 and has a total area of (8×16) mm2, and is higher than the patch. The MTM superstrate increases antenna gain while also raising the input reflection coefficient. When it is 9 mm above the patch, the gain increased from 3.28 dB to 6.02 dB, and when it is 7 mm above the patch, the input reflection coefficient was enhanced from -31.217 dB to -45.8 dB. When the MTM superstrate loaded antenna was compared to the traditional unloaded antenna, it was discovered that metamaterials have a lot of potential for improving antenna performance.
Analysis of Metamaterial Based Microstrip Array Antennaijceronline
Metamaterials have been intensively researched due to their peculiar features such as negative permittivity and/or permeability and ultra-refraction phenomenon. To satisfy the demand of commonly used wireless communication systems, an antenna which can operate at higher frequencies and enhanced characteristics are desirable. The arrangement of all elements is done that they provide an improvement in bandwidth, directivity return loss etc. The frequency response of a metamaterial can be tailored by varying its characteristics. A new metamaterial structure using square and ring split ring resonator is proposed. Using this metamaterial structure, a microstrip patch antenna is designed with enhanced characteristics such as reduction in return lossfrom-20dB to -36dB with tunability is achieved.
A Novel Design of a Miniature Metamaterial Antenna for RFID Reader ApplicationsTELKOMNIKA JOURNAL
In this article, we propose a novel design of a dual band antenna based metamaterial for RFID
applications. The proposed antenna consists of a rectangular patch using inverted u-slot in radiating
element and two split ring resonators loaded in the ground plane. The antenna is printed on an FR4
substrate having athickness of 1.6 mm, permitivitty of 4.4 and loss tanget of 0.025. this antenna is feed by
a micostrip line having caracteristique of 50 Ohms. The designed antenna resonates at the UHF band
around 900Mz with an input impedance of 87MHz and also, resonates at the ISM band around 2.45GHz
with a large bandwidth about 516MHz. The designed antenna is simulated bys using CST and the results
is validated by HFSS. After simulation, a prototype of the proposed antenna is fabricated, and the
measured results show a good agreement with the simulated one.
Fiber optics and how optical communication takes place.Details regarding how signalling,routing and switching occurs in optical network .A little detail about various equipments used in optical communication.
we have discussed the following content
Introduction
Construction
Working
QD Laser vs Normal Laser
Market Demand
Application
Characteristics
Advantages
Disadvantages
Conclusion
Summary
A new design and a new application of a metamaterial that converts 36.8% of incident power from a 900 MHz signal into usable dc voltage.experimentally rectified by an array of metamaterial unit cells.
3 d single gaas co axial nanowire solar cell for nanopillar-array photovoltai...ijcsa
Nanopillar array photovoltaics give unique advantages over today’s planar thin films in the areas of
optical properties and carrier collection, arising from their 3D geometry. The choice of the material
system, however, is essential in order to gain the advantage of the large surface/interface area associated
with nanopillars. Therefore, a well known Si and GaAs material are used in the design and studied in this
nanowire application. This work calculates and analyses the performance of the coaxial GaAs nanowire
and compared with that of Si nanowire using a semi-classical method. The current-voltage characteristics
are investigated for both under dark and AM1.5G illumination. It is found that GaAs nanowire gives almost
double efficiency with its counterpart Si nanowire. Their TCAD simulations can be validated reasonably
with that of published experimental result.
SUN Telecom’s SUN-LS200 series Handheld Optical Fiber Output Power Variable Light Source emits
excellent stability laser for fiber optic measurement. This Light Source is able to offer wavelength and
frequency identification information, which is widely applied with SUN Telecom’s SUN-OPM200 series
Power Meter for testing the optical loss of both single mode (SM) and multimode (MM) fiber optic cable.
Metamaterial loaded microstrip patch antenna for quad band operationeSAT Journals
Abstract In this paper, a novel design for miniaturization of microstrip patch antenna with multiband operation of microstrip antenna is proposed. The technique is based on etching out of Complimentary Split-Ring Resonator (CSRR) on the radiating edge of the patch antenna. Numerical simulations are presented for a patch antenna with and without CSRRs by using IE3D simulation software and measured practically. The measured results shows that antenna with CSRRs on the radiating edge of the patch antenna is resonating at four different frequency points i.e., 4.96GHz, 6.05GHz, 8.62GHz and 11.25GHz., whereas, antenna without CSRR i.e., conventional microstrip antenna is resonating at 5.98GHz. The size reduction of 16.92% is achieved and the antenna gives the overall bandwidth of 17.88%. These antennas find application in Wireless Communications. Keywords: microstrip antenna, CSRR, return loss, miniaturization, bandwidth.
Microstrip patch antenna with metamaterial using superstrate technique for wi...journalBEEI
This work builds a metamaterial (MTM) superstrate loaded on a patch of microstrip antenna for wireless communications. The MTM superstrate is made up of four G-shaped resonators on FR-4 substrate with a relative permittivity of 4.4 and has a total area of (8×16) mm2, and is higher than the patch. The MTM superstrate increases antenna gain while also raising the input reflection coefficient. When it is 9 mm above the patch, the gain increased from 3.28 dB to 6.02 dB, and when it is 7 mm above the patch, the input reflection coefficient was enhanced from -31.217 dB to -45.8 dB. When the MTM superstrate loaded antenna was compared to the traditional unloaded antenna, it was discovered that metamaterials have a lot of potential for improving antenna performance.
Analysis of Metamaterial Based Microstrip Array Antennaijceronline
Metamaterials have been intensively researched due to their peculiar features such as negative permittivity and/or permeability and ultra-refraction phenomenon. To satisfy the demand of commonly used wireless communication systems, an antenna which can operate at higher frequencies and enhanced characteristics are desirable. The arrangement of all elements is done that they provide an improvement in bandwidth, directivity return loss etc. The frequency response of a metamaterial can be tailored by varying its characteristics. A new metamaterial structure using square and ring split ring resonator is proposed. Using this metamaterial structure, a microstrip patch antenna is designed with enhanced characteristics such as reduction in return lossfrom-20dB to -36dB with tunability is achieved.
Jake's Good Eats offers Tuesday Tacos, Thursday night half price, select bottles of wine, No Reservations. Tuesday thru Thursday 11:00am until 9:00pm, Friday and Saturday Lunch 11:00am until 2:30pm, Dinner 5:00pm until 9:00pm
Jake's Good Eats offers Tuesday Tacos, Thursday night half price, select bottles of wine, No Reservations. Tuesday thru Thursday 11:00am until 9:00pm, Friday and Saturday Lunch 11:00am until 2:30pm, Dinner 5:00pm until 9:00pm
This report briefly summarizes the topics I have explored during my Internship in the summer of 2019 under Dr. Anil Prabhakar, Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai-600036
Digital Wave Formulation of Quasi-Static Partial Element Equivalent Circuit M...Piero Belforte
This presentation shows a digital wave formulation
(DWF) of the quasi-static Partial Element Equivalent Circuit
formulation. Through the use of a pertinent change of variablesand the choice of a specific implementation of PEEC cell elementsin the Digital Wave domain, the standard PEEC model istransformed into and solved as a wave digital network. The
example reported shows the accuracy and the significant speedup up to 627X of the proposed DWF-based PEEC solver when compared to the standard Spice solution.
Presented at SPI2016, Turin, May 2016.
New folderelec425_2016_hw5.pdfMar 25, 2016 ELEC 425 S.docxcurwenmichaela
New folder/elec425_2016_hw5.pdf
Mar 25, 2016
ELEC 425 Spring 2016 HW 5 Questions
due in class on Tue Mar 31, 2016
1) Read Sec. 1.11 from the textbook. Use the conventions plotted on Fig. 1.42 to derive the TM
matrix in Eq. 1.253.
2) The file Tmatrix.m is a Matlab script that evaluates the reflection and transmission coefficients
for TE and TM polarizations. Analyze the code, and write a script that uses Tmatrix.m to
generate Fig. 3 from Winn1998.pdf file. When the output from the Matlab code is overlaid with
Fig. 3 from the paper, they should match exactly as shown below. Note the dB scale in the
figure.
3) Read the following tutorial from the Lumerical website.
https://kb.lumerical.com/en/diffractive_optics_stack.html
First, run and verify the tutorial. Then, modify the tutorial files so that you simulate 0° and 45°
results from Fig. 3 of the Winn1998.pdf paper as shown above. The structure is composed of a
total of 12 layers: air on the entrance and exit sides, and five repetitions of two quarter wave
(𝑑1 + 𝑑2 =
𝜆1
4
+
𝜆2
4
= 𝑎) layers of refractive index 𝑛1 = 1.7 and 𝑛2 = 3.4 and thicknesses 𝑑1
and 𝑑2. Export your simulation results, import them into Matlab, and plot the output from part
2) with the output from Lumerical FDTD on the same plot. Verify that FDTD code results in a
similar set of results.
Please hand in your derivations, your plots and the relevant code used to generate the plots all
stapled together.
You can find the required files under the Handouts section on the course website at:
http://courses.ku.edu.tr/elec425
https://kb.lumerical.com/en/diffractive_optics_stack.html
http://courses.ku.edu.tr/elec425
New folder/PhotonicsLaserEngineering.pdf.part
Digital Wave Simulation of Quasi-Static Partial Element Equivalent Circuit Me...Piero Belforte
This is an extended version of the paper published on IEEE Transactions on EMC, October 2016. PEEC modeling is a well established technique for obtaining a circuit equivalent for an electromagnetic problem. The time domain solution of such models is usually performed using nodal voltages and branch currents, or sometimes charge and currents. The present paper describes a possible alternative approach which can be obtained expressing and solving the problem in the waves domain. The digital wave theory is used to find an equivalent representation of the PEEC circuit in the wave domain. Through a pertinent continuous to discrete time transformation, the constitutive relations for partial inductances, capacitances and resistances are translated in an explicit form. The combination of such equations with Kirchhoff laws allows to achieve a semi-explicit resolution scheme. Three different physical configurations are analyzed and their extracted Digital Wave PEEC models are simulated at growing sizes using the general-purpose Digital Wave Simulator (DWS). The results are compared to those obtained by using standard SPICE simulators in both linear and nonlinear cases. When the size of the model is manageable by SPICE, an excellent accuracy and a speed-up factor of up to three orders of magnitude are observed with much lower memory requirements. PEEC model sizes manageable by DWS are also an order of magnitude larger than SPICE. A comparative analysis of results including the effect of parameters like the simulation time step choice is also presented.
Similar to 8th Sem Subject Ofc1st chapter notes by Lohith kumar 11GUEE6018 (20)
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Thesis Statement for students diagnonsed withADHD.ppt
8th Sem Subject Ofc1st chapter notes by Lohith kumar 11GUEE6018
1. 2K6EC802: OPTICAL COMMUNICTION
Lectures: 4 Hours/Week Part-A | Chapter 1
Introduction: Evolution of fiber optic communication system. Advantages,
Basic optical laws and definitions. Mode theory for circular waveguides,
Single mode and Graded - index fiber
Structures 7 hours.
1st chapter related question and Answers
1. With help of a schematicdiagram explain the optical fiber
communication system?
2. Derive an expression for numerical aperture of the fiber?
3. Explain the common optical fiber cable structure?
4. With the Help of Snell’s law illustrate the phenomenon of Total internal
reflections?
5. The refractive index of glass 1.5 and that of air is 1.0. Calculate the critical
6. Whatis numerical aperture?Deduce an expression for the same?
7. Compare the following fibers.
Single – Mode step index
Multi – Mode step index
Graded index and give the typical dimensions also.
8. Explain the concept of total internal reflection using snell’sLaw ?
2. 9. Calculate the critical angle given thatn1= 1.50 for glass and n2=1.00 for
10. Explain brieflydifferenttypes of optical fibers and their properties?
11. Define the following terms with figures
Numerical aperture
Acceptance angle
Critical angle
Step index refractive index profile
Graded index refractive index profile
12. A step index fiber with a large core diameter compared with the
wavelength of transmitted light has an acceptance angle in air of 22˚ and
relative RI difference of 3%. Estimate the numerical aperture and the
critical angle at the core – cladding interface for the fiber.
13. Compare the optical communication with satellite communication?
14.A step fiber has a normalizedfrequency V=28 at1550nmwave length .if
the core radius is 25µm. find the numerical aperture. Alsocalculate the
number of modes M entering the fiber.
15. IIustratesnell’s law for a fiber with the refractive indexes of the core and
cladding 1.48and 1..46. Take one incidence angle each greater and lesser
than critical angle of incidence Φc for the illustration.
16. A step index fiber has a normalized frequency V=28ata 1550 nm wave
length. If the core radius is 25µm,findthe numerical aperture. Also
calculate the number of modes M entering the fiber.
3. 1. With help of a schematicdiagram explain the optical fiber
communication system?
Solution:
4.
5.
6.
7.
8. 3. Video
Broad Cost T V
Tv Mini Cameras
4.In Data Sharing and communication
Computers
Cpu to peripherals
Cpu to Cpu
Lans
Aircrafts
Satellite ground station
5. Sensors
Hydrophone
Position Temp pressuring and currentetc.
9. 2) Derive an expression for numerical aperture of the fiber?
Solution :
10.
11. 3) Explain the common optical fiber cable structure?
Solution :
12.
13. 4) With the Helpof Snell’s law illustrate the phenomenon of Total internal
reflections?
Or
8) Explain the concept of total internal reflection using snell’sLaw ?
Solution :
14.
15. 5) What is numerical aperture?Deduce an expression for the same?
Solution :
16.
17. 7. Compare the following fibers.
Single – Mode step index
Multi – Mode step index
Graded index and give the typical dimensions also.
Solution : Pls attaché notes from Surya
11) Define Acceptance angle and Explain with diagram ?
Solution :
18. 13) Compare the optical communication with satellite communication?
Solution :
Optical Communication Satellite Communication
1 Transmission Media is
Optical Fiber cable
Transmission mediais airline
2 Carrier Bandwidth is 105 GHZ Carrier Bandwidth is 6 GHZ
3 Message signal is transmitted
in the lightwith carrier
Message signal is transmitted in the
electromagneticwith carrier
4 Low cost High Cost
5 It required to boost the signal Not required to boost the signal
6 FastCommunication Slow Communication
7 Immunity to interference No immunity to interference
8 High bandwidth Lower bandwidth