SlideShare a Scribd company logo
F-18TC Roll no.22
 A radio frequency power amplifier (RF power
amplifier) is a type of electronic amplifier that
converts a low-power radio-frequency signal into
a higher power signal. Typically, RF power
amplifiers drive the antenna of a transmitter.
Design goals often include gain, power output,
bandwidth, power efficiency, linearity (low signal
compression at rated output), input and output
impedance matching, and heat dissipation.
 Contents
 Amplifier classes
 Applications
 Amplifier classes:
 Many modern RF amplifiers operate in different modes, called
“classes”, to help achieve different design goals. Some classes
are class A, class AB, class B, class C, which are considered the linear
amplifier classes. In these classes the active device is used as a
controlled current source. The bias at the input determines the class
of the amplifier. A common trade-off in power amplifier design is the
trade-off between efficiency and linearity. The previously named
classes become more efficient, but less linear in the order they are
listed. Operating the active device as a switch results in higher
efficiency, theoretically up to 100%, but lower linearity.[1] Among the
switch-mode classes are Class D, Class F and class E.[2] The Class D
amplifier is not often used in RF applications, because the finite
switching speed of the active devices and possible charge storage in
saturation could lead to a large I-V product[1], which deteriorates
efficiency.
 Solid state
 Modern RF power amplifiers use solid-state devices,
predominantly MOSFETs (metal-oxide-semiconductor field-effect
transistors).[3][4][5] The earliest MOSFET-based RF amplifiers date back
to the mid-1960s.[6] Bipolar junction transistors were also commonly
used in the past.
 Applications:
 The basic applications of the RF power
amplifier include driving to another high
power source, driving a
transmitting antenna and
exciting microwave cavity resonators.
Among these applications, driving
transmitter antennas is most well known.
The transmitter–receivers are used not only
for voice and data communication but also
for weather sensing (in the form of
a radar).[citation needed]
 RF power amplifiers using LDMOS (laterally
diffused MOSFET) are the most widely
used power semiconductor
INTRODUCTION:
The radio frequency (RF) power amplifier (PA) is a key component in
modern telecommunication systems since its power consumption
dominates the other parts in the system. The purpose of the RF PA is
to amplify the radio signal to a necessary power level for transmission
to the receiver. The transmission is performed through the air. It is
important to handle the PA's conflicting behaviors of efficiency and
linearity in this process. RF PAs are divided into different classes, i.e.
A, AB, B etc., with respect to their power efficiency. In RF PAs there is a
trade-off between efficiency (defined as the ratio of the generated and
consumed RF and DC powers, respectively) and linearity. High
efficiency and high linearity cannot be achieved at the same time.
Class A RF PAs belong to the group of weakly nonlinear systems [1].
The inherent nonlinearity of the PA causes interference with other
transmitting channels and is something that one wants to avoid.
Modern digital modulation techniques offer high data rates but use
high bandwidths and peak-to-average ratios. Together with the
nonlinear behavior of the PA, it enlarges the interference problem and
leads to spreading of the transmitted spectrum which is often referred
to as spectral regrowth. The only solution to the above problem is the
use of linear PAs. The design of linear and efficient RF PAs in modern
radio telecommunication systems has been described in the literature.
 FM transmitter circuit and FM Radio using radio frequency
tuned FM transmitter circuits it is base on the concept of
electronic transmitter circuit where it has three basic
components, there are oscillator circuit, form of modulation
and power amplifier circuit. process is the transmitting
frequency for broadcasting. The functions of variable
capacitor are to match the proper frequency for broadcasting.
 This FM Telephone Transmitter circuit is a combination of
small circuits there are rectifier circuit, Fm oscillator circuit
and power amplifier circuit. It is communicate to other people
by radio frequency tower This kind of parts is important for
life .
 Transmitter antennas is most well known.
The transmitter–receivers are used not only for voice and data
communication but also for weather sensing (in the form of
a radar).

More Related Content

What's hot

power line carrier communication
power line carrier communicationpower line carrier communication
power line carrier communicationLAVANYA d
 
Am Radio Receiver And Amplifier Experiment And Am Transmission Demonstration
Am Radio Receiver And Amplifier Experiment And Am Transmission DemonstrationAm Radio Receiver And Amplifier Experiment And Am Transmission Demonstration
Am Radio Receiver And Amplifier Experiment And Am Transmission Demonstrationguestb0bbf0
 
Powerlinecarrier (3)
Powerlinecarrier (3)Powerlinecarrier (3)
Powerlinecarrier (3)ajay901551
 
DESIGN OF HIGH EFFICIENCY TWO STAGE POWER AMPLIFIER IN 0.13UM RF CMOS TECHNOL...
DESIGN OF HIGH EFFICIENCY TWO STAGE POWER AMPLIFIER IN 0.13UM RF CMOS TECHNOL...DESIGN OF HIGH EFFICIENCY TWO STAGE POWER AMPLIFIER IN 0.13UM RF CMOS TECHNOL...
DESIGN OF HIGH EFFICIENCY TWO STAGE POWER AMPLIFIER IN 0.13UM RF CMOS TECHNOL...VLSICS Design
 
Communication system 1 chapter 3 - am-power
Communication system 1 chapter 3 - am-powerCommunication system 1 chapter 3 - am-power
Communication system 1 chapter 3 - am-powerBetelihemMesfin1
 
Representation of short & medium transmission lines
Representation of short & medium transmission linesRepresentation of short & medium transmission lines
Representation of short & medium transmission linesvishalgohel12195
 
Basis principles of hvdc
Basis principles of hvdcBasis principles of hvdc
Basis principles of hvdcrakesh_rath
 
Power control in power systems
Power control in power systemsPower control in power systems
Power control in power systemsAbhinash Yadav
 
Frequency modulation
Frequency modulationFrequency modulation
Frequency modulationgopi789
 
Hvdc transmission
Hvdc transmissionHvdc transmission
Hvdc transmissionsipr
 

What's hot (18)

Chapter02 fund of es.
Chapter02 fund of es.Chapter02 fund of es.
Chapter02 fund of es.
 
power line carrier communication
power line carrier communicationpower line carrier communication
power line carrier communication
 
Am fm transmitter
Am fm transmitterAm fm transmitter
Am fm transmitter
 
Am Radio Receiver And Amplifier Experiment And Am Transmission Demonstration
Am Radio Receiver And Amplifier Experiment And Am Transmission DemonstrationAm Radio Receiver And Amplifier Experiment And Am Transmission Demonstration
Am Radio Receiver And Amplifier Experiment And Am Transmission Demonstration
 
Power Line Carrier Communication PLCC
Power Line Carrier Communication PLCCPower Line Carrier Communication PLCC
Power Line Carrier Communication PLCC
 
Powerlinecarrier (3)
Powerlinecarrier (3)Powerlinecarrier (3)
Powerlinecarrier (3)
 
Rugged Low Noise Radar Power Supplies
Rugged Low Noise Radar Power SuppliesRugged Low Noise Radar Power Supplies
Rugged Low Noise Radar Power Supplies
 
DESIGN OF HIGH EFFICIENCY TWO STAGE POWER AMPLIFIER IN 0.13UM RF CMOS TECHNOL...
DESIGN OF HIGH EFFICIENCY TWO STAGE POWER AMPLIFIER IN 0.13UM RF CMOS TECHNOL...DESIGN OF HIGH EFFICIENCY TWO STAGE POWER AMPLIFIER IN 0.13UM RF CMOS TECHNOL...
DESIGN OF HIGH EFFICIENCY TWO STAGE POWER AMPLIFIER IN 0.13UM RF CMOS TECHNOL...
 
Communication system 1 chapter 3 - am-power
Communication system 1 chapter 3 - am-powerCommunication system 1 chapter 3 - am-power
Communication system 1 chapter 3 - am-power
 
Amplitude modulation
Amplitude modulationAmplitude modulation
Amplitude modulation
 
Representation of short & medium transmission lines
Representation of short & medium transmission linesRepresentation of short & medium transmission lines
Representation of short & medium transmission lines
 
Basis principles of hvdc
Basis principles of hvdcBasis principles of hvdc
Basis principles of hvdc
 
Chapter03
Chapter03Chapter03
Chapter03
 
Power control in power systems
Power control in power systemsPower control in power systems
Power control in power systems
 
Frequency modulation
Frequency modulationFrequency modulation
Frequency modulation
 
FM Transmitter
FM TransmitterFM Transmitter
FM Transmitter
 
Am10
Am10Am10
Am10
 
Hvdc transmission
Hvdc transmissionHvdc transmission
Hvdc transmission
 

Similar to Presented by mueez akhtar Arain

Engineering plant facilities 10 mechanics building general
Engineering plant facilities 10 mechanics building generalEngineering plant facilities 10 mechanics building general
Engineering plant facilities 10 mechanics building generalLuis Cabrera
 
EC 6651 Communication Engineering
EC 6651 Communication EngineeringEC 6651 Communication Engineering
EC 6651 Communication Engineeringrmkceteee
 
Iaetsd design and implementation of
Iaetsd design and implementation ofIaetsd design and implementation of
Iaetsd design and implementation ofIaetsd Iaetsd
 
1 radar basic - part ii
1 radar basic - part ii1 radar basic - part ii
1 radar basic - part iiSolo Hermelin
 
Final presentation
Final presentationFinal presentation
Final presentationAhmadoof
 
Chapter 47
Chapter 47Chapter 47
Chapter 47mcfalltj
 
Class-F RF Power Amplifier with a New Load Network Configuration
Class-F RF Power Amplifier with a New Load Network ConfigurationClass-F RF Power Amplifier with a New Load Network Configuration
Class-F RF Power Amplifier with a New Load Network ConfigurationFiras Mohammed Ali Al-Raie
 
RADIO TRANSMITTERS.docx
RADIO TRANSMITTERS.docxRADIO TRANSMITTERS.docx
RADIO TRANSMITTERS.docxCyprianObota
 
0 lecture 3 wp wireless protocol
0 lecture 3 wp wireless protocol0 lecture 3 wp wireless protocol
0 lecture 3 wp wireless protocolumardanjumamaiwada
 
Am transmitter
Am transmitterAm transmitter
Am transmitterAJAL A J
 
microwave-systems-1
microwave-systems-1microwave-systems-1
microwave-systems-1ATTO RATHORE
 
Paper id 36201528
Paper id 36201528Paper id 36201528
Paper id 36201528IJRAT
 
Application of Transformer in ECE(electronics and communication engineering)
Application of Transformer in ECE(electronics and communication engineering) Application of Transformer in ECE(electronics and communication engineering)
Application of Transformer in ECE(electronics and communication engineering) yonas yifter
 
RF_MEMS_A_Review_on_State_of_Art (1).pptx
RF_MEMS_A_Review_on_State_of_Art (1).pptxRF_MEMS_A_Review_on_State_of_Art (1).pptx
RF_MEMS_A_Review_on_State_of_Art (1).pptxAshokB47
 
A 10 d bm 25 dbm, 0.363 mm2 two stage 130 nm rf cmos power amplifier
A 10 d bm 25 dbm, 0.363 mm2 two stage 130 nm rf cmos power amplifierA 10 d bm 25 dbm, 0.363 mm2 two stage 130 nm rf cmos power amplifier
A 10 d bm 25 dbm, 0.363 mm2 two stage 130 nm rf cmos power amplifierVLSICS Design
 

Similar to Presented by mueez akhtar Arain (20)

Unit- 3 Transmitters and Recivers.ppt
Unit- 3  Transmitters and Recivers.pptUnit- 3  Transmitters and Recivers.ppt
Unit- 3 Transmitters and Recivers.ppt
 
Engineering plant facilities 10 mechanics building general
Engineering plant facilities 10 mechanics building generalEngineering plant facilities 10 mechanics building general
Engineering plant facilities 10 mechanics building general
 
EC 6651 Communication Engineering
EC 6651 Communication EngineeringEC 6651 Communication Engineering
EC 6651 Communication Engineering
 
WIRELESS FM Microphone
 WIRELESS FM Microphone WIRELESS FM Microphone
WIRELESS FM Microphone
 
Iaetsd design and implementation of
Iaetsd design and implementation ofIaetsd design and implementation of
Iaetsd design and implementation of
 
1 radar basic - part ii
1 radar basic - part ii1 radar basic - part ii
1 radar basic - part ii
 
Final presentation
Final presentationFinal presentation
Final presentation
 
Chapter 47
Chapter 47Chapter 47
Chapter 47
 
Class-F RF Power Amplifier with a New Load Network Configuration
Class-F RF Power Amplifier with a New Load Network ConfigurationClass-F RF Power Amplifier with a New Load Network Configuration
Class-F RF Power Amplifier with a New Load Network Configuration
 
RADIO TRANSMITTERS.docx
RADIO TRANSMITTERS.docxRADIO TRANSMITTERS.docx
RADIO TRANSMITTERS.docx
 
0 lecture 3 wp wireless protocol
0 lecture 3 wp wireless protocol0 lecture 3 wp wireless protocol
0 lecture 3 wp wireless protocol
 
Am transmitter
Am transmitterAm transmitter
Am transmitter
 
microwave-systems-1
microwave-systems-1microwave-systems-1
microwave-systems-1
 
Paper id 36201528
Paper id 36201528Paper id 36201528
Paper id 36201528
 
Application of Transformer in ECE(electronics and communication engineering)
Application of Transformer in ECE(electronics and communication engineering) Application of Transformer in ECE(electronics and communication engineering)
Application of Transformer in ECE(electronics and communication engineering)
 
Pramodlna
PramodlnaPramodlna
Pramodlna
 
Am transmitter
Am transmitterAm transmitter
Am transmitter
 
Radio frequency mems
Radio frequency memsRadio frequency mems
Radio frequency mems
 
RF_MEMS_A_Review_on_State_of_Art (1).pptx
RF_MEMS_A_Review_on_State_of_Art (1).pptxRF_MEMS_A_Review_on_State_of_Art (1).pptx
RF_MEMS_A_Review_on_State_of_Art (1).pptx
 
A 10 d bm 25 dbm, 0.363 mm2 two stage 130 nm rf cmos power amplifier
A 10 d bm 25 dbm, 0.363 mm2 two stage 130 nm rf cmos power amplifierA 10 d bm 25 dbm, 0.363 mm2 two stage 130 nm rf cmos power amplifier
A 10 d bm 25 dbm, 0.363 mm2 two stage 130 nm rf cmos power amplifier
 

Recently uploaded

KIT-601 Lecture Notes-UNIT-5.pdf Frame Works and Visualization
KIT-601 Lecture Notes-UNIT-5.pdf Frame Works and VisualizationKIT-601 Lecture Notes-UNIT-5.pdf Frame Works and Visualization
KIT-601 Lecture Notes-UNIT-5.pdf Frame Works and VisualizationDr. Radhey Shyam
 
Laundry management system project report.pdf
Laundry management system project report.pdfLaundry management system project report.pdf
Laundry management system project report.pdfKamal Acharya
 
Hall booking system project report .pdf
Hall booking system project report  .pdfHall booking system project report  .pdf
Hall booking system project report .pdfKamal Acharya
 
IT-601 Lecture Notes-UNIT-2.pdf Data Analysis
IT-601 Lecture Notes-UNIT-2.pdf Data AnalysisIT-601 Lecture Notes-UNIT-2.pdf Data Analysis
IT-601 Lecture Notes-UNIT-2.pdf Data AnalysisDr. Radhey Shyam
 
Democratizing Fuzzing at Scale by Abhishek Arya
Democratizing Fuzzing at Scale by Abhishek AryaDemocratizing Fuzzing at Scale by Abhishek Arya
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
 
Event Management System Vb Net Project Report.pdf
Event Management System Vb Net  Project Report.pdfEvent Management System Vb Net  Project Report.pdf
Event Management System Vb Net Project Report.pdfKamal Acharya
 
Introduction to Machine Learning Unit-4 Notes for II-II Mechanical Engineering
Introduction to Machine Learning Unit-4 Notes for II-II Mechanical EngineeringIntroduction to Machine Learning Unit-4 Notes for II-II Mechanical Engineering
Introduction to Machine Learning Unit-4 Notes for II-II Mechanical EngineeringC Sai Kiran
 
İTÜ CAD and Reverse Engineering Workshop
İTÜ CAD and Reverse Engineering WorkshopİTÜ CAD and Reverse Engineering Workshop
İTÜ CAD and Reverse Engineering WorkshopEmre Günaydın
 
A CASE STUDY ON ONLINE TICKET BOOKING SYSTEM PROJECT.pdf
A CASE STUDY ON ONLINE TICKET BOOKING SYSTEM PROJECT.pdfA CASE STUDY ON ONLINE TICKET BOOKING SYSTEM PROJECT.pdf
A CASE STUDY ON ONLINE TICKET BOOKING SYSTEM PROJECT.pdfKamal Acharya
 
RS Khurmi Machine Design Clutch and Brake Exercise Numerical Solutions
RS Khurmi Machine Design Clutch and Brake Exercise Numerical SolutionsRS Khurmi Machine Design Clutch and Brake Exercise Numerical Solutions
RS Khurmi Machine Design Clutch and Brake Exercise Numerical SolutionsAtif Razi
 
RESORT MANAGEMENT AND RESERVATION SYSTEM PROJECT REPORT.pdf
RESORT MANAGEMENT AND RESERVATION SYSTEM PROJECT REPORT.pdfRESORT MANAGEMENT AND RESERVATION SYSTEM PROJECT REPORT.pdf
RESORT MANAGEMENT AND RESERVATION SYSTEM PROJECT REPORT.pdfKamal Acharya
 
Online blood donation management system project.pdf
Online blood donation management system project.pdfOnline blood donation management system project.pdf
Online blood donation management system project.pdfKamal Acharya
 
Pharmacy management system project report..pdf
Pharmacy management system project report..pdfPharmacy management system project report..pdf
Pharmacy management system project report..pdfKamal Acharya
 
ONLINE VEHICLE RENTAL SYSTEM PROJECT REPORT.pdf
ONLINE VEHICLE RENTAL SYSTEM PROJECT REPORT.pdfONLINE VEHICLE RENTAL SYSTEM PROJECT REPORT.pdf
ONLINE VEHICLE RENTAL SYSTEM PROJECT REPORT.pdfKamal Acharya
 
Digital Signal Processing Lecture notes n.pdf
Digital Signal Processing Lecture notes n.pdfDigital Signal Processing Lecture notes n.pdf
Digital Signal Processing Lecture notes n.pdfAbrahamGadissa
 
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptx
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxCFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptx
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
 
KIT-601 Lecture Notes-UNIT-3.pdf Mining Data Stream
KIT-601 Lecture Notes-UNIT-3.pdf Mining Data StreamKIT-601 Lecture Notes-UNIT-3.pdf Mining Data Stream
KIT-601 Lecture Notes-UNIT-3.pdf Mining Data StreamDr. Radhey Shyam
 
2024 DevOps Pro Europe - Growing at the edge
2024 DevOps Pro Europe - Growing at the edge2024 DevOps Pro Europe - Growing at the edge
2024 DevOps Pro Europe - Growing at the edgePaco Orozco
 
Cloud-Computing_CSE311_Computer-Networking CSE GUB BD - Shahidul.pptx
Cloud-Computing_CSE311_Computer-Networking CSE GUB BD - Shahidul.pptxCloud-Computing_CSE311_Computer-Networking CSE GUB BD - Shahidul.pptx
Cloud-Computing_CSE311_Computer-Networking CSE GUB BD - Shahidul.pptxMd. Shahidul Islam Prodhan
 

Recently uploaded (20)

Standard Reomte Control Interface - Neometrix
Standard Reomte Control Interface - NeometrixStandard Reomte Control Interface - Neometrix
Standard Reomte Control Interface - Neometrix
 
KIT-601 Lecture Notes-UNIT-5.pdf Frame Works and Visualization
KIT-601 Lecture Notes-UNIT-5.pdf Frame Works and VisualizationKIT-601 Lecture Notes-UNIT-5.pdf Frame Works and Visualization
KIT-601 Lecture Notes-UNIT-5.pdf Frame Works and Visualization
 
Laundry management system project report.pdf
Laundry management system project report.pdfLaundry management system project report.pdf
Laundry management system project report.pdf
 
Hall booking system project report .pdf
Hall booking system project report  .pdfHall booking system project report  .pdf
Hall booking system project report .pdf
 
IT-601 Lecture Notes-UNIT-2.pdf Data Analysis
IT-601 Lecture Notes-UNIT-2.pdf Data AnalysisIT-601 Lecture Notes-UNIT-2.pdf Data Analysis
IT-601 Lecture Notes-UNIT-2.pdf Data Analysis
 
Democratizing Fuzzing at Scale by Abhishek Arya
Democratizing Fuzzing at Scale by Abhishek AryaDemocratizing Fuzzing at Scale by Abhishek Arya
Democratizing Fuzzing at Scale by Abhishek Arya
 
Event Management System Vb Net Project Report.pdf
Event Management System Vb Net  Project Report.pdfEvent Management System Vb Net  Project Report.pdf
Event Management System Vb Net Project Report.pdf
 
Introduction to Machine Learning Unit-4 Notes for II-II Mechanical Engineering
Introduction to Machine Learning Unit-4 Notes for II-II Mechanical EngineeringIntroduction to Machine Learning Unit-4 Notes for II-II Mechanical Engineering
Introduction to Machine Learning Unit-4 Notes for II-II Mechanical Engineering
 
İTÜ CAD and Reverse Engineering Workshop
İTÜ CAD and Reverse Engineering WorkshopİTÜ CAD and Reverse Engineering Workshop
İTÜ CAD and Reverse Engineering Workshop
 
A CASE STUDY ON ONLINE TICKET BOOKING SYSTEM PROJECT.pdf
A CASE STUDY ON ONLINE TICKET BOOKING SYSTEM PROJECT.pdfA CASE STUDY ON ONLINE TICKET BOOKING SYSTEM PROJECT.pdf
A CASE STUDY ON ONLINE TICKET BOOKING SYSTEM PROJECT.pdf
 
RS Khurmi Machine Design Clutch and Brake Exercise Numerical Solutions
RS Khurmi Machine Design Clutch and Brake Exercise Numerical SolutionsRS Khurmi Machine Design Clutch and Brake Exercise Numerical Solutions
RS Khurmi Machine Design Clutch and Brake Exercise Numerical Solutions
 
RESORT MANAGEMENT AND RESERVATION SYSTEM PROJECT REPORT.pdf
RESORT MANAGEMENT AND RESERVATION SYSTEM PROJECT REPORT.pdfRESORT MANAGEMENT AND RESERVATION SYSTEM PROJECT REPORT.pdf
RESORT MANAGEMENT AND RESERVATION SYSTEM PROJECT REPORT.pdf
 
Online blood donation management system project.pdf
Online blood donation management system project.pdfOnline blood donation management system project.pdf
Online blood donation management system project.pdf
 
Pharmacy management system project report..pdf
Pharmacy management system project report..pdfPharmacy management system project report..pdf
Pharmacy management system project report..pdf
 
ONLINE VEHICLE RENTAL SYSTEM PROJECT REPORT.pdf
ONLINE VEHICLE RENTAL SYSTEM PROJECT REPORT.pdfONLINE VEHICLE RENTAL SYSTEM PROJECT REPORT.pdf
ONLINE VEHICLE RENTAL SYSTEM PROJECT REPORT.pdf
 
Digital Signal Processing Lecture notes n.pdf
Digital Signal Processing Lecture notes n.pdfDigital Signal Processing Lecture notes n.pdf
Digital Signal Processing Lecture notes n.pdf
 
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptx
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxCFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptx
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptx
 
KIT-601 Lecture Notes-UNIT-3.pdf Mining Data Stream
KIT-601 Lecture Notes-UNIT-3.pdf Mining Data StreamKIT-601 Lecture Notes-UNIT-3.pdf Mining Data Stream
KIT-601 Lecture Notes-UNIT-3.pdf Mining Data Stream
 
2024 DevOps Pro Europe - Growing at the edge
2024 DevOps Pro Europe - Growing at the edge2024 DevOps Pro Europe - Growing at the edge
2024 DevOps Pro Europe - Growing at the edge
 
Cloud-Computing_CSE311_Computer-Networking CSE GUB BD - Shahidul.pptx
Cloud-Computing_CSE311_Computer-Networking CSE GUB BD - Shahidul.pptxCloud-Computing_CSE311_Computer-Networking CSE GUB BD - Shahidul.pptx
Cloud-Computing_CSE311_Computer-Networking CSE GUB BD - Shahidul.pptx
 

Presented by mueez akhtar Arain

  • 2.  A radio frequency power amplifier (RF power amplifier) is a type of electronic amplifier that converts a low-power radio-frequency signal into a higher power signal. Typically, RF power amplifiers drive the antenna of a transmitter. Design goals often include gain, power output, bandwidth, power efficiency, linearity (low signal compression at rated output), input and output impedance matching, and heat dissipation.  Contents  Amplifier classes  Applications
  • 3.  Amplifier classes:  Many modern RF amplifiers operate in different modes, called “classes”, to help achieve different design goals. Some classes are class A, class AB, class B, class C, which are considered the linear amplifier classes. In these classes the active device is used as a controlled current source. The bias at the input determines the class of the amplifier. A common trade-off in power amplifier design is the trade-off between efficiency and linearity. The previously named classes become more efficient, but less linear in the order they are listed. Operating the active device as a switch results in higher efficiency, theoretically up to 100%, but lower linearity.[1] Among the switch-mode classes are Class D, Class F and class E.[2] The Class D amplifier is not often used in RF applications, because the finite switching speed of the active devices and possible charge storage in saturation could lead to a large I-V product[1], which deteriorates efficiency.  Solid state  Modern RF power amplifiers use solid-state devices, predominantly MOSFETs (metal-oxide-semiconductor field-effect transistors).[3][4][5] The earliest MOSFET-based RF amplifiers date back to the mid-1960s.[6] Bipolar junction transistors were also commonly used in the past.
  • 4.  Applications:  The basic applications of the RF power amplifier include driving to another high power source, driving a transmitting antenna and exciting microwave cavity resonators. Among these applications, driving transmitter antennas is most well known. The transmitter–receivers are used not only for voice and data communication but also for weather sensing (in the form of a radar).[citation needed]  RF power amplifiers using LDMOS (laterally diffused MOSFET) are the most widely used power semiconductor
  • 5. INTRODUCTION: The radio frequency (RF) power amplifier (PA) is a key component in modern telecommunication systems since its power consumption dominates the other parts in the system. The purpose of the RF PA is to amplify the radio signal to a necessary power level for transmission to the receiver. The transmission is performed through the air. It is important to handle the PA's conflicting behaviors of efficiency and linearity in this process. RF PAs are divided into different classes, i.e. A, AB, B etc., with respect to their power efficiency. In RF PAs there is a trade-off between efficiency (defined as the ratio of the generated and consumed RF and DC powers, respectively) and linearity. High efficiency and high linearity cannot be achieved at the same time. Class A RF PAs belong to the group of weakly nonlinear systems [1]. The inherent nonlinearity of the PA causes interference with other transmitting channels and is something that one wants to avoid. Modern digital modulation techniques offer high data rates but use high bandwidths and peak-to-average ratios. Together with the nonlinear behavior of the PA, it enlarges the interference problem and leads to spreading of the transmitted spectrum which is often referred to as spectral regrowth. The only solution to the above problem is the use of linear PAs. The design of linear and efficient RF PAs in modern radio telecommunication systems has been described in the literature.
  • 6.
  • 7.
  • 8.
  • 9.
  • 10.
  • 11.  FM transmitter circuit and FM Radio using radio frequency tuned FM transmitter circuits it is base on the concept of electronic transmitter circuit where it has three basic components, there are oscillator circuit, form of modulation and power amplifier circuit. process is the transmitting frequency for broadcasting. The functions of variable capacitor are to match the proper frequency for broadcasting.  This FM Telephone Transmitter circuit is a combination of small circuits there are rectifier circuit, Fm oscillator circuit and power amplifier circuit. It is communicate to other people by radio frequency tower This kind of parts is important for life .  Transmitter antennas is most well known. The transmitter–receivers are used not only for voice and data communication but also for weather sensing (in the form of a radar).