Flexible and Adaptive Wideband Switching Power Amplifiers for Transmitters (PhD Thesis) (Record no. 361311)

MARC details
000 -LEADER
fixed length control field 02759nam a2200205Ia 4500
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 141124s2014||||xx |||||||||||||| ||eng||
022 ## - INTERNATIONAL STANDARD SERIAL NUMBER
ISSN-L phd
041 ## - LANGUAGE CODE
Language code of text/sound track or separate title English
082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER
Classification number 621.38412378242549183
Item number KHA
100 ## - MAIN ENTRY--PERSONAL NAME
Personal name Khan, Hashim Raza
Relator term author
245 #0 - TITLE STATEMENT
Title Flexible and Adaptive Wideband Switching Power Amplifiers for Transmitters (PhD Thesis)
260 ## - PUBLICATION, DISTRIBUTION, ETC.
Place of publication, distribution, etc. Karachi :
Name of publisher, distributor, etc. NED University of Engineering and Technology Department of Electrical Engineering,
Date of publication, distribution, etc. 2014
300 ## - PHYSICAL DESCRIPTION
Extent XI, 168 p.
Other physical details : ill
504 ## - BIBLIOGRAPHY, ETC. NOTE
Bibliography, etc. note Includes Bibliographical References
520 ## - SUMMARY, ETC.
Summary, etc. Abstract :<br/><br/>The research work presented in this thesis is focused on the design of flexible and reconfigurable switching power amplifiers for wireless communications. A novel topology of differential Class-E amplifier that uses capacitance with the LC balun to realize inductive impedance is presented. At the same time, the balun provides impedance transformation and incorporates the DC feed network as well to reduce the number of components. <br/><br/>Inverse Class-D is another class of switching amplifier investigated and designed during this research. Analysis showing the efficiency advantage of Class-D­¯¹ PA over Class-E PA and the maximum transistor size calculation for incorporating the drain capacitance in the output network are presented. <br/><br/>The novel topology of Class-E PA is exploited in RF Pulse Width Modulation based. power amplifier to achieve high efficiency over a wide dynamic range of input signal. Since the Class-E amplifier topology developed in this work requires only capacitors as design elements instead of inductor, it can be realized with tuneable capacitors that are high Q and area efficient components. RFPWM signal is generated by modulating the gate bias of the input inverter stage. Detailed analysis for gate bias vs. duty cycle shows that this technique can be used with polar modulation. <br/><br/>To validate the concepts, several prototypes have been implemented from IBM in 130 nm CMOS technology and measured. The differential Class-E PA with series capacitance with the load delivers an output power of 22 dBm at 2.4 GHz from a 2.5 V supply achieving a PAE of 38%. The fully integrated Class-D­¯¹PA delivers 26.8 dBm power at 1.8 GHz from 2.5 V supply achieving 45% PAE. The RF-PWM design delivers 24.8 dBm power at 1.8 GHz from 2 V DC supply achieving 38% PAE. The PAE decreases to 37% when Pa is reduced to 18.2 dBm. <br/><br/>Thus, Class-EPA with the capacitor based matching network for RF-PWM provides an easy mechanism to achieve a wide range of power over a broad frequency bandwidth with high average efficiency.
650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element Impedance Matching Thesis
9 (RLIN) 882851
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element Amplifiers Radio Frequency Thesis
9 (RLIN) 673545
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element Power Amplifiers Thesis
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type PHD Thesis
Source of classification or shelving scheme Dewey Decimal Classification
Holdings
Withdrawn status Lost status Damaged status Not for loan Home library Current library Shelving location Date acquired Stock Type Total Checkouts Full call number Barcode Date last seen Accession Date Koha item type
        Government Document Section Government Document Section Govt Publication Section 20/10/2022 Donation   621.38412378242549183 KHA 93788 20/10/2022 24/11/2014 Reference Collection
        Government Document Section Government Document Section Govt Publication Section 20/10/2022 Donation   621.38412378242549183 KHA 93789 20/10/2022 24/11/2014 Reference Collection