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AN APPROACH TO IMPLEMENT KAHN'S TECHNIQUE WITH DYNAMIC POWER SUPPLY

Kommu, Sowjanya
http://rave.ohiolink.edu/etdc/view?acc_num=wright1472221303

Abstract Details

2016, Master of Science in Electrical Engineering (MSEE), Wright State University, Electrical Engineering.
Radio-frequency power amplifiers are an integral part of today's communication systems. Primary importance is given to improve its efficiency and linearity, which are required for the effective signal transmission. Three main architectures on which, the efficiency of communication systems are based on are: (a) Kahn's technique, (b) Doherty's power amplifiers, and (c) Cheireix out-phasing modulation. Several schemes to implement these techniques exist in literature and their study is very diverse. In this thesis, a detailed literature survey on these techniques is presented, which includes their operation, properties, advantages, disadvantages, and areas of potential applications. This main objective of this thesis is to adopt the Kahn's architecture and implement the various electrical blocks using the latest technology. The main building blocks of the described architecture are: AM/PM signal generator, amplitude detector, dynamic power supply, and a radio-frequency power amplifier. The circuit operation, properties, and circuit-level implementation of all these blocks are presented. The design of a pulse-width modulated buck dc-ac converter used as a dynamic power supply is given. The amplitude-modulated Class-D radio-frequency power amplifier is designed and its performance is evaluated. Each of the circuit-level implementations of the various blocks were designed, built, and simulated on SABER circuit simulator. A test audio signal with frequency 2.5 kHz is generated in the AM/PM signal generator block. A buck dynamic power supply operates at a fixed supply voltage of 25 V with its output voltage varying between 3 V to 23 V. The Class-D radio-frequency power amplifier is designed to generate a carrier frequency of 250 kHz. The efficiency of each stage was determined.
Marian K. Kazimierczuk, Ph.D. (Advisor)
Saiyu Ren, Ph.D. (Committee Member)
Yan Zhuang, Ph.D. (Committee Member)
82 p.
Electrical Engineering
Dynamic Power Supply, Kahn Technique, RF power amplifier

Recommended Citations

Citations

  • Kommu, S. (2016). AN APPROACH TO IMPLEMENT KAHN'S TECHNIQUE WITH DYNAMIC POWER SUPPLY [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1472221303

    APA Style (7th edition)

  • Kommu, Sowjanya. AN APPROACH TO IMPLEMENT KAHN'S TECHNIQUE WITH DYNAMIC POWER SUPPLY. 2016. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1472221303.

    MLA Style (8th edition)

  • Kommu, Sowjanya. "AN APPROACH TO IMPLEMENT KAHN'S TECHNIQUE WITH DYNAMIC POWER SUPPLY." Master's thesis, Wright State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1472221303

    Chicago Manual of Style (17th edition)

wright1472221303
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© 2016, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.