University of Twente Student Theses


The design of a new power combining technique for the RF power amplifiers

Cheng, W. (2006) The design of a new power combining technique for the RF power amplifiers.

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Abstract:The wireless communication market has grown tremendously in the last decade. As a crucial block in the wireless system, the power amplifier is generally realized in dedicated and hence expensive technologies. To decrease the overall cost and size of the communication devices the power amplifier is aimed to be implemented in the mainstream digital technology: CMOS. The low breakdown voltage of the transistor in the CMOS process makes it challenging to design the power amplifier with high output power. A new power combining technique based on the parallel quarter-wavelength transmission lines has been proposed and explored to overcome this problem. By combining the output power from multiple power amplifiers the total available output power can be increased. It also has the potential for the power control application and overall reliability improvement. The simulation results of several design examples present the verification for the theoretical analysis of the proposed power combining technique. After thorough analysis of the nonidealities of the proposed power combining technique, the practical issues regarding the microstrip implementation of the combining network are discussed. The measures to minimize the layout discontinuities of the microstrip combining network have been presented in a design example
Item Type:Essay (Master)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:54 computer science
Programme:Electrical Engineering MSc (60353)
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