Simple low-cost, subsystem fabrication

Hong Zhi Liu, Hou Kuei Huang, Chih Cheng Wang, Ray Jay Chiu, Che Hung Lin, Chen Kuo Chu, Mau Phon Houng, Yeong Her Wang, Ching Hsueh Chang, Chang Luen Wu, Chian Sern Chang

Research output: Contribution to journalArticlepeer-review


An overview is given of a simple and low-cost 1.9-GHz, 25-W power amplifier developed using only one prematched 50-mm PHEMT with external matching circuits on a FR-4 PCB. As the output stage integrated with other driver stages and dc control circuits, a complete four-stage power-amplifier subsystem is also demonstrated. When operating at 38.5-dBm output power with π/4-DQPSK signal, the power-amplifier subsystem shows low distortion, with better than 75-dBc ACPR at 600 kHz and 79-dBc ACPR at 900 kHz offset from the center frequency, and is suitable for PHS 500-mW base-station applications.

Original languageEnglish
Pages (from-to)12-17
Number of pages6
JournalIEEE Circuits and Devices Magazine
Issue number4
Publication statusPublished - 2005 Jul

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Electrical and Electronic Engineering

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