Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (10): 19-23.doi: 10.3969/j.issn.1000-565X.2010.10.004

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Power-Combining Amplifier Based on Double-Layer Planar Circuit

Yan Jun-mei  Chu Qing-xin  Gong Zhi   

  1. School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2009-12-25 Revised:2010-03-01 Online:2010-10-25 Published:2010-10-25
  • Contact: 严君美（1974-），男，博士，主要从事功率合成技术研究． E-mail:junmei．yan@mail．seut．edu．cn
  • About author:严君美（1974-），男，博士，主要从事功率合成技术研究．
  • Supported by:

    国家自然科学基金资助项目（60801033）; 广东省自然科学基金资助项目（071180601）

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Abstract:

In order to improve the performances of planar power-combining amplifiers,a power-combining amplifier based on the double-layer planar circuit is designed,which employs a double-layer planar power divider/combiner to improve the integration degree,introduces a right-angle microstrip bend to place the amplifiers and their biasing elements on the sides of the input-output axis to make enough room,and locates the amplifiers on the two sides of the input-output axis for heat dissipation.Afterwards,a four-path power divider and a four-element power-combining amplifier are designed,fabricated and tested.The results show that the proposed power-combining amplifier is of a small-signal gain of 10~16 dB over a wide bandwidth of 2.0~4.5 GHz,a saturated output power of 25.9 dBm at 3 GHz and a power-combining efficiency of 81%.It is thus concluded that the proposed design method is feasible.

Key words: parallel double trip line, double-layer planar circuit, power divider, power combiner, power amplifier