2~6 GHz Wideband GaN HEMT Power Amplifier MMIC Using a Modified All-Pass Filter

수정된 전역통과 필터를 이용한 2~6 GHz 광대역 GaN HEMT 전력증폭기 MMIC

Lee, Sang-Kyung;Kim, Dong-Wook

  • Received : 2015.06.24
  • Accepted : 2015.06.30
  • Published : 2015.07.30


In this paper, a 2~6 GHz wideband GaN power amplifier MMIC is designed and fabricated using a second-order all-pass filter for input impedance matching and an LC parallel resonant circuit for minimizing an output reactance component of the transistor. The second-order all-pass filter used for wideband lossy matching is modified in an asymmetric configuration to compensate the effect of channel resistance of the GaN transistor. The power amplifier MMIC chip that is fabricated using a $0.25{\mu}m$ GaN HEMT foundry process of Win Semiconductors, Corp. is $2.6mm{\times}1.3mm$ and shows a flat linear gain of about 13 dB and input return loss of larger than 10 dB. Under a saturated power mode, it also shows output power of 38.6~39.8 dBm and a power-added efficiency of 31.3~43.4 % in 2 to 6 GHz.


GaN;HEMT;Power Amplifier;MMIC;Lossy Matching;All-Pass Filter


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Supported by : 국방과학연구소