A 18 GHz Broadband Stacked FET Power Amplifier Using 130 nm Metamorphic HEMTs

被引:13
作者
Lee, Choonghee [1 ]
Kim, Youngmin [1 ]
Koh, Yumin [3 ]
Kim, Jihoon [1 ]
Seo, Kwangseok [3 ]
Jeong, Jinho [2 ]
Kwon, Youngwoo [1 ]
机构
[1] Seoul Natl Univ, Inst New Media & Commun, Sch Elect Engn & Comp Sci, Seoul 151742, South Korea
[2] Kwangwoon Univ, Dept Elect & Commun Engn, Seoul 139701, South Korea
[3] Seoul Natl Univ, Interuniv Semicond Res Ctr, Sch Elect Engn & Comp Sci, Seoul 151742, South Korea
关键词
Metamorphic high electron mobility transistor (mHEMT); power amplifier (PA); stacked field effect transistor (FET);
D O I
10.1109/LMWC.2009.2033533
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A broadband power amplifier (PA) with a 3 dB power bandwidth of 72% is presented using metamorphic high electron mobility transistors (mHEMTs). A stacked FET structure, where transistors are series connected to combine voltage swings, is employed to overcome relatively low breakdown voltages of mHEMTs. Series-connected PA's show much higher load impedance compared to the parallel combined transistors, which allows output matching to be realized in the low quality (Q)-factor region, providing the broadband performance. The fabricated PA using quadruple-stacked 130 nm mHEMTs has a gain of 21.2 dB and saturated output power of 26.4 dBm with power added efficiency (PAE) of 33% at the design frequency of 18 GHz. The 3 dB output power bandwidth is from 10 to 23 GHz.
引用
收藏
页码:828 / 830
页数:3
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