A 20 dBm Linear RF Power Amplifier Using Stacked Silicon-on-Sapphire MOSFETs
A 20 dBm Linear RF Power Amplifier Using Stacked Silicon-on-Sapphire MOSFETs
复制标题
使用堆叠式蓝宝石硅 MOSFET 的 20 dBm 线性射频功率放大器
DOI:
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发表时间:
2006
影响因子:
3
通讯作者:
Dylan Kelly
中科院分区:
文献类型:
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作者:
Jinho Jeong;S. Pornpromlikit;Peter M. Asbeck;Dylan Kelly
In this letter, a fully integrated 20-dBm RF power amplifier (PA) is presented using 0.25-mum-gate silicon-on-sapphire metal-oxide-semiconductor field-effect transistors (MOSFETs). To overcome the low breakdown voltage limit of MOSFETs, a stacked FET structure is employed, where transistors are connected in series so that each output voltage swing is added in phase. By using triple-stacked FETs, the optimum load impedance for a 20-dBm PA increases to 50Omega, which is nine times higher than that of parallel FET topology for the same output power. Measurement of a single-stage linear PA shows small-signal gain of 17.1 dB and saturated output power of 21.0dBm with power added efficiency (PAE) of 44.0% at 1.88 GHz. With an IS-95 code division multiple access modulated signal, the PA shows an average output power of 16.3 dBm and PAE of 18.7% with adjacent channel power ratio below -42dBc