一种高性能2.4 GHz GaAs HBT类J功率放大器

Fifth International Conference on Computing, Communications and Networking Technologies (ICCCNT) Pub Date : 2014-07-11 DOI:10.1109/ICCCNT.2014.6963062

Tao Chen, Feng Wang, Xiaohong Sun, Jianhui Wu

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引用次数: 2

摘要

介绍了一种2.4 GHz GaAs HBT J类功率放大器。分析了GaAs HBT输出电容的非线性特性，提出了高性能功率放大器的负载阻抗设计要求。采用片外并联集总电容的非线性输出电容，提高了J类PA的性能。实现的2.4 GHz J类放大器的饱和输出功率为29.5 dBm，最大功率附加效率(PAE)为51.6%。与相同偏置的AB类放大器相比，输出功率提高了1.3 dB，最大PAE提高了9.2%。

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A high performance 2.4 GHz GaAs HBT class J power amplifier

A 2.4 GHz GaAs HBT Class J power amplifier (PA) was presented. This paper analyzed the nonlinear output capacitor character of GaAs HBT, and proposed the load impedance design requirement for high performance power amplifier. The nonlinear output capacitor of transistors with a paralleled lumped capacitor off chip was used to improve the performance of Class J PA. The implemented 2.4 GHz Class J PA shows a saturated output power of 29.5 dBm, with a maximum power added efficiency (PAE) of 51.6 %. Compared with the same biased Class AB PA, the output power is improved by 1.3 dB and the maximum PAE is enhanced by 9.2 %.

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Fifth International Conference on Computing, Communications and Networking Technologies (ICCCNT)

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