大功率SSPA可变输出匹配电路的可行性

Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI:10.1109/RAWCON.2002.1030149

A.C. Cotler, E. R. Brown

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引用次数: 8

摘要

本文分析了一种利用由可切换串联电感和并联电容组组成的可变变压器电路实现100w级固态功率放大器(SSPA)输出阻抗与负载匹配的新技术。采用大信号时域工具(Saber/spl / reg/)对匹配电路进行建模，结果表明，与固定匹配电路相比，相对于输入和输出功率而言，功率附加效率可以得到更高的水平。例如，在ab类基于ld - mosfet的SSPA中，设计为/spl sim/110 W输出时的60% PAE，可变匹配电路允许/spl sim/50% PAE降低到约20 W输出，而固定匹配电路的PAE约为25%。

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The feasibility of a variable output matching circuit in a high-power SSPA

This paper analyzes a new technique for matching the output impedance of a 100-W-class solid-state power amplifier (SSPA) to a load using a variable transformer circuit consisting of switchable series-inductor and shunt-capacitor banks. A large-signal time-domain tool (Saber/spl reg/) is adapted to model the matching circuit and shows that the power-added efficiency can be made much more level with respect to input and output power than in a fixed matching circuit. For example, in a class-AB LD-MOSFET-based SSPA designed for 60% PAE at /spl sim/110 W output, the variable matching circuit allows for /spl sim/50% PAE down to about 20 W output, compared to about 25% PAE from a fixed matching circuit.

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Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)

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