摘要
基于行波式和负反馈相结合的混合式宽带微波放大器电路结构,使用无封装GaAsPHEMT管芯,完成了1~8GHz微波宽频带放大器的研制。根据有耗匹配理论优化设计了放大器的输入输出匹配电路,以获取电路最佳宽带特性,并由器件模型等效参数对放大器进行了小信号仿真。研制的放大器在直流偏置为9V,电流为110mA的情况下,工作频带内测试的结果为:P-1为18dBm,增益波动为±1.0dB,带内VSWR〈2.8,与仿真结果吻合较好,表明电路方案可行,可完全满足相关系统需要。
A 1-8 GHz broad-band microwave power amplifier with non-packaged PHEMT FET is developed. This amplifier is based on traveling-wave and negative-feedback hybrid topology configuration. Using microwave simulation tools,the input and output lossy match circuits are optimized, and the small signal equivalent parameters circuits are simulated to obtain the best wide-hand properties. At a bias supply of q-9 V @ 110 mA, the amplifier achieves an output power of 18 dBm (P-1) with a gain variation of ± 1.0 dB and the VSWR〈2. 8 over the operating band, the coincident results of simulation and measurement validate the design, and satisfy the requirements for the practical system.
出处
《电子测量技术》
2008年第2期73-75,86,共4页
Electronic Measurement Technology
关键词
宽频带
行波
负反馈
匹配
wide-band
traveling-wave
negative feedback
match
作者简介
陈昌明,男,1971年出生,四川人,讲师,硕士研究生,主要研究方向为微波及毫米波电路方面。E-mail:ccml_ming@126.com