| VHF频段通信系统中功率放大器的设计 |
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| 引用本文： | 赵明菊,高永安.VHF频段通信系统中功率放大器的设计[J].半导体技术,2011(8):631-634. |
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| 作者姓名： | 赵明菊 高永安 |
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| 作者单位： | 杭州电子科技大学电子信息学院,杭州,310018;中国电子科技集团公司第五十研究所,上海,200063 |
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| 摘 要： | 设计了一款甚高频(VHF)波段功率放大器电路。该功率放大器使用MOS管BLF244的推挽式结构,采用集电极负反馈偏置技术和集总元件、传输线变压器混合匹配电路进行实现。使用集电极负反馈技术确保功率放大器的稳定性,使其线性度得以提高;同时使用电抗元件以增加带宽;另外使用传输线变压器进行平衡与非平衡之间的转换,且进一步拓宽频带宽度。最后,对功率放大器进行测试,测试的结果完全达到系统设计要求的性能指标,并有所提高,具有较强的实用性。
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| 关 键 词： | 甚高频频段 推挽式功率放大器 集电极负反馈 匹配电路 自动增益控制(AGC) |
Design of VHF-Band Power Amplifier in Communication System |
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| Zhao Mingju,Gao Yongan.Design of VHF-Band Power Amplifier in Communication System[J].Semiconductor Technology,2011(8):631-634. |
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| Authors: | Zhao Mingju Gao Yongan |
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| Affiliation: | 1.School of Electronics Information,Hangzhou Dianzi University,Hangzhou 310018,China;2.The 50th Research Institute,CETC,Shanghai 200063,China) |
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| Abstract: | A VHF-band power amplifier(VHF PA) circuit was designed.In this amplifier,the push-pull structure formed by MOSFET BLF244,collector negative-feedback technology,lumped element and transmission line transformers matching circuits were used.The use of the collector negative-feedback technology ensured the stability of the PA,and got higher linearity,at the same time using reactance components increased the bandwidth.Furthermore,transmission line transformers can undertake conversion between balance and unbalance,and also can broaden the bandwidth.The final test shows that its performance completely meets and even exceeds the design requirements of the system,and it has a strong practical applicability. |
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| Keywords: | very high frequency (VHF)-band push-pull amplifier collector negative feedback matching circuit automatic gain control(AGC) |
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