基于连续模FV类的VHF频段放大器设计  

VHF Band Power Amplifier Design Based on Continuous FV Mode

作　　者：陈炽[1] 陈伟伟 王程[1] 朱光耀[1] 苏璞 汪蕾[1] CHEN Chi;CHEN Weiwei;WANG Cheng;ZHU Guangyao;SU Pu;WANG Lei(China Academy of Space Technology(Xi’an ),Xi’an 710000,China)

机构地区：[1]中国空间技术研究院西安分院,西安710000

出　　处：《空间电子技术》2019年第2期5-9,82,共6页Space Electronic Technology

摘　　要：文章利用CREE公司的CGH40006P,完成了VHF频段高效放大器设计,该设计不同于此频段的通常设计方法。设计中,基于连续模放大器FV模式的设计理论,在F类放大器偏置条件和基波阻抗的基础上,通过改变时域电压的波形,得到了连续模FV类模式下的阻抗条件。利用微波波形工程的方法,通过仿真,完成了放大器输出电压电流波形、动态负载线的设计控制以及对应的微波大信号特性。通过空气绕制电感、高Q射频电容及微带线,完成基波、二次谐波和三次谐波的匹配。在165MHz连续波输出情况下,放大器输出功率为39dBm,增益为26dB,功率附加效率为81%。在150MHz～200MHz、 28%的相对带宽内,最大功率为39.1dBm;在全频带内,功率附加效率大于65%,最大功率附加效率为87.9%。在-40℃～+70℃温度范围内,放大器的输出功率及功率增益差别小于0.15dB。This paper present the design of a VHF band power amplifier. The design method is continuous class-FV mode different from the common VHF band power amplifiers. Based on Class F bias condition and fundamental impedance, the class-FV mode impedances are gotten by changing the voltage waveform equation. With microwave waveform engineering methodology, the output voltage and current waveforms are controlled, and the microwave performances are simulated. Harmonic impedances are realized by the air-coil inductor, high Q RF capacitor and microstrip stub. At a frequency of 165MHz and CW operating condition, the amplifier achieved output power of 39 dBm with power gain of 26dB and power-added efficiency 81%. In 28.5% relative frequency band, the maximum output power are 39.1dBm and the maximum power-added efficiency is 87.9%. In the range -40℃^+70℃, the output power and power gain are less than 0.15dB.

关 键 词：VHF频段 连续模FV类 高效率 

分 类 号：V474[航空宇航科学与技术—飞行器设计]