一种小型高性能 UHF 频段150W 放大器设计

摘要

This paper introduces the design and realization of a UHF-band 150 W amplifier.There are many kinds of transistor,so choosing appropriate transistor and matching circuit are important for amplifier design.In the design,in order to implement miniature and high efficiency,the intermediate-power high-efficiency wideband transmitter and line transformer are used to perform resistance matc-hing,and 3 dB bridge and balun line are used to perform dividing and combining.The miniature design is implemented for coupler and structure.A UHF-band 150 W amplifier is designed and debugged,the test results show that the efficiency surpasses 45%,the harmoni-zation is higher than 20 dBc,and the dimensions are less than 241 mm×106 mm×31 mm.%介绍了一种小型高性能 UHF 频段150 W 放大器的设计与实现。 UHF 频段功率管种类很多，选择合适的功率管和匹配电路形式是放大器设计的关键。设计过程中采用中功率的高效率宽带功率管，使用传输线变压器进行阻抗匹配，采用3 dB 电桥和巴伦线进行分合路，实现了小型化和高效率；并对耦合器、结构等进行了小型化设计。制作调试了 UHF频段150 W 放大器，测试结果效率优于45％，谐波优于20 dBc，尺寸小于241 mm×106 mm×31 mm。