K 波段线性功率合成放大器的设计与研究.doc

K波段线性功率合成放大器的设计与研究
钟甦
(电子科技大学航空航天学院,四川成都611731)
摘要:毫米波放大器的设计已经越来越倾向于以具有体积小、重量轻、直流功耗低等优点的固态器件通过功率合成技术来实现。在成熟的波导T型合成结构基础上加以改进,实现了该放大器的合成效率高、尺寸小、易于散热、易于模块化等优点,再配合新研制出的一种具有幅度/相位特性补偿的预失真结构加以辅助,最终达到了在K波段高线性的功率输出。
关键词:功率合成; 模拟预失真; 毫米波; 功率放大器
中图分类号: 文献标识码:B
The Design and Research of a K-Band Linear bining Amplifier
ZHONG Su
(School of Aeronautics and Astronautics, University of Electronic Science and Technology of China, Chengdu 611731)
Abstract:It already has increasingly been inclined to that the design of millimeter-wave amplifier is realized through the technology of power synthesis by using the solid-state devices which are of the advantages of small volume, light weight, low DC power consumption, etc. On the basis of improving the posite structure of T-waveguide, the amplifier’s merits of high synthesis efficiency, small dimension, easy heat dissipation and easy modularization and so on are achieved. And bining with a new developed pre-distortion structure of possessing the pensation of amplitude/ phase plement each other, finally, the high linear power output on K-band is achieved.
Keywords:Power synthesis; Analog pre-distortion; Millimeter-wave; Power amplifier
0 引言
毫米波功率放大器是军用卫星通信系统中最为关键的部件,它决定了整个通信系统的作用距离和通信质量,其输出功率的大小以及线性度则是影响其性能最重要的指标。近年来,放大器的设计越来越倾向于以具有体积小,重量轻、直流功耗低等优点的固态器件通过功率合成技术来实现。然而,随着功率合成方式日趋成熟,单路功率放大器却不得不通过功率回退来保障线性度,这无疑降低了电源的利用率,增加了能耗,同时对器件也是一种浪费,还增加了设