摘要
报道了Ku波段30W脉冲微波功率放大器模块的研制.模块的微波放大链路由5级固态功率器件级联构成,采用新颖的双层腔体结构,消除了低频电路与高频电路的互扰.针对Ku波段内匹配MESFET设计了双段式偏置电路,有效抑制了低频振荡.在脉冲重复频率3kHz,占空比10%下,模块在13.5-14.0GHz工作频段内的功率增益GP≥44dB,输出脉冲峰值功率Ppk≥30W,总效率η≥13%（A类放大状态）.
This paper reports the design and performance of a pulsed microwave power amplifier module that uses microstrip lines and five-stage solid-state devices. A novel two-layer chamber structure is designed for the cancellation of crosstalk between low-fre- quency circuits and high-frequency circuits. A two-section bias circuit for the GaAs internally matched MESFETs is presented, with which the low-frequency oscillations can be suppressed effectively. When operating over 13.5～14.0GHz at a duty cycle of 10% with 3kHz pulse repetition frequency, the power amplifier module shows a power gain of Gp≥44dB, an output pulsed peak power of Ppk≥30W, and a total efficiency of η≥13% （class A power amplification）.
