摘要
针对EHF频段卫星通信对固态高功率需求问题,提出一种空间功率合成放大器的设计方案,基于BJ400标准波导的波导T型结功率分配/合成器、H面波导3 dB分支线电桥和波导-微带探针变换相结合的合成高效、结构紧密的空间功率合成。借助三维电磁仿真软件HFSS对无源网络进行仿真优化,依托精密的机械加工技术,进而实现了8路功率合成。驱动功放和末级功放均采用GaAs MMIC功放芯片,实现最小10 W的连续波功率输出。测试结果表明,在EHF频段43~45GHz范围内,1 dB压缩点输出功率最小达到10 W,合成效率高于80%,在该频段上实现了高效率合成和大功率输出。此方案的结构具有尺寸容差大、易于制造和方便散热的特点,在工程应用中有很大的前景。
For the requirement of high-power solid-state amplifier in satellite communication,this paper presents an EHF band spatially power combined amplifier.It is a compact high-efficiency spatial power combining system based on WR22 waveguide T-junction power divider/combiner,waveguide hybrid and waveguide micro-strip probe transition.The proposed passive structure is simulated and optimized by 3D field EM software HFSS.Using precision machining process,an 8-way power combining structure is achieved.The GaAs MMICs are used in both driver amplifier and final amplifier ,which implement at least 10 W CW power output.The test results show that the output power of at least 10 W at the 1 dB compressed point can be achieved with high efficiency of more than 80% in EHF band of 43- 45 GHz.The design has advantages of large tolerance ,ease of manufacture, good heat dissipation and so on,and has broad prospects in engineering application.
出处
《无线电工程》
2016年第12期78-82,共5页
Radio Engineering
基金
国家部委基金资助项目
