UHF频段模拟卫星转发器的设计

Design of UHF Satellite Communications Simulate Transponder

为了在实验室内开展卫星通信体制以及新技术的研究,采用微波锁相频率合成器、L波段同轴腔体滤波器、UHF波段腔体滤波器和射频混频器相结合的方案研制了UHF波段上下变频器组件。实现了输入带宽10 MHz的UHF波段上下变频器构成的模拟转发器,设计了L波段同轴腔滤波器,并对上下通道的幅频特性和相频特性进行了测试。

In order to develop the system of satellite communication and its new technology in the laboratory, an S-Ku band up-conversion and down-conversion sections is designed by the combination of microwave PLL synthesizer, S band cavity filter, Ku band cavity filter and RF mixer in this paper. 30 MHz bandwidth for the input signal of simulate transponder is realized. Furthermore, an S band coaxial cavity filter is proposed, and the amplitude-frequency characteristic and phase-frequency characteristic of up-link and down-link are tested.