超短波通信系统射频兼容设计与原理性验证

Compatibility Design and Principle Verification of Ultrashort Wave Communication System

针对超短波通信系统邻近通道工作时对主频干扰与宽带噪声干扰的抑制需求,综合考虑系统收发应用,提出了一种采用捷变频射频滤波技术和射频干扰对消技术的射频兼容工作方法,并研制出射频兼容设备验证样机。经验证测试,该系统可同时抑制主频干扰与宽带噪声干扰,对接收通信中心频率3 MHz外的主频信号实现30 dB的抑制,对接收频点的宽带噪声信号实现不小于45 dB的抑制,有效提升超短波通信链路兼容工作频率间隔和通信效能,也可扩展用于其他类似射频系统内兼容工作设计。

According to the ultrashort wave communication system’s requirement of dominant frequency suppression and wide-band noise suppression,a compatible solution which has comprehensively considered the system’s sending and receiving application is suggested.This solution uses frequency-agility RF filter and RF interference cancellation technology,and an equipment is designed.This equipment can suppress dominant frequency interference and wide-band interference simultaneously.It suppresses dominant frequency interference 30 dB with 3 MHz frequency interval,and wide-band noise more than 45 dB in receive frequency.The RF compatible equipment system shows proper performance at co-work frequency interval and communication ability by laboratory measurement.This compatible method can also be used for other RF system’s compatibility design.