基于变频模块的70 MHz制式卫星调制解调器设计

Design of 70 MHz Satellite Modem Based on Frequency Conversion Module

针对功放和高频头(Low Noise Block,LNB)本振频率分别为14062 MHz与12312 MHz的实际场景以及70 MHz制式卫星调制解调器和L波段卫星调制解调器互联互通的项目需求,设计了一种基于变频模块的70 MHz制式调制解调器。该设计在实现两种卫星调制解调器通信的同时,操作简单方便,不需要额外的接口转换,能够平稳运行于历次保障和演练任务。

Considering the scenario where the local oscillator frequencies of power amplifier and Low Noise Block(LNB)are 14062 MHz and 12312 MHz respectively,we design a 70 MHz satellite modem based on frequency conversion module.It can realize the interconnection between the 70 MHz satellite modem and L-band satellite modem and meet the needs of the project.This design makes the communication between two kinds of satellite modem and it is easy to operate the modem without extra interface conversion.So far,the system works well in previous drills and manoeuvres.