| Microwave communication is an advanced technology for its high capacity, good transmissionquality, stability, reliability and economical feature etc. For a long time, microwavecommunication technical is a important member in communications families. However, with thefast development of new technologies and increasing.~ demand from the markets, theelectromagnetic environment of telecommunications and inter-system interference are gettingmore and more complex and serious. Solving such problems is becoming an urgent task. Besidesthe effective means of administration and reasonable spectrum allocation and assignment, the bestway to have such issues settled is Electromagnetic Compatibility (EMC) analyses.The research work for EMC has begun at the 19 century, but it was later in China. Especial inmicrowave telecommunications, the computer software for EMC engineering can be hardly foundhere. In this article, the principle for microwave inter-system interference and the interferencefrom radar is reviewed. By using Visual C++, a practical software for EMC analysis in microwaveinter-systems and from radar to microwave among 1-40GHz is completed, which was developedin Windows'95 environment. This work has filled the blank of EMC analysis software formicrowave communications in China.
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