由于传输介质的不同，使得水声通信具有一些有别于电磁波通信的特点。
The characteristics of underwater acoustic communication are different from wireless communication because of different propagation media.
微波移相器是能改变电磁波相位的器件，广泛应用在相控阵雷达和微波通信系统中。
Microwave phase shifter is a device that can change the phase of electromagnetic wave. It is widely used in the phase array radar and microwave communications systems.
本文通过求解雷达散射截面得到了无源电磁散射板应用于微波接力通信中的电磁波传播参数。
Electromagnetic wave propagation parameters of passive scattering planes used in microwave radio relays are given by applying the method of solving the radar cross section (RCS).
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