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毫米波系统具有下列特点:1.与微波系统相比,用小口径天线就可以得到锐利的方向性。2.易于在小带宽比内传送宽频带信号。3.可用窄脉冲宽度得到高的距离分辩率。4.随着频率的增高,以相同的相对速度可以得到很大的多普勒频移。但是,如果降雨衰减很大,为了确保线路可靠,需要缩短传送距离。然而在实用方面由于天线和高频电路可做得小而轻,因此发展便于搬运的机器是可能的。
Millimeter wave system has the following characteristics: 1. Compared with the microwave system, with a small aperture antenna can get sharp directionality. 2. Easy to transmit broadband signals within a small bandwidth ratio. 3. Narrow pulse width can be used to obtain a high resolution of the distance. 4. As the frequency increases, a large Doppler shift can be obtained with the same relative speed. However, if the rainfall is dampening, the transmission distance needs to be shortened in order to ensure a reliable route. However, in practical terms, since antennas and high frequency circuits can be made small and light, it is possible to develop a machine that is easy to handle.