1.前言在卫星通信中,按照有效利用频谱的观点,提出了发信、收信两者都同时采用正交的两个极化波的频谱复用方式。如若这种方式能够实现,则可以在相同频带下使通信容量增加一倍,并认为它在卫星通信中具有很大的经济意义。再从有效利用通信卫星静止轨道的观点来考察一下这种方式,由于国际卫星通信量显著增加,各国也规划用通信卫星建立国内卫星通信网,这就意味着卫星静止轨道的利用要设法做到合理和有效,而且要进行传送大容量信息时这也是必须考虑的一个问题。当在卫星通信中,实现频谱复用方式时,是采用圆极化有利还是采用线极化有利的问题 1. Preface In the satellite communications, in accordance with the effective use of the spectrum point of view, put forward the letter, the receiver both use orthogonal two polarized wave spectrum multiplexing. If this approach is to be achieved, then the capacity of the communication can be doubled in the same frequency band and considered to be of great economic importance in satellite communications. Considering this way from the perspective of effectively using the orbit of communications satellites, various countries also plan to establish domestic satellite communications networks with communications satellites due to the significant increase in international satellite communications, which means that the utilization of satellite geostationary orbit should be managed Reasonable and effective, but also for the transmission of large-capacity information, which is also a question that must be considered. When implementing spectral multiplexing in satellite communications, the question of whether it is advantageous to use circular polarization or linear polarization