4.5M earth station antenna, Satellite communication earth station antenna is one important aspect of antenna field. With the continuous development of satellite communication, technology of antenna used in satellite communication earth station has developed rapidly.

Firstly, it is development of antenna frequency. It develops from C-band to Ku-band. And it also opens satellite communication business at L, S, and X-band. Especially in recent years, it develops to EHP band, which is the milestone of antenna technology of satellite communication earth station. The typical case is that Antesky Science Technology Inc. takes the lead in researching and developing X-band small aperture antenna and L/S-band large aperture antenna successfully, which has been approved widely.

The start-up and popularization of spectrum multiplexing technology enables satellite communication antenna technology to break a new path in the aspects of polarization purity improvement, feed insertion loss reduction and antenna port isolation improvement.

 The original frequency expansion has made encouraging achievement. For example, C-band antenna of satellite communication earth station has transmitted and received from 500MHz to 575 MHz while Ku-band receiving bandwidth is developing from 500MHz to 1800MHz.

 Multi-frequency common feed technology's gradual mature has enabled C/Ku band to apply in project. 7.3M C&KU dual-band researched and produced by Antesky Science Technology Inc. has been sold out to European customers, and passed customer's serious test, which becomes the milestone in this industry.

 Multi-beam satellite communication earth station antenna enables a pair of antenna to independently transmit and receive some satellites simultaneously. In short, satellite communication earth station antenna has wider application because of development of satellite communication earth station antenna technology.

Generally speaking, the following aspects of new technology are worth talking about.

The initial satellite communication is confined to C band because it uses radio window transmitted by satellite communication wave in this band. The spring-up of radio industry enables C-band microwave interference seriously severe especially in the large and medium cities. And particularly in developed countries, it has become public hazard. Thus C-band microwave interference is developed. Moreover, Ku-band satellite communication earth station antenna can be built in cities due to decrease in size of absolute diameter, which reduces the cost of station building and the cost of microwave transmission line. Now people focus their effort on higher frequency development, for example, EHP band. Antesky is researching 20/40GHz satellite communication antenna.

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