A simple design method of feed cluster on the array-fed reflector type multiple spot beam antenna

摘要

A simple design method of feed cluster on the array-fed reflector type multiple spot beam antenna using Gaussian beam approximation is shown. The method can easily evaluate not only the antenna peak gain but also the cross over lebel of adjacent beams. In the approximate equation, all the design parameters including a reflector and feeds can be represented by a single parameter it, so the derived equation is general and transparent. In comparison with the accurate result, the obtained gain level is a little bit higher, however, the result represents the behaviour of the design parameter well and the validity is verified.