Analysis and synthesis of a multi-arm conical spiral antenna to form shaped-conical radiation patterns

A multi-arm conical spiral wire antenna used in low orbit satellite communications is proposed, which can form cardio or conical patterns by adjusting its geometrical parameters. It has better polarization characteristic than the two-arm spiral antenna proposed in the reference. With the increase of its height and spiral constant its beam deviation from the axis increase while its power gain decrease to form conical radiation patterns. Several graphs about the influence of the parameters on radiation patterns are presented in this paper for the optimization of the antenna.