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A four-arm conical spiral antenna with arbitrary configuration and excited by different modes is analyzed by the method of moments. Both Archimedean and equiangular spiral antennas are unified in its coordinate equation. The results show that backfire and endure shaped-conical beams can be obtained by different exciting types. The relationship between its radiation characteristics and winding denseness...
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...
The conical beam forming characteristics of a two-arm and a four-arm conical spiral antenna with arbitrary configuration are researched in this paper. The antennas are analyzed based on the Nakano integral equation and the moment method. The results show that their beam direction can be changed by adjusting the winding denseness of the antennas. With the increase of the winding denseness their beam...
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