Abstract
AbstractA monopole antenna consisting of a body of revolution is given by a set of simultaneous equations on the rotationally symmetric surface current of a conductor separated with respect to the variable of the envelope length on the surface of the body of revolution and the variable in the rotating direction. The structure is analyzed in detail by means of an extended moment method based on the present theory.As an application, this analysis is applied to a conical monopole antenna. Studies are performed to find body shapes providing broadband characteristics. It is found that antennas with cross sections approximated by straight lines, ellipses and circles have an impedance of 50 ω over a wide range of frequency. When these shapes are replaced with wire elements for analysis, 16 elements are found sufficient to provide the characteristics for the bodies of revolution. Theoretical calculations and experimental results are compared. Agreement is excellent and the method is found useful.
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