Radiation and reception characteristics of an oblate spheroidal antenna for electron plasma waves 1. Theory

Authors

  • Shigeo Ohnuki,

  • Saburo Adachi


Abstract

Unified theory on the radiation and reception characteristics of the oblate spheroidal antenna with an ion sheath or an absorptive surface for an electron plasma wave is presented. The analysis is carried out as a boundary-value problem by using oblate spheroidal functions. The formulas for the radiation and reception characteristics such as the radiation impedance, electron charge distributions, radiated wave potential, directional properties, and receiving voltage of the oblate spheroidal antenna are analytically obtained. It is shown that the theory is applicable to monopole-type plasma wave antennas, such as disk, sphere or thin rod with sheaths in general, depending upon the applied d.c. bias.

Ancillary