SMALL DEPLOYABLE UHF CIRCULARLY-POLARIZED CROSSED DIPOLE ANTENNA

摘要

A small satellite-deployable antenna includes a half-wavelength box-shaped structure having a top conducting surface, a bottom conducting surface, and a non-conducting layer positioned between the top and bottom surfaces, and four tilted crossed quarter-wavelength dipoles positioned on the top surface, each having an antenna element attached thereto and spaced about a quarter wavelength apart with respective phases of about 0°, 90°, 180°, 270°. The antenna when deployed has its small ground plane isolated from the rest of the satellite structure, thereby enabling it to direct the circularly polarized radiation in a pattern ideal for ground coverage.