Circularly polarised dielectric resonator antenna

Abstract

A circularly polarised dielectric resonator antenna is reported. The circular polarisation is obtained by exciting the two orthogonal HE11δ modes of a cylindrical ring dielectric resonator in phase-quadrature. Measured results show that the antenna has an axial ratio of less than 3 dB over a beam width of 100° with a minimum value of ~0.5 dB in this range.