G. Drossos

Two-element broadside arrays using cylindrical dielectric resonator antennas

The radiation from two different broadside dielectric resonator antenna arrays, shaping the Eθ and Eϕ field components, has been theoretically modeled and experimentally verified. The gains of the two arrays have been increased by factors of 2.6 and 1.6, respectively, compared with the gain of a single DRA. However, the impedance bandwidth has been reduced by a factor of 2.3 with respect to the bandwidth of a single DRA. Good agreement exists between the theoretical and experimental results.

Linear and circular polarised cylindrical dielectric resonator antennas

A circular polarised and a switchable cylindrical dielectric resonator antenna are reported. The switchable antenna provides two linear polarised, one circular polarised, and a non-radiating mode. The experimental results of the resonant frequency, boresight axial ratio, gain, unloaded Q-factor, impedance bandwidth and radiation efficiency for both the antennas are presented and compared with the theoretical values.