Design investigation of DRA array fed by Dielectric Image Line

In this paper new arrays including three elements of Rectangular Dielectric Resonator Antenna (RDRA) fed by Dielectric Image Line (DIL) through a narrow slot is numerically investigated. For a single elements antenna maximum gain of 7.7 dB with a high level of backward radiation at 10 GHz is obtained. Techniques including adding sidewalls, adding reflector and using a metal box is performed to enhance antenna array gain and obtain low backward radiation. In case of using metal box, maximum gain of 11.5 dB with a maximum backward radiation of 22 dB is obtained.