Cylindrical dielectric resonator antenna fed by a stair slot in the ground plane of a microstripline

A novel coupling scheme to cylindrical dielectric resonator antenna is proposed and investigated. In particular, coupling to the resonator is achieved by simple slot firstly and a stair slot secondly exited by a microstrip line. The objectives of this change are to maximize the coupling, increase the gain and miniaturize the structure antenna, achieve resonance at the desired frequency. An approximate and quick design approach is given followed by more accurate design and analysis using commercial software. The antenna was fabricated and tested. Measurements match well with simulation results.