Geometry perturbation of dielectric resonator for same frequency operation as radiator and filter

A single dielectric resonator is used for a dual functional application using the geometry perturbation method at the desired frequency. The high Q TE 01δ mode for a filter operation and the low Q TM 01δ mode for radiation at the same frequency. To operate both modes at the same frequency a circular metallic disk is used to control the energy concentrations of the modes inside the dielectric resonator. In addition, a metal disk is used to provide partial shielding for the TE 01δ mode and allow the TM 01δ mode radiation and at the same time enhance the insertion loss and matching. The design is made for Wi-Fi applications at 2.45 GHz.