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.