Far-Field Radiation Patterns of a Cylindrical Dielectric Resonator Antenna

Abstract

In this work, far-zone radiation patterns of a Cylindrical Dielectric Resonator Antenna (CDRA) are theoretically investigated. A combination of perfect and imperfect magnetic wall models is applied here to find the far-zone electric fields. The sidewall of the CDRA is modeled here as an Imperfect Magnetic Conductor (IPMC), and the bottom and top walls are assumed as PMC (perfect magnetic conductor) to find the TE and TM mode generating eigenfunctions. The equivalence principle is used to find the surface currents (electric and magnetic) on top, bottom, and side walls of the CDRA. Finally, the far-field radiation pattern is computed from the electric and magnetic surface currents. For simplicity, only the fundamental HEM111 mode is focused. Theoretically computed results are compared with simulated data (HFSS) to show the correctness of our theory