RADIATION CHARACTERISTICS OF A CYLINDRICAL DIELECTRIC RESONATOR ANTENNA OPERATING AT HE(21-DELTA)

The radiation from a cylindrical dielectric resonator antenna (DRA) ex cited at the HE(21 delta) mode by a coaxial probe is theoretically for mulated and experimentally investigated. Assuming magnetic-wall bounda ry conditions, equations for the electric field components in the far- field region are derived for the first time. The dependence of the rad iation pattern and directivity on the dimensions of the cylinder are d iscussed. The gain of the DRA operating at the HE(21 delta) mode is 30 % greater than that of an ideal monopole, and the bandwidth is about f our times greater than the bandwidth of a patch antenna. (C) 1996 John Wiley & Sons, Inc.