Design of A Self-Diplexing Cylindrical Dielectric Resonator Antenna

A design of self-diplexing cylindrical dielectric resonator antenna (DRA) is presented in this paper. The DRA is based on ceramic material. The
$\text{HEM}_{11\delta}$
and
$\text{TM}_{02\delta}$
modes of the cylindrical DRA are excited by differential feeding and a metal probe respectively. A stub is adopted to suppress spurious modes of HEM and improve the isolation of the two input ports. The results show that, within two frequency bands 2.73-3.05 GHz and 6.19-6.52 GHz, the proposed antenna achieves good impedance matching (
$\vert S_{11}\vert < 10\ \text{dB}$
), and isolation (>26 dB). The proposed self-diplexing DRA could be appllied in modern wireless communication.