Wideband Differential Dielectric Resonator Antenna Using Balanced Microstrip-To-Slotline Power Divider

Abstract

A wideband differentially fed rectangular dielectric resonator antenna (DRA) is investigated in this paper. The proposed DRA is based on a wideband balanced-to-balanced microstrip-to-slotline power divider (MSPD). The balanced MSPD is designed using the multi-mode resonance of a slotline which realizes a broad 10-dB differential impedance bandwidth of 87% (1.84–4.45 GHz). The rectangular DRA can be excited to operate in a wideband TE₁₁₁ mode. The DRA has a 10-dB differential impedance bandwidth of about 42.6% (2.48–3.74 GHz) and a broadside radiation pattern with a peak gain of 5.2 dBi. The proposed differential-to-differential feeding mechanism to excite DRA can perfectly match with wideband differential circuits.