Wideband Substrate Integrated Cavity-Backed Dielectric Resonator Antenna at Sub-6-GHz Band

The design and implementation of a wideband single-mode dielectric resonator antenna (DRA) with substrate integrated cavity-backed structure is presented in this paper. Two short-circuited striplines differential feeding are placed inside the cavity (SIC) for pure mode excitation DRA, providing stable radiation characteristics, low cross polarization levels. coupled to cylindrical DRA through an annular slot. fundamental ${\mathrm{ HEM}}_{11\delta }$ excited over wide frequency band, as result similar field distribution created on coupling slot by two modes cavity. Measurement results show maximum gain 8.2 dBi at 5.45 GHz. 7.8 center 5.15 GHz its 1-dB bandwidth 23%. measured 10-dB return loss 26% (centered GHz) which highest among previously reported works based DRAs DRAs. co-polarization cross-polarization difference boresight direction more than 26 dB. This element can be used cover range wireless standards access point applications due band performance.