Endfire Substrate Integrated Dielectric Resonator Antenna With Dual-Beam Radiation for Millimeter-Wave Application

A millimeter-wave (mm-wave) endfire substrate integrated dielectric resonator antenna is proposed to provide dual-beam radiation. The dual-beam radiation is caused by the multilayer rectangular dielectric resonator (DR) with metallic walls on both sides and air vias at the center, which are used to generate modified TE
_13δ
mode and adjust the distribution of
E
-fields, respectively. The metallic walls, air vias, DR and feeding line can all be implemented with a printed circuit board (PCB) process, which enhances the integration level of the endfire dielectric resonator antenna. The theoretical analysis of the dual-beam radiation is provided to guide the practical design. Compared with the state-of-the-art designs, the proposed antenna not only achieves dual-beam radiation in endfire dielectric resonator antenna but also exhibits the capability of substrate integration and high radiation efficiency. For demonstration, a dual-beam prototype is fabricated and measured. The proposed antenna shows dual-beam radiation with ±61° beam direction and more than 13 dB suppression at the endfire direction.