Compact Independent Dual-Band Hybrid Resonator Antenna With Multifunctional Beams

This paper presents a new compact independent dual-band hybrid resonator antenna with multifunctional beams. The proposed antenna uses the combination of a thin circular disk dielectric resonator (DR) and a T-shaped microstrip line. In this configuration, the T-shaped microstrip line performs the functions of a radiator and a feed for the DR. By optimizing the structure parameters, the hybrid structure allows not only the DR to resonate at one band with the broadside patterns but also the microstrip line to resonate at another band with the conical like patterns, and the two bands can be independently designed. Based on the above design concept, an antenna prototype suitable for wireless communication applications centered at 1.9 and 2.45 GHz was successfully designed, fabricated and tested.