Tapered slot antenna with dielectric rod and metallic reflector

This work has developed an ultrawideband tapered slot antenna in the frequency range from 2.2 GHz to 8.5 GHz. High directivity is achieved by using a dielectric rod as a waveguide and a metallic reflector. The antenna exhibits a stable main beam direction over the band of operation and a measured mean gain of 8.1 dBi. At 5.5 GHz, a 3 dB opening angle of 42deg and a front-to-back ratio better than 14 dB were realized.