Efficient tapered dielectric image line antenna in planar environment

In this paper, a directive dielectric image line (DIL) tapered planar antenna is presented in Ku-band. The antenna is fed by substrate integrated waveguide (SIW) which is designed with the dielectric image line taper antenna on a single substrate to make the design fully planar. Simulations are carried out in Ansoft HFSS. The proposed antenna provides 15 dBi gain over wide bandwidth (33.33%), and with almost frequency-independent main lobe tilted at 72° from broadside.