Gain Enhancement Using Corrugated Horn Feed for Optic Lens Antenna Application

A high gain and high efficiency optic lens antenna is presented. The antenna gain is enhanced by using an optimized corrugated horn as the optic lens feed, and moreover, the radiation patterns are improved with reduced sidelobe level. The simulated return loss is better than 15 dB from 80 to 90 GHz. A high gain of exceeding 43.5 dBi is realized and the sidelobe levels in both E and H planes are lower than -32 dB. And aperture efficiency of better than 45% is achieved over the operating frequency band. It is suitable to design high-gain and low sidelobe antennas in millimeter wave and terahertz bands.