Millimeter-Wave Beam-Steerable Lens Antenna with Reduced Profile and Enhanced Gain

A 20×20 2-bit lens antenna is proposed utilizing the method of extracting actual phase shift (APS) by simulating element array (EA) for reduced profile and enhanced gain, which eliminates the effects of oblique incidences and simplifies the design process. Dielectric lenses elements are used to demonstrate the design. The proposed lens antenna exhibits enhanced gain and beam-steerable performance from 22 GHz – 30GHz. The gain enhances 3.4 dB at 26 GHz compared to the conventional design using the periodic boundary conditions. Moreover, the scan angle can maintain ± 30° within the whole bandwidth by mechanically displacing the feed antenna.