Design of a Broadband, Wide-Beam Hollow Cavity Multilayer Antenna for Phased Array Applications

A broadband and wide-beam antenna with a hollowcavity multilayer H-shaped slot structure is presented and manufactured by microwave multilayers laminate technology (MLT) simultaneously. Numerical investigation and experiment on a 64-element (8×8 ) array has been implemented, which is composed of the proposed antenna elements that have been designed, fabricated, and measured. The measured impedance bandwidth of the proposed antenna embedded in the array is beyond 25% with the reference of S
₁₁
<;-10 dB. The phased array composed of the presented antenna is able to cover ±60° wide-angle scanning range with low scanning gain loss.