A Novel Technique for Open Stop Band Suppression in 1-D Combline LWA Using Slots

A design of a 1-D PLWA is discussed where a slot is introduced in the structure to suppress an open stop band, obtain broadside scanning, and reduce gain variation at broadside frequency [10GHz]. A slot is introduced in a rectangular stub with an offset from the centerline which is further connected to a microstrip fed line. The proposed antenna can achieve 15.75dBi peak gain and have a scanning range from −52° to +12°, bandwidth 6.85GHz −11.35GHz, its dimensions are
$8.72\lambda_{0}\times 1.33\lambda_{0}$
.