High Gain 1-D Complementary Paired Combline PLWA with Backward to Forward Scanning

A design of a 1-D PLWA is discussed where a pair of complementary radiating stubs are connected to microstrip fed line. The edges of the stubs are tapered to get good impedance matching and OSB suppression. A slot is further introduced to this design to improve the gain and scanning range. The proposed antenna can achieve 17. 75dbi peak gain and have scanning range from −61° to +19°, bandwidth 6.1GHz – 10.5GHz, its dimensions are
$8.25\lambda_{0}\times 1. 5 \lambda_{0}$
with a small 1.5dbi gain variation at the broadside.