High Gain Asymmetrical Branching Stub 1-D Combline Leaky Wave Antenna With Improved Backward To Forward Scanning

A Novel technique is presented eliminating the open stop band (OSB), which enables the antenna to scan through the broadside. The method is to introduce asymmetry in the structure. To introduce asymmetry in the 1-D combline periodic leaky wave antenna (PLWA): a rectangular stub is connected to another rectangular stub rotated at an angle θ° this structure is further connected to a microstrip fed line. The proposed 1-D PLWA shows OSB elimination, improvement in gain, and beam scanning. The proposed 1-D PLWA can achieve 16.2dbi peak gain and have a scanning range from -51° to +19°, bandwidth 6.1GHz -10.8GHz, its dimensions are 8.25λ
0
×1.5λ
0
.