A low-profile surface wave antenna with directional beam pattern using 2-by-3 dogbone-pair structure

A surface wave antenna with a 2-by-3 array of a coupled array of dogbone-shaped pair, or dogbone-pair structure, is presented. This antenna has advantages of low-profile structure and having a directional radiation pattern. The direction of the main beam is directed parallel to the longest part of the dogbone element. Furthermore, this antenna shows a uni-directional radiation pattern in the horizontal plane and an increased antenna gain compared to that with 2-by-2 elements having a bi-directional radiation pattern.