A wide band matching of H-plane tee

Cosec 2 hybrid travelling/resonant antenna for maritime surveillance applications

“…The antenna exploits hybrid architecture [1] as it combines a corporate feed BFN [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] made up of cascaded directional couplers and true-time delay phase shifters, and directive radiating elements, given by slotted rectangular waveguides in a travelling wave configuration. The antenna features constant detection for targets approaching from the horizon at a fixed height, owing to a square cosecant vertical beam distribution of the radiated power [21,22].…”