Antenna arrays used for the cancellation of Es layer clutter

There has Es layer clutter in the high frequency surface wave radar, and Es layer clutter have the difference arrival direction and polarized characters with the signal. Used these characters, vertically polarized antenna or horizontally polarized antenna can be added as auxiliary antenna in the high frequency surface wave radar system that uses vertically polarized antennas to suppress the Es layer clutter. The clutter-to-signal ratio in the outputs of the auxiliary antenna will affect the cancellation of the Es layer clutter in the main antennas. An antenna array consists of four vertically polarized dipoles and an antenna array consists of three horizontally polarized antennas are proposed in this paper. Used the superdirective synthetically method, the mainlobe of the auxiliary antenna arrays are put on the direction of the Es layer clutter arrival direction, and a low sidelobe are put on the direction of the signal arrival direction. Then the auxiliary antenna arrays will have a big gain on Es layer clutter and a little gain on signal. So the cancellation of the Es layer clutter in the main antennas which use the auxiliary antenna arrays will be more effective.