The design of a horizontally polarized antenna array used for the suppression of Es layer clutter

There has Es layer clutter in the high frequency surface wave radar, and the Es layer clutter has the difference polarized characters with the signal. 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 antennas will affect the suppression of the Es layer clutter in the main antennas. An antenna array consists of three horizontally polarized antennas is proposed in this paper. Using the superdirective synthetically method, the mainlobe of the auxiliary horizontally polarized antenna array is put on the direction of the Es layer clutter arrival direction, and a low sidelobe is put on the direction of the signal arrival direction. Then the auxiliary horizontally polarized antenna array will have a big gain on Es layer clutter and a little gain on signal. So the suppression of the Es layer clutter in the main antennas which use the horizontally polarized antenna array as auxiliary antenna will be more effective.