Abstract

A novel multimode horn loaded with a conical corrugated ring is designed. Simulation results show that the relative bandwidth of the multimode horn is 20% at 5.5GHz∼6.5GHz, with axisymmetric radiation pattern and low sidelobes. The cross-polarization levels are 35dB lower than the co-polarization in E and H plane. The size of the antenna can be reduced 50% comparing with a changing flare angle multimode horn. Because of its short length and a small quantity of corrugated periods, the designed horn can be conveniently to be produced and applied in radar and communication systems.

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