A Dynamic Distilled Water Horn Antenna with Low Profile and Low Radar Cross Section

A dynamic water horn antenna modeled after fountains and irrigation nozzles is proposed, using a cylindrical ring as the base and conical ring of water and air mixture as the spray. Unlike other water antennas, water conical ring in this work does not need additional supporting containers, a water inlet is use to make the water stream into a desired conical ring shape, leading to low profile and low RCS, especially when the antenna is not in operation. In addition, an alternative water horn antenna is designed as well, which replaces water conical rings with water columns. As a complementary study, a water horn antenna with downward flowing water loading top is also modeled and investigated. Simulation results are given to illustrate the feasibility of the proposed antennas.