Design of Dual-Band Multimode Profiled Smooth-Walled Horn Antenna for Satellite Communication

Abstract

This letter is concerned with design and development of a new dual-band multimode profiled smooth-walled horn (DBPH) at Ku-band (uplink and downlink frequency bands). The horn is analyzed and optimized using mode-matching-technique-based software (Mician ¿ Wave wizard). Predicted radiation patterns and properties of the DBPH are compared to corresponding measured results showing good agreement. Relatively higher edge of coverage (EOC) gain and low cross-polar level at EOC is achieved with optimized DBPH by synthesizing higher order modes TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1m</sub> and TM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1m</sub> in proper ratio of amplitude and phase. An innovative modified hyperbolic profile is used to optimize the various performance objectives. The DBPH also provides higher bore-sight gain, higher aperture efficiency, and slightly wider beam (i.e. lower roll-off) in comparison to a conical horn having similar aperture dimension and length. The horn would be used as an element of a direct radiating horn cluster for multibeam satellite antenna application.