A MULTIMODE COUPLER AND A SINGLE APERTURE MULTIMODE MONOPULSE TRACKING CUM COMMUNICATION FEED SYSTEM THEREOF

摘要

A MULTIMODE COUPLER AND A SINGLE APERTURE MULTIMODE MONOPULSE TRACKING CUM COMMUNICATION FEED SYSTEM THEREOF A multimode monopulse tracking scheme uses circular wave guide higher order modes, TE21 & Orthogonal-TE21 (TE21*), to generate pointing errors in azimuth and elevation planes respectively, while the dominant TEll mode is utilized to generate tracking sum signal as well as communication transmit and receive signals. The feed system requires a single radiating aperture (a conical or a corrugated horn); an innovative and compact cascaded turnstile-junction based multimode coupler for providing efficient coupling of orthogonal TE21 modes, A wave guide taper and a dual band OMT. (Fig 1)