Design and Study of the Elevation Difference Channel Feed of the Single Aperture Monopulse Feed System

Abstract

The technique to generate the higher order modes TE11 and TM11 in the square waveguide, required for the E plane error single channel feed in the single perture monopulse feed system, has been presented and the appropriate assembly for this purpose has been designed in the 8.5-9.0 GHz frequency band. The assembly can be incorporated as an E plane error signal channel feed in the design of a single aperture monopulse feed system. The features of the design are a suppressed cross-polarised component of the radiation field and a deep null in the E plane pattern at the boresight axis of the feed. A qualitative explanation for the behaviour of the feed has been presented.