Design and Analysis of a Compact Wideband Quad Ridge Feed Horn for Radio Telescopes

This paper presents the design and analysis of a compact, wideband quad ridge feed horn that operates within the 25 to 50 GHz range, achieving a return loss better than 15 dB. By merging quad ridge waveguide and corrugated horn technologies, the feed horn delivers enhanced wideband capabilities and beamwidth symmetry, ensuring high efficiency and stable radiation patterns. Tailored for cutting-edge radio astronomy projects such as ngVLA and SKA, this hybrid feed horn overcomes traditional receiver limitations, advancing scientific research through superior bandwidth and precise radiation pattern control.