Axially corrugated feed horn for the next generation very large array (ngVLA) band-5 receiver

From National Research Council Canada

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DOI	Resolve DOI: https://doi.org/10.1109/OJAP.2025.3572811
Author	Search for: Hesari, S. Salem¹ORCID identifier: https://orcid.org/0009-0004-1613-7068; Search for: Veidt, B.¹ORCID identifier: https://orcid.org/0000-0003-3182-2720; Search for: Henke, D.¹ORCID identifier: https://orcid.org/0000-0001-7732-5178; Search for: DuVerneay, B.; Search for: Vijayamohanan, J.ORCID identifier: https://orcid.org/0000-0001-5082-6212; Search for: Christodoulou, C. G.ORCID identifier: https://orcid.org/0000-0002-9306-8666; Search for: Grammer, W.; Search for: Densmore, A.¹
Affiliation	National Research Council Canada. Herzberg Astronomy and Astrophysics
Format	Text, Article
Subject	feed horn; corrugated feed; axially corrugated horn; ngVLA; radio astronomy; band-5; Q-band; antenna
Abstract	This paper introduces a novel axially corrugated feed horn designed for the ngVLA Band-5 receiver, covering the 30–50 GHz range with potential adaptability to nearby bands. The horn features a circular waveguide with a flared throat and six precisely engineered quarter-wavelength corrugations. This structure achieves exceptional performance, including a return loss better than 25 dB and an average aperture efficiency of 95.5% across the full bandwidth. Measurements confirm the simulated results, validating the design. Compared to existing solutions, this feed horn offers a unique combination of wide bandwidth, high efficiency, and excellent signal fidelity in a compact, easily manufacturable form. These advancements address multiple challenges in radio astronomy receiver design, supporting the next generation of high-sensitivity telescopes like the ngVLA.
Publication date	2025-05-23
Publisher	IEEE
Licence	Creative Commons, Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/
In	IEEE Open Journal of Antennas and Propagation (23 May 2025): 1–15.
Language	English
In press	Yes
Peer reviewed	Yes
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Record identifier	33f101c1-501c-4ecf-a14f-f9b12edb8f8d
Record created	2025-09-09
Record modified	2025-11-04

Date modified:: 2026-02-18