Re-Examination of Watson’s Microwave Yagi Aerial

Gray, D., Mousavi, P. and Le Kernec, J. (2023) Re-Examination of Watson’s Microwave Yagi Aerial. In: IEICE Technical Committee on Antennas and Propagation (AP), Suita, Japan, 14 Apr 2023, pp. 16-21.

Abstract

A historical end-fire 34-slot travelling wave rectangular waveguide antenna has a more rigid structure than comparable travelling or leaky-wave end fire antennas. In simulation the published antenna design had peak directivity of 16.2dBi with 1dB directivity bandwidth of 12.2% but the matching was poor with S11≈-3dB. The feed section of the antenna was found to be independent of the travelling wave and front sections, enabling faster tuning. Changing the original narrow wall inclined slot feed to a narrow wall Z-slot gave S11≤-10dB bandwidth of 8% making the antenna of practical value. Comparison is made to a dielectric polyrod antenna which had comparable performance across an octave.

• Item Type: Conference Proceedings
• Keywords: polyrod antenna, travelling wave antenna.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Gray, Dr Derek and Le Kernec, Dr Julien
• Authors: Gray, D., Mousavi, P., and Le Kernec, J.
• College/School: College of Science and Engineering > School of Engineering; College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity
• ISSN: 2432-6380
• Copyright Holders: Copyright © 2023 by IEICE
• First Published: First published in IEICE Technical Report 123(7):16-21
• Publisher Policy: Reproduced in accordance with the publisher copyright policy

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