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Low-Dispersive Leaky-Wave Antenna Integrated in Groove Gap Waveguide Technology
Hamburg Univ Technol, Inst Electromagnet Theory, D-21079 Hamburg, Germany..
Tech Univ Cartagena, Dept Commun & Informat Technol, Cartagena 30202, Spain..
Univ Carlos III Madrid, Dept Commun & Signal Theory, Madrid 28911, Spain..
KTH, School of Electrical Engineering and Computer Science (EECS), Electromagnetic Engineering.ORCID iD: 0000-0002-4900-4788
2018 (English)In: IEEE Transactions on Antennas and Propagation, ISSN 0018-926X, E-ISSN 1558-2221, Vol. 66, no 11, p. 5727-5736Article in journal (Refereed) Published
Abstract [en]

In this paper, the use of a dispersive prism with a triangular shape is proposed to reduce the dispersive radiation nature of a leaky-wave antenna (LWA) in groove-gap waveguide technology. The operation of gap waveguide technology is based on the use of metallic pins that act as an artificial magnetic conductor, so the electromagnetic fields are confined and guided in the desired directions. To control a leaky-wave radiation of these confined fields is possible by tailoring the height of the pins, its periodicity, and the waveguide width. This radiation, as in any conventional LWA, is dispersive, leading to beam squint as the frequency is varied. Here, we mitigate this beam squint by using a prism made of dispersive pins and choosing appropriately their periodicity and height. With this prism, the leaky-wave radiation is focused into one single direction in a wide frequency band. This concept is demonstrated with a prototype designed to radiate at phi = 41 degrees with a central frequency of 12 GHz and the high gain of 16.5 dBi. A 22% frequency bandwidth for the 3 dB realized gain at phi = 41 degrees is achieved, and the main radiating direction, with half-power beamwidth of 5 degrees, steers only +/- 0.5 degrees from 11.4 to 13.4 GHz.

Place, publisher, year, edition, pages
IEEE, 2018. Vol. 66, no 11, p. 5727-5736
Keywords [en]
Dispersive prism, gap waveguide, leaky-wave antenna (LWA)
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-239076DOI: 10.1109/TAP.2018.2863115ISI: 000449107400006Scopus ID: 2-s2.0-85051000683OAI: oai:DiVA.org:kth-239076DiVA, id: diva2:1264932
Note

QC 20181121

Available from: 2018-11-21 Created: 2018-11-21 Last updated: 2019-08-20Bibliographically approved

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Quevedo-Teruel, Oscar

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