On the use of a metasurface prism in gap-waveguide technology to reduce the dispersion of leaky-wave antennas

Lei Wang, José Luis Gómez-Tornero, Eva Rajo-Iglesias, Oscar Quevedo-Teruel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Leaky-wave antennas (LWAs) feature the advantages of high directivity, wide impedance bandwidth, and their ability to scan with frequency. However, the dispersive beam-scanning makes the LWAs very difficult to be utilized in systems that require high-speed data transfer, wide band and high directive antennas. This paper proposes a simple but effective method to reduce the dispersion of LWAs by loading with a metasurface prism realized in gap-waveguide technology. Naturally combining the two technologies, a leaky-wave gap waveguide antenna and a dispersive prism, a low-dispersive gap-waveguide leaky-wave antenna is achieved, with a specific radiation direction that in this example is ϕ= 41°. The main radiation direction varies only ±0.5° from 11.5 to 13.0 GHz, with side-lobe levels lower than −13 dB. A 20% half-power gain-drop frequency bandwidth has been obtained. The realized gain varies from 16.4 to 16.8 dBi with a narrow half-power beamwidth of 5°. The full-wave simulations in HFSS agree well with the theoretical calculations.
Original languageEnglish
Title of host publication12th European Conference on Antennas and Propagation (EuCAP 2018)
PublisherInstitution of Engineering and Technology
ISBN (Electronic)9781785618161
ISBN (Print)9781785618154
DOIs
Publication statusPublished - 10 Dec 2018

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    Wang, L., Gómez-Tornero, J. L., Rajo-Iglesias, E., & Quevedo-Teruel, O. (2018). On the use of a metasurface prism in gap-waveguide technology to reduce the dispersion of leaky-wave antennas. In 12th European Conference on Antennas and Propagation (EuCAP 2018) [8568453] Institution of Engineering and Technology. https://doi.org/10.1049/cp.2018.0775