Coupling substrate-integrated waveguides to increase the gain bandwidth of Leaky-wave antennas
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Knowledge AreaTeoría de la Señal y las Comunicaciones
SponsorsThis work has been supported by Spanish National project TEC2013-47037-C5-5-R, TEC2016-75934-C4-4-R, and Regional Seneca project 19494/PI/14.
Bibliographic CitationM. Poveda-García, D. Cañete-Rebenaque, G. Goussetis and J. L. Gómez-Tornero, "Coupling Substrate-Integrated Waveguides to Increase the Gain Bandwidth of Leaky-Wave Antennas," in IEEE Transactions on Microwave Theory and Techniques, vol. 66, no. 6, pp. 3099-3109, June 2018, doi: 10.1109/TMTT.2018.2830396.
Frequency beam squint
Substrate integrated waveguide
A novel technique to increase the pattern bandwidth of substrate-integrated waveguide leaky-wave antennas (SIW LWAs) is proposed. By coupling several SIWs, it is shown that the gain at the desired angle can be kept stable across a wide-frequency band. A systematic design methodology based on a simple transverse equivalent network is presented. Practical coupled-SIW designs with gain exceeding 10 dB and pointing at 30° in the 15-GHz band are reported to validate the theory. Simulation and experimental results demonstrate an enhancement of the half-power gain bandwidth from 2.5% (380 MHz) in the single-SIW design to 9% (1360 MHz) for an LWA composed of three coupled SIWs. IEEE.
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