Coupling Substrate-Integrated Waveguides to Increase the Gain Bandwidth of Leaky-Wave Antennas

Journal ar
IEEE Transactions on Microwave Theory and Techniques
  • Volumen: 66
  • Número: 6
  • Fecha: 01 June 2018
  • Páginas: 3099-3109
  • ISSN: 00189480
  • Source Type: Journal
  • DOI: 10.1109/TMTT.2018.2830396
  • Document Type: Article
  • Publisher: Institute of Electrical and Electronics Engineers Inc.
© 1963-2012 IEEE.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.

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