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Gain enhanced H-plane gap SIW horn antenna with phase correction

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Published
  • Lei Wang
  • Marc Esquius-Morote
  • Xiaoxing Yin
  • Juan R. Mosig
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Publication date31/08/2015
Host publication2015 9th European Conference on Antennas and Propagation (EuCAP)
PublisherIEEE
ISBN (print)9788890701856
<mark>Original language</mark>English

Abstract

The electromagnetic field phase distribution in horns' apertures is affected by the horn flaring and is usually not uniform, resulting in a lower antenna gain. This paper presents an H-plane SIW horn antenna with the aperture phase corrected by some gaps on the H-plane metallic walls, to enhance the antenna gain. To achieve a better radiation and impedance matching, some planar tapered-ladder transitions are printed just after the horn aperture. Simulations in HFSS software, including a probe excitation, have shown good phase correction and hence increased gain, while also providing good impedance matching. The designed compact Ka-band antenna achieves an enhanced gain of 10.1 dBi at 34 GHz, and an impedance bandwidth of 4.33 GHz.