Broadband SIW Horn Antenna Loaded with Offset Double-Sided Parallel-Strip Lines

Yufan Cao, Yang Cai*, Cheng Jin, Zuping Qian, Lei Zhu, Wei Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

A novel substrate integrated waveguide horn antenna loaded with offset double-sided parallel-strip lines (DSPSL) is proposed in this letter. The severe mismatch between horn aperture and free space leads to narrow impedance bandwidth when the substrate thickness is much smaller than the wavelength (typically less than λ06). Two groups of periodic offset DSPSL structure are placed in front of the horn aperture, which acts as an impedance transformer to realize smooth transition. Good impedance matching can be easily realized by modifying the constitutive parameters of the offset DSPSL structure. Measured results show that the impedance bandwidth can be improved up to 20.5% from 14 to 17.2 GHz with a low profile less than λ 0/13. Stable end-fire radiation patterns are obtained across the bandwidth.

Original languageEnglish
Article number8437151
Pages (from-to)1740-1744
Number of pages5
JournalIEEE Antennas and Wireless Propagation Letters
Volume17
Issue number9
DOIs
Publication statusPublished - Sept 2018

Keywords

  • Double-sided parallel-strip lines (DSPSL)
  • horn antenna
  • substrate integrated waveguide (SIW)
  • wideband

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