A stripline-based planar wideband feed for high-gain antennas with partially reflecting superstructure

Affan A. Baba, Raheel M. Hashmi, Mohsen Asadnia, Ladislau Matekovits, Karu P. Esselle

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
45 Downloads (Pure)


This paper presents a new planar feeding structure for wideband resonant-cavity antennas (RCAs). The feeding structure consists of two stacked dielectric slabs with an air-gap in between. A U-shaped slot, etched in the top metal-cladding over the upper dielectric slab, is fed by a planar stripline printed on the back side of the dielectric slab. The lower dielectric slab backed by a ground plane, is used to reduce back radiation. To validate the wideband performance of the new structure, in an RCA configuration, it was integrated with a wideband all-dielectric single-layer partially reflecting superstructure (PRS) with a transverse permittivity gradient (TPG). The single-layer RCA fed by the U-slot feeding structure demonstrated a peak directivity of 18.5 dBi with a 3 dB directivity bandwidth of 32%. An RCA prototype was fabricated and experimental results are presented.
Original languageEnglish
Article number308
Pages (from-to)1-9
Number of pages9
Issue number5
Publication statusPublished - May 2019

Bibliographical note

Copyright the Author(s) 2019. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


  • high-gain
  • compact
  • wideband
  • resonant cavity
  • Fabry–Perot cavity
  • cavity resonator
  • EBG resonator


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