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Open AccessArticle

A Stripline-Based Planar Wideband Feed for High-Gain Antennas with Partially Reflecting Superstructure

1
School of Engineering, Macquarie University, Sydney, New South Wales 2109, Australia
2
Department of Electronics and Telecommunication, Politecnico di Torino, 10129 Turin, Italy
*
Author to whom correspondence should be addressed.
Micromachines 2019, 10(5), 308; https://doi.org/10.3390/mi10050308
Received: 12 April 2019 / Revised: 30 April 2019 / Accepted: 5 May 2019 / Published: 7 May 2019
(This article belongs to the Special Issue Nanodevices for Microwave and Millimeter Wave Applications)
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. View Full-Text
Keywords: high-gain; compact; wideband; resonant cavity; Fabry–Perot cavity; cavity resonator; EBG resonator high-gain; compact; wideband; resonant cavity; Fabry–Perot cavity; cavity resonator; EBG resonator
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MDPI and ACS Style

Baba, A.A.; Hashmi, R.M.; Asadnia, M.; Matekovits, L.; Esselle, K.P. A Stripline-Based Planar Wideband Feed for High-Gain Antennas with Partially Reflecting Superstructure. Micromachines 2019, 10, 308.

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