1. A Stripline-Based Planar Wideband Feed for High-Gain Antennas with Partially Reflecting Superstructure
- Author
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Mohsen Asadnia, Affan A. Baba, Raheel M Hashimi, Karu P. Esselle, and Ladislau Matekovits
- Subjects
Permittivity ,high-gain ,Materials science ,compact ,lcsh:Mechanical engineering and machinery ,02 engineering and technology ,Dielectric ,EBG resonator ,Directivity ,Article ,Fabry–Perot cavity ,Planar ,Optics ,resonant cavity ,0202 electrical engineering, electronic engineering, information engineering ,cavity resonator ,lcsh:TJ1-1570 ,Electrical and Electronic Engineering ,Wideband ,Ground plane ,business.industry ,Mechanical Engineering ,020208 electrical & electronic engineering ,Bandwidth (signal processing) ,020206 networking & telecommunications ,wideband ,Control and Systems Engineering ,business ,Stripline - Abstract
© 2019 by the authors. 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.
- Published
- 2019