Open AccessTheoretical anisotropic transverse resonance technique for the design of low‐profile wideband antennas
Author(s) -
Mitchell Gregory A.,
Wasylkiwskyj Wasyl
Publication year - 2016
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2015.0470
Subject(s) - wideband , transverse plane , bandwidth (computing) , resonance (particle physics) , optics , anisotropy , splitter , wavelength , physics , materials science , engineering , telecommunications , structural engineering , particle physics
The authors derive an anisotropic transverse resonance technique enabling the design of a low profile, wideband radiating rectangular cavity. They calculate a tapered geometry that preserves an effective half wavelength resonance within a cavity partially loaded with an anisotropic medium. This design results in an antenna profile of λ o /24, with 1.4 octaves of bandwidth, and a realised gain of 3.3–7.2 dB from 210 to 505 MHz. Using an adaption of a coaxial line to waveguide transition, which utilises two flat rectangular probes as a two‐port matching network, as well as an external 180° hybrid coupler as a phase splitter, they achieve a voltage standing wave ratio of better than 2:1 across the whole band.