Ultra-Wideband Low-Cost High-Efficiency Cavity-Backed Compound Spiral Antenna

Ultra-Wideband Low-Cost High-Efficiency Cavity-Backed Compound Spiral Antenna

A low-cost high-efficiency ultra-wideband (UWB) cavity-backed spiral antenna is proposed. It employs an equiangular spiral enclosed by an Archimedean spiral and it is fed through a tapered microstrip balun. A center-raised cylindrical absorber-free cavity backs the spiral to minimize the backward ra...

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Bibliographic Details
Main Authors: Charl Baard, Yulang Liu, Natalia Nikolova
Format: Article
Language:English
Published: MDPI AG 2020-08-01
Series:Electronics
Subjects:
ultra-wideband antennas
spiral antennas
cavity backed spiral antennas
Online Access:https://www.mdpi.com/2079-9292/9/9/1399
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spelling doaj-036e1298c8754dab8afa116724b63e0f2020-11-25T02:58:46ZengMDPI AGElectronics2079-92922020-08-0191399139910.3390/electronics9091399Ultra-Wideband Low-Cost High-Efficiency Cavity-Backed Compound Spiral AntennaCharl Baard0Yulang Liu1Natalia Nikolova2Department of Electrical and Computer Engineering, McMaster University, Hamilton, ON L8S 4K1, USADepartment of Electrical and Computer Engineering, McMaster University, Hamilton, ON L8S 4K1, USADepartment of Electrical and Computer Engineering, McMaster University, Hamilton, ON L8S 4K1, USAA low-cost high-efficiency ultra-wideband (UWB) cavity-backed spiral antenna is proposed. It employs an equiangular spiral enclosed by an Archimedean spiral and it is fed through a tapered microstrip balun. A center-raised cylindrical absorber-free cavity backs the spiral to minimize the backward radiation without decreasing the efficiency. The cavity is designed to ensure an impedance bandwidth exceeding 16:1 ratio (from 350 MHz to 5.5 GHz). Simulated and measured results are presented and compared, demonstrating competitive performance in terms of impedance bandwidth and efficiency. Time–domain measurements indicate fidelity of 0.62 at boresight.https://www.mdpi.com/2079-9292/9/9/1399ultra-wideband antennasspiral antennascavity backed spiral antennas
collection DOAJ
language English
format Article
sources DOAJ
author Charl Baard
Yulang Liu
Natalia Nikolova
spellingShingle Charl Baard
Yulang Liu
Natalia Nikolova
Ultra-Wideband Low-Cost High-Efficiency Cavity-Backed Compound Spiral Antenna
Electronics
ultra-wideband antennas
spiral antennas
cavity backed spiral antennas
author_facet Charl Baard
Yulang Liu
Natalia Nikolova
author_sort Charl Baard
title Ultra-Wideband Low-Cost High-Efficiency Cavity-Backed Compound Spiral Antenna
title_short Ultra-Wideband Low-Cost High-Efficiency Cavity-Backed Compound Spiral Antenna
title_full Ultra-Wideband Low-Cost High-Efficiency Cavity-Backed Compound Spiral Antenna
title_fullStr Ultra-Wideband Low-Cost High-Efficiency Cavity-Backed Compound Spiral Antenna
title_full_unstemmed Ultra-Wideband Low-Cost High-Efficiency Cavity-Backed Compound Spiral Antenna
title_sort ultra-wideband low-cost high-efficiency cavity-backed compound spiral antenna
publisher MDPI AG
series Electronics
issn 2079-9292
publishDate 2020-08-01
description A low-cost high-efficiency ultra-wideband (UWB) cavity-backed spiral antenna is proposed. It employs an equiangular spiral enclosed by an Archimedean spiral and it is fed through a tapered microstrip balun. A center-raised cylindrical absorber-free cavity backs the spiral to minimize the backward radiation without decreasing the efficiency. The cavity is designed to ensure an impedance bandwidth exceeding 16:1 ratio (from 350 MHz to 5.5 GHz). Simulated and measured results are presented and compared, demonstrating competitive performance in terms of impedance bandwidth and efficiency. Time–domain measurements indicate fidelity of 0.62 at boresight.
topic ultra-wideband antennas
spiral antennas
cavity backed spiral antennas
url https://www.mdpi.com/2079-9292/9/9/1399
work_keys_str_mv AT charlbaard ultrawidebandlowcosthighefficiencycavitybackedcompoundspiralantenna
AT yulangliu ultrawidebandlowcosthighefficiencycavitybackedcompoundspiralantenna
AT natalianikolova ultrawidebandlowcosthighefficiencycavitybackedcompoundspiralantenna
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