Unidirectional Planar Monopole Antenna Using a Quasi-Radiator

A compact wideband planar monopole antenna with unidirectional radiation properties is proposed in this letter. The measured results demonstrate that the antenna has an S 11 < −10 dB bandwidth ranging from 2.3 to 6 GHz with an end-fire radiation pattern with front-to-back ratio ( F / B ) > 10 ...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2019-01, Vol.18 (1), p.157-161
Main Authors: Ellis, Mubarak Sani, Ahmed, Abdul-Rahman, Kponyo, Jerry John, Nourinia, Javad, Ghobadi, Changiz, Mohammadi, Bahman
Format: Article
Language:English
Subjects:
Antenna measurements
Antenna radiation patterns
Antennas
Bandwidths
Broadband
Compact
Directive antennas
Frequency ranges
Ground plane
Impedance matching
Monopole antennas
Monopoles
Radiators
reflector
unidirectional
Wideband
Wireless communications
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Summary:A compact wideband planar monopole antenna with unidirectional radiation properties is proposed in this letter. The measured results demonstrate that the antenna has an S 11 < −10 dB bandwidth ranging from 2.3 to 6 GHz with an end-fire radiation pattern with front-to-back ratio ( F / B ) > 10 dB across the operating frequency range. The antenna is very simple, comprising a slotted-stepped radiating patch attached to the ground plane through a shorting side stub. The antenna has a small size of 20 × 20 mm 2 , good F / B , and does not require cavity-backed structures and ground plane extensions, making it attractive for compact wireless devices. The antenna also possesses stable main lobe directions.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2018.2883579