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A Low-Profile Aperture-Coupled Microstrip Antenna with Enhanced Bandwidth under Dual Resonance
Liu N.-W.; Zhu L.; Choi W.-W.; Zhang X.
2017-03-01
Source PublicationIEEE Transactions on Antennas and Propagation
ISSN0018926X
Volume65Issue:3Pages:1055-1062
Abstract

A low-profile aperture-coupled microstrip patch antenna (MPA) using the TM and TM resonant modes to enhance the impedance bandwidth is proposed in this paper. Based on the cavity model for a square MPA, the TM and TM modes as well as both higher odd-order and even-order modes between them can be characterized. In order to combine the dual radiative resonant modes for a wide impedance bandwidth, a rectangular radiating patch with an aperture-coupled feeder is employed and theoretically investigated at first, aiming to demonstrate that all of the undesired modes between them can be removed effectively. After that, by loading the shorting pins properly underneath the patch, the resonant frequency of TM mode is shown to progressively turn up with slight effect on that of TM mode. As a result, these two radiative modes can be allocated in proximity to each other, resulting in a wide impedance bandwidth with a stable radiation pattern and the same far-field polarization. Moreover, the principal parameters of the MPA have been extensively studied in order to investigate the sensitivity in input impedance of the aperture-fed patch antenna. Finally, the proposed antenna is fabricated and measured. Simulated and measured results are found in good agreement with each other and illustrate that the antenna achieves a wide impedance bandwidth of about 15.2% in fraction or 2.32-2.70 GHz under S <-10 dB, while keeping a low profile property with the height of 0.032 free-space wavelength. Besides, a stable gain varied from 3 to 6.8 dBi within the whole operating band is also obtained.

KeywordAperture-coupled Antenna Dual Resonant Modes Shorting Pin Wide Bandwidth
DOI10.1109/TAP.2017.2657486
URLView the original
Indexed BySCI
WOS Research AreaEngineering ; Telecommunications
WOS SubjectEngineering, Electrical & Electronic ; Telecommunications
WOS IDWOS:000396097500006
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Citation statistics
Cited Times [WOS]:55   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
AffiliationUniversidade de Macau
Recommended Citation
GB/T 7714
Liu N.-W.,Zhu L.,Choi W.-W.,et al. A Low-Profile Aperture-Coupled Microstrip Antenna with Enhanced Bandwidth under Dual Resonance[J]. IEEE Transactions on Antennas and Propagation,2017,65(3):1055-1062.
APA Liu N.-W.,Zhu L.,Choi W.-W.,&Zhang X..(2017).A Low-Profile Aperture-Coupled Microstrip Antenna with Enhanced Bandwidth under Dual Resonance.IEEE Transactions on Antennas and Propagation,65(3),1055-1062.
MLA Liu N.-W.,et al."A Low-Profile Aperture-Coupled Microstrip Antenna with Enhanced Bandwidth under Dual Resonance".IEEE Transactions on Antennas and Propagation 65.3(2017):1055-1062.
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