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A Low-Profile Differential-Fed Patch Antenna with Bandwidth Enhancement and Sidelobe Reduction under Operation of TM10 and TM12 Modes
Liu N.-W.2; Zhu L.1; Choi W.-W.1; Zhang X.1
2018-09-01
Source PublicationIEEE Transactions on Antennas and Propagation
ISSN0018926X
Volume66Issue:9Pages:4854-4859
Abstract

A low-profile differential-fed microstrip patch antenna (MPA) using TM and TM modes is proposed in this communication toward simultaneously achieving the impedance-bandwidth enhancement and sidelobe reduction. Based on the transmission-line model, the radiation patterns of TM mode of the MPA loaded with shorting pins and slots are at first deeply investigated. The results demonstrate that the E-plane sidelobe could be gradually reduced by lowering the resonant frequency of TM mode (f) less than two times of the fundamental frequency (f). After that, the two adjacent TM and TM modes of the MPA are relocated to resonate in proximity to each other for bandwidth improvement and sidelobe reduction. By inserting the shorting pins underneath the radiating patch, f is progressively pushed up with a slight effect on that of TM mode (f). Then, the patch width is enlarged with the parallel slots etched out on it to move f closely to f. Moreover, a narrow slot is etched at the center of the patch for good impedance matching. With these arrangements, f/f can be decreased dramatically to about 1.27. Finally, the antenna prototype is fabricated and measured. Experimental results show that the impedance bandwidth of the MPA is tremendously extended to about 10%, while keeping a low profile of 0.039 free-space wavelength. In particular, the sidelobe level of the antenna is dramatically reduced to about-12 dB.

KeywordBandwidth Enhancement Differential-fed Antenna Dual-resonant Modes Patch Antenna Sidelobe Reduction
DOI10.1109/TAP.2018.2851393
URLView the original
Indexed BySCI
WOS Research AreaEngineering ; Telecommunications
WOS SubjectEngineering, Electrical & Electronic ; Telecommunications
WOS IDWOS:000444018400046
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Cited Times [WOS]:5   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.Universidade de Macau
2.Xidian University
Recommended Citation
GB/T 7714
Liu N.-W.,Zhu L.,Choi W.-W.,et al. A Low-Profile Differential-Fed Patch Antenna with Bandwidth Enhancement and Sidelobe Reduction under Operation of TM10 and TM12 Modes[J]. IEEE Transactions on Antennas and Propagation,2018,66(9):4854-4859.
APA Liu N.-W.,Zhu L.,Choi W.-W.,&Zhang X..(2018).A Low-Profile Differential-Fed Patch Antenna with Bandwidth Enhancement and Sidelobe Reduction under Operation of TM10 and TM12 Modes.IEEE Transactions on Antennas and Propagation,66(9),4854-4859.
MLA Liu N.-W.,et al."A Low-Profile Differential-Fed Patch Antenna with Bandwidth Enhancement and Sidelobe Reduction under Operation of TM10 and TM12 Modes".IEEE Transactions on Antennas and Propagation 66.9(2018):4854-4859.
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