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A Dual-Band Dual-Circularly-Polarized Slot Antenna with Stable In-Band Gain and Reduced Frequency Ratio Under Triple Resonance
Yanhui Xu1; Lei Zhu1; Neng-Wu Liu2; Mei Li3
2022-07-20
Source PublicationIEEE Transactions on Antennas and Propagation
ISSN0018-926X
Abstract

In this paper, a dual-band dual-circularly-polarized (CP) narrow slot antenna with stable in-band gain and reduced frequency ratio (FR) is proposed by resonating the 0.5λ-, λ- and 2λ-modes. For this purpose, two critical issues are significantly investigated and explored. The first effort is attempted to construct two pairs of orthogonal polarization with opposite rotation, i.e., (λ- and 0.5λ-mode) and (0.5λ- and 2λ-mode), by properly reshaping the equivalent magnetic currents of the slot radiator. Another attempt is to reallocate these modes in proximity to each other in virtue of stub-loaded technique, and ensure them to resonate in the designated sequence of λ-, 0.5λ- and 2λ-modes instead of the inherent sequence. With these improvements, the dual-CP performance can be successfully realized for our designed antenna. Finally, for experimental verification, a dual-band dual-CP slot antenna in virtue of the proposed design approach is implemented and tested. It proves that the left- and right-hand CP radiation patterns towards the z-axis are satisfactorily obtained around 1.88 and 2.39 GHz by simultaneously employing the triple resonance, thus revealing a small FR of 1.27. Moreover, the dual operation bands hold stable in-band gains of about 2.8 and 3.5 dBic. In addition, the CP antenna still maintains the single-layer, single-fed, and single-radiator properties, which evidently confirms the validity and effectiveness of the proposed design.

KeywordAntenna Radiation Patterns Broadband Antennas Current Distribution Dual Band Dual-band Dual-circularly Polarized Electric Fields Magnetic Resonance Narrow Slot Antenna Reduced Fr Slot Antennas Stable Gain
DOI10.1109/TAP.2022.3191133
URLView the original
Language英語English
Scopus ID2-s2.0-85135247333
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Citation statistics
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macau SAR, China
2.National Key Laboratory of Antennas and Microwave Technology, Xidian University, Xi’an, China
3.School of Microelectronics and Communication Engineering, Chongqing University, Chongqing, China
First Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Yanhui Xu,Lei Zhu,Neng-Wu Liu,et al. A Dual-Band Dual-Circularly-Polarized Slot Antenna with Stable In-Band Gain and Reduced Frequency Ratio Under Triple Resonance[J]. IEEE Transactions on Antennas and Propagation,2022.
APA Yanhui Xu,Lei Zhu,Neng-Wu Liu,&Mei Li.(2022).A Dual-Band Dual-Circularly-Polarized Slot Antenna with Stable In-Band Gain and Reduced Frequency Ratio Under Triple Resonance.IEEE Transactions on Antennas and Propagation.
MLA Yanhui Xu,et al."A Dual-Band Dual-Circularly-Polarized Slot Antenna with Stable In-Band Gain and Reduced Frequency Ratio Under Triple Resonance".IEEE Transactions on Antennas and Propagation (2022).
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