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An integrated filtering antenna array with high selectivity and harmonics suppression

An integrated filtering antenna array with high selectivity and harmonics suppression

Mao, Chun-Xu, Gao, Steven, Wang, Yi, Wang, Zhengpeng, Qin, Fan, Sanz-Izquierdo, Benito and Chu, Qing-Xin (2016) An integrated filtering antenna array with high selectivity and harmonics suppression. IEEE Transactions on Microwave Theory and Techniques, 64 (6). pp. 1798-1805. ISSN 0018-9480 (doi:

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In this paper, a new design of antenna array with integrated functions of filtering, harmonics suppression and radiation is proposed. The device employs a multi-port network of coupled resonators, which is synthesized and designed as a whole to fulfil the functions of filtering, power combination/division and radiation. The 50 Ω interfaces between the cascaded filter, power divider and antenna in traditional RF front-ends are eliminated to achieve a highly integrated and compact structure. A novel resonator-based four-way out-of-phase filtering power divider is proposed and designed. It is coupled to the patch array, rendering a fourth-order filtering response. The coupling matrix of the resonator network is synthesized. The physical implementations of the resonators and their couplings are detailed. Compared to a traditional patch array, the integrated filtering array shows an improved bandwidth and frequency selectivity. In addition, the harmonic of the antenna array is suppressed due to the use of different types of resonators. To verify the concept, a 2 × 2 filtering array at S band is designed, prototyped and tested. Good agreement between simulations and measurements has been achieved, demonstrating the integrated filtering antenna array has the merits of wide bandwidth, high frequency selectivity, harmonics suppression, stable antenna gain and high polarization purity.

Item Type: Article
Additional Information: © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords: Bandwidth, filtering antenna array, frequency selectivity, harmonics suppression, integrated design.
Faculty / School / Research Centre / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > School of Engineering (ENG)
Last Modified: 12 Sep 2017 11:13

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