Mao, Chun-Xu, Gao, Steven, Wang, Yi, Luo, Qi and Chu, Qing-Xin (2017) A shared-aperture dual-band dual-polarized filtering-antenna-array with improved frequency response. IEEE Transactions on Antennas and Propagation, PP (99). p. 1. ISSN 0018-926X (doi:https://doi.org/10.1109/TAP.2017.2670325)

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Abstract

In this paper, a novel dual-band dual-polarized (DBDP) array antenna with low frequency ratio and integrated filtering characteristics is proposed. By employing a dual-mode stub-loaded resonator (SLR) to feed and tune with two patches, the two feed networks for each polarization can be combined, resulting in the reduction of the feed networks and the input ports. In addition, owing to the native dual resonant features of the SLR, the proposed antenna exhibits 2nd-order filtering characteristics with improved bandwidth and out-of-band rejections. The antenna is synthesized and the design methodology is explained. The coupling coefficients between the SLR and the patches are investigated. To verify the design concept, a C/X-band element and a 2 × 2 array are optimized and prototyped. Measured results agree well with the simulations, showing good performance in terms of bandwidth, filtering, harmonic suppression and radiation at both bands. Such an integrated array design can be used to simplify the feed of a reflector antenna. To prove the concept, a paraboloid reflector fed by the proposed array is conceived and measured directivities of 24.6 dBi (24.7 dBi) and 28.6 dBi (29.2 dBi) for the X-polarization (Y-polarization) are obtained for the low- and high-band operations, respectively.

Item Type:	Article
Uncontrolled Keywords:	Dual-Band; Dual Polarization; Filtering Antenna; Array Antenna array; Filtering; Integrated; Stub-loaded resonator
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Engineering (ENG) Faculty of Engineering & Science > Future Technology and the Internet of Things
Last Modified:	12 Sep 2017 11:01
URI:	http://gala.gre.ac.uk/id/eprint/16227

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