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Design of a dual-wideband dual-polarized planar shared aperture microstrip antenna array is proposed in this article. Differential feeding method is used to enhance the isolation between polarizations of the antenna in both bands.Corporate feed network is used for good radiation pattern results. Further, the coupling between the feed networks the two orthogonal polarizations is minimized. This is achieved using the antenna elements to separate the feed networks for orthogonal polarizations. To verify the antenna design, a prototype is fabricated and measured. For VSWR, the antenna can cover from 1.07 to 1.24 GHz (14.7%) and from 8.3 to10.3 GHz (21.5%), respectively. The measured isolation between bands is higher than 30 dB and the isolation between polarizations is higher than 22.5 and 29.6 dB in L- and X-band, respectively. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2197–2204, 2015

A shared-aperture dual-wideband dual-polarized planar microstrip array is investigated.The operating frequencies are at L- and X-bands. For both bands, stacked patches are selected as the radiating elements to meet the bandwidth requirements. A low-profile design of a planar microstrip array with 2 × 1 L-band elements interleaved with 16 × 8 X-band elements has been achieved. The design is discussed in detail, and the measured results are presented. The measured bandwidth of VSWR < 2 reaches 8.1 and 13% for L- and X-bands, respectively. The measured isolation between the L- and X-band is below −35 dB, and the isolation between the cross-pol ports is below −26 and −24 dB for L- and X-band, respectively. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:486–491, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26579