Gengtao Zhang, Haojie Chen, Yang Yang, Shengli Ma, Yufeng Jin
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A Differentially Fed Dual-polarized Antenna-in-Package Based on Stacked TGV Interposers for 5G Application
Based on stacked through glass via (TGV) interposers, a dual-polarized antenna-in-package is proposed for 5G application. The antenna element shows a 4.3 GHz (25.8 - 30.1 GHz) bandwidth, fully covering the n257 band (26.5 - 29.5 GHz), and good radiation performance with a 5.2 dBi gain and cross-polarization suppression higher than 35 dB at 28 GHz. Owing to the differential feeding networks, it displays high port isolation of more than 35 dB within the bandwidth. A 2 × 2 antenna subarray with an embedded IC in mirroring configuration is demonstrated to improve cross-polarization suppression by 12 dB compared with regular configuration.
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