A compact (100 mm × 100 mm × 40 mm) dual-polarized antenna with wide impedance bandwidth and high isolation is proposed for an indoor MIMO wireless communication system. The proposed antenna consists of cavity-backed bowtie antennas with parasitic elements. It can cover the DCS/PCS/UMTS/LTE 1, 2, 3, 4, 7, 9, 10, 15, 16, 23, 25 bands (1710-2690 MHz). The wide impedance bandwidth (VSWR31 dB) and low-envelop correlation coefficient (ECC <; 0.00425) between MIMO elements are achieved by orthogonal dual-polarization while suppressing the cross-polarization of each MIMO antenna element. The peak gain is higher than 7 dBi in the entire operating frequency band.
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Lee et al. (2015) studied this question.
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