Abstract
Two bandwidth-enhanced broadband dual-polarized antennas (BEBDPAs) are proposed for 2G/3G/4G wireless communication systems and international mobile telecommunication services. The first BEBDPA is composed of two perpendicularly crossed dipoles. Its bandwidth is enhanced by introducing a parasitic loop below the two crossed dipoles and a parasitic disk with four parasitic strips above. The BEBDPA achieves an impedance bandwidth of 64% for reflection coefficients <–15 dB (1.4–2.75 GHz) with an isolation of 30 dB. The second BEBDPA is based on a pair of crossed dual-dipole elements with a parasitic disk above for bandwidth enhancement, featuring a reduced antenna size. The impedance bandwidth of the second BEBDPA is about 63% (1.4–2.7 GHz) with an isolation of 30 dB.
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