Affiliations: [a] School of Physics and Optoelectronic Engineering, Xidian University, Xi'an, Shaanxi, China | [b] Science and Technology on Antenna and Microwave Laboratory, Xidian University, Xi'an, Shaanxi, China | [c] Science and Technology on Electromagnetic Compatibility Laboratory, China Ship Development and Design Center, Wuhan, Hubei, China
Correspondence:
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Corresponding author: Shao-Li Zuo, School of Physics and Optoelectronic Engineering, Xidian University, Xi'an, Shaanxi 710071, China. E-mail:zuoshaoli@163.com
Abstract: A wideband dual-polarized crossed-dipole antenna with
shorted stubs for base station applications is presented. By using a pair of
orthogonal crossed-dipole, two linear polarizations (± 45°) are
obtained. The shorted subs are introduced to improve the impendence
bandwidth and enhance the isolation (S12) between the two orthogonal
polarizations. The antenna shows a wideband impedance characteristics of
about 29.4% for S11≤-10 dB (+45° polarization) and
S22≤ -10 dB (-45° polarization). High isolation
(S12≤ -32 dB) between the two polarizations in the required band is
obtained, which the lowest isolation is only -56 dB at about 1.8 GHz. The
stable peak gain, unidirectional radiation patterns, low cross-polarization
and high front-to-back ratio over the whole operating band are also
achieved. Due to its good performance, the antenna is very suitable for
potential base station applications in mobile communication such as DCS, PCS
and UMTS.
Keywords: Dual-polarized antenna, bowtie dipole, wideband antenna, base station
