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Broadband dual‐polarized crossed‐dipole antenna with tapered integrated balun for base‐station applications
Author(s) -
Ye LiangHua,
Liu Gang,
Li YuanJun,
Li JianFeng,
Hu Zhenxin,
Wu DuoLong
Publication year - 2021
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22687
Subject(s) - dipole antenna , balun , beamwidth , radiation pattern , antenna measurement , standing wave ratio , physics , reflector (photography) , antenna (radio) , optics , acoustics , computer science , telecommunications , microstrip antenna , light source
A ± 45° dual‐polarized dipole antenna with low profile and stable radiation pattern over a wide operating band for base station is proposed. The antenna is formed by two polygon‐shaped dipoles and a shaped metallic reflector. Two baluns with tapered structure are used to excite the dipoles for dual‐polarized radiation and enhancing the impedance matching and bandwidth, while the shaped‐reflector is used to obtain stable radiation pattern in the horizontal plane during a wide frequency band. The design principles of crossed dipoles, baluns and reflector is described in detail. The proposed antenna achieves wide impedance bandwidth of 67% for VSWR<1.5, and high‐isolation better than 31 dB over the operating band. In addition, the 3 dB beamwidth in the horizontal plane of the antenna is stabilized within the range of 66.3° ± 2.8°. These performances make the presented antenna applicable for mobile communications.