Abstract
This paper presents a broadband and dual-polarized antenna with absorbing structure for LTE/5G base station applications. The radiator of the proposed antenna is composed of two pairs of crossed printed dipoles, which are fed by Y-shaped baluns. Designing four absorbing structures are used to improve the front-to-rear ratio of the antenna. The proposed antenna has an overall size of λ <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">L</inf> × λ <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">L</inf> × 0.257λ <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">L</inf> (λ <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">L</inf> is the freespace wavelength at 3.0 GHz). The simulated results show that the bandwidth of this antenna achieves 47% (2.36~3.77 GHz) for S11/S22<-10dB and S21<-28dB, and a half-power beam width (HPBW) is 84±10 during the working bands. The antenna gain attains 7.55±0.35 dBi with a good stable radiation pattern. Therefore, the designed antenna is suitable for future LTE/5G base station antenna systems.
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