A compact multimode broadband dual‐polarized base station antenna for LTE and 5G applications

Abstract

A compact multimode broadband ±45° dual‐polarized base station antenna for LTE and 5G applications is proposed. By introducing folded circular ring dipoles loaded with short wires into the stepped square ring dipoles to create a new resonance mode at high frequency to achieve the purpose of extending the bandwidth. Simulation and experiment show that the antenna can achieve a bandwidth of 55.9% (2.28‐4.05 GHz) within the operating frequency (|S11| < −15 dB and |S21| < −25 dB), and the proposed antenna has a measured gain about 8.3 ± 0.9 dBi and a cross polarization ratio greater than 25 dB.

A height‐reduction antenna with simple structure for base station

“…In order to obtain directional radiation and high gain, base station antennas generally use a perfect electrical conductor (PEC) as the reflector, and at the same time to improve the radiation efficiency of the antenna, the height of the antenna from the reflector is usually 0.25λ 0 . [1][2][3][4][5][6][7][8] Therefore, low-profile antennas have important research for minimizing the manufacturing charge of operators and improving the antenna's anti-risk capability.…”

Wideband dual‐polarized wide solid angle scanning cylindrically conformal millimeter‐wave phased array

“…However, the bandwidth of above arrays is narrower than 10%. Most sub-6 GHz wideband dual-polarized base station antennas are inspired by cross dipoles fed by vertical balun, [9][10][11][12][13] which is difficult be applied to mmWave base stations. 14 Therefore, appropriate cylindrically-conformal phased array with wide band, dual-polarization, and wide-angle scanning characteristics is still needed to be researched for mmWave base stations.…”

A compact dipole driven ring base station antenna for full sub‐6 GHz band applications

“…To expand the bandwidth of base station antennas, various methodologies are applied, such as shaping the patch, 5,6 loading the parasitic element, 7,8 using the artificial magnetic conductor (AMC) reflector, 9–11 or slotting the patch 12,13 . Specifically, the ring dipole is used to realize wide dual‐band characteristics 14,15 . By utilizing a pair of ring dipoles, T‐shaped feeding lines, L‐shaped parasitic elements, and metal cylinders, a broadband dual‐polarized antenna for LTE/5G base applications was presented in Wang et al 16 When one ring dipole is excited, the other is regarded as the parasitic element to broaden the bandwidth efficiently.…”

“…12,13 Specifically, the ring dipole is used to realize wide dual-band characteristics. 14,15 By utilizing a pair of ring dipoles, T-shaped feeding lines, L-shaped parasitic elements, and metal cylinders, a broadband dual-polarized antenna for LTE/5G base applications was presented in Wang et al 16 When one ring dipole is excited, the other is regarded as the parasitic element to broaden the bandwidth efficiently. It can achieve a wide band of 48.6% from 2.21 to 3.63 GHz with a stable gain of 8.30 dBi.…”