Low-Profile Broadband Dual-Polarized Dipole Antenna for Base Station Applications

Author:

Feng Hao1ORCID,Li Mengyuan2,Zhang Zhiyi3ORCID,Fu Jiahui1,Zhang Qunhao1,Zhao Yulin4

Affiliation:

1. School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150001, China

2. AVIC Research Institute for Special Structures of Aeronautical Composites, Jinan 250104, China

3. Department of Electrical Engineering, City University of Hong Kong, Hong Kong SAR, China

4. College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 314423, China

Abstract

A low-profile broadband dual-polarized antenna is investigated for base station applications. It consists of two orthogonal dipoles, fork-shaped feeding lines, an artificial magnetic conductor (AMC), and parasitic strips. By utilizing the Brillouin dispersion diagram, the AMC is designed as the antenna reflector. It has a wide in-phase reflection bandwidth of 54.7% (1.54–2.70 GHz) and a surface-wave bound range of 0–2.65 GHz. This design effectively reduces the antenna profile by over 50% compared to traditional antennas without an AMC. For demonstration, a prototype is fabricated for 2G/3G/LTE base station applications. Good agreement between the simulations and measurements is observed. The measured −10-dB impedance bandwidth of our antenna is 55.4% (1.58–2.79 GHz), with a stable gain of 9.5 dBi and a high isolation of more than 30 dB across the impedance passband. As a result, this antenna is an excellent candidate for miniaturized base station antenna applications.

Funder

National Natural Science Foundation of China

Publisher

MDPI AG

Subject

Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry

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