- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | ZHOU Wenying, XU Jinjing, LU Mai, LI Yuxin. Miniaturized Dual-Band Trackside Antenna Design and Its Electromagnetic Compatibility Study[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20240220
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To meet the demand for 5G communication in tunnels and increase the utilization rate of trackside antennas, a dual-band trackside antenna based on metamaterials was proposed, which could support both automatic train control systems and civil 5G wireless communication. First, a miniaturized dual-band trackside antenna was designed based on the 5G communication deployment scheme, and the finite element method was used to simulate the electromagnetic properties of the antenna before and after miniaturization. The impact on the electromagnetic environment and other radiation sources in the tunnel was evaluated. Second, a lightweight human body model containing important tissue such as the trunk, skull, brain, and heart was constructed, so as to compare the effects of radiation on the specific absorption rate (SAR) of human tissue between the simulated traditional single-band trackside antenna and the miniaturized dual-band trackside antenna. The results show that the miniaturized dual-band trackside antenna is 40% and 20% smaller than the traditional single-band trackside antenna when the antenna operates at 2.45 GHz and 3.4 GHz, respectively, and the electric field strength in the surrounding tunnel space is reduced by over 2.09% and 6.57%. The induced electric field strength on the leaky coaxial cable is reduced by 19.67% and 32.41%, respectively. The miniaturization of the antenna effectively reduces the impact on surrounding radiation sources and improves the electromagnetic compatibility of the trackside antenna inside the tunnel. The miniaturized dual-band trackside antenna makes the SAR values absorbed by the trunk, skull, brain, and heart of the human body drop by 19.76%, 46.60%, 55.62%, and 55.28%, respectively, which significantly decreases the radiation impact of the trackside antenna on occupational groups.
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