Dipole Antenna Design for Portable Devices Operating in the 5g Nr Frequency Bands

Li, Yongwei; Feng, Quanyuan; Zhou, Liguo

doi:10.2528/pierl21090401

Cited by 4 publications

(1 citation statement)

References 11 publications

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“…W ith the demand of intelligent coal mining, the 5G technique possessing the advantages of higher transmission rate, lower latency, and higher reliability has been gradually applied in some of the large coal mine [1,2]. 5G NR has been assigned for coal mine applications including three frequency bands, which are 2.51-2.68 GHz, 3.40-3.60 GHz, and 4.80-4.90 GHz [3,4]. As the front end of an electronic equipment, an antenna simultaneously operating at these three bands can guarantee the applications of 5G technology in coal mine.…”

Section: Introductionmentioning

confidence: 99%

A Compact Multi-band Monopole Antenna for 5G NR Coal Mine Applications

Xu,

Bai,

Zhang

et al. 2024

PIER Letters

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At present, 5G technology is gradually applied in coal mine applications. Under this circumstance, a microstrip patch antenna based on a multi-branch structure is firstly designed which can operate at the allocated 5G for coal mine. Nevertheless, this antenna exhibits a large size, even at the lowest operating frequency (0.41λ×0.41λ at 2.51 GHz). To reduce the size of the antenna, the three branches are separately bent into C, S, and L shapes from left to right, and a size of 0.33λ × 0.33λ at 2.51 GHz is realized, i.e., 35% size reduction is achieved. To further achieve a compact size, a new structure is designed. In particular, two inverted J-shaped branches and a rectangular branch acting as radiating portion are respectively arranged and optimized to cover the above three frequency bands where the rectangular branch is located between the two inverted J-shaped branches. To enhance the impedance matching characteristic of the antenna, a T-shaped structure is loaded on the other side of the substrate. The resultant size of this antenna is 0.20λ × 0.16λ at 2.51 GHz, which is around 81% and 71% smaller than the first and second designed antennas. The measured results of the antennas are in good agreement with the simulated ones. Therefore, the third antenna is a good candidate for coal mine applications due to its relatively small size, low profile, and easy integration with equipment.

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Section: Introductionmentioning

confidence: 99%