A Wideband Dual-CP Antenna with Low-Profile Based on Distributed Coupling for Coal Mine Communication.

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Bibliographic Details
Title:	A Wideband Dual-CP Antenna with Low-Profile Based on Distributed Coupling for Coal Mine Communication.
Authors:	Li, Lei^1,2 lntuicgroup@163.com, Wang, Xiaomeng^1,2, Jia, Yuting^1,2, Wang, Yanting^1,2, Zhang, Hongyu^1,2, Nan, Jingchang^1,2
Source:	Progress in Electromagnetics Research C. 2026, Vol. 166, p267-277. 11p.
Subjects:	Electromagnetic coupling, Circular polarization, Planar antennas, Ultra-wideband antennas, Telecommunication systems, Bandwidths, Microstrip antennas
Abstract:	This study presents a wideband dual-circularly polarized (dual-CP) antenna based on a distributed electromagnetic coupling mechanism. The antenna employed a circular slot structure fed by dual L-shaped microstrip lines. By introducing a rectangular protrusion on the ground plane and splitting it with a narrow slit, multiple parallel radiating paths were formed, establishing a distributed coupling mechanism. This mechanism introduces multiple resonant points to extend the impedance bandwidth (IBW) and generates multiple orthogonal components to enhance the axial ratio bandwidth (ARBW). The dual-port, left-right symmetric configuration enables dual-CP operation. The narrow slit decouples the shared current paths between the feeding structures, further enhancing the port isolation. Owing to its single-layer structure, the fabricated antenna achieves a low profile of only 0.011λ0. Measured results show an IBW of 87.8% (2.98-7.65 GHz) and an ARBW of 66.9% (2.72-5.47 GHz). The proposed antenna achieves a wide bandwidth and low profile simultaneously, featuring a simple and easy-to-manufacture structure. Its operating band meets the requirements for coal mine communication systems. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	This study presents a wideband dual-circularly polarized (dual-CP) antenna based on a distributed electromagnetic coupling mechanism. The antenna employed a circular slot structure fed by dual L-shaped microstrip lines. By introducing a rectangular protrusion on the ground plane and splitting it with a narrow slit, multiple parallel radiating paths were formed, establishing a distributed coupling mechanism. This mechanism introduces multiple resonant points to extend the impedance bandwidth (IBW) and generates multiple orthogonal components to enhance the axial ratio bandwidth (ARBW). The dual-port, left-right symmetric configuration enables dual-CP operation. The narrow slit decouples the shared current paths between the feeding structures, further enhancing the port isolation. Owing to its single-layer structure, the fabricated antenna achieves a low profile of only 0.011λ0. Measured results show an IBW of 87.8% (2.98-7.65 GHz) and an ARBW of 66.9% (2.72-5.47 GHz). The proposed antenna achieves a wide bandwidth and low profile simultaneously, featuring a simple and easy-to-manufacture structure. Its operating band meets the requirements for coal mine communication systems. [ABSTRACT FROM AUTHOR]
ISSN:	19378718
DOI:	10.2528/PIERC26011405