A Multimode Antenna Design with Polarization Diversity
Zhang, Kai; Soh, Ping Jack; Wang, Mingjun; Yan, Sen (2025-05-21)
IEEE
21.05.2025
K. Zhang, P. J. Soh, M. Wang and S. Yan, "A Multimode Antenna Design with Polarization Diversity," 2025 19th European Conference on Antennas and Propagation (EuCAP), Stockholm, Sweden, 2025, pp. 1-4, doi: 10.23919/EuCAP63536.2025.10999237
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© 2025 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists,or reuse of any copyrighted component of this work in other works.
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202506164499
https://urn.fi/URN:NBN:fi:oulu-202506164499
Tiivistelmä
Abstract
In this article, a multimode antenna with polarization diversity is designed for smartwatch applications. The antenna structure consists of a circular watch frame and a circuit mainboard. Two ports are used to excite the antenna in odd and even modes, and polarization-diversity resonances are achieved. Additionally, a circular current is excited on one port to realize low-frequency multimode operation. Furthermore, high-order modes are excited by introducing slots in the circuit board, enabling multiband and multimode operation. The port 1 is working at 2.45 GHz, 4.1 GHz, and 5.8 GHz. And Port 2 works at 0.82 GHz 2.45 GHz, 4.1 GHz. and 5.8 for ISM band. The proposed antenna exhibits stable radiation patterns and high port isolation across multiple frequency bands, making it a promising candidate for next-generation smartwatch devices.
In this article, a multimode antenna with polarization diversity is designed for smartwatch applications. The antenna structure consists of a circular watch frame and a circuit mainboard. Two ports are used to excite the antenna in odd and even modes, and polarization-diversity resonances are achieved. Additionally, a circular current is excited on one port to realize low-frequency multimode operation. Furthermore, high-order modes are excited by introducing slots in the circuit board, enabling multiband and multimode operation. The port 1 is working at 2.45 GHz, 4.1 GHz, and 5.8 GHz. And Port 2 works at 0.82 GHz 2.45 GHz, 4.1 GHz. and 5.8 for ISM band. The proposed antenna exhibits stable radiation patterns and high port isolation across multiple frequency bands, making it a promising candidate for next-generation smartwatch devices.
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