Simulation and Analysis of a Reconfigurable Electrically Small Antenna System for Compact Wearable Devices
Takanen, Niklas; Rasilainen, Kimmo; Katajisto, Juha; Pärssinen, Aarno; Soh, Ping Jack (2025-05-21)
IEEE
21.05.2025
N. Takanen, K. Rasilainen, J. Katajisto, A. Pärssinen and P. J. Soh, "Simulation and Analysis of a Reconfigurable Electrically Small Antenna System for Compact Wearable Devices," 2025 19th European Conference on Antennas and Propagation (EuCAP), Stockholm, Sweden, 2025, pp. 1-5, doi: 10.23919/EuCAP63536.2025.10999808
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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-202506164497
https://urn.fi/URN:NBN:fi:oulu-202506164497
Tiivistelmä
Abstract
This work analyses a reconfigurable electrically small antenna (ESA) system operating in a limited design space at multiple 5G-NR bands (901–933 MHz and 1.635-2.1 GHz) in a switchable form under an area constraint of 63.2x25 mm 2 (0.19xO.07 λ 2). First, the area constraints and operating frequencies are analysed using the Chu-Harrington limit, followed by a study of the surface currents of the ESA and chassis using characteristic mode analysis. Then, a matching circuit is designed and integrated to enable both aperture tuning and input matching of the antenna. Simulations results indicated a single band operation at 901-923MHz (2.4BW%) in configuration 1, and a dual band operation at 914-933MHz (2BW%) and at 1.635-2.1 GHz (12.4 BW %) in configuration 2. Finally, specific absorption rate is of the ESA is studied, indicating levels of 0.2-0.4 W /kg (averaged over 1 g of tissue).
This work analyses a reconfigurable electrically small antenna (ESA) system operating in a limited design space at multiple 5G-NR bands (901–933 MHz and 1.635-2.1 GHz) in a switchable form under an area constraint of 63.2x25 mm 2 (0.19xO.07 λ 2). First, the area constraints and operating frequencies are analysed using the Chu-Harrington limit, followed by a study of the surface currents of the ESA and chassis using characteristic mode analysis. Then, a matching circuit is designed and integrated to enable both aperture tuning and input matching of the antenna. Simulations results indicated a single band operation at 901-923MHz (2.4BW%) in configuration 1, and a dual band operation at 914-933MHz (2BW%) and at 1.635-2.1 GHz (12.4 BW %) in configuration 2. Finally, specific absorption rate is of the ESA is studied, indicating levels of 0.2-0.4 W /kg (averaged over 1 g of tissue).
Kokoelmat
- Avoin saatavuus [38865]