Design and Validation of a Compact Dual-Band Bluetooth Antenna for Smartwatch Applications

Sravan K. R. Vuyyuru; Mohamed Räsänen; Jan H. S. Bergman; Jari Holopainen

doi:10.23919/EuCAP63536.2025.10999952

Design and Validation of a Compact Dual-Band Bluetooth Antenna for Smartwatch Applications

Sravan K. R. Vuyyuru, Mohamed Räsänen, Jan H. S. Bergman, Jari Holopainen

Nokia Bell Labs Finland

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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Abstract

This paper presents the compact dual-band non-planar, miniature Bluetooth antenna design for smartwatches targeting 2.45/5.8 GHz operation. The antenna features a straightforward structure that enhances bandwidth and efficiency without external matching circuits, addressing challenges like miniaturization using inductive meander lines, performance degradation due to human-body proximity, radiation obstruction from metal bezels, and strict size constraints, all while maintaining dual-band operation. The combination of an I-shaped monopole and an inverted U-shaped stripline demonstrates dual-resonance behavior, and simulations closely align with experimental measurements conducted at the microwave lab and StarLAB facility. The gain analysis demonstrates the antenna's ability to provide a Bluetooth range of 30 meters at 2.45 GHz and 10 meters at 5.8 GHz, supporting next-generation smartwatch integration with reliable connectivity.

Original language	English
Title of host publication	EuCAP 2025 - 19th European Conference on Antennas and Propagation
Publisher	IEEE
Pages	1-5
Number of pages	5
ISBN (Print)	979-8-3503-6632-7
DOIs	https://doi.org/10.23919/EuCAP63536.2025.10999952
Publication status	Published - 21 May 2025
MoE publication type	A4 Conference publication
Event	European Conference on Antennas and Propagation - Stockholm, Sweden, Stockholm, Sweden Duration: 30 Mar 2025 → 4 Apr 2025 Conference number: 19

Conference

Conference	European Conference on Antennas and Propagation
Abbreviated title	EuCAP
Country/Territory	Sweden
City	Stockholm
Period	30/03/2025 → 04/04/2025

Keywords

Antenna feeds
Antenna measurements
Antenna radiation patterns
Antennas
Bluetooth
Dual band
Integrated circuit modeling
Meters
Performance evaluation
Stripline

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10.23919/EuCAP63536.2025.10999952

Design_and_Validation_of_a_Compact_Dual-Band_Bluetooth_Antenna_for_Smartwatch_ApplicationsAccepted author manuscript, 584 KB

https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10999952

Cite this

@inproceedings{17084e6daa714877a45febad0666b25f,

title = "Design and Validation of a Compact Dual-Band Bluetooth Antenna for Smartwatch Applications",

abstract = "This paper presents the compact dual-band non-planar, miniature Bluetooth antenna design for smartwatches targeting 2.45/5.8 GHz operation. The antenna features a straightforward structure that enhances bandwidth and efficiency without external matching circuits, addressing challenges like miniaturization using inductive meander lines, performance degradation due to human-body proximity, radiation obstruction from metal bezels, and strict size constraints, all while maintaining dual-band operation. The combination of an I-shaped monopole and an inverted U-shaped stripline demonstrates dual-resonance behavior, and simulations closely align with experimental measurements conducted at the microwave lab and StarLAB facility. The gain analysis demonstrates the antenna's ability to provide a Bluetooth range of 30 meters at 2.45 GHz and 10 meters at 5.8 GHz, supporting next-generation smartwatch integration with reliable connectivity.",

keywords = "Antenna feeds, Antenna measurements, Antenna radiation patterns, Antennas, Bluetooth, Dual band, Integrated circuit modeling, Meters, Performance evaluation, Stripline",

author = "Vuyyuru, {Sravan K. R.} and Mohamed R{\"a}s{\"a}nen and Bergman, {Jan H. S.} and Jari Holopainen",

note = "| openaire: EC/H2020/956256/EU//META WIRELESS; European Conference on Antennas and Propagation, EuCAP ; Conference date: 30-03-2025 Through 04-04-2025",

year = "2025",

month = may,

day = "21",

doi = "10.23919/EuCAP63536.2025.10999952",

language = "English",

isbn = "979-8-3503-6632-7",

pages = "1--5",

booktitle = "EuCAP 2025 - 19th European Conference on Antennas and Propagation",

publisher = "IEEE",

address = "United States",

}

Vuyyuru, SKR , Räsänen, M , Bergman, JHS & Holopainen, J 2025, Design and Validation of a Compact Dual-Band Bluetooth Antenna for Smartwatch Applications. in EuCAP 2025 - 19th European Conference on Antennas and Propagation., 10999952, IEEE, pp. 1-5, European Conference on Antennas and Propagation, Stockholm, Sweden, 30/03/2025. https://doi.org/10.23919/EuCAP63536.2025.10999952

Design and Validation of a Compact Dual-Band Bluetooth Antenna for Smartwatch Applications. / Vuyyuru, Sravan K. R.; Räsänen, Mohamed ; Bergman, Jan H. S. et al.
EuCAP 2025 - 19th European Conference on Antennas and Propagation. IEEE, 2025. p. 1-5 10999952.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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AU - Holopainen, Jari

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PY - 2025/5/21

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AB - This paper presents the compact dual-band non-planar, miniature Bluetooth antenna design for smartwatches targeting 2.45/5.8 GHz operation. The antenna features a straightforward structure that enhances bandwidth and efficiency without external matching circuits, addressing challenges like miniaturization using inductive meander lines, performance degradation due to human-body proximity, radiation obstruction from metal bezels, and strict size constraints, all while maintaining dual-band operation. The combination of an I-shaped monopole and an inverted U-shaped stripline demonstrates dual-resonance behavior, and simulations closely align with experimental measurements conducted at the microwave lab and StarLAB facility. The gain analysis demonstrates the antenna's ability to provide a Bluetooth range of 30 meters at 2.45 GHz and 10 meters at 5.8 GHz, supporting next-generation smartwatch integration with reliable connectivity.

KW - Antenna feeds

KW - Antenna measurements

KW - Antenna radiation patterns

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KW - Dual band

KW - Integrated circuit modeling

KW - Meters

KW - Performance evaluation

KW - Stripline

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T2 - European Conference on Antennas and Propagation

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ER -

Design and Validation of a Compact Dual-Band Bluetooth Antenna for Smartwatch Applications

Abstract

Conference

Keywords

Access to Document

Other files and links

Fingerprint

DoD T40404: Self-Programmable Metasurface Networks for Wireless Communications and IoT

META WIRELESS MSCA: Future Wireless Communications Empowered by Reconfigurable Intelligent Meta-Materials

Aalto Electronics-ICT

Cite this

Design and Validation of a Compact Dual-Band Bluetooth Antenna for Smartwatch Applications

Abstract

Conference

Keywords

Access to Document

Other files and links

Fingerprint

Projects

DoD T40404: Self-Programmable Metasurface Networks for Wireless Communications and IoT

META WIRELESS MSCA: Future Wireless Communications Empowered by Reconfigurable Intelligent Meta-Materials

Equipment

Aalto Electronics-ICT

Cite this