Analysis of Vertical Loop Antenna and Its Wide and Flat Variant Performance in Wearable Use
This paper presents an analysis of the input impedance and radiation pattern behavior for a rectangular loop antenna when it is reshaped from a narrow square to wide and flat. The antenna operation is examined by 3-D electromagnetic simulations. Parametric simulation results are shown to explain the...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IEEE
2018-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8333697/ |
| _version_ | 1818557084526968832 |
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| author | Markus Berg Jiangcheng Chen Aarno Parssinen |
| author_facet | Markus Berg Jiangcheng Chen Aarno Parssinen |
| author_sort | Markus Berg |
| collection | DOAJ |
| description | This paper presents an analysis of the input impedance and radiation pattern behavior for a rectangular loop antenna when it is reshaped from a narrow square to wide and flat. The antenna operation is examined by 3-D electromagnetic simulations. Parametric simulation results are shown to explain the effect of antenna dimensions on the impedance behavior. Based on the numerical results, an equivalent circuit is developed to model the impedance change due to reshaping the loop antenna. The main observations are that the decreased height and the increased width of the antenna increase the bandwidth potential of the inherently narrowband loop and increase its directivity. These characteristics together with a vertical loop orientation enable a high performance antenna for locations very close to conductive or lossy materials. Based on the presented impedance analysis, an optimized antenna prototype for a wearable use is manufactured and its performance is verified by measurements. Measured radiation efficiency for the antenna in contact with a human tissue phantom is -5.0 dB at 2 GHz and the obtainable bandwidth potential is >10%. |
| first_indexed | 2024-12-13T23:55:23Z |
| format | Article |
| id | doaj.art-731594da8e604277905ceccb184a2665 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-13T23:55:23Z |
| publishDate | 2018-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-731594da8e604277905ceccb184a26652022-12-21T23:26:34ZengIEEEIEEE Access2169-35362018-01-016225702257710.1109/ACCESS.2018.28245428333697Analysis of Vertical Loop Antenna and Its Wide and Flat Variant Performance in Wearable UseMarkus Berg0https://orcid.org/0000-0001-9896-9108Jiangcheng Chen1Aarno Parssinen2Centre for Wireless Communications, Faculty of Information Technology and Electrical Engineering, University of Oulu, Oulu, FinlandCentre for Wireless Communications, Faculty of Information Technology and Electrical Engineering, University of Oulu, Oulu, FinlandCentre for Wireless Communications, Faculty of Information Technology and Electrical Engineering, University of Oulu, Oulu, FinlandThis paper presents an analysis of the input impedance and radiation pattern behavior for a rectangular loop antenna when it is reshaped from a narrow square to wide and flat. The antenna operation is examined by 3-D electromagnetic simulations. Parametric simulation results are shown to explain the effect of antenna dimensions on the impedance behavior. Based on the numerical results, an equivalent circuit is developed to model the impedance change due to reshaping the loop antenna. The main observations are that the decreased height and the increased width of the antenna increase the bandwidth potential of the inherently narrowband loop and increase its directivity. These characteristics together with a vertical loop orientation enable a high performance antenna for locations very close to conductive or lossy materials. Based on the presented impedance analysis, an optimized antenna prototype for a wearable use is manufactured and its performance is verified by measurements. Measured radiation efficiency for the antenna in contact with a human tissue phantom is -5.0 dB at 2 GHz and the obtainable bandwidth potential is >10%.https://ieeexplore.ieee.org/document/8333697/Equivalent circuitloop impedancesmall loopuser influence |
| spellingShingle | Markus Berg Jiangcheng Chen Aarno Parssinen Analysis of Vertical Loop Antenna and Its Wide and Flat Variant Performance in Wearable Use IEEE Access Equivalent circuit loop impedance small loop user influence |
| title | Analysis of Vertical Loop Antenna and Its Wide and Flat Variant Performance in Wearable Use |
| title_full | Analysis of Vertical Loop Antenna and Its Wide and Flat Variant Performance in Wearable Use |
| title_fullStr | Analysis of Vertical Loop Antenna and Its Wide and Flat Variant Performance in Wearable Use |
| title_full_unstemmed | Analysis of Vertical Loop Antenna and Its Wide and Flat Variant Performance in Wearable Use |
| title_short | Analysis of Vertical Loop Antenna and Its Wide and Flat Variant Performance in Wearable Use |
| title_sort | analysis of vertical loop antenna and its wide and flat variant performance in wearable use |
| topic | Equivalent circuit loop impedance small loop user influence |
| url | https://ieeexplore.ieee.org/document/8333697/ |
| work_keys_str_mv | AT markusberg analysisofverticalloopantennaanditswideandflatvariantperformanceinwearableuse AT jiangchengchen analysisofverticalloopantennaanditswideandflatvariantperformanceinwearableuse AT aarnoparssinen analysisofverticalloopantennaanditswideandflatvariantperformanceinwearableuse |