A Dual-Band Multi-Linear Polarization Reconfigurable Antenna for Body-Centric Wireless Communication Systems
A novel dual-band multi-linear polarization reconfigurable (MLPR) antenna for body-centric wireless communication systems (BWCS) is presented in this paper. The design comprises five symmetrically arranged multi-branch radiating units, each integrating an elliptical patch and curved spring branch fo...
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2025-06-01
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| author | Dingzhao Chen Foxiang Liu Xuexuan Ruan Yanhui Liu |
| author_facet | Dingzhao Chen Foxiang Liu Xuexuan Ruan Yanhui Liu |
| author_sort | Dingzhao Chen |
| collection | DOAJ |
| description | A novel dual-band multi-linear polarization reconfigurable (MLPR) antenna for body-centric wireless communication systems (BWCS) is presented in this paper. The design comprises five symmetrically arranged multi-branch radiating units, each integrating an elliptical patch and curved spring branch for the Medical Implant Communication Service (MICS) band (403–405 MHz), and a pair of orthogonal strip patches for the Industrial, Scientific and Medical (ISM) <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>2.45</mn></mrow></semantics></math></inline-formula> GHz band (2.40–2.48 GHz). By selectively biasing PIN diodes between each unit and a central pentagonal feed, five distinct LP states with polarization directions of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>0</mn><mo>∘</mo></msup></semantics></math></inline-formula>, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>72</mn><mo>∘</mo></msup></semantics></math></inline-formula>, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>144</mn><mo>∘</mo></msup></semantics></math></inline-formula>, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>216</mn><mo>∘</mo></msup></semantics></math></inline-formula>, and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>288</mn><mo>∘</mo></msup></semantics></math></inline-formula> are achieved. A dual-line isolation structure is introduced to suppress mutual coupling between radiating units, ensuring cross-polarization levels (XPLs) better than <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>−</mo><mn>15.0</mn></mrow></semantics></math></inline-formula> dB across the operation bands. Prototypes fabricated on a <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>160</mn><mo>×</mo><mn>160</mn><mo>×</mo><mn>1.5</mn></mrow></semantics></math></inline-formula> mm<sup>3</sup> substrate demonstrate measured <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mrow><mo>|</mo></mrow><msub><mi>S</mi><mn>11</mn></msub><mrow><mo>|</mo><mo><</mo><mo>−</mo><mn>10</mn></mrow></mrow></semantics></math></inline-formula> dB across 401–409 MHz and 2.34–2.53 GHz and stable omnidirectional patterns despite biasing circuitry perturbations. The compact form and robust dual-band, multi-polarization performance make the proposed antenna a promising candidate for implantable device wake-up signals and on-body data links in dense indoor environments. |
| format | Article |
| id | doaj-art-913bb03d1a984147aa5098c90aa7535c |
| institution | Kabale University |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
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| series | Sensors |
| spelling | doaj-art-913bb03d1a984147aa5098c90aa7535c2025-08-20T03:27:39ZengMDPI AGSensors1424-82202025-06-012512363010.3390/s25123630A Dual-Band Multi-Linear Polarization Reconfigurable Antenna for Body-Centric Wireless Communication SystemsDingzhao Chen0Foxiang Liu1Xuexuan Ruan2Yanhui Liu3Yangtze Delta Region Institute (Quzhou), University of Electronic Science and Technology of China (UESTC), Quzhou 324000, ChinaSchool of Information Engineering, Nanchang University, Nanchang 330029, ChinaYangtze Delta Region Institute (Quzhou), University of Electronic Science and Technology of China (UESTC), Quzhou 324000, ChinaYangtze Delta Region Institute (Quzhou), University of Electronic Science and Technology of China (UESTC), Quzhou 324000, ChinaA novel dual-band multi-linear polarization reconfigurable (MLPR) antenna for body-centric wireless communication systems (BWCS) is presented in this paper. The design comprises five symmetrically arranged multi-branch radiating units, each integrating an elliptical patch and curved spring branch for the Medical Implant Communication Service (MICS) band (403–405 MHz), and a pair of orthogonal strip patches for the Industrial, Scientific and Medical (ISM) <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>2.45</mn></mrow></semantics></math></inline-formula> GHz band (2.40–2.48 GHz). By selectively biasing PIN diodes between each unit and a central pentagonal feed, five distinct LP states with polarization directions of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>0</mn><mo>∘</mo></msup></semantics></math></inline-formula>, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>72</mn><mo>∘</mo></msup></semantics></math></inline-formula>, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>144</mn><mo>∘</mo></msup></semantics></math></inline-formula>, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>216</mn><mo>∘</mo></msup></semantics></math></inline-formula>, and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>288</mn><mo>∘</mo></msup></semantics></math></inline-formula> are achieved. A dual-line isolation structure is introduced to suppress mutual coupling between radiating units, ensuring cross-polarization levels (XPLs) better than <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>−</mo><mn>15.0</mn></mrow></semantics></math></inline-formula> dB across the operation bands. Prototypes fabricated on a <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>160</mn><mo>×</mo><mn>160</mn><mo>×</mo><mn>1.5</mn></mrow></semantics></math></inline-formula> mm<sup>3</sup> substrate demonstrate measured <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mrow><mo>|</mo></mrow><msub><mi>S</mi><mn>11</mn></msub><mrow><mo>|</mo><mo><</mo><mo>−</mo><mn>10</mn></mrow></mrow></semantics></math></inline-formula> dB across 401–409 MHz and 2.34–2.53 GHz and stable omnidirectional patterns despite biasing circuitry perturbations. The compact form and robust dual-band, multi-polarization performance make the proposed antenna a promising candidate for implantable device wake-up signals and on-body data links in dense indoor environments.https://www.mdpi.com/1424-8220/25/12/3630polarization reconfigurable antennamonopole antennadual-band antenna |
| spellingShingle | Dingzhao Chen Foxiang Liu Xuexuan Ruan Yanhui Liu A Dual-Band Multi-Linear Polarization Reconfigurable Antenna for Body-Centric Wireless Communication Systems Sensors polarization reconfigurable antenna monopole antenna dual-band antenna |
| title | A Dual-Band Multi-Linear Polarization Reconfigurable Antenna for Body-Centric Wireless Communication Systems |
| title_full | A Dual-Band Multi-Linear Polarization Reconfigurable Antenna for Body-Centric Wireless Communication Systems |
| title_fullStr | A Dual-Band Multi-Linear Polarization Reconfigurable Antenna for Body-Centric Wireless Communication Systems |
| title_full_unstemmed | A Dual-Band Multi-Linear Polarization Reconfigurable Antenna for Body-Centric Wireless Communication Systems |
| title_short | A Dual-Band Multi-Linear Polarization Reconfigurable Antenna for Body-Centric Wireless Communication Systems |
| title_sort | dual band multi linear polarization reconfigurable antenna for body centric wireless communication systems |
| topic | polarization reconfigurable antenna monopole antenna dual-band antenna |
| url | https://www.mdpi.com/1424-8220/25/12/3630 |
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