Design and Optimization of a Flexible Antenna for ISM Band Wearable Devices via Inset Slot Integration and Parasitic Elements
This paper aims to analyze and optimize the electrical properties of a flexible antenna to maximize its potential. The antenna's performance is enhanced by incorporating inset slots on both the patch and ground plane, as well as utilizing parasitic elements to improve the resonant frequency an...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IIUM Press, International Islamic University Malaysia
2025-05-01
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| Series: | International Islamic University Malaysia Engineering Journal |
| Subjects: | |
| Online Access: | https://journals.iium.edu.my/ejournal/index.php/iiumej/article/view/3463 |
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| Summary: | This paper aims to analyze and optimize the electrical properties of a flexible antenna to maximize its potential. The antenna's performance is enhanced by incorporating inset slots on both the patch and ground plane, as well as utilizing parasitic elements to improve the resonant frequency and achieve a wider bandwidth. The flexible antenna is designed to resonate within the Industrial, Scientific, and Medical (ISM) frequency band of 5.725–5.875 GHz, using Rogers RO4003C with a dielectric constant of 3.55 and dimensions of 20 × 25 × 0.2032 mm³. The proposed antenna demonstrates promising results, with S11 of -37.05 dB at 5.78 GHz, and a bandwidth of 158 MHz, ranging from 5.739–5.897 GHz. The usable ISM bandwidth is 136 MHz, representing 90.67% of the ISM frequency band. Theoretical, simulation, and experimental analyses confirm that embedding slots on the patch or ground plane, along with the use of parasitic elements, significantly enhances the antenna's resonant frequency, bandwidth, and efficiency. Because of its flexibility, improved resonant frequency, and wide bandwidth, this antenna has potential uses in the ISM frequency band to enable faster and more efficient data transmission.
ABSTRAK: Kajian ini bertujuan bagi menganalisa dan mengoptimum sifat elektrik antena fleksibel bagi memaksimum potensinya. Ciri-ciri antena dipertingkatkan lagi dengan penggunaan slot sisipan pada tampalan dan satah tanah, dan menggunakan elemen parasitik bagi meningkatkan frekuensi resonan dan mencapai lebar jalur yang lebih luas. Antena fleksibel ini direka untuk frekuensi Industri, Saintifik dan Perubatan (ISM) iaitu pada frekuensi 5.725–5.875 GHz menggunakan Rogers RO4003C dengan pemalar dielektrik 3.55 dan dimensi 20 × 25 × 0.2032 mm³. Antena yang dicadangkan ini menunjukkan hasil yang baik dengan S11 -37.05 dB pada frekuensi 5.78 GHz, dan jalur lebar 158 MHz, dalam julat 5.739–5.897 GHz. Jalur lebar ISM mencapai 136 MHz iaitu bersamaan 90.67% jalur frekuensi ISM. Analisis teori, simulasi dan eksperimen membuktikan bahawa penggunaan slot pada tampalan atau di atas satah tanah, bersama elemen parasitik dapat membantu meningkatkan frekuensi resonan, lebar jalur dan kecekapan antena. Oleh kerana fleksibilitinya, frekuensi resonan meningkat dan jalur lebar bertambah luas. Antena ini berpotensi bagi penggunaan jalur frekuensi ISM dengan penghantaran data yang lebih pantas dan cekap.
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| ISSN: | 1511-788X 2289-7860 |