Design of normal mode helical antenna for seawater.
To overcome the substantial propagation loss in the ocean, a low frequency band should be chosen when contemplating radio wave communication. Then, the antenna used at the portable radio equipment should be very small compare to the wavelength. For the miniaturized antenna, the normal mode helical a...
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Online Access: | http://eprints.utm.my/105719/1/SitiHarlizaMohdRazali2023_DesignofNormalModeHelicalAntenna.pdf http://eprints.utm.my/105719/ http://dx.doi.org/10.30880/ijie.2023.15.03.018 |
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my.utm.1057192024-05-13T07:17:39Z http://eprints.utm.my/105719/ Design of normal mode helical antenna for seawater. Mohd. Razali, Siti Harliza Ngah, Razali Kamardin, Kamilia Yamada, Yoshihide TK Electrical engineering. Electronics Nuclear engineering TK5101-6720 Telecommunication To overcome the substantial propagation loss in the ocean, a low frequency band should be chosen when contemplating radio wave communication. Then, the antenna used at the portable radio equipment should be very small compare to the wavelength. For the miniaturized antenna, the normal mode helical antenna (NMHA) is suitable because of achieving high efficiency. In this paper, design method of NMHA in the seawater condition (εr=81, σ=4) is explained. The frequency bands of 100MHz and 15MHz are selected. The self-resonant structures are determined based on the theoretical equation. Electrical characteristics such as resonant frequency, input impedance, VWSR and antenna efficiency are obtained through simulation by FEKO simulator. Electromagnetic simulation model is formed by taking into account the practical experimental condition. At 100MHz and 15MHz, resonances are ensured for antenna diameter lengths of 6.83 cm and 12.2 cm respectively. Input resistance of 27.15Ω and 94.14Ω, antenna efficiencies of -14.88dB and -26.27dB are achieved at 100MHz and 15MHz respectively. Penerbit UTHM 2023-08-15 Article PeerReviewed application/pdf en http://eprints.utm.my/105719/1/SitiHarlizaMohdRazali2023_DesignofNormalModeHelicalAntenna.pdf Mohd. Razali, Siti Harliza and Ngah, Razali and Kamardin, Kamilia and Yamada, Yoshihide (2023) Design of normal mode helical antenna for seawater. International Journal of Integrated Engineering, 15 (3). pp. 177-186. ISSN 2229-838X http://dx.doi.org/10.30880/ijie.2023.15.03.018 DOI: 10.30880/ijie.2023.15.03.018 |
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TK Electrical engineering. Electronics Nuclear engineering TK5101-6720 Telecommunication Mohd. Razali, Siti Harliza Ngah, Razali Kamardin, Kamilia Yamada, Yoshihide Design of normal mode helical antenna for seawater. |
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To overcome the substantial propagation loss in the ocean, a low frequency band should be chosen when contemplating radio wave communication. Then, the antenna used at the portable radio equipment should be very small compare to the wavelength. For the miniaturized antenna, the normal mode helical antenna (NMHA) is suitable because of achieving high efficiency. In this paper, design method of NMHA in the seawater condition (εr=81, σ=4) is explained. The frequency bands of 100MHz and 15MHz are selected. The self-resonant structures are determined based on the theoretical equation. Electrical characteristics such as resonant frequency, input impedance, VWSR and antenna efficiency are obtained through simulation by FEKO simulator. Electromagnetic simulation model is formed by taking into account the practical experimental condition. At 100MHz and 15MHz, resonances are ensured for antenna diameter lengths of 6.83 cm and 12.2 cm respectively. Input resistance of 27.15Ω and 94.14Ω, antenna efficiencies of -14.88dB and -26.27dB are achieved at 100MHz and 15MHz respectively. |
format |
Article |
author |
Mohd. Razali, Siti Harliza Ngah, Razali Kamardin, Kamilia Yamada, Yoshihide |
author_facet |
Mohd. Razali, Siti Harliza Ngah, Razali Kamardin, Kamilia Yamada, Yoshihide |
author_sort |
Mohd. Razali, Siti Harliza |
title |
Design of normal mode helical antenna for seawater. |
title_short |
Design of normal mode helical antenna for seawater. |
title_full |
Design of normal mode helical antenna for seawater. |
title_fullStr |
Design of normal mode helical antenna for seawater. |
title_full_unstemmed |
Design of normal mode helical antenna for seawater. |
title_sort |
design of normal mode helical antenna for seawater. |
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Penerbit UTHM |
publishDate |
2023 |
url |
http://eprints.utm.my/105719/1/SitiHarlizaMohdRazali2023_DesignofNormalModeHelicalAntenna.pdf http://eprints.utm.my/105719/ http://dx.doi.org/10.30880/ijie.2023.15.03.018 |
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