On the electromagnetic characteristics of dipole antennas at MF/HF/VHF/UHF

Adekola, S. Adeniyi; Adewuyi, Victor

doi:10.1109/nigercon.2017.8281881

2017 IEEE 3rd International Conference on Electro-Technology for National Development (NIGERCON) 2017

DOI: 10.1109/nigercon.2017.8281881

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On the electromagnetic characteristics of dipole antennas at MF/HF/VHF/UHF

S. Adeniyi Adekola

Victor Adewuyi

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2024

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Cited by 2 publications

References 6 publications

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Shared-radiator design of broadband and dual-mode antenna for personal role radio applications

Wang,

Zhu,

Xie

et al. 2024

Frequenz

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Shared-radiator design of a broadband and dual-mode antenna that simultaneously covers the VHF/UHF band and satellite navigation band is presented for personal role radio (PRR) applications. Quadrifilar helix antenna (QHA) is devised to be a circularly polarized radiator which as well acts as a part of the upper half radiation arm of the dipole antenna and be equivalent to a linearly polarized radiation current carrier at VHF/UHF band, forming a symmetrical dipole antenna with a sinusoidal current distribution. A 5th-order balanced matching network comprised of five cascade L-sections is adopted to obtain the maximum possible working band-width and a 3.76:1 band-width (116 %) at VHF/UHF band is achieved. Strong mutual coupling effect of the two operating modes is observed near 1.5 GHz originated from QHA shared-radiator design, and a new balun structure is applied to achieve high isolation and self-decoupling, subsequently |S21| of the two operating modes is significantly reduced from about −18 dB to below −32 dB at satellite navigation band without affecting the reflection coefficient and radiation efficiency. The measured results show that radiation patterns of the manufactured prototype is basically consistent with corresponding simulation counterparts.

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Shared-radiator design of broadband and dual-mode antenna for personal role radio applications

Wang,

Zhu,

Xie

et al. 2024

Frequenz

View full text Add to dashboard Cite

show abstract

Design Analysis of Array of Dipole Transmitters for Wireless Power Transfer

Miantezila

Adewuyi

Owoola

2022

EMITTER Int'l J. of Engin. Technol.

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Considered in this work are the radiation aspects of a radio-frequency wireless power transfer system. Using the halfwave dipole as a candidate of choice, the current distribution on the antenna is first evaluated and presented using the versatile electromagnetic numerical Method of Moment technique (MoM). Using the current distribution obtained from the kernel of integration, the radiation fields for the single dipole element was obtained. Also, the analysis is extended to uniformly space linear antenna arrays using broadside and ordinary endfire arrays as candidates of interest. The simulation results for the broadside and endfire arrays were presented for 5, 6, 7, 10, 20 and 30 array elements at 0.3, 0.4 and 0.5 inter-element spacing. The peak directivity of broadside array occurs at 30 elements, 0.5λ spacing, and exceeds endfire array peak directivity by 11.27%. In addition to the advantage of an improved directivity achieved by the 7-element broadside array, an improved peak sidelobe level (PSLL) with the lowest PSLL for 7, 20, and 30 elements broadside array occurring at -12.0534 dB, -12.4298 dB, -12.6642 dB, -13.2246 dB, and -13.2747 dB respectively.

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On the electromagnetic characteristics of dipole antennas at MF/HF/VHF/UHF

Cited by 2 publications

References 6 publications

Shared-radiator design of broadband and dual-mode antenna for personal role radio applications

Shared-radiator design of broadband and dual-mode antenna for personal role radio applications

Design Analysis of Array of Dipole Transmitters for Wireless Power Transfer

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