What question did this study set out to answer?

To analyze the radiation patterns, impedance, and overall performance of electrically small monopole antennas coated with dielectric or ferrite materials.

January 1, 1978Proceedings of the Institution of Electrical Engineers

Electrically short monopole antennas with dielectric or ferrite coatings

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Authors

JJJ.R. JamesLoyola University Medical Center AHA. HendersonMPC Computers (United States)

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Implication

Theoretical modeling demonstrates resonant-cavity effects in material-clad short monopole antennas, indicating that balanced permeability and permittivity optimize radiation performance.

Key Points

To analyze the radiation patterns, impedance, and overall performance of electrically small monopole antennas coated with dielectric or ferrite materials.
Represented electromagnetic fields using discrete and continuous eigenvalue spectrums.
Applied variational methods to solve mode coupling at both the feed and terminal planes across varying frequencies and electrical sizes.
Validated theoretical calculations through direct comparison with measured antenna performance.
Found that material cladding induces a dominant quarter-wavelength resonant-cavity effect, transforming terminal leakage radiation into low impedance at the feed.
Achieved close agreement between computed values and empirical measurements for bandwidth, input impedance, and radiation patterns.
Identified that optimal antenna performance requires low-loss materials with balanced, comparable values of relative permeability and permittivity.

Cite This Study

James et al. (1978) studied this question.

synapsesocial.com/papers/6a73755a96bd0fc833c1e753 https://doi.org/10.1049/piee.1978.0192

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Implication

Theoretical modeling demonstrates resonant-cavity effects in material-clad short monopole antennas, indicating that balanced permeability and permittivity optimize radiation performance.

Electrically short monopole antennas with dielectric or ferrite coatings

Discussion

Member takes

Implication

Key Points

Cite This Study

Electrically short monopole antennas with dielectric or ferrite coatings

Discussion

Member takes

Implication

Key Points

Cite This Study

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