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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Antennas designed for radiation resistance of on a specific frequency using values of 1, 5, and 9 for the factor. The higher the factor, the less the antenna width for the same resonance frequency and radiation resistance, resulting in a more linear structure.