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<p>Wearable textile antennas are increasingly essential in modern wireless systems, including medical monitoring, healthcare, mobile communications, and military applications. These antennas are physically integrated into fabrics, giving the dielectric properties of the textile substrate a crucial element affecting antenna performance. Therefore, a proper understanding of substrate permittivity is crucial in achieving a successful antenna design for reliable operation under real-world conditions. This paper presents an efficient, yet simple method for determining the permittivity of army ripstop nylon fabric using an open-ended coaxial probe approach. The proposed configuration prioritizes simplicity, measurement accuracy, and compatibility with thin, flexible textile materials. To validate the reliability of the method, measurements were performed across multiple height probe-to-sample positions and on ripstop nylon fabrics produced in different manufacturing years. The comparative analysis illustrates how variations in measuring height and fabric batches affect permittivity, supporting the determination of a precise and consistent measurement configuration. These findings confirm the effectiveness of the proposed methodology and result in reliable permittivity values suitable for the design of wearable antennas on military ripstop nylon substrates.</p>

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Height-optimized dielectric characterization of different manufacturing year military camouflage ripstop nylon for wearable electronic application

  • 期刊论文

  • 发表日期：

    2026年2月10日

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  • M. Shamsul Amri Safiai,
  • Mohd Aziz Aris,
  • Nurul Huda Abd Rahman

摘要

Wearable textile antennas are increasingly essential in modern wireless systems, including medical monitoring, healthcare, mobile communications, and military applications. These antennas are physically integrated into fabrics, giving the dielectric properties of the textile substrate a crucial element affecting antenna performance. Therefore, a proper understanding of substrate permittivity is crucial in achieving a successful antenna design for reliable operation under real-world conditions. This paper presents an efficient, yet simple method for determining the permittivity of army ripstop nylon fabric using an open-ended coaxial probe approach. The proposed configuration prioritizes simplicity, measurement accuracy, and compatibility with thin, flexible textile materials. To validate the reliability of the method, measurements were performed across multiple height probe-to-sample positions and on ripstop nylon fabrics produced in different manufacturing years. The comparative analysis illustrates how variations in measuring height and fabric batches affect permittivity, supporting the determination of a precise and consistent measurement configuration. These findings confirm the effectiveness of the proposed methodology and result in reliable permittivity values suitable for the design of wearable antennas on military ripstop nylon substrates.