Design analysis and validation of coaxial probe for tissue dielectric properties evaluation used in specific absorption rate measurement

ABSTRACT

This study distinguishes the design and analysis of a coaxial probe for measurement of biological body dielectric properties, in this measurement estimating the human tissue-equivalent liquid (TEL) permittivity and conductivity, to monitor and maintain the international standards for specific absorption rate (SAR) evaluation over the frequency band of 800 MHz-5 GHz. In addition, deionized (DI) water and ethanediol dielectric properties have been evaluated and the designed probe results compared to the commercial Dielectric Assessment kit (DAK) 3.5 probe. The obtained results are in good agreement with each other, moreover, the SAR calculation and each source of uncertainty budget analysis are estimated. Therefore, this fabricated probe may be suitable for liquid dielectric properties measurement.

KEYWORDS:

• Dielectric measurement
• TEL
• SAR
• open-ended coaxial probe
• liquid materials

Acknowledgments

The authors would like to thank Dr S. K. Dubey for the lab facility and Dr Rina Sharma, Director of NPL, for his constant motivation and support throughout this work and special thanks to CSIR-HRDG.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The author(s) reported that there is no funding associated with the work featured in this article.