Constant near-field gain for a shielded loop antenna operated in the liquid at 30 MHz

Author

Takezawa, Ryosuke ; Tsuruma, Satsuki ; Ishii, Naohiro ; Hamada, Lira ; Watanabe, Shigetaka

Author_Institution

Grad. Sch. of Sci. & Technol., Niigata Univ., Niigata, Japan

fYear

2014

fDate

4-6 Aug. 2014

Firstpage

72

Lastpage

73

Abstract

For calibrating electric-field probe to evaluate the value of SAR (specific absorption rate) for devices at a frequency of 30 MHz, a shielded loop antenna is used as a reference antenna. To facilitate curve fitting for the calibration, near-field gain should be constant near the loop. In this paper, it is shown that the circumference of the loop can be selected as the near-field gain becomes approximately-constant near the loops.

Keywords

VHF antennas; approximation theory; calibration; curve fitting; electric fields; loop antennas; shielding; SAR value evaluation; constant near-field gain; curve fitting; electric-field probe calibration; frequency 30 MHz; reference antenna; shielded loop antenna; specific absorption rate; tissue-equivalent liquid; Antenna measurements; Dipole antennas; Gain; Gain measurement; Magnetic liquids; Probes; SAR; near-field gain; probe calibration; shielded loop antenna; tissue-equivalent liquid;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetics (iWEM), 2014 IEEE International Workshop on

Conference_Location

Sapporo

Type

conf

DOI

10.1109/iWEM.2014.6963641

Filename

6963641