Experimental and Numerical Study of Near-Field Gain of an Underwater Dipole Antenna at 6 GHz

Since information devices using high-frequency bands for 5G are expected to be widely used, there is an assessment method focusing on the specific absorption rate (SAR) as a conformity assessment method to ensure the safety of electromagnetic waves to the human body. This conformity assessment should be extended to frequencies below 6 GHz, referred to as sub-6 of 5G. In this paper, we experimentally confirm that the near-field gain of a dipole antenna can be estimated in pure water at 6 GHz for the purpose of realizing SAR probe calibration. Furthermore, these experimental results are compared with numerical results using the method of moments developed by Richmond.