SAR Testing Standards

 The SAR testing requirement is being added to many countries around the world. Numerous countries are in the process of evaluating the need to add SAR testing to their requirements.

Specific Absorption Rate (SAR) is the unit of measurement for the amount of Radio Frequency (RF) absorbed by the body when using a wireless device. The SAR value is expressed in terms of watts per kilogram (W/kg) or milliwatts per gram (mW/g). The RF exposure limits used are expressed in the terms of SAR, which is a measure of the electric and magnetic field strength and power density for transmitters operating at frequencies from 300 kHz to 100 GHz. The FCC and other federal governmental agencies around the world require that any wireless device be evaluated to meet the RF exposure limits set forth in the governmental SAR regulations.

The most generally accepted method for measuring SAR values is the direct method SAR test. This method utilizes a model called a “SAM phantom” to simulate the human head and a “flat phantom” to simulate the human body. With this method, wireless devices are tested at the highest certified power level in laboratory conditions utilizing a SAR test system with a robot. An orthogonal probe is mounted on the robot arm to measure the RF fields transmitted into a calibrated tissue simulant.

Presentation given during SAR Basics training to provide a foundation for RF Exposure issues in the FCC/ISED requirements.

The TCB Council Fall 2017 Workshop, held October 31 – November 2, 2017 in Baltimore, Maryland.

Chicago Tribune Investigations By Sam Roe (AUG 2019)

We tested popular cellphones for Radio Frequency radiation. Now the FCC is investigating.

The Tribune’s tests were conducted by RF Exposure Lab, a facility in San Marcos, Calif., that is recognized by the FCC as accredited to test for Radio Frequency radiation from electronic devices. For 15 years, the lab has done radiation testing for wireless companies seeking government approval for new products.

Does your cell phone case increase your radiation risk? (2015)

Dr. Oz talked to RF Exposure Lab owner Jay Moulton to find out how consumers can reduce their risk of radiation exposure when using cell phones. Dr. Oz also discusses studies claiming that cell phone radiation is harmful to the body and how it can affect consumers.

Dr. James “Butch” Rosser – Investigates cell phone regulations

Dr. James "Butch Rosser - Factors that affect cell phone radiation
with RF Exposure Lab - Jay Moulton

Do cell phone cases protect you from Radiation?
with RF Exposure Lab - Jay Moulton

Why you shouldn't put your phone in your bra.

10 News San Diego Report (2010)

RF Exposure Lab, SAR testing facility in San Marcos, was contacted by 10 News in San Diego. 10 News was doing an investigative report on SAR testing and SAR values due to the proposed legislation in California.