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April 2005 [Test & Measurement] Method Validates SAR Measurement Systems Specific-absorption-rate (SAR) measurements are critical for understanding the effects of nonionizing radiation, such as the emissions from cellular telephones and cellular base stations, on humans and other biological organisms. As noted last month, a modified waveguide-source technique can help to validate the test systems used for SAR measurements when used in the range from 5 to 6 GHz. Part 2 of this article will show how this technique can help minimize measurement inaccuracies due to... March 2005 [Test & Measurement] Method Validates SAR Measurement Systems Safety standards for setting acceptable levels of nonionizing radiation have been established for operating frequencies to 3 GHz.1-3 While such standards cover a wide range of wireless devices, a growing number of consumer wireless devices operate in the range from 5 to 6 GHz, even in the absence of international testing standards. The key metric for assessing wireless devices used in proximity to the body is the specific absorption rate (SAR), which can be expressed in units of... |
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