{"id":356162,"date":"2024-03-08T20:10:35","date_gmt":"2024-03-08T20:10:35","guid":{"rendered":"\/forum\/forums\/topic\/the-peak-spatially-averaged-sar-over-1gr-or-10gr-of-tissue\/"},"modified":"2024-03-08T20:10:35","modified_gmt":"2024-03-08T20:10:35","slug":"the-peak-spatially-averaged-sar-over-1gr-or-10gr-of-tissue","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/the-peak-spatially-averaged-sar-over-1gr-or-10gr-of-tissue\/","title":{"rendered":"The peak spatially-averaged SAR over 1gr or 10gr of tissue"},"content":{"rendered":"<p>Hello Support,<\/p>\n<p>I have an antenna and I want to calculate peak spatially-averaged SAR over 1gr of tissue to check this value with the recommended value in safety code documents. I am not using the phantom provided by HFSS. I simply defined and put my lossy mediums in direct contact with my antenna. I have 4 layers, absorber-skin-heterogenous medium (category D)-skin defined in my simulation. I extracted the tangent loss, permittivity and mass density of these mediums based on the literature. The absorber is 10 mm, the skin is 2mm and the heterogenous medium is 52 mm. I want to calculate peak spatially-averaged SAR over 1gr of tissue in the skin and heterogeneous medium.&nbsp; How should I do it in HFSS?<\/p>\n<p>Does the average SAR on my desired volume (ex. skin layer)&nbsp;correspond to peak spatially-averaged SAR over 1gr of tissue?<\/p>\n<p>or should I define SAR certification? If I have to use SAR certification which option do I have to select in SAR setting: gridless or IEC\/IEEE 62704-4? when I chose IEC\/IEEE 62704-4 I got this warning and insensible plot:<br \/>&nbsp; [warning] IEC\/IEEE 62704-4 peak spatial-average SAR computation did not converge, with a relative error of -0.300127435578155.&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/08-03-2024-1709928400-mceclip1.png\" width=\"364\" height=\"243\"><\/p>\n<p>I tried this request for the heterogenous medium (Category D), same thing happened.<\/p>\n<p>I will be grateful if you help me with this calculation and my concerns and questions asked above.<\/p>\n<p>kind regards,<\/p>\n<p>Nooshin<\/p>\n","protected":false},"template":"","class_list":["post-356162","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello Support,I have an antenna and I want to calculate peak spatially-averaged SAR over 1gr of tissue to check this value with the recommended value in safety code documents. 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I am not using the phantom provided by HFSS. I simply defined and put my lossy mediums in direct contact with my antenna. 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I am not using the phantom provided by HFSS. I simply defined and put my lossy mediums in direct contact with my antenna. 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