{"id":275850,"date":"2023-03-22T11:31:40","date_gmt":"2023-03-22T11:31:40","guid":{"rendered":"\/forum\/forums\/topic\/pml-vs-metal-boundary-condition-gives-different-value-of-the-propagation-loss\/"},"modified":"2023-03-22T11:31:40","modified_gmt":"2023-03-22T11:31:40","slug":"pml-vs-metal-boundary-condition-gives-different-value-of-the-propagation-loss","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/pml-vs-metal-boundary-condition-gives-different-value-of-the-propagation-loss\/","title":{"rendered":"PML vs metal  boundary condition  gives different value of the propagation loss"},"content":{"rendered":"<p>I am trying to calculate the propagation loss in the Si Nitride waveguide (Please see that attached figure). The propagation loss is different for different boundary<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/03\/22-03-2023-1679484602-PML VS METAL BC.jpg\" alt=\"\"> condition. Also, what does negative loss means here?<\/p>\n","protected":false},"template":"","class_list":["post-275850","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=\"I am trying to calculate the propagation loss in the Si Nitride waveguide (Please see that attached figure). The propagation loss is different for different boundary condition. 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