{"id":381835,"date":"2024-09-08T10:52:48","date_gmt":"2024-09-08T10:52:48","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/farfield-calculation-and-understanding\/"},"modified":"2024-09-08T10:52:48","modified_gmt":"2024-09-08T10:52:48","slug":"farfield-calculation-and-understanding","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/farfield-calculation-and-understanding\/","title":{"rendered":"FarField calculation and understanding"},"content":{"rendered":"<p>&lt;p&gt;Hello, I&#8217;m trying to use FarField in Lumerical, I have the beam shape of single emmiter and than I upload it to new FDTD simulation as source and I build 10 on 10 sources with it to simulate far field of phase array. after I calculate the nearfield with detector I use Farfield calculation to determine the farfield picture the array will give me. now the plot is polar one and when I take the data (or plot in new windows) its become only in ux and uy axis. But what I need is to determine the width of the beam in the real world and I&#8217;m not sure how to use ux,uy to transform it to real width of the beam I tried script that there is in the examples but when the beam was in direct (no phase change in the array) the resaults were infinite width in the phi axis.&lt;\/p&gt;&lt;p&gt;I would like to some help firstly to understand if my method is curect and how to extract real information from the data given to me&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;Tnx&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-381835","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello, I&#039;m trying to use FarField in Lumerical, I have the beam shape of single emmiter and than I upload it to new FDTD simulation as source and I build 10 on 10 sources with it to simulate far field of phase array. after I 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