Returns an interpolated s-parameter cell from a file containing a lookup table of design and extracted parameters.
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Syntax |
Description |
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out = lookupreadnportsparameter ("filename","table",design,"extracted"); |
Returns an interpolated s-parameter cell from a file containing a lookup table of design and extracted parameters. Parameter table is the name of the lookup table located inside the file, design is a cell containing multiple structures that define the design parameters to search, and extracted is the name of the parameter to be extracted. S-parameter file format must be compatible with the ‘Optical N Port S-Parameter’. Notes: The s-parameter files in the lookup-table should be in exact the same format. The s-parameter files shouldn't contain any header. |
Example
Loads the s-parameters of a coupler depending on user defined design parameters:
filename = "coupler.ixml";
table = "coupler";
radius = 3e-06;
gap = 3e-07;
design = cell(2);
#design (input parameters)
design{1} = struct;
design{1}.name = "radius";
design{1}.value = radius;
design{2} = struct;
design{2}.name = "gap";
design{2}.value = gap;
?M = lookupreadnportsparameter( filename, table, design, "out_filename" );
# set s-parameter to a S Parameter element
addelement("Optical N Port S-Parameter");
setvalue('SPAR_1','s parameters',M);
where “coupler.ixml” is a lookup table containing a map between coupler parameters and different s-parameters:
<?xml version="1.0" encoding="UTF-8"?>
<lumerical_lookup_table version="1.0" name = "coupler">
<association>
<design>
<value name="radius" type="double">3e-06</value>
<value name="gap" type="double">3e-07</value>
</design>
<extracted>
<value name="out_filename" type="string">radius_3_gap_3.txt</value>
</extracted>
</association>
</lumerical_lookup_table>
For example “radius_3_gap_3.txt” file contains s-parameters for the ‘Optical N Port S-Parameter’ element
("port 1","TE",1,"port 1",1,"transmission")
(3,3)
2.262580000000e+014 1.034036580296e-002 -2.629253819969e+000
2.275690000000e+014 9.716591457652e-003 -2.734774978072e+000
2.288790000000e+014 6.884340821788e-003 -2.838683842048e+000
("port 1","TE",1,"port 2",1,"transmission")
(3,3)
2.262580000000e+014 9.847090174703e-001 1.376105202083e-001
2.275690000000e+014 9.959778891317e-001 1.450376288706e-001
2.288790000000e+014 1.002869828593e+000 1.483183421805e-001
See Also
List of commands , lookupopen , lookupread , lookupwrite , lookupclose , lookupreadtable , lookupreadvalue , lookupappend , insert