Returns the expansion coefficients in the unconjugated form between the fields recorded at two arbitrary DFT monitors or saved in two d-cards. The coefficients in the unconjugated form are defined according to:
$$ \begin{array}{l}{a=0.25^{*}\left(\frac{\int d \mathbf{S} \cdot \mathbf{E}_{1} \times \mathbf{H}_{2}}{N}+\frac{\int d \mathbf{S} \cdot \mathbf{E}_{2} \times \mathbf{H}_{1}}{N}\right)} \\ {b=0.25^{*}\left(\frac{\int d \mathbf{S} \cdot \mathbf{E}_{1} \times \mathbf{H}_{2}}{N}-\frac{\int d \mathbf{S} \cdot \mathbf{E}_{2} \times \mathbf{H}_{1}}{N}\right)} \\ {N=0.5 * \int d \mathbf{S}\cdot \mathbf{E}_{2} \times \mathbf{H}_{2}} \\ {P=0.5^{*} \int d \mathbf{S} \cdot \mathbf{E}_{1} \times \mathbf{H}_{1}}\end{array} $$
For more detail on how to use this command, definitions on the parameters and how to interpret the results, please see Using Mode Expansion Monitors .
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Syntax |
Description |
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expand2('monitor1','monitor_ref',x,y,z); |
outputs the expansion coefficients between the fields of two monitors (or d-cards) in the unconjugated form
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Example
The following script expands the fields from monitor "R" onto the reference monitor "R_ref" in the unconjugated form:
M = expand2('R','R_ref',0,0,0);
f = getdata('R','f');
a = pinch(M,1,1);
b = pinch(M,1,2);
n = pinch(M,1,3);
p = pinch(M,1,4);
S11 = b;
See Also
List of commands , Using Mode Expansion Monitors , setexpansion , removeexpansion , expand