I’m trying to calculate a phase shift by metasurface through a s-parameter analysis.
test_paper.fsp (67.6 KB)
I compared the phase shift between the result of the s-parameter analysis and of the monitor of transmission in the subset of s-parameter anaysis. A problem is that the results show different shape at a wavelength of 1.8 um. The phase shift by s-parameter analysis shows around pi. In contrast, the phase shift by the transmission monitor shows around -2*pi at 1.8um wavelength.
I thought we can obtain a phase shift through transmission monitor directly by compensating a phase shift by background material (i.e. air, substate, and etc.).
Can you explain why we cannot obtain the phase shift by transmission monitor directly?