Discussion Forum

Hi, I have some questions when using wave optics module, 1. I use "Electromagnetic Waves, Frequency Domain" to simulate the Ez field property of 1550nm wavelength of a waveguide and the result is correct, the scattering boundary condition is chosen as source. Now I want to use "Electromagnetic Waves, Transient" to see the time responding of Ez field distribution, but I don't know how to define a plane wave excited by scattering boundary condition with a wavelength of 1550nm in "Electromagnetic Waves, Transient" module. What should define the value in Ez of scattering boundary condition? 2. I use port boundary condition as a source whose type is period to simulate the transmission efficiency of a waveguide, when I put the port into the innerior of the waveguide, the S-parameter is incorrect, when the slit type of port is chosen as "domain-backed" , it gives me S21 which is larger than 1, when the port type is chosen as "PEC-backed", the S21 is 0 at any wavelength. What should I choose? PEC-backed or Domain-backed? How can I get right S21? 3. How to define a circular-polarization light-source using port boundary condition? If the Ex,y,z vaules are defined as 1,i,0, is it a circular-polarization light?