anisotropic materials in hfss
时间：03-31
整理：3721RD
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Hi all,
I am trying to simulate coupled microstrip lines placed on grounded magnetic materials. Since the lines are very close to each other, I want to use lumped ports instead of wave ports. I place the lumped ports at the sides of the magnetic biased magnetic substrate, such that they touch the microstrip lines on top. Then, when I try to simulate, HFSS gives this error:
Port refinement, process abc3d : Anisotropic material principal axis on "LP1" must align with the port normal.
Do you have any idea how to use lumped ports with anisotropic or magnetic materials? I think it is troublesome in HFSS. What I am doing for now is using an extra isotropic material before and after my anisotropic substrate, also simulating these extra segments separately, then converting S-parameters to T(transfer)-parameters, and then using the cascaded T-matrices to extract the T-matrix in the middle, then converting back to S-parameters. Lots of post processing, as you see...
All comments are very welcome. Thanks.
ps: Maybe I can insist on using wave ports; but the microstrip lines are very close to each other and I don't want the radiation boundaries to be very close, touching the substrate, since I cannot put the wave ports inside the air box. Maybe I can, if I cap those wave ports by putting some PEC at their backs, but this is gonna create a discontinuous behavior, since I will later also assume that unit cell is periodic I really don't want that...
I am trying to simulate coupled microstrip lines placed on grounded magnetic materials. Since the lines are very close to each other, I want to use lumped ports instead of wave ports. I place the lumped ports at the sides of the magnetic biased magnetic substrate, such that they touch the microstrip lines on top. Then, when I try to simulate, HFSS gives this error:
Port refinement, process abc3d : Anisotropic material principal axis on "LP1" must align with the port normal.
Do you have any idea how to use lumped ports with anisotropic or magnetic materials? I think it is troublesome in HFSS. What I am doing for now is using an extra isotropic material before and after my anisotropic substrate, also simulating these extra segments separately, then converting S-parameters to T(transfer)-parameters, and then using the cascaded T-matrices to extract the T-matrix in the middle, then converting back to S-parameters. Lots of post processing, as you see...
All comments are very welcome. Thanks.
ps: Maybe I can insist on using wave ports; but the microstrip lines are very close to each other and I don't want the radiation boundaries to be very close, touching the substrate, since I cannot put the wave ports inside the air box. Maybe I can, if I cap those wave ports by putting some PEC at their backs, but this is gonna create a discontinuous behavior, since I will later also assume that unit cell is periodic I really don't want that...