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This statement is not accurate. What is availabe in "closed form" is the spectral domain Green's function--this isn't the "coupling functions" or mutual impedances. The muti-dimensional integration in the open boundary codes is mapped into summation of infinite series in the shielded codes. So...
The problem is most likely impedance matching. For AWR Axiem the port impedance is always 50ohm. You need to change the source impedance through a circuit simulation.
For EMSight the circuit is enclosed in a PEC boxed in the horizontal direction.
For Axiem the substate in the stackup extends to infinity along the horizontal direction.
Re: CST vs XFDTD
Note that CST has both time domain solver and frequency domain solver. so it is true that "cst depend on integral equation", but it is true to say that CST depends ONLY on integral equation.
AXIEM actually uses both triangle and rectangle in meshing. It seems that it tries to use rectangle as much as possible, which is good for accuary and efficiency.
Please note that I am a normal user, having no knowledge on the internal of IE3D.
Based on what I read and learned:
You need to have "AEC Layer" >=1 to enable using Automatic Edge Cell. Unless the structure consistly mainly of wire (i.e. tranverse dimension less than wavelength/20, e.g.), AEC...
The above post by "maxjames" is so wrong. The fact is that we have seen many new features implemented in HFSS, CST MWStudio and other 3D solvers over the past few years. There are many new commercial products since cheng or yugy offered their opinions. It is becoming more and more difficult to...
If you draw a dummy plane in HFSS, then you should be able to view a contour plot of the field on that surface using HFSS GUI. To create a surface plot as requested by you, (I think) it requires exporting the mesh and field, which is not that easy.
"This is impossible, of course, since you can not get more power out of the receiving antenna than you put into the transmitting antenna."
Root-Beer: you should read carefully on the definition of "antenna gain"--the "gain" is relative to isotropic antenna, not absolute power gain.
In one post above, the method is claimed to be "exact", regardless of the various impedance values. The truth is that the method is only approximate--it is important to recognize the underlying assumptions.
flyhigh,
I am not sure how to interpret your statement that the "phase information of bouncing waves are gone". Do you mean that the phase of S21 would not be affected by the phase of the bouncing (multiply reflected) wave(s)?
I agree equation 5.31 could give a good approximate effective...
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