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Hi all,
There are two different dielctric constant for Rogers PCB material in their datasheet; "Dielectric Constant" and "Design Dielectric Constant". For example, Ro3006 has dielectric constant of 6.15 and design dielectric constant of 6.5.
I check a line calculator (MWI-2013 from Rogers...
Hi,
I use Altium designer to generate a dxf file for the drilling holes. The problem is the cirles appear different from a dxf viewer to another. Some shows them as circle, some as hexagonal, and yet some just as a single line segment. My technician uses Autosketch to run the laser drilling...
The problem is not that in the original HFSS design all of the vias are segmented polylines so in any kind of drill file they would appear as a circular polyline. If you give this to a milling or laser machine it will not treat them as a hole, instead it will try to cut the edges as by following...
Hi,
To fabricate holes in PCB the fabrication facility needs to have full circles at the position of vias NOT polylines (because the drilling machine will try to cut the polyline and will not use a drill to just make a hole). But I have my file converted to dxf from HFSS where all of the...
I agree with friendchip, but it should be noticed that Floquet port is matched in all frequencies, however, the feed is not. I think first you should make sure that the Floquet port (with specific settings) and the feed launch the same field pattern (i.e. same TE/TM modes) so these two will...
Excuse me for my late answer,
The relative phase shift between the master and slave boundaries determines the incident angle (this relative phase shift in HFSS 12 can be change directly from the Floquet wizard, but in HFSS 11 you need to change them in the wizards of master/slave boundaries)...
here is a excerpt from the help of HFSS v11
"Object Overlap Settings for Complicated Models HFSS>Set Material Override
Complicated geometries often have small object overlaps. This setting will allow overlaps between dielectrics and metals. In the overlap region, the metal will locally take...
Re: floquet port
In the Floquet port wizard, check the "use scane angles to calculate ..." you can set incident angle, phi and theta, respect to the global coordination system
As far as I know Floquet port is the best tool for analyzing such structures. If U need to reduce the computational complexity, relax the convergence criteria on the S-param, run the simulation, use smaller convergence criteria, and run the simulation again. Furthermore, U can use smaller air...
I think the phase difference between input and each output should be 90 degrees because there is just a quarter wave transmission line between them
In multistage Wilkinson you should consider 90 degree phase delay for each Wilkinson
yes, it's easy
go to the "assign material" menu
click on "add material" button
when the wizard appears click the dispersive property (i.e. permittivity, permeability, etc)
click on the "set frequency dependency" button
Four type of dispersive material could be defined
Note that the...
The phase different between master boundary and slave boundary determines the incident angle. For example phase difference 0 (both in x directed and y directed x master/slave pairs) means normal incidence.
This was a real problem for my when I was working on my thesis, but finally I found the answer. How much distance for Floquet port in HFSS?
Well, the answer to this question is rather complicated. Yet the distance could be obtained easily for each structure, frequency, and incident angle.
As...
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