cst error:Port "1" is inhomogeneously filled within the first 3 mesh cells.HELP!!!!

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sibinikesh

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cst errorort "1" is inhomogeneously filled within the first 3 mesh cells.HELP!!!!

Hi Im new to cst software.im designing coaxial fed bow tie antenna.i got this error"Port "1" is inhomogeneously filled within the first 3 mesh cells".cnt find out the problem.plzz help !!!very urgent..i have attached our cst file.."THNX IN ADVANCE"View attachment Project.zipView attachment Project.zip
 

Re: cst errorort "1" is inhomogeneously filled within the first 3 mesh cells.HELP!!

I am having the same problem.Members plz advise...My antenna is to be fed from the bottom layer ground, to the patch on the top layer. can someone also give step by step instructions on creating the coaxial port.
And secondly r there any formulas to calculate the precise probe feed point of 50 ohm excitation?
 
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Re: cst errorort "1" is inhomogeneously filled within the first 3 mesh cells.HELP!!

,,, see this ...**broken link removed**
 

Re: cst errorort "1" is inhomogeneously filled within the first 3 mesh cells.HELP!!

Use "Mesh View" to see the mesh density around your port, you need to increase locally or globally the mesh density. Otherwise you have to change your geometry.
1) Set new mesh density and perform meshing
2) activate mesh view
3) count in all direction your mesh numbers of your port, should at least be three.
 

Re: cst errorort "1" is inhomogeneously filled within the first 3 mesh cells.HELP!!

@fiwi: Thnx

@johnjoe: I tried exapanding the coax cable to -z and also increased the mesh size, but still same error.
 

Re: cst errorort "1" is inhomogeneously filled within the first 3 mesh cells.HELP!!

I got the solution. Its not related to mesh cell size. I just increased the coaxial dimensions. I made three cylinders, as shown in the video uploaded by @fiwi.

First cylinder inner is from Zmin=-3 to Zmax=height structure till patch(1.67). Insert the cylinder into patch.
Second cylinder from Zmin=-3 to Zmax=height of substrate (1.6). Add to substrate, if asked.
Thrid cylinder from Zmin=-3 to Zmax=height of ground (0.035). Add ground and third cylinder.

First and third cylinder were PEC while second cylinder was Teflon.

Thats it

- - - Updated - - -

@sibinikesh: I removed the error from ur file..Here u go..Just run it.
Do like...Cheers
 

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  • Project.zip
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Re: cst errorort "1" is inhomogeneously filled within the first 3 mesh cells.HELP!!

It is related to mesh density because if you would further increase your density, cst can use more than 2 cells in your coax adapter and it would work. But I agree, if you have a strange coax feed, maybe you need a too high density -> simulation time and so on. In this case is your approach ok.
 

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