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RomanWorkshop

Warnings in CST Studio

When simulating my antenna in CST Studio 2019 I get these messages:

1. "Defined reference frequency for open boundary condition (2.442 GHz) is larger than the lowest relevant system frequency (monitor at 2 GHz).
Please check open boundary settings to ensure accurate monitor results for the lowest frequency of interest."

2. "1037 mesh edges are represented in staircase mode and have been filled with PEC.
3533 mesh edges are partially filled with PEC."

What should I do?

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,,where did you get these messages ... ??

,,,for 2,442GHz -broadband field monitors=>fmin=1,942GHz; fmax=2,942GHz

,,,show image or put the cst*file here ... !!! 

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3 hours ago, RomanWorkshop said:

1. "Defined reference frequency for open boundary condition (2.442 GHz) is larger than the lowest relevant system frequency (monitor at 2 GHz).

it means that the FRECUENCY range choosed is too small , set it from 2  to 3 ghz

the PEC thing doesn't matter much...is the MESH or check for INTERSECTIONS (interferences between solids)

Edited by clanon

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,,,the antenna I think works well, but I think the design is not very good...

screenshot_2484.jpg

 

screenshot_2483.jpg

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1 hour ago, clanon said:

it means that the FRECUENCY range choosed is too small , set it from 2  to 3 ghz

I already had this frequency set from 2 to 3 GHz, I also tried change it from 0-5 GHz, but warning message is still displayed.

Well, it's my first design. How to automatic position of port between these cylindrical elements?

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30 minutes ago, RomanWorkshop said:

How to automatic position of port between these cylindrical elements?

W  key and double click (align WCS) at the right point and angle. then make that distance the port length (a little more does not harm) SELECT port on the left panel and TRANSLATE (rotate) etc

Edited by clanon
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I added reflector (170x244mm, Steel-1008, 1mm thickness) with space between it and vibrators h=8mm. Now it is quite good antenna for 2.3 GHz ;) I must change dimensions of elements and maybe it will work for Wifi 2.4 GHz.

The impedance chart is interesting; by changing "h" space between reflector and vibrators, impedance was drop to 53 Ohms. So does antenna not require any impedance matching now and can be connected directly with a coaxial cable?

BowTie_F.pngBowTie_S.pngBowTie_V.pngBowTie_Z.png

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it's a BALANCED antenna (symmetrical HALFs) it NEEDs a balun 1:1 if you're close to 50 ohms

and 4:1 if you get close to 200ohms

Edited by clanon
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