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Different result CST and OpenEMS

Posted: Tue 29 Sep 2020, 09:42
by Blinky
Hi

As I am new in the usage of openEMS I wanted to test an antenna I already designed in CST Studio Suite.

This antenna is made out of 2 metal sheets placed on top of eachother with a thickness of 0.254mm. The antenna is shown in the image.

Image

The antenna is designed to resonate at 2.45GHz with a bandwidth of 200MHz. However if I design the same antenna with the same dimensions in OpenEMS i become a resonance that is shifted to 2.3GHz and a bandwidth of 150MHz

For this test in OpenEMS I am using the script from the simple patch tutorial (https://openems.de/index.php/Tutorial:_ ... tenna.html) but with different dimensions for the patch.

Does someone know an explanation and maybe a solution?

Kind regards

Re: Different result CST and OpenEMS

Posted: Fri 02 Oct 2020, 01:55
by Hale_812
mesh, airbox dimensions, excitation setup, boundaries... check your script in that order.