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Port settings for cpw slot and loop antennas in CST

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abuantenna

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Hi,

How I can correctly define the port for the structures like in the photo?
I just defined the port as +-4*feeder width. CST gives that "some higher modes are not considered. This leads to an inaccurate energy balance. Consider to reduce the port size or decrease the upper frequency limit."

The port size seems to be ok. Also the upper frequency limit. The bandwidth is just between 50-55 GHz.

So, is there any problem with this warning ?[/img]
 

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