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Shift resonant frequency CST

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ericjoe

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Greeting. I am using CST studio 2010. Currently I am designing a planar antenna for dual band GSM and single band WiFi.

I am modifying a triband antenna from an example, whose S parameter value are very prefect, just the frequency values are not accurate.

I wish to shift the frequency graph to my desired frequency domain which are 0.9, 1.8 and 2.45 GHz. Here I have attached my .cst file.

Currently, I am adjusting the parameters of each element ( using the para-sweep on width and height of each solid, except for the thickness ) So can anyone shed some light for me?
 

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