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Coaxial feed point calculation in Circular Patch Antenna

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yyan71

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Hi there,

I am learning RF antenna design. I want to design a circular patch antenna with coaxial feeding method.

I have read a book Antenna Theory: Analysis and Design edited by Balanis. However, I could not find how to define the location of Coax feed point for circular patch. In chapter 14 Balanis only gives a sample for rectangular antenna.

Could anyone help in formulas about calculating the location of coax feed point in circular patch antenna? I am highly appreciated!

Yang
 

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