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Chamfer size of T junction in IE3D to design patch antenna?

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supersage

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Hi all,

Now I am using IE3D to design an patch array antenna at 60 GHz and need to design a T junction. The output arms have characteristic impedance of 50 ohm with the corresponding width of 0.21988 mm, and the input arm has a quarter-wavelength transformer whose characteristic impedance of 35.56 ohm with the corresponding width of 0.3952 mm, in order to transform the impedance to 50 ohm at the input terminal. I am wondering the chamfer size of such a T junction in IE3D!!! In addition, could you please tell me the typical chamfer size of a T junction? Thank you very much!

Sincerely yours,
 

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