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Dispersion characteristics of the broadside-coupled coplanar waveguide

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1 Author(s)
Cam Nguyen ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

The dispersive properties for the even- and odd-modes of the broadside-coupled coplanar waveguide (CPW) are determined using the spectral domain method. Various numerical results of the even- and odd-mode effective dielectric constants as a function of frequency are presented and discussed. It is found that the structure has a very weak dispersion. This fact is further confirmed through a comparison between the calculated dynamic and quasi-static results of the even- and odd-mode effective dielectric constants. The low dispersion feature signifies the fact that the quasi-static analysis is adequate for designing practical microwave and millimeter-wave circuits employing broadside-coupled CPW

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:41 ,  Issue: 9 )