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Picosecond pulse propagation in coplanar waveguide forward directional couplers

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2 Author(s)
Singkornrat, P. ; Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA, USA ; Buck, J.A.

The spectral-domain method is used to calculate the frequency-dependent even- and odd-mode effective dielectric constants of symmetric coplanar waveguide forward directional couplers. Comparisons are made with symmetric microstrip forward couplers on the same substrate that have the same line spacing and access port characteristic impedance. Results are shown which indicate that certain coplanar designs will have lower loss and greater bandwidth than the microstrip devices. Picosecond pulse propagation in both structures is studied using the calculated dispersion data

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:39 ,  Issue: 6 )