Theoretical and experimental characterization of coplanar waveguide discontinuities for filter applications
Abstract
A full-wave analysis of shielded coplanar waveguide two-port discontinuities based on the solution of an appropriate surface integral equation in the space domain is presented. Frequency-dependent scattering parameters for open-end and short-end coplanar waveguide (CPW) stubs are computed using this method. The numerically derived results are compared with measurements performed in the frequency range 5-25 GHz and show very good agreement. From the scattering parameters, lumped-element equivalent circuits have been derived to model the discontinuities. The inductors and capacitors of these models have been represented by closed-form equations, as functions of the stub length, to compute the circuit element values for these discontinuities.
- Publication:
-
IEEE Transactions on Microwave Theory Techniques
- Pub Date:
- May 1991
- DOI:
- 10.1109/22.79116
- Bibcode:
- 1991ITMTT..39..873D
- Keywords:
-
- Discontinuity;
- Microwave Filters;
- Microwave Scattering;
- Waveguide Filters;
- Bandpass Filters;
- Equivalent Circuits;
- Green'S Functions;
- Integral Equations;
- Method Of Moments;
- Transmission Lines;
- Electronics and Electrical Engineering