Title :
Analysis of shielded CPW discontinuities with air-bridges
Author :
Dib, N.I. ; Katehi, P.B. ; Ponchak, G.E.
Author_Institution :
Radiat. Lab., Michigan Univ., Ann Arbor, MI, USA
Abstract :
The effect of air-bridges on the performance of various coplanar waveguide (CPW) discontinuities is studied. Specifically, the coupled open-end CPWs and the short-end shunt CPW stub discontinuities are considered. The high-frequency effect of the air-bridge is evaluated using a hybrid technique. First, the frequency-dependent equivalent circuit of the planar discontinuity without the air-bridge is derived using the space domain integral equation method. Then, the circuit is modified by incorporating the air-bridge´s parasitic inductance and capacitance, which are evaluated using a simple quasi-static model. The frequency response of each discontinuity with and without the air-bridge is studied, and the scattering parameters are plotted in the frequency range 30-50 GHz for typical CPW dimensions.<>
Keywords :
waveguide components; waveguide theory; air-bridges; coplanar waveguide; coupled open-end CPWs; frequency range; frequency response; frequency-dependent equivalent circuit; high-frequency effect; parasitic capacitance; parasitic inductance; planar discontinuity; quasi-static model; scattering parameters; shielded CPW discontinuities; short-end shunt CPW stub discontinuities; space domain integral equation method; Coplanar waveguides; Coupling circuits; Electromagnetic waveguides; Frequency dependence; Inductance; Integral equations; NASA; Slotline; Surface waves; Waveguide discontinuities;
Conference_Titel :
Microwave Symposium Digest, 1991., IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-87942-591-1
DOI :
10.1109/MWSYM.1991.147038
