Title :
Full-wave characterization of the mode conversion in a coplanar waveguide right-angled bend
Author :
Wu, Ming-Dong ; Deng, Sheng-Ming ; Wu, Ruey-Beei ; Hsu, Power
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
11/1/1995 12:00:00 AM
Abstract :
A full-wave algorithm is proposed to analyze thoroughly a 90° bend of coplanar waveguide (CPW). Based on the mixed potential integral equation (MPIE) formulation, the equivalent magnetic current distribution on the apertures is solved by the moment method using overlapping rooftop basis functions and the Galerkln weighting procedure. The matrix pencil approach is then utilized to do the de-embedding procedure and extract both the coplanar and slotline modes scattering off the asymmetric discontinuity. Experiments are performed to measure the scattering parameters and the results verify the accuracy of the present algorithm. The full 4×4 scattering matrix between these two modes is presented from which the occurrence of the mode conversion is investigated. The mode conversion is noticed to become almost complete at certain frequencies, which may be useful in the design of CPW to coupled slotline transition
Keywords :
Galerkin method; S-parameters; coplanar waveguides; current distribution; integral equations; method of moments; waveguide discontinuities; waveguide theory; CPW to coupled slotline transition; Galerkin weighting procedure; asymmetric discontinuity; coplanar waveguide; de-embedding procedure; equivalent magnetic current distribution; full-wave characterization; matrix pencil approach; mixed potential integral equation; mode conversion; moment method; overlapping rooftop basis functions; right-angled bend; scattering parameters; slotline modes; Algorithm design and analysis; Apertures; Coplanar waveguides; Current distribution; Integral equations; Magnetic analysis; Moment methods; Scattering; Slotline; Transmission line matrix methods;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
