Coplanar waveguide and slot line on magnetic substrates: analysis and experiment

A full-wave analysis is presented for coplanar waveguide (CPW) and slotline phase shifters on magnetic substrates. The analysis is based on a multilayer Green's function which is formulated using a transmission matrix approach. This approach is modified so that its computational efficiency is increased by deriving the transmission matrices for dielectric and ferrite slabs in a closed form. The Green's function is then applied to the full-wave analysis of a slotline and CPW on infinite-width substrates. Several different multilayered configurations are investigated with respect to their nonreciprocal phase-shift properties. Perfectly conducting sidewalls are then added to the analysis and the resulting configuration is used to study the effect of various CPW parameters on differential phase shift. An experimental structure built on the surface of rectangular ferrite toroid is described and its differential phase analysis compared to measurements. Calculated and measured results are in good agreement. >

[1]  G. Bock.  Dispersion characteristics of slot lines on a ferrite substrate by a mode-matching technique , 1982 .

[2]  Tatsuo Itoh,et al.  Analysis of Double-Layered Finlines Containing a Magnetized Ferrite , 1987, 1987 IEEE MTT-S International Microwave Symposium Digest.

[3]  R. W. Jackson,et al.  Considerations in the Use of Coplanar Waveguide for Millimeter-Wave Integrated Circuits , 1986 .

[4]  C. Wen.  Coplanar Waveguide, a Surface Strip Transmission Line Suitable for Nonreciprocal Gyromagnetic Device Applications , 1969 .

[5]  Nirod K. Das,et al.  A Generalized Spectral-Domain Green's Function for Multilayer Dielectric Substrates with Application to Multilayer Transmission Lines , 1987 .

[6]  C. M. Krowne,et al.  Fourier Transformed Finding Propagation Matrix Method of Characteristics of Complex Anisotropic Layered Media . , 1984 .

[7]  J. Adam.  A slot-line MSW signal-to-noise enhancer , 1985 .

[8]  R. H. Jansen,et al.  Unified user-oriented computation of shielded, covered and open planar microwave and millimeter-wave transmission-line characteristics , 1979 .

[9]  S. Teitler,et al.  Refraction in Stratified, Anisotropic Media* , 1970 .

[10]  F. Lange.  Analysis of shielded strip- and slot-lines on a ferrite substrate transversely magnetized in the plane of the substrate , 1982 .

[11]  R. Mittra,et al.  An Analytical Investigation of Fin Lines with Magnetized Ferrite Substrate. , 1982 .

[12]  J. L. Allen,et al.  Slot Line Application to Miniature Ferrite Devices , 1969 .

[13]  C. M. Krowne,et al.  Fourier Transformed Matrix Method of Finding Propagation Characteristics of Complex Anisotropic Layered Media , 1984 .

[14]  R. Vahldieck,et al.  A Modified Mode-Matching Technique and its Application to a Class of Quasi-Planar Transmission Lines , 1985 .

[15]  R. Janaswamy,et al.  Dispersion Characteristics for Wide Slotlines on Low-Permittivity Substrates (Short Paper) , 1985 .

[16]  D. W. Berreman,et al.  Optics in Stratified and Anisotropic Media: 4×4-Matrix Formulation , 1972 .

[17]  J. B. Davies,et al.  Spectral Domain Solution of Arbitrary Coplanar Transmission Line with Multilayer Substrate (Short Papers) , 1977 .

[18]  R. Jackson,et al.  Full Wave Analysis of Slot Line and Coplanar Waveguide on a Magnetic Substrate , 1987, 1987 IEEE MTT-S International Microwave Symposium Digest.

[19]  B. R. Savage,et al.  Ferrimagnetic Parts for Microwave Integrated Circuits , 1971 .

[20]  R. Vahldieck,et al.  Accurate Hybrid-Mode Finline Configurations Including Analysis of Various Multilayered Dielectrics, Finite Metallization Thickness, and Substrate Holding Grooves , 1984 .

[21]  G. Bock.  New multilayered slot-line structures with high nonreciprocity , 1983 .

[22]  S. R. Seshadri,et al.  Surface magnetostatic modes of a ferrite slab , 1970 .