A generalized model for coupled lines and its applications to two-layer planar circuits

A generalized network model for asymmetrical and inhomogeneous coupled lines has been derived based on normal mode parameters. This model is useful for synthesis of single and multilayer coupled-line circuits, such as planar baluns and directional couplers. The synthesis procedures are described and have been verified by comparing with analysis results. >

[1]  A. M. Pavio,et al.  A monolithic or hybrid broadband compensated balun , 1990, IEEE International Digest on Microwave Symposium.

[2]  N. Marchand,et al.  Transmission-line Conversion Transformers , 1944 .

[3]  George I. Haddad,et al.  Characteristics of Coupled Microstrip Transmission Lines-I: Coupled-Mode Formulation of Inhomogeneous Lines , 1970 .

[4]  J. Malherbe,et al.  Microwave transmission line filters , 1979 .

[5]  Sheng Cheng,et al.  TEM equivalent circuits for quasi-TEM couplers , 1990, IEEE International Digest on Microwave Symposium.

[6]  V. K. Tripathi,et al.  Equivalent Circuits and Characteristics of Inhomogeneous Nonsymmetrical Coupled-Iine Two-Port Circuits (Short Papers) , 1977 .

[7]  V. Tripathi.  Asymmetric Coupled Transmission Lines in an Inhomogeneous Medium , 1975 .

[8]  G. I. Zysman,et al.  Coupled Transmission Line Networks in an Inhomoge neous Dielectric Medium , 2017 .

[9]  R. A. Speciale.  Fundamental Even- and Odd-Mode Waves for Nonsymmetrical Coupled Lines in Non-Homogeneous Media , 1974 .

[10]  B. M. Oliver.  Directional Electromagnetic Couplers , 1954, Proceedings of the IRE.

[11]  E. G. Cristal,et al.  Coupled-Transmission-Line Directional Couplers with Coupled Lines of Unequal Characteristic Impedances , 1966 .

[12]  Youn Kang Chin.  Analysis and applications of multiple coupled line structures in an inhomogeneous medium , 1982 .

[13]  M. C. Horton,et al.  General Theory and Design of Optimum Quarter-Wave TEM Filters , 1965 .