Determination of the symmetric coupled line parameters in an inhomogeneous medium using reflected and transmitted waveforms

Author

Sakagami, Iwata ; Chino, Satoshi

Author_Institution

Dept. of Electr. & Electron. Eng., Muroran Inst. of Technol., Japan

fYear

1993

fDate

9-13 Aug 1993

Firstpage

369

Lastpage

374

Abstract

A measurement method for determining the symmetric coupled line parameters (the even and odd mode characteristic impedances and their phase velocities) in an inhomogeneous medium is described theoretically. The first and second terms of the power expansions of the reflection and transmission coefficients at the near end of the coupled lines are utilized for that purpose. The input function is a ramp waveform whose risetime is 0.2 ns. It is shown that very-short-duration pulses of positive or negative polarity can be created by the unequal phase velocities of the even and odd modes

Keywords

electromagnetic wave reflection; electromagnetic wave transmission; transmission line theory; even mode characteristic impedance; inhomogeneous medium; input function; near end; odd mode characteristic impedances; phase velocities; power expansions; ramp waveform; reflected waveforms; reflection coefficient; symmetric coupled line parameters; transmission coefficients; transmitted waveforms; very-short-duration pulses; Couplings; Equations; Equivalent circuits; Impedance measurement; Phase measurement; Power transmission lines; Reflection; Transfer functions; Transmission line theory; Velocity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 1993. Symposium Record., 1993 IEEE International Symposium on

Conference_Location

Dallas, TX

Print_ISBN

0-7803-1304-6

Type

conf

DOI

10.1109/ISEMC.1993.473709

Filename

473709