Computation of Step Discontinuitiesin Coaxial Line (Computer Program Descriptions)

Jurkus, Algirdas

doi:10.1109/tmtt.1972.1127852

Cited by 11 publications

(5 citation statements)

References 2 publications

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“…The equivalent circuit of the probe including the coaxial line section and its discontinuity effects has been presented by a parallel capacitance model [11][12][13]. The capacitances of the conventional and stepped SMA probes characterized by using FDTD method are shown in Figure 3.…”

Section: Probe Structure and Analysismentioning

confidence: 99%

A Broadband Complex Permittivity Probe Using Stepped Coaxial Line

Seewattanapon¹,

Akkaraekthalin

2011

JEMAA

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This paper proposes the stepped coaxial line sensor using the reflection coefficient in microwave range for complex permittivity measuring. The proposed probe is adapted from the conventional SMA connector which is cheap and easy to fabricate. The analysis model of the probe has been done by using FDTD method with the reference material such as the distilled water. The stepped SMA probe presents the accurate result compared with the convention one. The permittivity values of the concentrated alcohols of 10%, 15% and 20% as DUTs at 24<sup>o</sup>C in a frequency range of 0.1 GHz to 6 GHz have been measured using the proposed probe. Also, the measurement of salted butter permittivity has been performed. The measured results are more accurate compared with the commercial probe

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Section: Probe Structure and Analysismentioning

confidence: 99%

A Broadband Complex Permittivity Probe Using Stepped Coaxial Line

Seewattanapon¹,

Akkaraekthalin

2011

JEMAA

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“…From the next modal approximation, where the aperture field also consists of the TM 01 mode, all essential features of the input admittance dependence on the conductivity and frequency are present. This secondorder approach can be directly derived from equation (17) if the matrix G is truncated to the 2×2 matrix G (2) , yielding…”

Section: Equivalent Network Representation Of the Junctionmentioning

confidence: 99%

Coaxial to circular waveguide transition as high-precision easy-to-handle measuring cell for the broad band dielectric spectrometry of liquids

Göttmann

Kaatze

Petong

1996

Meas. Sci. Technol.

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For an abrupt transition from a coaxial to circular waveguide with a dielectric interface in the plane of discontinuity, the input admittance has been calculated as a function of frequency and of relevant geometrical and electrical quantities. The calculations have been performed applying a mode matching technique. A simple lumped-element representation has been derived from the theoretical considerations which was found to provide an excellent description of the input admittance of the discontinuity over a wide range of values of the parameters of interest. Network parameters are discussed for transitions that are most suited as sample cells for dielectric measurements in both the time domain and the frequency domain. Results from test measurements are reported to show the agreement of our numerical predictions with precise capacitance values of other authors and also to demonstrate the sensitivity and accuracy attainable with such cells.

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“…Calculation of coaxial line step capacitances is based upon the analysis of Whinnery, Jamieson, and Robbins, 1944 [8] and is aided by the work of Somlo, 1967 [9] and Jurkus , 1972 [10]. The step capacitances vary slowly with frequency up to the highest recommended frequencies for coaxial line and this frequency variation is presently neglected in computer programs CS11, CS21, ICS11, and ICS21.…”

Section: Computer Programsmentioning

confidence: 99%

“…More accurate values will be available later both from measurements and from the computer programs of Somlo [9] and Jurkus [10].…”

Section: Design Informationmentioning

confidence: 99%

Calculated and measured S₁₁, S₂₁, and group delay for simple types of coaxial and rectangular waveguide 2-port standards

Beatty¹

1974

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Formulas, simple computer programs, graphs and tables are given to aid in the design and construction of 2-port standards for rectangular waveguide and coaxial line. Only standards consisting of reduced height waveguide, increased ODIC (outside diameter of inner conductor), or reduced IDOC (inside diameter of outer conductor) coaxial line are considered. Examples of the calculation of S 1 , , S", and group delay, and their measurement with automatic network analyzers are given. Some of the important sources of error in the standards are discussed and design data are presented for specific standards .

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Computation of Step Discontinuitiesin Coaxial Line (Computer Program Descriptions)

Cited by 11 publications

References 2 publications

A Broadband Complex Permittivity Probe Using Stepped Coaxial Line

A Broadband Complex Permittivity Probe Using Stepped Coaxial Line

Coaxial to circular waveguide transition as high-precision easy-to-handle measuring cell for the broad band dielectric spectrometry of liquids

Calculated and measured S₁₁, S₂₁, and group delay for simple types of coaxial and rectangular waveguide 2-port standards

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