Title :
Extended cross-ratio reflection correction at microwave frequencies using waveguide air-lines
Author_Institution :
Phys. Tech. Bundesanstalt, Braunschweig, Germany
fDate :
4/1/2001 12:00:00 AM
Abstract :
It is shown that the extended cross-ratio method of correction of the complex reflection coefficient Γ is applicable not only in coaxial lines but also in waveguides at microwave frequencies when precision waveguide sections of well-defined cross dimensions are used as reference air-line impedance standards. A detailed uncertainty calculation which includes the influence of waveguide imperfections is given. Small total expanded uncertainties less than 0.002 for |Γ|⩽0.25 can be achieved
Keywords :
coaxial cables; electric impedance measurement; measurement uncertainty; microwave reflectometry; network analysers; rectangular waveguides; transfer standards; waveguide discontinuities; VNA; coaxial lines; complex reflection coefficient; extended cross-ratio reflection correction; microwave frequencies; precision waveguide sections; rectangular waveguides; reference air-line impedance standards; uncertainty calculation; waveguide air-lines; waveguide imperfections; Circuit testing; Coaxial components; Electrochemical machining; Impedance measurement; Measurement standards; Microwave frequencies; Microwave measurements; Millimeter wave measurements; Optical reflection; Planar waveguides;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
