Title :
Traceable reflection coefficient measurements in coaxial line at MF and HF
Author :
Ridler, N.M. ; Medley, J.C.
Author_Institution :
NPL, DRA, Malvern, UK
fDate :
7/15/1894 12:00:00 AM
Abstract :
This paper describes a measurement capability developed at NPL Malvern to provide traceability for complex voltage reflection coefficients at MF and HF (300 kHz to 30 MHz). A vector indicating automatic network analyser (ANA) is used as a reflectometer and is calibrated in terms of a calculable open-circuit, a short-circuit and a characterised load. The load is characterised using a frequency-invariant equivalent-circuit model derived from measurement data at higher frequencies. The equivalent-circuit details are given, along with results achieved using this capability.<>
Keywords :
coaxial cables; equivalent circuits; high-frequency transmission line measurement; network analysers; reflectometry; voltage measurement; 300 kHz to 30 MHz; HF; MF; NPL Malvern; characterised load; coaxial line; complex voltage reflection coefficients; frequency-invariant equivalent-circuit model; open-circuit; reflectometer; short-circuit; traceable reflection coefficient measurement; vector indicating automatic network analyser; Circuit analysis; Coaxial transmission lines; Equivalent circuits; Reflectometry; Transmission line measurements; Voltage measurement;
Conference_Titel :
What's New in Microwave Measurements (Digest No.1994/042), IEE Colloquium on
