Title :
Automatic root selection for the unknown thru algorithm
Author :
Stenarson, J. ; Yhland, K.
Author_Institution :
SP Swedish Nat. Testing & Res. Inst., Boras, Sweden
Abstract :
This paper presents a method for automatic root selection in the unknown thru algorithm. The described method can be used for any thru standard that has a simple phase expression. Examples for coaxial, waveguide and waveguide to coaxial adapters are discussed. The paper also includes equations for converting the resulting 7-term error model to the 12-term model commonly used in network analyzers. And also how to combine these steps into a simple algorithm that utilizes as much as possible of the VNA firmware for computations.
Keywords :
coaxial waveguides; microwave measurement; multiport networks; network analysers; spectral analysers; 12-term model; 7-term error model; VNA firmware; automatic root selection; coaxial waveguide; unknown thru algorithm; waveguide-to-coaxial adapter; Automatic testing; Calibration; Coaxial components; Equations; Error correction; Frequency measurement; Impedance; Microprogramming; Phase measurement; Propagation delay;
Conference_Titel :
ARFTG Conference, 2006 67th
Conference_Location :
San Francisco, CA
Print_ISBN :
978-0-7803-9529-9
DOI :
10.1109/ARFTG.2006.4734366
