Title :
A New Self-Calibration Method of an
Meter for RF Resistance Calibration Using Capacitance Standards
Author_Institution :
Meas. Stand. Center, Agilent Technol. Int. Japan, Ltd., Tokyo
fDate :
4/1/2009 12:00:00 AM
Abstract :
This paper describes how to calibrate a four-terminal-pair (4TP) LCR meter at the right (90deg) angle. The LCR meter uses the right angle signal to process a synchronous detector as a vector signal receiver. The right-angle calibration method uses, at a minimum, one variable-phase signal generator (SG) and a phase shift circuit. The SG does not require a precision right angle, but it does need good phase stability. The described phase shifter provides the required differential phase of nearly the right angle. As a result, the right-angle phase deviation of the LCR meter is better than 65 murad (0.223´) with 37-murad (0.127´) uncertainty at 10 MHz. This method is also applicable to the phase calibration of a vector network analyzer.
Keywords :
calibration; detector circuits; electric impedance measurement; meters; phase shifters; signal generators; RF resistance calibration; capacitance standards; four-terminal-pair LCR meter; frequency 10 MHz; phase calibration; phase shift circuit; phase stability; right-angle calibration method; right-angle phase deviation; self-calibration method; synchronous detector; variable-phase signal generator; vector network analyzer; vector signal receiver; Capacitance measurement; measurement errors; phase measurement; phase shifters; resistance measurement; signal detection;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2008.2008080