Design and development of high frequency standard inductors

Abstract

A set of high frequency standard inductors (10 mH, 100 mH and 1000 mH) has been designed and developed. Such inductors, which are in the form of RC circuit having thin film resistors and high quality capacitor, show little variation at high frequencies. Also their terminals are provided with 4-TP (Four Terminal Pair) configuration, which is capable of minimizing residual impedances and stray field effects at high frequencies. These inductors serve as good inductance standards, which ensure high accuracy at high frequencies upto about 10 MHz. Such inductors would serve as echelon I level transfer standards at HF and are also quite suitable for calibration of 4-TP LCR meters/ impedance bridges.