Wide-Band Network Characterization by Fourier Transformation of Time-Domain Measurements

Abstract

A novel method is presented of measuring driving-point and transfer impedance over a wide spectrum rapidly and with good accuracy. The technique uses a digital computer to transform the pulse response of a network into the frequency domain. A sampling oscilloscope provides the time transformation needed for data acquisition. The method and laboratory technique are discussed. Experimental data are presented that show agreement within 12 percent between the data from a single pulse measurement and bridge measurements over a band of 40 harmonic frequencies, i.e., 25-1000 MHz. Fundamental accuracy and bandwidth are believed to be substantially greater than these figures. Copyright © 1969 by The Institute of Electrical and Electronics Engineers, Inc.