Estimation of group delay ripple of physical networks using a fast, band-limited Hilbert transform algorithm and scalar transfer function measurements

Philip Perry, Thomas J. Brazil

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

A set of PC based programs has been developed for use with a standard scalar network analyser (SNA) to measure and display relative group delay. The core of the data processing algorithm is a form of the Hilbert transform which uses the Fast Fourier Transform (FFT) for computational speed and ease of implementation. This is used to derive the equivalent minimum phase response for the circuit, and calculate the group delay associated with this new phase response. Results derived in this way are given for two examples and are found to compare favourably with measurements made with a vector network analyser (VNA). In each case it is found that the difference between the minimum phase response and the actual response can be approximated by a constant delay. The technique described here enables group delay variation to be accurately estimated in an rapid and economical manner from scalar data.

Original languageEnglish
Title of host publication1995 25th European Microwave Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1259-1264
Number of pages6
Volume2
ISBN (Electronic)9780000000002
DOIs
Publication statusPublished - 1 Jan 1995
Event25th European Microwave Conference, EuMC 1995 - Bologna, Italy
Duration: 4 Sep 1995 → …

Conference

Conference25th European Microwave Conference, EuMC 1995
CountryItaly
CityBologna
Period4/09/95 → …

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    Perry, P., & Brazil, T. J. (1995). Estimation of group delay ripple of physical networks using a fast, band-limited Hilbert transform algorithm and scalar transfer function measurements. In 1995 25th European Microwave Conference (Vol. 2, pp. 1259-1264). [4137381] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/EUMA.1995.337167