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Progress In Electromagnetics Research
ISSN: 1070-4698, E-ISSN: 1559-8985
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ANALYSIS ON THE CALCULATION OF THE INVERSE DISCRETE FOURIER TRANSFORM (IDFT) OF PASSBAND FREQUENCY RESPONSE MEASUREMENTS IN TERMS OF LOWPASS EQUIVALENT RESPONSE

By A. Gifuni and S. Perna

Full Article PDF (262 KB)

Abstract:
An analysis on the calculation of the inverse discrete Fourier transform (IDFT) of passband frequency response measurements in terms of lowpass equivalent responses is shown, in order to specify the differences in the results given from different common algorithms; differences with respect to the calculation of the IDFT for true lowpass responses are remarked. It is shown how the basic sequence has to be represented in time domain by invoking the causality, which is supported by results. Results are corroborated by an application on measured data in a reverberation chamber. The present analysis helps readers understand different IDFT algorithms used by Manufacturers and make their own codes whenever desirable.

Citation:
A. Gifuni and S. Perna, "Analysis on the Calculation of the Inverse Discrete Fourier Transform (IDFT) of Passband Frequency Response Measurements in Terms of Lowpass Equivalent Response," Progress In Electromagnetics Research, Vol. 160, 63-69, 2017.
doi:10.2528/PIER17081703
http://www.jpier.org/PIER/pier.php?paper=17081703

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