Dispersive Modes in the Time Domain: Analysis and Time-Frequency Representation

L. Carin, L. B. Felsen, D. Kralj, S. U. Pillai, W. C. Lee

Research output: Contribution to journalArticlepeer-review


Four algorithms for time-frequency (TF) distributions are considered for the processing and interpretation of dispersive time-domain (TD) data: The short-time Fourier transform, frequency and time-domain wavelets, and a new ARMA-based representation. The TF resolutions of the various distributions are discussed and compared with reference to results for the scattered fields from a chirped finite grating excited by a pulsed plane wave. The processing in the TF phase space extracts TD phenomenology, in particular the instantaneous dispersion relation—with its associated time-dependent frequencies—descriptive of the local TD Floquet modes on the chirped truncated grating.

Original languageEnglish (US)
Pages (from-to)23-25
Number of pages3
JournalIEEE Microwave and Guided Wave Letters
Issue number1
StatePublished - Jan 1994

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy


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