Time-frequency distribution analysis of waveguide modes

Moghaddar, A.; Walton, E.K.

doi:10.1109/aps.1992.221449

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2004

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“…The STFT is used to window the wave propagation in the waveguide, identifying the contribution of each mode to the received signal at discrete intervals of time. Mode content analysis using the STFT was done for straight waveguides in [2]. Using timefrequency analysis, the modal information, and scattering behavior in straight waveguides were examined.…”

Section: Introductionmentioning

confidence: 99%

Experimental mode content analysis technique for complex overmoded waveguide systems

Cepni

Stancil

Brodtkorbt³

2004

IEEE Antennas and Propagation Society Symposium, 2004.

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In this paper, short time Fourier transform techniques are used to analyze the mode content of overmoded waveguides. The analysis is applied to transmission through straight sections, bends, and T-junctions. In addition to determining the modes with the dominant contributions to the response, the presence of mode conversion in bends and T-junctions is observed. The direct application of this technique is channel characterization of an HVAC duct system, which behaves as a multimode waveguide network at RF frequencies when used for indoor wireless communications.

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Section: Introductionmentioning

confidence: 99%