Publications [#339121] of Lawrence Carin

Papers Published

1. Kralj, D; Mei, L; Hsu, TT; Carin, L, Short-Pulse Propagation in a Hollow Waveguide: Analysis, Optoelectronic Measurement, and Signal Processing, IEEE Transactions on Microwave Theory and Techniques, vol. 43 no. 9 (January, 1995), pp. 2144-2150, Institute of Electrical and Electronics Engineers (IEEE) [22.414552], [doi]
   (last updated on 2024/12/31)

   Abstract:
   An asymptotic analysis is performed for short-pulse propagation in a hollow waveguide. It is demonstrated that each time-domain mode supported by the guide is characterized by a time-dependent frequency which, as time proceeds, approaches the modal cutoff frequency. This phenomenon is demonstrated experimentally by performing short-pulse optoelectronic measurements for the case of rectangular waveguide. In these measurements a short-pulse laser is used to switch planar antennas photoconductively, generating freely propagating waveforms with instantaneous bandwidth from 15–75 GHz. Time-frequency signal processing is performed on the measured data, the results of which are in close agreement with the predictions of the asymptotic analysis. © 1995 IEEE

   Keywords:
   Rectangular waveguides;Time domain analysis;Laser pulses;Microwave antennas;Photoconductivity;Waveform analysis;Bandwidth;Signal processing;Switching;Electromagnetic dispersion;Electric network analysis;Electric waveforms;