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
Original language | English (US) |
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Pages (from-to) | 2144-2150 |
Number of pages | 7 |
Journal | IEEE Transactions on Microwave Theory and Techniques |
Volume | 43 |
Issue number | 9 |
DOIs | |
State | Published - Jan 1 1995 |
Externally published | Yes |
Bibliographical note
Generated from Scopus record by KAUST IRTS on 2021-02-09Keywords
- SCATTERING
- RADIATION
- ANTENNAS
- CAVITIES