Papers Published

1. Kralj, D; Carin, L, Ultra-wideband characterization of lossy materials: short-pulse microwave measurements, IEEE MTT-S International Microwave Symposium Digest, vol. 3 (January, 1993), pp. 1239-1242, IEEE [MWSYM.1993.277097], [doi] .
   (last updated on 2024/12/31)

   Abstract:
   Planar antennas are switched photoconductively to generate picosecond bursts of freely-propagating radiation with usable spectral amplitudes in the 5 to 85 GHz frequency range. This radiation is used to measure the frequency-dependent, complex index of refraction of dispersive materials in reflection and transmission; new deconvolution techniques are also demonstrated for extracting frequency-domain information from time-domain measurements. Experimental results are presented for the particular case of water, and a discussion is included on the relative merits of reflection and transmission time-domain measurements on materials.

   Keywords:
   Antenna radiation;Time domain analysis;Frequency domain analysis;Electromagnetic wave transmission;Neodymium lasers;Permittivity;Dispersion (waves);Electromagnetic wave reflection;Electromagnetic wave refraction;