Ultra-wideband transient microwave scattering measurements using optoelectronically switched antennas

Wideband dispersion measurements of water in reflection and transmission

“…Also of interest with regard to deconvolution, the coplanar-strip antennas used have been found to produce radiation which is almost of pure linear polarization (with the electric field polarized parallel to the slot in the coplanarstrip horn [l]). The cross section of the pulsed beam was measured to have a diameter of approximately 3 cm [ 5 ] , and all materials used in the measurements had cross sectional areas large compared to the beam cross section (to avoid edge effects).…”

“…Depending on the laser and antenna used, one can generate freely propagating radiation of picosecond to subpicosecond duration, with commensurate bandwidth extending from microwave to terahertz frequencies, respectively. This radiation has been used to characterize the dispersive properties of various materials [1]- [4] as well as to perform scattering measurements on several canonical targets [5].…”