Planar antennas are switched photoconductively using optical pulses generated by a picosecond laser system. The freely propagating radiation, of picosecond duration and with bandwidth extending from 5 to 75 GHz, is used to perform short‐pulse scattering measurements on three‐dimensional targets. Results are shown for scattering from dielectric spheres, with the time‐domain results clearly showing the early and late‐time scattered signal. All measurements are compared with theory, directly in the time domain.

Topics
Dielectric properties, Optical metrology, Lasers
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© 1993 American Institute of Physics.
1993
American Institute of Physics
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