A Light-Modulated Scattering Technique for Diffraction Field Measurements
نویسنده
چکیده
. Tl:is paper des?ribes a scat tering method for meas uring microwave diff ractio n fi elds uSlllg light modulatIO n. A small photoelectric cell is suspended in t he fi eld as a scatterer upon whi ch light p ulses shine at an audi o rate. Only t he siO"nal scattered back by t he scat~ terer is modulated. A co herent detecto r is used which has ban outp ut voltage proportional to t he square of t he tangential component of t he fi eld under meas urement. Since t his method dispenses "'ith a ll electrical co.nnections to t he scatterer, circui t complications and sources of error due to connectIOn dis turbance and scatterer movement arc eliminated. Hitherto unavailable extensive data for t he ncar-zone d iffraction fi elds of finite cones are presented.
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