WAVE-GUIDE EXPERIMENT RELATED TO FIELD CHAOS

An experiment is described in which a waveguide configuration is emplo yed to test for field chaos. The analysis is based on the identical st ructures of the equation for the component of electric field of TM mod es parallel to the guide axis in a metal waveguide and the Schrodinger equation for a particle confined to an equivalent 2-d quantum billiar d. It is observed that over a common frequency interval, transmission through a square guide with one side replaced by a concave section, is significantly less than transmission through guides with square or re ctangular cross sections with dimensions comparable to the concave-wal led guide. This attenuation is attributed to chaotic fields in the con cave-walled guide.