Mode analysis of gyrotron radiation by far field measurements

Abstract

The possibility and convenience of identifying the mode composition at the output of high power gyrotrons and analyzing the mode conversion properties of overmoded waveguide components (tapers, bends, mode converters) by measuring the radiation pattern from an open-ended circular waveguide in the far field region are studied. The method has been simplified remarkably by using spatial correlations of the field amplitudes at selected angles.