The problem of radiation from the open end of a waveguide could be discussed in principle from several points of view. Rigorously, the radiation can be considered to arise from the current distribution on the inside walls of the guide, which is just the current distribution associated with the fields propagated in the interior of the guide, together with the currents flowing from the open end out upon the exterior guide surface. Were it not for difficulties in the analysis, this current distribution and the radiation field at an external point could be calculated. This has, however, not yet been accomplished.

Inspec keywords: antenna feeds; antenna radiation patterns; horn antennas; circular waveguides

Other keywords: circular waveguide; horn antenna feeds; current distribution; radiation field; radiation problem

Subjects: Single antennas