Additional losses and time delay fluctuations of TE11 modes in curved circular waveguides-application to feeder antennas

The additional losses and fluctuations in time delay in TE11 operating curved circular waveguides have been determined. The results obtained reveal that additional losses are less than 0.1 dB and time delay fluctuations are less than 0.5 ns at a bend exit (curvature radius one metre). This permits the use of nonrigid circular waveguides as feeders to antennas in communication systems operating at frequencies above 10 GHz.