| 摘要 |
PURPOSE:To prevent the influence of an auxiliary waveguide upon a main waveguide by connecting waveguides, each of which is divided into two in the long side direction and has a radio wave absorbing body inserted internally, to end parts of the auxiliary waveguide. CONSTITUTION:Dimensions of parts, which are connected to long sides of an auxiliary waveguide 2, of terminating waveguides 10a and 10b are so selected that a frequency f1 is cut off and a frequency f2 passes through. Radio waves having the frequency f1 which are branched to the auxiliary waveguide 2 are taken out from coaxial tubes 6 by converters constituted with terminating waveguides 10a and 10b and coaxial tubes 6. Meanwhile, radio waves having the frequency f2 which are leaked to the auxiliary waveguide 2 are absorbed by radio wave absorbing bodies 12a and 12b. Consequently, cavity resonance of the frequency f2 cannot be caused in the auxiliary waveguide 2, and radio waves having the frequency f2 which are leaked to the auxiliary waveguide 2 have no influence upon radio waves having the frequency f2 which pass through a main waveguide 1, and the increase of loss and a delay distortion are not generated. |
