Verzoegerungsleitung fuer Wanderfeldroehren

摘要

A delay line for travelling-wave tubes is formed by a hollow wave guide having hollow cylindrical metallic cylinders individually disposed concentrically of and spaced-apart along the longitudinal axis of the travelling-wave tube and intermediate electrodes disposed between adjacent metallic cylinders. Each of the metallic cylinders is connected to the inner wall of the wave guide on opposite sides of the wave guide from adjacent metallic cylinders. Each of the intermediate electrodes are in the form of a metallic ring which bears against the inner wall of the hollow wave guide and which includes a central inner aperture having a diameter which is substantially larger than the outer diameter of the metallic cylinders. The provision of the intermediate electrodes extends the upper and lower limiting frequencies whereby the dispersion curve of the travelling-wave tube becomes steeper and the pass band is reduced to prevent pre-oscillation and parasitic operation.