Simulation Analysis of Interaction in O-Type Devices with CRL Type Slow-Wave Structures

This paper discusses the modeling of the process of interaction in traveling-wave tubes (TWTs) based on “coaxial-radial line”-type (CRL-type) slow-wave structures (SWSs). One of the most important tasks while designing TWTs is to achieve high output power over wide range of frequencies. The aim of this paper is to try to solve this problem by combining the broad passband which is exhibited by spiral SWSs and good heat dissipation of “chain of coupled cavities” -type SWSs. As a result of this work, an algorithm for calculating the characteristics of transparent multi-beam TWT based on the SWS of the CRL-type and a method for designing TWT data have been developed. The calculation of transparent TWT was carried out. The calculation results show that in such TWT the problem of obtaining high power in combination with good heat dissipation can be solved. In addition, the developed program allows designing both transparent and sectioned TWTs.