SUPPORTING RESEARCH ON BEAM INTERACTION STRUCTURES FOR TRAVELING WAVE TUBES
Abstract
An inductively coupled cavity interaction structure is described which has cold bandwidth up to 60% at any peak power level from 500 w. to 500 kw. Formulas are given for calculating the location and bandwidth of the fundamental passband, and interfering slot mode passband, and the experimental confirmation of these formulas is shown. The int raction impedance of this type of structure was measured at bandwidths from 10 to 60%. An experimental traveling-wave amplifier using one of these interaction structures, designed for a peak power output of 1 kw, was designed and tested. The circuit had a 40% cold bandwidth and provided good performance over more than 30% bandwidth. A theoretical study was made of the problem of eliminating oscillations of the interaction structure in the slot mode and at the cutoff frequencies of the desired passband. A hollow beam slow wave interaction structure provided at least an order of magnitude increase in average power handling capability over solid beam structures, because of its increased beam interception surface. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1962
- Accession Number
- AD0275016
Entities
People
- Ailing W. Scott
- R.d. Wanselow