A 1 kw cw traveling-wave tube amplifier for 35 Gc

This paper describes the electrical design, fabrication, and test results of a traveling-wave tube which represents a significant advancement of the State of the Art in millimeter wave power generation. The critical areas in a tube of this type are the gun, R.F. circuit, and window. This paper presents the pertinent design and construction detail necessary to develop a suitable component in each area. The tube described uses a coupled cavity R.F. circuit, with a perveance .1 × 10⁶gun producing up to 1,200 cw at a conversion efficiency of 16 per cent. Over 1 kw cw power output has been measured with this tube.