DEVELOPMENT OF TWO X-BAND VARIABLE GAIN TWTS (ONE LOW LEVEL AND ONE MEDIUM LEVEL).
Abstract
The general behaviour of the TWT gain with varying helix voltage is discussed. Gain change is frequency sensitive due to b-parameter variation. Traveling-wave tubes in X- and S-bands were tested. Gain in both tubes changed more at the high than at the low frequency end of the band. Effects of helix-voltage change on both noise figure and saturated power output was measured and related to theory. It was decided that the best approach to the problem would be a four-helix structure. The input helix is used to establish noise figure, the output helix to generate gain, and the intermediate helices for gain control. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1964
- Accession Number
- AD0608656