Low noise, low phase distortion 120 W K-band TWT

Author

Komm, D.S. ; Menninger, W.L. ; Robbins, N.R.

Author_Institution

Boeing Electron Dynamic Devices, Inc., Torrance, CA, USA

fYear

2002

fDate

2002

Firstpage

42

Lastpage

43

Abstract

Summary form only given. Boeing Electron Dynamic Devices (EDD) has continued the development of a special class of low phase distortion TWTs optimized for digital communications in the 18-21 GHz frequency band. The first of these devices, the model 995H, featured extremely low AM/PM conversion of only 2°/dB. This paper reports the development of a new version, the model 995HA, wherein we have reduced the noise power of the device while continuing to maintain the low phase distortion. The 995HA has a basic electronic efficiency of 18%. Using a multi-stage depressed collector, the TWT has an overall efficiency at saturation of approximately 55%. These low efficiencies are a result of the circuit design trade-offs needed to produce the low phase distortion characteristics.

Keywords

digital communication; electric distortion; electron device noise; microwave tubes; phase noise; travelling wave tubes; 120 W; 18 percent; 18 to 21 GHz; 55 percent; AM/PM conversion; Boeing Electron Dynamic Devices; K-band TWT; basic electronic efficiency; design trade-offs; device noise power; digital communications; low noise travelling wave tube; low phase distortion TWT; low phase distortion characteristics; model 995HA TWT; multi-stage depressed collector; saturation efficiency; Digital communication; Electrons; Frequency; K-band; Linearity; Noise figure; Noise reduction; Phase distortion; Phase noise; Power system modeling;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2002. IVEC 2002. Third IEEE International

Print_ISBN

0-7803-7256-5

Type

conf

DOI

10.1109/IVELEC.2002.999250

Filename

999250