P2-20: Harmonics and inter-modulation analyses for 140W short-length TWT

Author

Srivastava, Vishnu ; Kumar, Dheeraj ; Jain, Abhishek ; Sharma, R.K.

Author_Institution

MWT Div., Council of Sci. & Ind. Res., Pilani, India

fYear

2010

fDate

18-20 May 2010

Firstpage

261

Lastpage

262

Abstract

Ku-band 140W short-length space TWT has been designed for two different beam parameters. Design-I was carried out at beam voltage/current 5.9kV/100mA for gain (>25dB) and electronic efficiency (>25%). Design-II was done at beam voltage/current 4.4kV/188mA for high gain (>50dB) and efficiency (>17%). Higher-order harmonics and inter-modulation (I/M) components for both designs were analyzed using in-house developed SUNRAY- 1D and SUNRAY-2.5D codes. Accuracy of these codes was ascertained from comparison of the simulated results with the experimental results against an in-house designed and developed C-band 60W Space TWT. Both harmonic and inter-modulation components are less for design-II compared to design-I. Gain variation over the frequency band is also found less for Design-II. Major advantage of Design-I is its much higher electronic efficiency.

Keywords

harmonics; intermodulation; microwave amplifiers; travelling wave tubes; SUNRAY- 1D code; SUNRAY-2.5D code; beam current; beam parameter; beam voltage; current 100 mA; current 188 mA; design-II; electronic efficiency; gain variation; higher-order harmonics; intermodulation analysis; microwave amplifier; power 140 W; short-length space TWT; voltage 4.4 kV; voltage 5.9 kV; Aerospace industry; Councils; Design engineering; Frequency; Harmonic analysis; Impedance; Industrial electronics; Microwave amplifiers; Propagation constant; Voltage; Microwave amplifier; SL-TWT; harmonics; inter-modulation components;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference (IVEC), 2010 IEEE International

Conference_Location

Monterey, CA

Print_ISBN

978-1-4244-7098-3

Type

conf

DOI

10.1109/IVELEC.2010.5503504

Filename

5503504