Development of diamond windows for traveling wave tube harmonic amplifier in terahertz

Author

Lili Li ; Mingqing Ding ; Jun Cai ; Yinghua Du ; Xianping Wu ; Jinjun Feng

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Vacuum Electron., Beijing Vacuum Electron. Res. Inst., Beijing, China

fYear

2015

fDate

27-29 April 2015

Firstpage

1

Lastpage

3

Abstract

The traveling wave tube (TWT) harmonic Amplifier in terahertz (THAT) proposed in this laboratory is a novel TWT amplifier which can be used for high-power and wide-band THz vacuum radiation sources. One of the key components of THAT is the microwave window. This paper presents design and fabrication of the harmonic output window. The results of the diamond window indicated a transmission loss (S21) below 1.1dB, and VSWR ≤ 1.45 from 175 to 185 GHz. The THAT with the diamond window achieved a maximum saturated harmonic output power of 500mW with conversion gain of 28dB.

Keywords

diamond; submillimetre wave amplifiers; travelling wave amplifiers; THAT; TWT harmonic amplifier in terahertz; VSWR; conversion gain; diamond windows; frequency 175 GHz to 185 GHz; gain 28 dB; harmonic output window; microwave window; power 500 mW; saturated harmonic output power; transmission loss; traveling wave tube harmonic amplifier; wide-band THz vacuum radiation sources; Diamonds; Fabrication; Harmonic analysis; Microwave amplifiers; Propagation losses; Solid modeling; diamond window; harmonic amplifier; transmission loss;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference (IVEC), 2015 IEEE International

Conference_Location

Beijing

Print_ISBN

978-1-4799-7109-1

Type

conf

DOI

10.1109/IVEC.2015.7223883

Filename

7223883