Broadband 220-GHz Vacuum Window for a Traveling-Wave Tube Amplifier

Author

Cook, Alan M. ; Joye, Colin D. ; Kimura, Tomohiro ; Wright, Edward L. ; Calame, Jeffrey P.

Author_Institution

U.S. Naval Res. Lab., Washington, DC, USA

Volume

60

Issue

3

fYear

2013

fDate

Mar-13

Firstpage

1257

Lastpage

1259

Abstract

We present electromagnetic cold-test measurements of BeO ceramic pillbox vacuum windows for a 220-GHz traveling-wave tube amplifier. Transmission and reflection measurements show better than 20 dB return loss over a 25 GHz bandwidth, with band centers in the range of 212-225 GHz. We observe tuning of the window response as the circular waveguide length is changed. High-power testing is performed at 2.5 W, 100% duty at 218 GHz.

Keywords

beryllium compounds; ceramics; circuit testing; circular waveguides; millimetre wave amplifiers; millimetre wave tubes; travelling wave amplifiers; vacuum tubes; BeO; broadband vacuum window; ceramic pillbox vacuum windows; circular waveguide length; electromagnetic cold-test measurements; frequency 212 GHz to 225 GHz; high-power testing; power 2.5 W; reflection measurements; transmission measurements; traveling-wave tube amplifier; window response; Broadband communication; Electromagnetic waveguides; Electron tubes; Loss measurement; Millimeter wave measurements; Tuning; Waveguide transitions; High-power amplifiers; millimeter wave (mmW) devices; mmW measurements;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2012.2232929

Filename

6419798