Title :
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
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;
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/TED.2012.2232929
