Development of a wide-band HE11 mode window for a W-band gyro-TWA

Author

Donaldson, Craig R. ; McElhinney, Paul ; Liang Zhang ; Wenlong He

Author_Institution

Dept. of Phys., Univ. of Strathclyde, Glasgow, UK

fYear

2015

fDate

27-29 April 2015

Firstpage

1

Lastpage

2

Abstract

Microwave windows are a critical component in gyrotron-traveling wave amplifiers (gyro-TWAs). They are used to couple in or out microwave power whilst maintaining the vacuum inside the beamtube. Broadband windows are very difficult to manufacture, especially for microwave amplifiers which require a very low reflection. Presented in this paper is the design, simulation and measurement of a wide-band (90 to 100 GHz) multilayer microwave window using the HE11 mode as the input microwave mode. The simulated performance shows a better than -30 dB reflection over a 10% bandwidth of 90-100 GHz. The measured window is in very good agreement with the simulated results.

Keywords

gyrotrons; travelling wave amplifiers; travelling wave tubes; W-band gyro-TWA; beamtube; broadband windows; frequency 90 GHz to 100 GHz; gyrotron-traveling wave amplifiers; microwave amplifiers; microwave power; microwave windows; multilayer microwave window; Ceramics; Frequency measurement; Resonant frequency; gyro-amplifier; microwave window; multilayer window;

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.2015.7223781

Filename

7223781