Pulsed Power Combining System for W-Band Traveling Wave Tube Amplifiers With a Waveguide Combiner

Author

Junxiang Ge ; Yong Zhou ; Bing Yu ; Cheng Zhu ; Junping Zhou ; Jiaqiang Li ; Fayu Wan ; Jinjun Feng ; Jun Cai ; Xianping Wu

Author_Institution

Jiangsu Key Lab. of Meteorol. Obs. & Signal Process., Nanjing Univ. of Inf. Sci. & Technol., Nanjing, China

Volume

61

Issue

9

fYear

2014

fDate

Sept. 2014

Firstpage

3317

Lastpage

3323

Abstract

A W-band high power combining system was designed to enhance the transmitter power for increasing weather radar´s detection ability to small cloud particles and detection distance. The high power combiner with high isolation between the input ports was designed and manufactured. The effects of amplitude and phase differences on the combining efficiency were examined. The W-band pulse power combining experiment for two home-made traveling wave tube (TWT) amplifiers were carried out with the high power combiner at the frequency range of 93.5-94.5 GHz. The output pulse power from the two TWTs are about 100 W and 120 W, respectively, with duty cycle 4%, and the combining efficiency is above 79%, with the maximum efficiency 84.6% at 94 GHz. The maximum output power of the combining system reaches 194 W at 94.3 GHz.

Keywords

power combiners; travelling wave amplifiers; travelling wave tubes; W-band high power combining system; W-band traveling wave tube amplifiers; amplitude effects; frequency 93.5 GHz to 94.5 GHz; frequency 94.3 GHz; phase differences; power 100 W; power 120 W; power 194 W; pulsed power combining system; waveguide combiner; weather radar; Couplings; Delay effects; Insertion loss; Meteorology; Power combiners; Power dividers; Power generation; Power combining; W-band; traveling wave tube (TWT);

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2014.2341615

Filename

6871318