Integrated Microstrip Meander Line Traveling Wave Tube Based on Metamaterial Absorber

An integrated microstrip meander line (MML) slow-wave structure (SWS) comprised of an MML SWS and compact wideband metamaterial absorber (MMA) is proposed and demonstrated theoretically and experimentally in this paper. The MMA consists of metallic rectangular resonators with a metallic ground plane...

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Bibliographic Details
Published in:IEEE transactions on electron devices 2017-07, Vol.64 (7), p.2949-2954
Main Authors: Bai, Ningfeng, Feng, Cheng, Liu, Yuntao, Fan, Hehong, Shen, Changsheng, Sun, Xiaohan
Format: Article
Language:English
Subjects:
Absorption
Attenuation
Attenuator
Attenuators
Bandwidth
Bandwidths
Broadband
Copper
Dielectrics
Electron tubes
Ground plane
metamaterial absorber (MMA)
Metamaterials
microstip meander line slow-wave structure (MML SWS)
Microstrip
Peak frequency
Polymethyl methacrylate
Power gain
Resonators
Simulation
traveling wave tube (TWT)
Traveling wave tubes
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Summary:An integrated microstrip meander line (MML) slow-wave structure (SWS) comprised of an MML SWS and compact wideband metamaterial absorber (MMA) is proposed and demonstrated theoretically and experimentally in this paper. The MMA consists of metallic rectangular resonators with a metallic ground plane and a separating dielectric layer. Simulation results show that the MMA has multidistinctive absorption peaks; the bandwidth at 56-GHz peak frequency is reach up to 30 GHz. The integrated MML SWS can provide flatter gain response of output power than that made by the MML SWS with a traditional resistive coating attenuator. Experimental results are in close agreement with simulation results. A traveling wave tube (TWT) is simulated based on this integrated MML SWS. The output power of this TWT is 48.21 W at 33 GHz corresponding to a maximum gain of 30.3 dB; the output power gain is greater than 25 dB across the entire working frequency range.
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2017.2706368