A Modified Double Staggered Grating Waveguide Slow Wave Structure for Sub-THz Traveling Wave Tubes

A modified double staggered grating waveguide (DSGW) slow wave structure (SWS) is proposed for millimeter-wave and sub-THz traveling wave tubes (TWTs). Gratings with a cross section outline of exponential curves are applied instead of the traditional rectangular cross section. The proposed SWS owns...

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Published inIEEE transactions on electron devices Vol. 70; no. 6; pp. 1 - 7
Main Authors Zhao, Chen, Xu, Hang
Format Journal Article
LanguageEnglish
Published New York IEEE 01.06.2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Blades
Couplers
Cross-sections
Design optimization
Double staggered grating waveguide (DSGW)
Electric fields
Electron beams
Gain
Gratings
Impedance
Maximum power
Millimeter waves
Power generation
slow wave structure (SWS)
sub-THz
traveling wave tube (TWTs)
Traveling wave tubes
Traveling waves
Waveguides
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Abstract A modified double staggered grating waveguide (DSGW) slow wave structure (SWS) is proposed for millimeter-wave and sub-THz traveling wave tubes (TWTs). Gratings with a cross section outline of exponential curves are applied instead of the traditional rectangular cross section. The proposed SWS owns a higher interaction impedance compared to DSGW, resulting in higher output power and gain. With proper design and optimization of the input-output couplers, the proposed SWS can have a wide <inline-formula> <tex-math notation="LaTeX">-</tex-math> </inline-formula>15 dB impedance bandwidth, extending from 192 to 230 GHz. Particle-in-cell (PIC) simulations are carried out for a TWT with sheet electron beam (SEB) and the main SWS having 70 periods. Such a TWT provides a maximum power of 116.64 W which indicates a significant improvement compared with the traditional DSGW.
AbstractList A modified double staggered grating waveguide (DSGW) slow wave structure (SWS) is proposed for millimeter-wave and sub-THz traveling wave tubes (TWTs). Gratings with a cross Section outline of exponential curves are applied instead of the traditional rectangular cross section. The proposed SWS owns a higher interaction impedance compared to DSGW, resulting in higher output power and gain. With proper design and optimization of the input–output couplers, the proposed SWS can have a wide −15 dB impedance bandwidth, extending from 192 to 230 GHz. Particle-in-cell (PIC) simulations are carried out for a TWT with sheet electron beam (SEB) and the main SWS having 70 periods. Such a TWT provides a maximum power of 116.64 W which indicates a significant improvement compared with the traditional DSGW.
A modified double staggered grating waveguide (DSGW) slow wave structure (SWS) is proposed for millimeter-wave and sub-THz traveling wave tubes (TWTs). Gratings with a cross section outline of exponential curves are applied instead of the traditional rectangular cross section. The proposed SWS owns a higher interaction impedance compared to DSGW, resulting in higher output power and gain. With proper design and optimization of the input-output couplers, the proposed SWS can have a wide <inline-formula> <tex-math notation="LaTeX">-</tex-math> </inline-formula>15 dB impedance bandwidth, extending from 192 to 230 GHz. Particle-in-cell (PIC) simulations are carried out for a TWT with sheet electron beam (SEB) and the main SWS having 70 periods. Such a TWT provides a maximum power of 116.64 W which indicates a significant improvement compared with the traditional DSGW.
Author Xu, Hang
Zhao, Chen
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Snippet A modified double staggered grating waveguide (DSGW) slow wave structure (SWS) is proposed for millimeter-wave and sub-THz traveling wave tubes (TWTs)....
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SubjectTerms Blades
Couplers
Cross-sections
Design optimization
Double staggered grating waveguide (DSGW)
Electric fields
Electron beams
Gain
Gratings
Impedance
Maximum power
Millimeter waves
Power generation
slow wave structure (SWS)
sub-THz
traveling wave tube (TWTs)
Traveling wave tubes
Traveling waves
Waveguides
Title A Modified Double Staggered Grating Waveguide Slow Wave Structure for Sub-THz Traveling Wave Tubes
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Volume 70
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