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Analysis of 140 gigahertz folded frame travelling wave tube
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10.1063/1.4826589
/content/aip/journal/pop/20/10/10.1063/1.4826589
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/10/10.1063/1.4826589

Figures

Image of FIG. 1.
FIG. 1.

Sketch of the symmetric double V-shape meander-line SWS (a) and the FF SWS (b). The FF SWS can be seen as a three dimensional extension of the symmetric double V-shaped microstrip meander-line SWS.

Image of FIG. 2.
FIG. 2.

The top view (a) and side view (b) of the FF SWS with dimensional parameters.

Image of FIG. 3.
FIG. 3.

Dispersion characteristics and interaction impedances of the FF SWS. At the design frequency (140 GHz), the FF SWS has lower phase velocity and larger average interaction impedance.

Image of FIG. 4.
FIG. 4.

Dispersion curves and interaction impedances for different transverse widths .

Image of FIG. 5.
FIG. 5.

Dispersion curves and interaction impedances for different half bending angles of the V-shape .

Image of FIG. 6.
FIG. 6.

Dispersion curves and interaction impedances for different vertical heights .

Image of FIG. 7.
FIG. 7.

3-D sketch of FF SWS TWT model by CST.

Image of FIG. 8.
FIG. 8.

Reflection loss S parameters in dB at the input port.

Image of FIG. 9.
FIG. 9.

Input and output signals of FF TWT at 140 GHz.

Image of FIG. 10.
FIG. 10.

Electron kinetic energy of FF TWT at 140 GHz versus longitudinal distance.

Image of FIG. 11.
FIG. 11.

Spectrum of the output signal.

Image of FIG. 12.
FIG. 12.

Plot of output power and electron efficiency of FF TWT versus frequency.

Image of FIG. 13.
FIG. 13.

The comparison of electron efficiency between the folded frame TWT and the symmetric double V-shaped meander-line TWT.

Image of FIG. 14.
FIG. 14.

Plot of input power versus gain at 140 GHz.

Image of FIG. 15.
FIG. 15.

Plot of saturated gain of the FF TWT versus frequency.

Tables

Generic image for table
Table I.

Optimized parameters of FFSWS working on 140 GHz.

Generic image for table
Table II.

Optimized electrical parameters for FF SWS TWT.

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/content/aip/journal/pop/20/10/10.1063/1.4826589
2013-10-22
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Analysis of 140 gigahertz folded frame travelling wave tube
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/10/10.1063/1.4826589
10.1063/1.4826589
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