Journal
IEEE TRANSACTIONS ON ELECTRON DEVICES
Volume 68, Issue 1, Pages 369-375Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TED.2020.3040143
Keywords
Dual-meander-line; pitch tapering; slow-wave structure (SWS); traveling wave tube (TWT)
Funding
- National Natural Science Foundation of China [61921002, 61531010, 61988102]
- Science and Technology on High Power Microwave Laboratory Fund [6142605180201]
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A novel dielectric-supported staggered dual-meander-line planar slow-wave structure is proposed for a traveling-wave tube operating at E-band. The staggered arrangement of meander-lines leads to stronger beam-wave interaction and higher output power. Simulation results show that the proposed structure can achieve high power output with maximum gain and electronic efficiency.
In this article, a novel dielectric-supported staggered dual-meander-line (DS-SDML) planar slow-wave structure (SWS) is proposed for a travelingwave tube (TWT) working at E-band. The proposed staggered arrangement of meander-lines (MLs) leads to a stronger beam-wave interaction and achieves higher output power as compared to the symmetric arrangement. The input-output couplers have been designed by using staggered stepped double ridge waveguide, to connect the standard E-band rectangular waveguide and the DS-SDML SWS. An attenuator and pitch tapering have been applied to the proposed SWS to suppress the unwanted frequencies and to improve the output power. Particle-in-cell (PIC) simulation results show that for an 11.8-kV, 200-mA sheet-beam, the output power can reach 283 W at 75 GHz, with a maximum gain and electronic efficiency of 34.5 dB and 11.9%, respectively.
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