U-shaped microstrip meander-line slow-wave structure for Ka-band traveling-wave tube

Shen, Fei; Wei, Yanyu; Xu, Xiong; Liu, Yang; Huang, Miao; Tang, Tao; Gong, Yubin

doi:10.1109/icmmt.2012.6229942

Cited by 9 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2.5 for SW2 is 30, and the simulated retardation is 30 right before cutoff. This is also observed for SW1, not shown here, SW3, shown in the next chapter, and for meander lines in [48]. The reason for the lower retardation at lower frequencies is due to a decrease in inductance as the frequency is decreased, which increases the phase velocity.…”

Section: Discussionsupporting

confidence: 71%

“…The conductor forms a transmission line over a dielectric and a ground plane. This type of circuit has not been very common for use in crossed field devices, but some interest has increased as of late [48][49][50]. Because of the flat geometry, one can use well established semiconductor fabrication techniques to manufacture meander lines, which would allow for the creation of tiny slow wave structures (<1mm) to allow for higher frequency applications.…”

Section: Meander Linementioning

confidence: 99%

“…48 shows operation where all the current is generated from primary electrons from the GFEA. This is one way where all of the electron current is injected in phase with the RF wave.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Simulation of a Crossed-Field Amplifier Using a Modulated Distributed Cathode

Pearlman¹

View full text Add to dashboard Cite

I would like to thank the Boise State University department of Electrical and Computer Engineering for financial support of this research. I thank the U.S. Air Force Office of Scientific Research for their financial support under Grant FA9550-12-C-0066. I also express my gratitude to TechX Corporation for their support of our work with Vsim and in particular David Smithe for his help. And, of course, I am immensely grateful to the review committee, Wan Kuang, Kris Campbell, Jim Browning, and Yue Ying Lau for their time and effort in validating this dissertation. I also want to thank Janos Cserna for helping develop much of the experiment, specifically the X-Y stage used to measure the dispersion. I also wish to thank Kyle Straub and Tyler Rowe for their part in developing the experimental setup, and for their collaboration.

show abstract

Section: Discussionsupporting

confidence: 71%

Section: Meander Linementioning

confidence: 99%

See 1 more Smart Citation

Simulation of a Crossed-Field Amplifier Using a Modulated Distributed Cathode

Pearlman¹

View full text Add to dashboard Cite

show abstract

“…This process can be seen as flattening the traditional helix SWS into a flat structure. In the category of planar SWSs, many different bending forms, such as V-shaped [11], U-shaped [12], angular log-periodic [13], coplanar [14], etc., have been proposed successively.…”

Section: Introductionmentioning

confidence: 99%

Study of an Attenuator Supporting Meander-Line Slow Wave Structure for Ka-Band TWT

Wang

et al. 2021

Electronics

Self Cite

View full text Add to dashboard Cite

An attenuator supporting meander-line (ASML) slow wave structure (SWS) is proposed for a Ka-band traveling wave tube (TWT) and studied by simulations and experiments. The ASML SWS simplifies the fabrication and assembly process of traditional planar metal meander-lines (MLs) structures, by employing an attenuator to support the ML on the bottom of the enclosure rather than welding them together on the sides. To reduce the surface roughness of the molybdenum ML caused by laser cutting, the ML is coated by a thin copper film by magnetron sputtering. The measured S11 of the ML is below −20 dB and S21 varies around −8 dB to −12 dB without the attenuator, while below −40 dB with the attenuator. Particle-in-cell (PIC) simulation results show that with a 4.4-kV, 200-mA sheet electron beam, a maximum output power of 126 W is obtained at 38 GHz, corresponding to a gain of 24.1 dB and an electronic efficiency of 14.3%, respectively.

show abstract

“…In order to solve the problems in fabrication, some modified SWSs and new planar SWSs have been proposed, which can be easily fabricated using microfabrication techniques or printed-circuit method. One popular kind of planar SWS is based on microstrip meander-line, such as U-shaped meander line [7], V-shaped meander line [8], S-shaped meander line [9] and angular log-periodic microstrip meander-line [10]. Another kind of planar SWS is based on modified circular helix SWS, such as rectangular helix [11] and planar helix with straight-edge connections (PH-SEC) [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Ka-band dual sheet beam traveling wave tube using supported planar ring-bar slow wave structure

Dong

Chen

Wang

et al. 2020

Journal of Electromagnetic Waves and Applications

Self Cite

View full text Add to dashboard Cite

A dual-beam planar slow wave structure (SWS), named dielectric supported ring-bar SWS is proposed in this paper. The planar SWS is supported by two dielectric rods at the side edges, making it fit for dual sheet beam operation. The high frequency and transmission characteristics of the proposed SWS are investigated. The backward-wave oscillation and higher harmonic waves are effectively suppressed by setting two cathodes in the same plane parallel to the SWS and negative phase-velocity jumping. The hot performance of the proposed SWS is carried out by using particle-in-cell (PIC) simulation, in which two sheet electron beams (9.7 kV, 0.2 A) are employed to provide direct current power. With an input power of 1W, the output power is 180 W at 38 GHz and the corresponding gain is 22.6 dB. Besides, after adding dielectric rods to the output part, the entire structure dissipates heat well by thermal analysis.

show abstract

U-shaped microstrip meander-line slow-wave structure for Ka-band traveling-wave tube

Cited by 9 publications

References 9 publications

Simulation of a Crossed-Field Amplifier Using a Modulated Distributed Cathode

Simulation of a Crossed-Field Amplifier Using a Modulated Distributed Cathode

Study of an Attenuator Supporting Meander-Line Slow Wave Structure for Ka-Band TWT

Ka-band dual sheet beam traveling wave tube using supported planar ring-bar slow wave structure

Contact Info

Product

Resources

About