Symmetric Double V-Shaped Microstrip Meander-Line Slow-Wave Structure for W-Band Traveling-Wave Tube

A design study for a low-voltage, high-efficiency, and wide-bandwidth W-band traveling-wave tube using a symmetric double V-shaped microstrip meander-line slow-wave structure combined with a sheet electron beam is described in this paper. The electromagnetic characteristics including the dispersion characteristics, interaction impedance, and transmission characteristics of this structure are presented, and the beam-wave interaction is calculated using particle-in-cell algorithms. Our study shows that, when the design voltage and current of the sheet electron beam are set to 4570 V and 100 mA, respectively, this miniature millimeter-wave power amplifier is capable of delivering several tens of watts output power, and the peak output power is about 110 W with a corresponding gain of 31.4 dB and an averaged electronic efficiency of 12% at 94 GHz.

[1]  D. Malta,et al.  95 GHz helical TWT design , 2009, 2009 IEEE International Vacuum Electronics Conference.

[2]  Jinjun Feng,et al.  Analysis and Test Preparation of Attenuator for W-band Folded Waveguide TWT , 2007, 2007 IEEE International Vacuum Electronics Conference.

[3]  Chao Zhang,et al.  Dielectric Properties of Boron Nitride Filled Epoxy Composites , 2006, 2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena.

[4]  Zhongxiang Shen,et al.  Planar Helix With Straight-Edge Connections in the Presence of Multilayer Dielectric Substrates , 2010, IEEE Transactions on Electron Devices.

[5]  R. Begum,et al.  A 500-W coupled-cavity TWT for Ka-band communication , 2005, IEEE Transactions on Electron Devices.

[6]  Hongrui Jiang,et al.  Microfabrication and Characterization of a Selectively Metallized W-Band Meander-Line TWT Circuit , 2009, IEEE Transactions on Electron Devices.

[7]  B.G. James,et al.  A ladder circuit coupled-cavity TWT at 80-100 GHz , 1986, 1986 International Electron Devices Meeting.

[8]  M. K. Alaria,et al.  Design and Development of Helix Slow-Wave Structure for Ku-Band TWT , 2011, IEEE Transactions on Plasma Science.

[9]  W. Menninger,et al.  Latest Advancements in High-Power Millimeter-Wave Helix TWTs , 2010, IEEE Transactions on Plasma Science.

[10]  Yubin Gong,et al.  Dispersion Characteristics of a Rectangular Helix Slow-Wave Structure , 2008, IEEE Transactions on Electron Devices.

[11]  Zhongxiang Shen,et al.  Effective Dielectric Constant Method for a Planar Helix With Straight-Edge Connections , 2009, IEEE Electron Device Letters.

[12]  Hongrui Jiang,et al.  A selectively metallized, microfabricated W-band meander line TWT circuit , 2008, 2008 IEEE International Vacuum Electronics Conference.

[13]  S. K. Datta,et al.  Analysis of Ridge-Loaded Folded-Waveguide Slow-Wave Structures for Broadband Traveling-Wave Tubes , 2010, IEEE Transactions on Electron Devices.

[14]  R. J. Temkin,et al.  Vacuum Electronic High Power Terahertz Sources , 2011, IEEE Transactions on Terahertz Science and Technology.

[15]  Liao Fujiang,et al.  Cold-Test Characteristics Simulation of Microstrip Meander-Line Slow Wave Structure , 2006 .

[16]  John H. Booske,et al.  Plasma physics and related challenges of millimeter-wave-to-terahertz and high power microwave generationa) , 2008 .

[17]  Y. Gong,et al.  Experimental Investigation of a High-Power Ka-Band Folded Waveguide Traveling-Wave Tube , 2011, IEEE Transactions on Electron Devices.

[18]  D. Marsden,et al.  650 GHz traveling wave tube amplifier , 2008, 2008 33rd International Conference on Infrared, Millimeter and Terahertz Waves.

[19]  Edward K. N. Yung,et al.  Dispersion characteristics of a novel shielded periodic meander line , 1996 .

[20]  Jinjun Feng,et al.  A Novel V-Shaped Microstrip Meander-Line Slow-Wave Structure for W-band MMPM , 2012, IEEE Transactions on Plasma Science.