Design of a W-band plan alignment multiple beam travelling wave tube

2015 ◽  
Author(s):  
Cunjun Ruan ◽  
Muwu Zhang
Keyword(s):  
Travelling Wave ◽  
Wave Tube ◽  
Multiple Beam ◽  
W Band

Design of output structures for a W-band sheet beam travelling wave tube

2015 ◽  
Author(s):  
L. Y. Yang ◽  
J. X. Wang ◽  
G. Liu ◽  
G. X. Shu ◽  
Y. Zheng ◽  
...  
Keyword(s):  
Travelling Wave ◽  
Wave Tube ◽  
W Band

$W$ -Band Multiple Beam Staggered Double-Vane Traveling Wave Tube With Broad Band and High Output Power

2015 ◽  
Vol 43 (7) ◽  
pp. 2132-2139 ◽  
Author(s):  
Cunjun Ruan ◽  
Muwu Zhang ◽  
Jun Dai ◽  
Changqing Zhang ◽  
Shuzhong Wang ◽  
...  
Keyword(s):  
Output Power ◽  
Traveling Wave ◽  
Broad Band ◽  
High Output Power ◽  
Traveling Wave Tube ◽  
Wave Tube ◽  
Multiple Beam ◽  
W Band ◽  
High Output

scholarly journals Design and Preliminary Experiment of W-Band Broadband TE02 Mode Gyro-TWT

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1950
Author(s):  
Xu Zeng ◽  
Chaohai Du ◽  
An Li ◽  
Shang Gao ◽  
Zheyuan Wang ◽  
...  
Keyword(s):  
Travelling Wave ◽  
Duty Ratio ◽  
High Resolution Imaging ◽  
Electron Optical System ◽  
Wave Tube ◽  
Parasitic Mode ◽  
Saturated Gain ◽  
Imaging Radar ◽  
W Band ◽  
Resolution Imaging

The gyrotron travelling wave tube (gyro-TWT) is an ideal high-power, broadband vacuum electron amplifier in millimeter and sub-millimeter wave bands. It can be applied as the source of the imaging radar to improve the resolution and operating range. To satisfy the requirements of the W-band high-resolution imaging radar, the design and the experimentation of the W-band broadband TE02 mode gyro-TWT were carried out. In this paper, the designs of the key components of the vacuum tube are introduced, including the interaction area, electron optical system, and transmission system. The experimental results show that when the duty ratio is 1%, the output power is above 60 kW with a bandwidth of 8 GHz, and the saturated gain is above 32 dB. In addition, parasitic mode oscillations were observed in the experiment, which limited the increase in duty ratio and caused the measured gains to be much lower than the simulation results. For this phenomenon, the reasons and the suppression methods are under study.

scholarly journals Multiple-beam and double-mode staggered double vane travelling wave tube with ultra-wide band

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Zheng Zhang ◽  
Cunjun Ruan ◽  
Ayesha Kosar Fahad ◽  
Chenyu Zhang ◽  
Yiyang Su ◽  
...  
Keyword(s):  
Output Power ◽  
Wave Structure ◽  
Wide Band ◽  
Cold Test ◽  
Travelling Wave ◽  
Numerical Control ◽  
Ultra Wideband ◽  
Ultra Wide Band ◽  
Wave Tube ◽  
Multiple Beam

AbstractThis paper presents design, fabrication and cold test of an ultra-wide band travelling wave tube (TWT) with planar alignment multiple pencil beams. The fundamental double-mode of staggered double vane slow wave structure (SDV-SWS) rather than the only one mode are put forward and adopted to match with the same electron beam to increase the bandwidth greatly. Simultaneous planar alignment multiple pencil beam tunnels are designed to improve interaction impedance and then to enhance output power, gain, efficiency, growth rate. The transmission performance of a two-stage 51-period SDV-TWT in G-band with structure attenuator between two sections shows that it indeed has an ultra-wideband performance from 81 to 110 GHz. By using computer numerical control machining, the SDV-SWS was manufactured and a detailed cold test was conducted. Good agreement is found at the wide band, where S21 is above − 5 dB and S11 is below − 10 dB. 3D PIC simulations with double-mode multiple-beam SDV-TWT within total length of 70 mm show that it can get a nearly 2120 W peak output power, a 42.5 dB corresponding gain and a 10.7% electron efficiency at 94 GHz with a 22.1 kV beam voltage and a 3 × 0.15A beam current. The 3 dB bandwidth of our double-mode SDV-TWT can achieve about 29 GHz.

Development of a Sub-terahertz Sheet Beam Travelling Wave Tube

2020 ◽  
Author(s):  
Guoxiang Shu ◽  
Zhihui Ouyang ◽  
Lin Zhang ◽  
Jiacai Liao ◽  
Junchen Ren ◽  
...  
Keyword(s):  
Travelling Wave ◽  
Wave Tube
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