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.

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

scholarly journals Simulation Framework for a 3-D High-Resolution Imaging Radar at 300 GHz with a Scattering Model Based on Rendering Techniques

2017 ◽  
Vol 7 (4) ◽  
pp. 404-414 ◽  
Author(s):  
Guillermo Ortiz-Jimenez ◽  
Federico Garcia-Rial ◽  
Luis A. Ubeda-Medina ◽  
Rafael Pages ◽  
Narciso Garcia ◽  
...  
Keyword(s):  
High Resolution ◽  
High Resolution Imaging ◽  
Simulation Framework ◽  
Scattering Model ◽  
Imaging Radar ◽  
Model Based ◽  
Resolution Imaging ◽  
Rendering Techniques

Surface Roughness and Microwave Surface Scattering of High-Resolution Imaging Radar

2015 ◽  
Vol 12 (4) ◽  
pp. 756-760 ◽  
Author(s):  
Sang-Eun Park ◽  
Laurent Ferro-Famil ◽  
Sophie Allain ◽  
Eric Pottier
Keyword(s):  
Surface Roughness ◽  
High Resolution ◽  
Surface Scattering ◽  
High Resolution Imaging ◽  
Imaging Radar ◽  
Resolution Imaging

A low cost approach for realization of W band folded waveguide travelling wave tube

2016 ◽  
Author(s):  
Rajiv Panigrahi ◽  
K J Vinoy ◽  
M. Joy Thomas
Keyword(s):  
Low Cost ◽  
Travelling Wave ◽  
Wave Tube ◽  
Cost Approach ◽  
Folded Waveguide ◽  
W Band

High Power Laser and Particle Beams, 2012, 24(1):7-9)Signal processing for 0.14 THz high resolution imaging radar

2013 ◽  
Vol 25 (6) ◽  
pp. 1577-1581
Author(s):  
成彬彬 Cheng Binbin ◽  
江舸 Jiang Ge ◽  
杨陈 Yang Chen ◽  
蔡英武 Cai Yingwu
Keyword(s):  
Signal Processing ◽  
High Resolution ◽  
High Power ◽  
High Resolution Imaging ◽  
High Power Laser ◽  
Power Laser ◽  
Particle Beams ◽  
Imaging Radar ◽  
Resolution Imaging

Research on Jamming Effect Evaluation Method of ISAR Using Moment Invariants

2010 ◽  
Vol 40-41 ◽  
pp. 909-912
Author(s):  
Xue Lei ◽  
Cui Rui ◽  
Zhu Jing
Keyword(s):  
Evaluation Method ◽  
Synthetic Aperture ◽  
Moment Invariants ◽  
High Resolution Imaging ◽  
Effect Evaluation ◽  
Imaging Radar ◽  
Resolution Imaging ◽  
The Difference ◽  
Image Disposal ◽  
Jamming Effect

The Inverse Synthetic Aperture Radar (ISAR) is a high resolution imaging radar. Some methods used to evaluate the jamming effect of general radar are unsuitable to ISAR. Considering the principle of radar jamming and the theory of image disposal, the paper gives a new evaluation method of barrage jamming effect on ISAR, it evaluates the jamming effect through calculating the difference of two picture’s Moment Invariants, and this method can reflect distortion degree of the jammed target during the whole jamming process. The results of simulation prove the method is corrective and effective.

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