Enhancing the power of high power microwaves by using zone plate and investigations for the position of virtual cathode inside the drift tube

2018 ◽  
Vol 25 (10) ◽  
pp. 103113 ◽  
Author(s):  
Sohail Mumtaz ◽  
Jun Sup Lim ◽  
Bhagirath Ghimire ◽  
Suk Woo Lee ◽  
Jin Joo Choi ◽  
...  
Keyword(s):  
High Power ◽  
Drift Tube ◽  
Virtual Cathode ◽  
Zone Plate ◽  
High Power Microwaves

scholarly journals High-power microwave emission from a virtual cathode oscillator

1987 ◽  
Vol 5 (4) ◽  
pp. 675-681 ◽  
Author(s):  
H. Sze ◽  
J. Benford ◽  
W. Woo
Keyword(s):  
High Power ◽  
Virtual Cathode ◽  
Electron Flow ◽  
Microwave Frequency ◽  
Microwave Emission ◽  
Cathode Side ◽  
High Power Microwave ◽  
High Power Microwaves ◽  
Power Microwave ◽  
Diode Current

Pinched electron beams emit high power microwaves by formation of a virtual cathode. Radiation occurs simultaneously with pinching or slightly thereafter. Observations of strong electrostatic fields and the partitioning of current into reflexing and transmitting populations at the same time that microwaves are emitted indicate virtual cathode formation. Microwaves originate mainly from the virtual cathode side of the anode. A two-dimensional model for the electron flow in the presence of a virtual cathode is presented. The model allows for electron reflexing and velocity distribution spread. Solutions with strong radial flow agree closely with microwave measurements, and result in the microwave frequency scaling linearly with diode current.

scholarly journals A novel approach to form second virtual cathode by installing a floating zone plate inside the drift tube

2020 ◽  
Vol 17 ◽  
pp. 103052 ◽  
Author(s):  
Sohail Mumtaz ◽  
Linh Nhat Nguyen ◽  
Hansup Uhm ◽  
Pradeep Lamichhane ◽  
Suck Woo Lee ◽  
...  
Keyword(s):  
Drift Tube ◽  
Virtual Cathode ◽  
Zone Plate ◽  
Floating Zone ◽  
Novel Approach

scholarly journals Focus of High-Power Microwaves with positive and negative zone plate to increase the receiving power

2021 ◽  
Author(s):  
Jung Hyun Jang ◽  
Sohail Mumtaz ◽  
Bishwa Chandra Adhikari ◽  
Ramhari Paneru ◽  
Jun Sup Lim ◽  
...  
Keyword(s):  
High Power ◽  
Zone Plate ◽  
High Power Microwaves

High Power Microwave Generation by Double-Anode Virtual Cathode Oscillator

2019 ◽  
Vol 139 (10) ◽  
pp. 421-427
Author(s):  
Kazuki Nagao ◽  
Wataru Takatsu ◽  
Pham Van Thuan ◽  
Taichi Sugai ◽  
Weihua Jiang
Keyword(s):  
High Power ◽  
Virtual Cathode ◽  
High Power Microwave ◽  
Microwave Generation ◽  
Power Microwave

Simulation of high-power microwaves gas breakdown with a modified multi-physical model

2021 ◽  
Vol 28 (8) ◽  
pp. 083504
Author(s):  
Tiancheng Zhang ◽  
Huaguang Bao ◽  
Dazhi Ding ◽  
Rushan Chen
Keyword(s):  
Physical Model ◽  
High Power ◽  
High Power Microwaves ◽  
Gas Breakdown

Damage effects and mechanism of the silicon NPN monolithic composite transistor induced by high-power microwaves

2018 ◽  
Vol 27 (8) ◽  
pp. 088502
Author(s):  
Hui Li ◽  
Chang-Chun Chai ◽  
Yu-Qian Liu ◽  
Han Wu ◽  
Yin-Tang Yang
Keyword(s):  
High Power ◽  
High Power Microwaves
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