Results 41 to 50 of about 64,113 (168)

Photonic microwave generation with high-power photodiodes [PDF]

Optics Letters, 2013
3 pages, 3 ...
Fortier, Tara M., Quinlan, Franklyn, Hati, Archita, Nelson, Craig, Taylor, Jennifer A., Fu, Yang, Campbell, Joe, Diddams, Scott A.   +7 more
openaire   +3 more sources

Effect of Imaging Range on Performance of Terahertz Coded-Aperture Imaging

Sensors
This paper reveals a counterintuitive, non-monotonic dependence of terahertz coded-aperture imaging (TCAI) performance on the imaging range. This phenomenon stems from phase-induced spatiotemporal correlations in the reference-signal matrix (RSM ...
Yan Teng, Haodong Yang, Xinhong Cui, Xiaoze Li, Yanchao Shi   +4 more
doaj   +1 more source

Nonlinear Distortion in a Microwave High Power Amplifier [PDF]

2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA), 2019
In this paper the high-power amplifier CGHV31500F designed for the radar S-Band application is studied. The amplifier module is based on GaN HEMT encapsulated internally matched transistor, delivering more than 500 W in a pulse regime. Nonlinear model of this amplifier was developed and nonlinear distortion of a standard radar signal and of possible ...
Bezoušek, Pavel, Matoušek, David, Rejfek, Luboš   +2 more
openaire   +2 more sources

Numerical study of matching conditions and optimum structure of an input coupler for a 0.34-THz extended-interaction klystron

AIP Advances, 2017
To develop a reliable and stable EIK at 0.34 THz, an analysis of the input circuit is presented and some aspects regarding the practicalities of the device are specifically discussed. The structure of the coupler is first optimized to
Shuang Li, Guangqiang Wang, Dongyang Wang   +2 more
doaj   +1 more source

Micro-effects of surface polishing treatment on microscopic field enhancement and long vacuum gap breakdown

AIP Advances, 2016
In this paper, three surface polishing treatments were employed to treat plate titanium electrodes, and microscopic surfaces of the electrodes after polishing were presented.
Yu Zhang, Jiancang Su, Xudong Qiu, Rui Li, Liang Zhao, Jie Cheng, Bo Zeng   +6 more
doaj   +1 more source

Data-Driven Sensitivity Analysis and Hybrid Multi-Objective Optimization for Ultra-High Performance Klystron

IEEE Access
This study presents a data-driven framework integrating sensitivity analysis with hybrid multi-objective optimization to improve both the physical performance and design efficiency of high-performance klystrons.
Hezhang Zhao, Limin Sun, Shifeng Li, Hu He, Hua Huang, Zhenbang Liu, Wenhao Wang, Ke He, Dongwenlong Wu, Hongge Ma   +9 more
doaj   +1 more source

Polarization controllable TM01-TE11 mode converter for high power microwaves

AIP Advances, 2018
An X-band GW-level polarization controllable TM01-TE11 mode converter for high power microwave (HPM) systems is proposed. The mode converter consists of a TM01-TE10 mode coupler, a TE11-TE10 mode coupler and four phase shifters.
J. W. Li, G. J. Deng, L. T. Guo, W. H. Huang, H. Shao   +4 more
doaj   +1 more source

Spatial Harmonic Characteristics and Power Handling Capacity of High-Order TM₀m Modes in Overmoded Slow-Wave Structure

IEEE Access
Aiming at the power handling capacity bottleneck of the relativistic backward-wave oscillators (RBWO), this paper systematically investigates the spatial harmonic and power handling capacity characteristics of higher-order azimuthally symmetric ...
Yan Teng, Dongyang Wang, Sen Wang, Shuang Li, Haodong Yang   +4 more
doaj   +1 more source

High‐power microwave bipolar transistor modeling

Microwave and Optical Technology Letters, 1992
AbstractThis article introduces a model for high‐power microwave bipolar transistors and its associated parameter‐measuring strategy, whose inclusion of thermal phenomena in the dc characterization allows a good estimate of the device's thermal resistance to be obtained.
Asensio López, Alberto, Pérez Martínez, Félix   +1 more
openaire   +2 more sources

Physics-Constrained Conditional Inverse Design of Relativistic Klystrons via a Split-Merge Tandem Framework

IEEE Access
The development of Relativistic Klystron Amplifiers (RKAs) has long been hindered by prolonged design cycles, primarily due to the strong nonlinearity of beam-wave interactions, the high dimensionality of the parameter space, and the prohibitive ...
Hezhang Zhao, Xiangyang Bao, Qian Zhang, Limin Sun, Hu He, Hua Huang, Zhengbang Liu, Ke He, Dongwenlong Wu, Hongge Ma, Shifeng Li   +10 more
doaj   +1 more source