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Journal of Electronic Science and Technology 2022年第4期20卷 375-382页

作者： Fei Yuan Chao Jing Meng-Ke Wang Shang-Jian Zhang Zhi-Yao Zhang Yong Liu School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731

Integrated electro-absorption-modulated distributed feedback laser diodes(EMLs)are attracting much interest in optical communications for the advantages of a compact structure,low power consumption,and high-speed *** integrated EML,the microwave interaction between the distributed feedback laser diode(DFB-LD)and the electro-absorption modulator(EAM)has a nonnegligible influence on the modulation performance,especially at the high-frequency *** this paper,integrated EML was investigated as a three-port network with two electrical inputs and a single optical output,where the scattering matrix of the integrated device was theoretically deduced and experimentally *** on the theoretical model and the measured data,the microwave equivalent circuit model of the integrated device was established,from which the microwave interaction between DFB-LD and EAM was successfully *** results reveal that the microwave interaction within integrated EML contains both the electrical isolation and optical *** electrical isolation is bidirectional while the optical coupling is directional,which aggravates the microwave interaction in the direction from DFB-LD to EAM.

关键词： Distributed feedback laser diode(DFB-LD) electro-absorption modulator(EAM) equivalent circuit model microwave interaction scattering parameters

Coupling Enhancement of THz Metamaterials Source with Parallel Multiple Beams

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Chinese Journal of Electronics 2023年第4期32卷 678-682页

作者： ZHANG Kaichun FENG Yuming ZHAO Xiaoyan HU Jincheng XIONG Neng GUO Sidou TANG Lin LIU Diwei THz Center School of Electronic Science and Engineering University of Electronic Science and Technology of China

In this paper, we propose a terahertz radiation source over the R-band(220–325 GHz) based on metamaterials(MTMs) structure and parallel multiple beams. The effective permittivity and permeability of the slow-wave structure can be obtained through the S-parameter retrieval approach, using numerical simulation. Additionally, the electromagnetic properties of the MTMs structure are analyzed, including the dispersion and the coupling impedance. Furthermore, we simulate the beamwave interaction of the backward oscillator(BWO) with MTMs structure and parallel multiple beams by 3-D particle-in-cell code. It is observed that parallel multiple beams can highly enhance the beam-wave interaction and greatly enlarge the output power. These results indicate that the saturated(peak) output power is approximately63W with the efficiency of roughly 6% at the operating frequency of 231 GHz, under the beam voltage of 35 kV and total current of 30 mA(6-beam) respectively. Meanwhile, the BWO can generate power of 10–80 W in the tunable frequency of 220–240 GHz.

关键词： Couplings Simulation Voltage Terahertz radiation Metamaterials scattering parameters Impedance

基于散射参数的船用电力电缆模型验证(英文)

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高电压技术 2011年第11期37卷 2836-2842页

作者： Lukas Graber Diomar Infante Michael Steurer William W.Brey Center for Advanced Power Systems.Florida State University Tallahassee.FL32310 USA National High Magnetic Field Laboratory Florida State UniversityTallahasseeFL32310 USA

Careful analysis of transients in shipboard power systems is important to achieve long life times of the components in future all-electric *** order to accomplish results with high accuracy,it is recommended to validate cable models as they have significant influence on the amplitude and frequency spectrum of voltage *** authors propose comparison of model and measurement using scattering *** can be easily obtained from measurement and simulation and deliver broadband information about the accuracy of the *** measurement can be performed using a vector network *** process to extract scattering parameters from simulation models is explained in *** different simulation models of a 5 kV XLPE power cable have been *** chosen approach delivers an efficient tool to quickly estimate the quality of a model.

关键词： transients cable power system scattering parameters modeling simulation

Hardware-in-the-loop simulation technology of wide-band radar targets based on scattering center model

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Chinese Journal of Aeronautics 2015年第5期28卷 1476-1484页

作者： Huang Hao Pan Minghai Lu Zhijun Key Laboratory of Radar Imaging and Microwave Photonics Ministry of Education Nanjing University of Aeronautics and Astronautics Shanghai Key Laboratory of Space Intelligent Control Technology

Hardware-in-the-loop （HWIL） simulation technology can verify and evaluate the radar by simulating the radio frequency environment in an anechoic chamber. The HWIL simulation technology of wide-band radar targets can accurately generate wide-band radar target echo which stands for the radar target scattering characteristics and pulse modulation of radar transmitting signal. This paper analyzes the wide-band radar target scattering properties first. Since the responses of target are composed of many separate scattering centers, the target scattering characteristic is restructured by scattering centers model. Based on the scattering centers model of wide-band radar target, the wide-band radar target echo modeling and the simulation method are discussed. The wide-band radar target echo is reconstructed in real-time by convoluting the transmitting signal to the target scattering parameters. Using the digital radio frequency memory （DRFM） system, the HWIL simulation of wide-band radar target echo with high accuracy can be actualized. A typical wide-band radar target simulation is taken to demonstrate the preferable simulation effect of the reconstruction method of wide-band radar target echo. Finally, the radar target time-domain echo and high-resolution range profile （HRRP） are given. The results show that the HWIL simulation gives a high-resolution range distribution of wide-band radar target scattering centers.

关键词： Digital radio frequencymemory Error analysis Hardware-in-the-loop simu-lation Radar targets scattering parameters

scattering of on-axis polarized Gaussian light beam by spheroidal water coating aerosol particle

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Chinese Optics Letters 2014年第1期12卷 69-72页

作者：孙贤明王海华 School of Electrical and electronics engineering Shandong University of Technology

Small particle light scattering can produce light with polarization characteristics different from those of the incident beam. An analytical solution to the scattering by a spheroid with inclusion for an on-axis polarized Gaussian beam incidence is provided within the generalized Lorenz-Mie theory framework. The shapes of the inclusion can be spherical, confocal spheroid, or non-confocal spheroid. The Muller scattering matrix elements are computed for plane wave incidence or Gaussian light beam incidence. The effect of the size and shape of the inclusion or the coating on the polarized Oaussian light scattering characteristics by a spheroidal water coating aerosol Darticle are commlted and a,nalvzed.

关键词： Aerosols Coatings Light scattering scattering scattering parameters

Probe method to measure the electromagnetic field in a plasma by Poynting vector conversion

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Plasma Science and Technology 2021年第12期23卷 74-82页

作者：田丽山包为民刘彦明孙超赵成伟 School of Aerospace Science and Technology Xidian UniversityXi'an 710126People's Republic of China Plasma Electromagnetic Physics Laboratory(PEPL)in Extreme Environment the Key Laboratory of the Ministry of Education of ChinaXi'an 710126People's Republic of China

In this paper,a high-precision electromagnetic measurement system suitable for a hightemperature and high-speed plasma is built to provide a platform for scientific research on the interaction mechanism of the electromagnetic fields and a *** paper presents a method to measure the electromagnetic field inside a plasma by using a probe and Poynting vector conversion,which is a new and completely different method from the traditional method of measuring the electromagnetic field inside *** addition,for this system and method,this work designs a microstrip antenna probe that can suppress multipath *** method is confirmed to be valid and usable after closed-loop verification by the CST software.

关键词： electromagnetic measurement system scattering parameters Poynting vector microstrip antenna probe

Comparison of on-wafer calibrations for THz In P-based PHEMTs applications

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Journal of Semiconductors 2015年第6期36卷 64-67页

作者：王志明黄辉胡志富赵卓彬王旭东罗晓斌刘军杨宋源吕昕 Beijing Key Laboratory of Millimeter Wave and Terahertz Technology Beijing Institute of Technology National Institute of Metrology Hebei Semiconductor Research Institute

A quantitative comparison of multiline TRL （thru-reflect-line） and LRM （line-reflect-match） on-wafer calibrations for scattering parameters （S-parameters） measurement of InP-based PHEMTs is presented. The com- parison is undertaken for the first time and covers a frequency range from 70 kHz to 110 GHz. It is demonstrated that the accuracy of multiline TRL and LRM calibration is in good agreement. Both methods outperform the conven- tional SOLT calibration in the full frequency band up to 110 GHz. Then the excellent RF performance is obtained by extrapolation on the basis of inflection point, including a maximum current gain cut-off frequency ft of 247 GHz and a maximum oscillation frequency fmax of 392 GHz. The small-signal model based on LRM calibration is es- tablished as well. The S-parameters of the model are consistent with the measured from 1 to 110 GHz.

关键词： on-wafer calibration scattering parameters PHEMTs small-signal model

Optical Negative-Index Metamaterial Using CSRR by Incidenting the Light Horizontally at Near-Infrared Domain

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Journal of Electromagnetic Analysis and Applications 2016年第3期8卷 56-61页

作者： Ammar Armghan Xinguang Hu Shuai Yuan Jinsong Xia Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan China

Metamaterial structure based on cascaded split ring resonators (CSRR) is proposed in order to produce a negative refractive index in terahertz regime at near-infrared range. We have incident light horizontally instead of incidenting it perpendicular. We have measured the negative refractive index, permeability and permittivity by using the S-parameter analysis. Furthermore, it is found out that negative refractive index, permeability and permittivity are dependent upon the width of the wire and the gap between resonators at near-infrared range. This work will be helpful for the fabrication and design of double negative metamaterials structure having negative permeability, permittivity and negative refractive index for in plane applications.

关键词： Metamaterials Negative Refractive Index Left Handed Material scattering parameters

Small-signal and large-signal performance test of high-speed optoelectronics devices

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Small-signal and large-signal performance test of high-speed...

Reconfigurable Dual Frequency Microstrip MIMO Patch Antenna Using RF MEMS Switches for WLAN Application

Asia-pacific Optical Communications 2004

作者： N. H. Zhu C. Chen J. W. Sun E. Y. B. Pun and P. S. Chung N. H. Zhu C Chen and J. W. Sun are with the State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors CAS P. O. Box 912 Beijing 100083 P.R. China E. Y. B. Pun and P. S. Chung are with the Department of Electronic Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong.

This paper presents measurement methods for determining the reflection coefficients and frequency responses of semiconductor laser diodes, photodiodes, and EA modulator chips. A novel method for deter

关键词： scattering parameters measurement test fixture intrinsic response laser diode parasitic network.

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Reconfigurable Dual Frequency Microstrip MIMO Patch Antenna ...