Pub Date : 2020-01-01DOI: 10.11972/J.ISSN.1001-9014.2020.03.017
Zheng Hai-tao, Liao Shiyong, D. James, Sun Houjun, Liu Xiaoguang
Processing ground penetrating radar data to obtain well-focused images for object detection has been an active research area. Phase-shift migration(PSM)is a widely used method since it allows the wave velocity to vary with respect to multi-layer medium. However,this requires pixel-by-pixel calculation of the image,which is time-consuming. This paper presents an extended Omega-k algorithm for multi-layer medium imaging with signif⁃ icantly less computation complexity than the PSM algorithm. The extended Omega-k exploits fast interpolation in the wave-number domain instead of iterative calculating as done by PSM. The method of estimating the wave propagation velocity in different media is also proposed via vertex region extraction for phase compensation and image focusing. Various images of buried targets of a two-layer medium experiment are obtained,which validate the effectiveness of the proposed algorithm,and make it practical for some typical ground-based surveillance ap⁃ plications.
{"title":"Extended Omega-k algorithm for synthetic aperture radar imaging in multi-layer medium","authors":"Zheng Hai-tao, Liao Shiyong, D. James, Sun Houjun, Liu Xiaoguang","doi":"10.11972/J.ISSN.1001-9014.2020.03.017","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.03.017","url":null,"abstract":"Processing ground penetrating radar data to obtain well-focused images for object detection has been an active research area. Phase-shift migration(PSM)is a widely used method since it allows the wave velocity to vary with respect to multi-layer medium. However,this requires pixel-by-pixel calculation of the image,which is time-consuming. This paper presents an extended Omega-k algorithm for multi-layer medium imaging with signif⁃ icantly less computation complexity than the PSM algorithm. The extended Omega-k exploits fast interpolation in the wave-number domain instead of iterative calculating as done by PSM. The method of estimating the wave propagation velocity in different media is also proposed via vertex region extraction for phase compensation and image focusing. Various images of buried targets of a two-layer medium experiment are obtained,which validate the effectiveness of the proposed algorithm,and make it practical for some typical ground-based surveillance ap⁃ plications.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"39 1","pages":"381"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.11972/J.ISSN.1001-9014.2020.06.001
Yuan Ye, Sun Xiang-bin, Yang Chengao, Zhang Yi, Shang Jin-Ming, Xie Sheng-Wen, Zhang Yu, Ni Hai-Qiao, Xu Yingqiang, Niu Zhi-chuan
YUAN Ye1,2, SU Xiang-Bin1,2, YANG Cheng-ao1,2, ZHANG Yi1,2, SHANG Jin-Ming1,2, XIE Sheng-Wen1,2, ZHANG Yu1,2*, NI Hai-Qiao1,2, XU Ying-Qiang1,2, NIU Zhi-Chuan1,2,3,4 (1. State Key Laboratory for Superlattices and Microstructures,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China; 2. Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China; 3. Beijing Academy of Quantum Information Sciences,Beijing 100193,China; 4. Laboratory of Solid Quantum Material Center,College of Physics and Electronic Engineering,Shanxi University, Taiyuan 030006,China)
{"title":"Molecular beam epitaxial growth of InAs quantum dots on GaAs for high characteristics temperature lasers","authors":"Yuan Ye, Sun Xiang-bin, Yang Chengao, Zhang Yi, Shang Jin-Ming, Xie Sheng-Wen, Zhang Yu, Ni Hai-Qiao, Xu Yingqiang, Niu Zhi-chuan","doi":"10.11972/J.ISSN.1001-9014.2020.06.001","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.06.001","url":null,"abstract":"YUAN Ye1,2, SU Xiang-Bin1,2, YANG Cheng-ao1,2, ZHANG Yi1,2, SHANG Jin-Ming1,2, XIE Sheng-Wen1,2, ZHANG Yu1,2*, NI Hai-Qiao1,2, XU Ying-Qiang1,2, NIU Zhi-Chuan1,2,3,4 (1. State Key Laboratory for Superlattices and Microstructures,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China; 2. Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China; 3. Beijing Academy of Quantum Information Sciences,Beijing 100193,China; 4. Laboratory of Solid Quantum Material Center,College of Physics and Electronic Engineering,Shanxi University, Taiyuan 030006,China)","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"39 1","pages":"667"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.11972/J.ISSN.1001-9014.2020.05.006
Bian Hui-Qi, Du Chao-Hai, P. Shi, Liu Pu-kun
A terahertz quasi-optical mode converter with wide bandwidth was studied and designed. The quasi-optical mode converter used Denisov launcher,which had high efficiency,and worked in TE6,2 mode. It was used to realize mode conversion in gyrotron. As the parameters of Denisov launcher were the main factors affecting the broadband performance of quasi-optical mode converter,the opti‐ mal design of the radiator parameters could increase the bandwidth of the mode converter. Using the self-developed quasi-optical simulation program for simulation,the bandwidth of the mode converter can reach 2 GHz(center frequency 94 GHz).
{"title":"Design and analysis of a broadband quasi-optical mode converter with a Denisov launcher","authors":"Bian Hui-Qi, Du Chao-Hai, P. Shi, Liu Pu-kun","doi":"10.11972/J.ISSN.1001-9014.2020.05.006","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.05.006","url":null,"abstract":"A terahertz quasi-optical mode converter with wide bandwidth was studied and designed. The quasi-optical mode converter used Denisov launcher,which had high efficiency,and worked in TE6,2 mode. It was used to realize mode conversion in gyrotron. As the parameters of Denisov launcher were the main factors affecting the broadband performance of quasi-optical mode converter,the opti‐ mal design of the radiator parameters could increase the bandwidth of the mode converter. Using the self-developed quasi-optical simulation program for simulation,the bandwidth of the mode converter can reach 2 GHz(center frequency 94 GHz).","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"39 1","pages":"567"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.11972/J.ISSN.1001-9014.2020.02.011
Yin Jia-Qi, Wang Shi-yong, Zhang Rui, Liu Fan-ming
{"title":"Calibration and non-uniformity correction of near-infrared polarization detector","authors":"Yin Jia-Qi, Wang Shi-yong, Zhang Rui, Liu Fan-ming","doi":"10.11972/J.ISSN.1001-9014.2020.02.011","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.02.011","url":null,"abstract":"","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"39 1","pages":"235"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.11972/J.ISSN.1001-9014.2020.05.003
Zhang Chen, Wang Wei, Song Tao, Huang Jie, Cao Yi-chao, Liu Di-wei, Hu Min, Zhang Kai-chun, Wu Zhen-Hua, Zhong Renbin, Zhao Tao, G. Seng, L. Shenggang
The electromagnetic characteristics of the double confocal waveguide for a gyro-TWT is investigated in details. The eigenvalue and the field distribution of two kinds of steady-state modes in a double confocal wave⁃ guide,namely the superposition mode and the ring mode,are calculated with the scalar formulation of Huygens’ Principle,the theoretical results agree well with those from the commercial CST software. When the anti-phase superposition mode TE06 mode is chosen as an operating mode in a gyro-TWT,the diffractive loss of the potential parasitic modes is far greater than that of the operating mode. It means that the potential parasitic modes can be suppressed by means of its own diffractive loss in a double confocal waveguide. The mode density in a double confocal waveguide is higher than that in a single confocal waveguide,but far lower than that in a cylindrical waveguide. Compared to the single confocal waveguide,a higher beam-wave interaction efficiency can be ob⁃ tained in the double confocal waveguide for a gyro-TWT,it is an appropriate choice to choose a double confocal waveguide as the beam-wave interaction structure in a gyro-TWT.
{"title":"Detailed investigations on double confocal waveguide for a gyro-TWT","authors":"Zhang Chen, Wang Wei, Song Tao, Huang Jie, Cao Yi-chao, Liu Di-wei, Hu Min, Zhang Kai-chun, Wu Zhen-Hua, Zhong Renbin, Zhao Tao, G. Seng, L. Shenggang","doi":"10.11972/J.ISSN.1001-9014.2020.05.003","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.05.003","url":null,"abstract":"The electromagnetic characteristics of the double confocal waveguide for a gyro-TWT is investigated in details. The eigenvalue and the field distribution of two kinds of steady-state modes in a double confocal wave⁃ guide,namely the superposition mode and the ring mode,are calculated with the scalar formulation of Huygens’ Principle,the theoretical results agree well with those from the commercial CST software. When the anti-phase superposition mode TE06 mode is chosen as an operating mode in a gyro-TWT,the diffractive loss of the potential parasitic modes is far greater than that of the operating mode. It means that the potential parasitic modes can be suppressed by means of its own diffractive loss in a double confocal waveguide. The mode density in a double confocal waveguide is higher than that in a single confocal waveguide,but far lower than that in a cylindrical waveguide. Compared to the single confocal waveguide,a higher beam-wave interaction efficiency can be ob⁃ tained in the double confocal waveguide for a gyro-TWT,it is an appropriate choice to choose a double confocal waveguide as the beam-wave interaction structure in a gyro-TWT.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"39 1","pages":"547"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.11972/J.ISSN.1001-9014.2020.01.012
Song Shao-jing, Chen Yu-Wei, Huang Hai-jiang, Hu Jin-yan, Gong Yu-Mei, Shao Hui
In the autonomous driving system of automobile,in order to improve the performance of sin‐ gle-wavelength LIDAR in physical property detection classification and state,and draw lessons from the principle that multi-spectral detection has physical property detection ability,this paper studies the band selection of multi-spectral LIDAR,calculates and analyses the spectrum of typical targets in au‐ tonomous driving by using principal component analysis method. The characteristics of laser source and detector,the band selection method of multi-spectral LIDAR,the spectral characteristic analysis of typical targets for autonomous driving application scenarios and the availability of commercial LI‐ DAR are synthesized. The central wavelength of the multi-spectral LIDAR suitable for autonomous driving of automobiles is 808 nm,905 nm,1 064 nm and 1 310 nm. The validity of the selected wave‐ length of the multi-spectral LIDAR is verified by testing. 文章编号:1001-9014(2020)01-0086-06 DOI:10. 11972/j. issn. 1001-9014. 2020. 01. 012 收稿日期:2019⁃ 08⁃ 22,修回日期:2019-11-21 Received date:2019⁃ 08⁃ 22,Revised date:2019-11-21 基金项目:上海第二工业大学校重点学科建设项目(XXKZD1605);校企合作汽车电子联合实验中心建设项目资助(A11NH190704) Foundation items:Supported by Discipline Construction Project of Shanghai Polytechnic University(XXKZD1605),and Construction Project of Uni⁃ versity Enterprise Joint Automobile Electronic Experiment Center(A11NH190704). 作者简介(Biography):宋绍京(1974-),男,山东泰安人,副教授,主要从事图像处理与分析、实时信号与信息处理、智能驾驶等方面研究,Email:sjsong@sspu. edu. cn *通讯作者(Corresponding author):E-mail:sjsong@sspu. edu. cn 1期 宋绍京 等:适用汽车智能驾驶的多光谱激光雷达波长选择可行性研究
{"title":"The feasibility study of wavelength selection of multi-spectral LIDAR for autonomous driving","authors":"Song Shao-jing, Chen Yu-Wei, Huang Hai-jiang, Hu Jin-yan, Gong Yu-Mei, Shao Hui","doi":"10.11972/J.ISSN.1001-9014.2020.01.012","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.01.012","url":null,"abstract":"In the autonomous driving system of automobile,in order to improve the performance of sin‐ gle-wavelength LIDAR in physical property detection classification and state,and draw lessons from the principle that multi-spectral detection has physical property detection ability,this paper studies the band selection of multi-spectral LIDAR,calculates and analyses the spectrum of typical targets in au‐ tonomous driving by using principal component analysis method. The characteristics of laser source and detector,the band selection method of multi-spectral LIDAR,the spectral characteristic analysis of typical targets for autonomous driving application scenarios and the availability of commercial LI‐ DAR are synthesized. The central wavelength of the multi-spectral LIDAR suitable for autonomous driving of automobiles is 808 nm,905 nm,1 064 nm and 1 310 nm. The validity of the selected wave‐ length of the multi-spectral LIDAR is verified by testing. 文章编号:1001-9014(2020)01-0086-06 DOI:10. 11972/j. issn. 1001-9014. 2020. 01. 012 收稿日期:2019⁃ 08⁃ 22,修回日期:2019-11-21 Received date:2019⁃ 08⁃ 22,Revised date:2019-11-21 基金项目:上海第二工业大学校重点学科建设项目(XXKZD1605);校企合作汽车电子联合实验中心建设项目资助(A11NH190704) Foundation items:Supported by Discipline Construction Project of Shanghai Polytechnic University(XXKZD1605),and Construction Project of Uni⁃ versity Enterprise Joint Automobile Electronic Experiment Center(A11NH190704). 作者简介(Biography):宋绍京(1974-),男,山东泰安人,副教授,主要从事图像处理与分析、实时信号与信息处理、智能驾驶等方面研究,Email:sjsong@sspu. edu. cn *通讯作者(Corresponding author):E-mail:sjsong@sspu. edu. cn 1期 宋绍京 等:适用汽车智能驾驶的多光谱激光雷达波长选择可行性研究","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"10 1","pages":"86"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.11972/J.ISSN.1001-9014.2019.03.020
Tan Zhonghui, Shuo Ma, Ding Han, Ding Gao, Wei Yan
{"title":"Estimation of cloud base height for FY-4A satellite based on random forest algorithm","authors":"Tan Zhonghui, Shuo Ma, Ding Han, Ding Gao, Wei Yan","doi":"10.11972/J.ISSN.1001-9014.2019.03.020","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2019.03.020","url":null,"abstract":"","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"38 1","pages":"030381"},"PeriodicalIF":0.7,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66393914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.11972/J.ISSN.1001-9014.2019.02.020
Ying Meng, Yuqiang Deng, Shuheng Guo, Qing Sun, Chaochen Li, Bo Fang, Jiu-Sun Zeng, Cai Jinhui
{"title":"Terahertz spatial radiant power density measurements based on terahertz frequency comb","authors":"Ying Meng, Yuqiang Deng, Shuheng Guo, Qing Sun, Chaochen Li, Bo Fang, Jiu-Sun Zeng, Cai Jinhui","doi":"10.11972/J.ISSN.1001-9014.2019.02.020","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2019.02.020","url":null,"abstract":"","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"38 1","pages":"02254"},"PeriodicalIF":0.7,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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