Pub Date : 2022-12-09DOI: 10.1109/ACES-China56081.2022.10065048
Anpeng Song, Chen Xu, Jun Yu Li, Kai Jin, K. Wei
Inverse synthetic aperture LADAR(ISAL) is a coherent imaging technology whose resolution is independent of the target distance. Compared with traditional linear frequency modulation scheme, phase-coded ISAL can refer to the methods in communication to reduce noise interference or compensate the carrier phase error. In this paper, a novel single sideband modulation based phased coded continuous-wave ISAL system is proposed and experimentally demonstrated. The spectral efficiency of the new system is twice that of the traditional system, resulting in twice the utilization of echo energy. In addition, the use of continuous wave modulation improves anti-noise capability and imaging quality. Imaging results with azimuth resolution of 1.51cm are obtained by two 4cm aperture diameter telescopes at the distance of 7km, achieved about twenty times higher than conventional real aperture imaging system.
{"title":"Single Sideband Modulation Based Phase-coded Continuous Wave Inverse Synthetic Aperture Ladar Demonstration and Outdoor Experiment","authors":"Anpeng Song, Chen Xu, Jun Yu Li, Kai Jin, K. Wei","doi":"10.1109/ACES-China56081.2022.10065048","DOIUrl":"https://doi.org/10.1109/ACES-China56081.2022.10065048","url":null,"abstract":"Inverse synthetic aperture LADAR(ISAL) is a coherent imaging technology whose resolution is independent of the target distance. Compared with traditional linear frequency modulation scheme, phase-coded ISAL can refer to the methods in communication to reduce noise interference or compensate the carrier phase error. In this paper, a novel single sideband modulation based phased coded continuous-wave ISAL system is proposed and experimentally demonstrated. The spectral efficiency of the new system is twice that of the traditional system, resulting in twice the utilization of echo energy. In addition, the use of continuous wave modulation improves anti-noise capability and imaging quality. Imaging results with azimuth resolution of 1.51cm are obtained by two 4cm aperture diameter telescopes at the distance of 7km, achieved about twenty times higher than conventional real aperture imaging system.","PeriodicalId":293734,"journal":{"name":"2022 International Applied Computational Electromagnetics Society Symposium (ACES-China)","volume":"267 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115308201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/ACES-China56081.2022.10064789
Wenlei Wang, Gang Zhang, MingYue Pan, Xinyu Yang, Chenyang Yuan, Zhengyu Sun
This paper presents a new design concept of coaxial sleeve bandpass filter (BPF), which is based on two different resonators. The first resonator is a dual-mode coaxial cavity achieved by adding a sleeve to a conventional coaxial metal post, while the second one is a single-mode resonator. By cascading them together, the fundamental modes of two cavities are used to form a passband. This special configuration and port position can introduce two transmission zeros above the passband, which leads to high selectivity. To verify the design concept, a BPF operating at 2.06GHz with the bandwidth of 160MHz is designed and simulated.
{"title":"Design of 3D Printed Coaxial Sleeve Bandpass Filter","authors":"Wenlei Wang, Gang Zhang, MingYue Pan, Xinyu Yang, Chenyang Yuan, Zhengyu Sun","doi":"10.1109/ACES-China56081.2022.10064789","DOIUrl":"https://doi.org/10.1109/ACES-China56081.2022.10064789","url":null,"abstract":"This paper presents a new design concept of coaxial sleeve bandpass filter (BPF), which is based on two different resonators. The first resonator is a dual-mode coaxial cavity achieved by adding a sleeve to a conventional coaxial metal post, while the second one is a single-mode resonator. By cascading them together, the fundamental modes of two cavities are used to form a passband. This special configuration and port position can introduce two transmission zeros above the passband, which leads to high selectivity. To verify the design concept, a BPF operating at 2.06GHz with the bandwidth of 160MHz is designed and simulated.","PeriodicalId":293734,"journal":{"name":"2022 International Applied Computational Electromagnetics Society Symposium (ACES-China)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115465993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/ACES-China56081.2022.10065213
Weijun Wu, Junbo Chao, H. Zhang, Xiangmei Zeng, Jianpu Qiao
In this paper, a ±45° dual-polarized antenna is proposed, which mainly consists of a main radiator, a parasitic patch, a feed network and a box-type reflector plate. The miniaturization of the antenna is achieved by adding a dielectric between the main radiator and the reflector plate, and the size of the main radiator is $0.257lambda_{0}times 0.257lambda_{0}$. The simulation results show that the antenna has the −14dB bandwidth of 2.42GHz~2.74GHz, the gain of 7.8dBi~8.3dBi, the half-power beamwidth of 67.2°~3.5°, the axial cross-polarization ratio greater than 33dB, and the ~60° cross-polarization ratio greater than 10dB.
{"title":"A Miniaturized Dual-Polarized Patch Antenna With Low Cross Polarization","authors":"Weijun Wu, Junbo Chao, H. Zhang, Xiangmei Zeng, Jianpu Qiao","doi":"10.1109/ACES-China56081.2022.10065213","DOIUrl":"https://doi.org/10.1109/ACES-China56081.2022.10065213","url":null,"abstract":"In this paper, a ±45° dual-polarized antenna is proposed, which mainly consists of a main radiator, a parasitic patch, a feed network and a box-type reflector plate. The miniaturization of the antenna is achieved by adding a dielectric between the main radiator and the reflector plate, and the size of the main radiator is $0.257lambda_{0}times 0.257lambda_{0}$. The simulation results show that the antenna has the −14dB bandwidth of 2.42GHz~2.74GHz, the gain of 7.8dBi~8.3dBi, the half-power beamwidth of 67.2°~3.5°, the axial cross-polarization ratio greater than 33dB, and the ~60° cross-polarization ratio greater than 10dB.","PeriodicalId":293734,"journal":{"name":"2022 International Applied Computational Electromagnetics Society Symposium (ACES-China)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125243065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/ACES-China56081.2022.10065267
Yi Qi, Ming Huang, Chao Sun, Chen Chen, Feng Yang
Ultra-wideband low-profile antenna loaded with matching circuit is presented in this paper, which is buried in a specific cavity. The proposed antenna is fed through coaxial directly to achieve a low-profile characteristic. The designed antenna is proposed to achieves a $4:1$ bandwidth $(f_{L^{-}}-f_{L})$ with VSWR <3, while the antenna without loaded with matching circuit only reaches a $2.5:1$ bandwidth $(1.6f_{L}-4f_{L})$. The maximum size is only about $0.17lambda_{lll}$, and the profile height is only $0.055lambda_{lll}$, which makes the antenna suitable for the application of airborne platforms. The special cavity’s maximum length is $0.33lambda_{1lw}$, the profile height is the same as the antenna, and the angle of inclination is 15°.
{"title":"Ultra-wideband Low-profile Antenna Loaded With Matching Circuit","authors":"Yi Qi, Ming Huang, Chao Sun, Chen Chen, Feng Yang","doi":"10.1109/ACES-China56081.2022.10065267","DOIUrl":"https://doi.org/10.1109/ACES-China56081.2022.10065267","url":null,"abstract":"Ultra-wideband low-profile antenna loaded with matching circuit is presented in this paper, which is buried in a specific cavity. The proposed antenna is fed through coaxial directly to achieve a low-profile characteristic. The designed antenna is proposed to achieves a $4:1$ bandwidth $(f_{L^{-}}-f_{L})$ with VSWR <3, while the antenna without loaded with matching circuit only reaches a $2.5:1$ bandwidth $(1.6f_{L}-4f_{L})$. The maximum size is only about $0.17lambda_{lll}$, and the profile height is only $0.055lambda_{lll}$, which makes the antenna suitable for the application of airborne platforms. The special cavity’s maximum length is $0.33lambda_{1lw}$, the profile height is the same as the antenna, and the angle of inclination is 15°.","PeriodicalId":293734,"journal":{"name":"2022 International Applied Computational Electromagnetics Society Symposium (ACES-China)","volume":"21 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116685760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/ACES-China56081.2022.10064938
Xiao Jingrui, Ding Yanli, Zhang Xin, Qi Pengfei, Liu Liang
At present, almost all the impermeable layers of landfills have leakage problems. Accurate detection of leakage points and monitoring of pollution plumes are of great significance to landfill pollution treatment and restoration. In this study, in-situ resistivity detection was used at the bottom of the landfill site, and Visual MODFLOW was used to establish a solute transport model of the landfill site. The results show that the specific location of the leakage point can be well detected by comparing resistivity anomalies before and after the leakage, and the groundwater model can be verified by converting resistivity data into concentration data. It verifies the feasibility of in-situ resistivity detection and realizes the prediction of pollution plume migration path, which can provide certain technical support for landfill leakage treatment and repair.
{"title":"Landfill leakage detection method based on resistivity anomaly","authors":"Xiao Jingrui, Ding Yanli, Zhang Xin, Qi Pengfei, Liu Liang","doi":"10.1109/ACES-China56081.2022.10064938","DOIUrl":"https://doi.org/10.1109/ACES-China56081.2022.10064938","url":null,"abstract":"At present, almost all the impermeable layers of landfills have leakage problems. Accurate detection of leakage points and monitoring of pollution plumes are of great significance to landfill pollution treatment and restoration. In this study, in-situ resistivity detection was used at the bottom of the landfill site, and Visual MODFLOW was used to establish a solute transport model of the landfill site. The results show that the specific location of the leakage point can be well detected by comparing resistivity anomalies before and after the leakage, and the groundwater model can be verified by converting resistivity data into concentration data. It verifies the feasibility of in-situ resistivity detection and realizes the prediction of pollution plume migration path, which can provide certain technical support for landfill leakage treatment and repair.","PeriodicalId":293734,"journal":{"name":"2022 International Applied Computational Electromagnetics Society Symposium (ACES-China)","volume":"9 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116774228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/ACES-China56081.2022.10064742
Lin Gan, Zehao Wu, Jianbing Li
In order to realize good omnidirectional backtracking of electromagnetic waves, a Van Atta cube scatterer consists of six identical Van Atta plane arrays is proposed. In this paper, the scattering characteristics in different incident directions are emphatically studied. Simulation results show that the Van Atta cube scatterer has the advantage of omnidirectional scattering, with the effective backtracking angle range exceeding 77% of the whole angle domain.
{"title":"Research on the Scattering Characteristics of the Van Atta Cube Scatterer","authors":"Lin Gan, Zehao Wu, Jianbing Li","doi":"10.1109/ACES-China56081.2022.10064742","DOIUrl":"https://doi.org/10.1109/ACES-China56081.2022.10064742","url":null,"abstract":"In order to realize good omnidirectional backtracking of electromagnetic waves, a Van Atta cube scatterer consists of six identical Van Atta plane arrays is proposed. In this paper, the scattering characteristics in different incident directions are emphatically studied. Simulation results show that the Van Atta cube scatterer has the advantage of omnidirectional scattering, with the effective backtracking angle range exceeding 77% of the whole angle domain.","PeriodicalId":293734,"journal":{"name":"2022 International Applied Computational Electromagnetics Society Symposium (ACES-China)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116963498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/ACES-China56081.2022.10065130
Jiaqi Liu, Lu Gao, R. Wu, Xia Ai, Song Chai, Xin Liu, Shengjun Zhang, Yichun Cui
In the near-field test environment of 01500×3300mm vacuum vessel with low electromagnetic scattering, the relative measurement method is used, that is, the results of electrically large-scale plasma radar cross section (RCS) are extrapolated by measuring the ratio of standard volume echo energy to plasma echo energy.
{"title":"Near-field Measurement Method for Electromagnetic Scattering of Electrically Large-scale Plasma","authors":"Jiaqi Liu, Lu Gao, R. Wu, Xia Ai, Song Chai, Xin Liu, Shengjun Zhang, Yichun Cui","doi":"10.1109/ACES-China56081.2022.10065130","DOIUrl":"https://doi.org/10.1109/ACES-China56081.2022.10065130","url":null,"abstract":"In the near-field test environment of 01500×3300mm vacuum vessel with low electromagnetic scattering, the relative measurement method is used, that is, the results of electrically large-scale plasma radar cross section (RCS) are extrapolated by measuring the ratio of standard volume echo energy to plasma echo energy.","PeriodicalId":293734,"journal":{"name":"2022 International Applied Computational Electromagnetics Society Symposium (ACES-China)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117169720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A Verilog-A compact model for electro-thermal co-simulation of one diode-one resistor (1D1R) resistive random access memory (RRAM) is developed. The compact model contains two parts. One part is the electrical circuit model for the RRAM and the diode with temperature-dependent parameters; the other part is the equivalent thermal circuit model with thermal resistance and thermal capacitance calculated from the geometry and material parameters of 1D1R cell. The electro-thermal compact model can capture both the IV characteristics and temperature distribution of the memory cell. The simulation results reveal that the rising temperature of conductive filament in RRAM is much higher than that of the diode during the reset process of the memory cell. The validity of our compact model is verified by comparing it with other’s experiment data.
{"title":"A Compact Model for Electro-Thermal Co-Simulation of One Diode-One Resistor Random Access Resistive Memory","authors":"Xingyu Zhai, Wen-Yan Yin, Yanbin Yang, Wenchao Chen","doi":"10.1109/ACES-China56081.2022.10064737","DOIUrl":"https://doi.org/10.1109/ACES-China56081.2022.10064737","url":null,"abstract":"A Verilog-A compact model for electro-thermal co-simulation of one diode-one resistor (1D1R) resistive random access memory (RRAM) is developed. The compact model contains two parts. One part is the electrical circuit model for the RRAM and the diode with temperature-dependent parameters; the other part is the equivalent thermal circuit model with thermal resistance and thermal capacitance calculated from the geometry and material parameters of 1D1R cell. The electro-thermal compact model can capture both the IV characteristics and temperature distribution of the memory cell. The simulation results reveal that the rising temperature of conductive filament in RRAM is much higher than that of the diode during the reset process of the memory cell. The validity of our compact model is verified by comparing it with other’s experiment data.","PeriodicalId":293734,"journal":{"name":"2022 International Applied Computational Electromagnetics Society Symposium (ACES-China)","volume":"44 47","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120811342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/ACES-China56081.2022.10064935
Dongmin Zhang, Song Fu, Longjian Zhou, Wensheng Qiao, Xiuqiong Huang
This paper presents a parabolic equation model for predicting short-wave (SW) propagation in the anisotropic ionosphere. In this model, the influences of the geomagnetic field are described by integrating a double-refractive index. As a result, the refraction, absorption, and anisotropy of ionosphere are fully considered. Numerical examples are presented, and the time-frequency characteristics, double-refraction phenomenon, and the non-reciprocity of the ionosphere are analyzed by using the presented model. The simulation results are beneficial to the designs of sky-wave communication links.
{"title":"Modeling of Short-Wave Propagation in the Anisotropic Ionosphere using Parabolic Equation","authors":"Dongmin Zhang, Song Fu, Longjian Zhou, Wensheng Qiao, Xiuqiong Huang","doi":"10.1109/ACES-China56081.2022.10064935","DOIUrl":"https://doi.org/10.1109/ACES-China56081.2022.10064935","url":null,"abstract":"This paper presents a parabolic equation model for predicting short-wave (SW) propagation in the anisotropic ionosphere. In this model, the influences of the geomagnetic field are described by integrating a double-refractive index. As a result, the refraction, absorption, and anisotropy of ionosphere are fully considered. Numerical examples are presented, and the time-frequency characteristics, double-refraction phenomenon, and the non-reciprocity of the ionosphere are analyzed by using the presented model. The simulation results are beneficial to the designs of sky-wave communication links.","PeriodicalId":293734,"journal":{"name":"2022 International Applied Computational Electromagnetics Society Symposium (ACES-China)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127283468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/ACES-China56081.2022.10064751
Jianrong Geng, Hongxia Ye
Reverse time migration (RTM) technology has been widely used in seismic imaging measurement of complex structures because it is not affected by the changes of formation structure and lithology. This paper expanded it to the Ground penetrating radar (GPR) imaging of unknown subsurface detection scenes. The gprMax tool based on the finite difference time domain method (FDTD) is used to calculate the forward and backward extrapolation of the electromagnetic wave field, and the 2D and 3D RTM is realized based on the zero-time imaging condition of the explosion reflector principle. Multiple 2D and 3D simulation experiments show that the RTM algorithm can restore the characteristics of underground structures very accurately, even if the underground structure is complex, such as multiple buried target or nonparallel layered structure.
{"title":"Revers Time Migration Method of Ground Penetrating Radar Based on gprMax","authors":"Jianrong Geng, Hongxia Ye","doi":"10.1109/ACES-China56081.2022.10064751","DOIUrl":"https://doi.org/10.1109/ACES-China56081.2022.10064751","url":null,"abstract":"Reverse time migration (RTM) technology has been widely used in seismic imaging measurement of complex structures because it is not affected by the changes of formation structure and lithology. This paper expanded it to the Ground penetrating radar (GPR) imaging of unknown subsurface detection scenes. The gprMax tool based on the finite difference time domain method (FDTD) is used to calculate the forward and backward extrapolation of the electromagnetic wave field, and the 2D and 3D RTM is realized based on the zero-time imaging condition of the explosion reflector principle. Multiple 2D and 3D simulation experiments show that the RTM algorithm can restore the characteristics of underground structures very accurately, even if the underground structure is complex, such as multiple buried target or nonparallel layered structure.","PeriodicalId":293734,"journal":{"name":"2022 International Applied Computational Electromagnetics Society Symposium (ACES-China)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127486955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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