Pub Date : 2020-12-07DOI: 10.1109/NEMO49486.2020.9343498
Rui Xu, Z. Shen, Wong Loke Loong
A simple UHF RFID reader antenna is designed with four 1×2 Sub-arrays. Measured results show that an impedance bandwidth from 880 to 938 MHz is obtained, which can fully cover the UHF RFID working frequency (902 to 928 MHz). These four Sub-arrays could not only provide four strong E-field distributions around the near-zone region, but also have good far-field radiation patterns within the whole working band. This UHF RFID reader antenna can avoid the risk of tag dislocation in train tracking and positioning system.
{"title":"UHF RFID Reader Antenna with Four Sub-Arrays for Near-Field and Far-Field Operations","authors":"Rui Xu, Z. Shen, Wong Loke Loong","doi":"10.1109/NEMO49486.2020.9343498","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343498","url":null,"abstract":"A simple UHF RFID reader antenna is designed with four 1×2 Sub-arrays. Measured results show that an impedance bandwidth from 880 to 938 MHz is obtained, which can fully cover the UHF RFID working frequency (902 to 928 MHz). These four Sub-arrays could not only provide four strong E-field distributions around the near-zone region, but also have good far-field radiation patterns within the whole working band. This UHF RFID reader antenna can avoid the risk of tag dislocation in train tracking and positioning system.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116054956","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 : 2020-12-07DOI: 10.1109/NEMO49486.2020.9343412
Wei Wang, Jian Dong, Meng Wang, Jinjun Mo
This paper proposes a fast method for designing a frequency selective surface using a filter circuit. This method first uses the semi-empirical formula to design the rough structure of the frequency selective surface, and then optimizes the rough structure to meet the design requirements. This method is improved in accuracy and time compared to purely using empirical formulas or relying solely on algorithms, and it is relatively quick and simple when designing the frequency selection surface.
{"title":"Frequency Selective Surface Design Based on Equivalent Circuit","authors":"Wei Wang, Jian Dong, Meng Wang, Jinjun Mo","doi":"10.1109/NEMO49486.2020.9343412","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343412","url":null,"abstract":"This paper proposes a fast method for designing a frequency selective surface using a filter circuit. This method first uses the semi-empirical formula to design the rough structure of the frequency selective surface, and then optimizes the rough structure to meet the design requirements. This method is improved in accuracy and time compared to purely using empirical formulas or relying solely on algorithms, and it is relatively quick and simple when designing the frequency selection surface.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116086574","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 : 2020-12-07DOI: 10.1109/NEMO49486.2020.9343492
Ping Wu, C. Meng, Zhifei Xu, J. Fan
This paper develops an innovative model of shielded coaxial cable illuminated by high power electromagnetic pulse. This Kron-Branin model is a flexible and efficient way of wave-circuit hybrid calculation, which is based on Branin’s transmission line (TL) model and tensorial analysis of network (TAN). The traditional equivalent circuit is transferred into a topology graph consists of basic elements like nodes, branches, meshes, and cords. Electromagnetic and circuit equations can be derived and transferred according to the graph. The graph topology and equivalent transmission line equation of illuminated shielded cable structure is presented in this paper. A good correlation between the analytical calculation of the KB model and commercial simulation software is obtained.
{"title":"Kron-Branin Model of Braided Coaxial Cable Illuminated by Electromagnetic Wave","authors":"Ping Wu, C. Meng, Zhifei Xu, J. Fan","doi":"10.1109/NEMO49486.2020.9343492","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343492","url":null,"abstract":"This paper develops an innovative model of shielded coaxial cable illuminated by high power electromagnetic pulse. This Kron-Branin model is a flexible and efficient way of wave-circuit hybrid calculation, which is based on Branin’s transmission line (TL) model and tensorial analysis of network (TAN). The traditional equivalent circuit is transferred into a topology graph consists of basic elements like nodes, branches, meshes, and cords. Electromagnetic and circuit equations can be derived and transferred according to the graph. The graph topology and equivalent transmission line equation of illuminated shielded cable structure is presented in this paper. A good correlation between the analytical calculation of the KB model and commercial simulation software is obtained.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127529144","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 : 2020-12-07DOI: 10.1109/NEMO49486.2020.9343611
Xiang-hua Wang, Jian‐Yun Gao
A stability-improved hybrid implicit-explicit finite-difference time-domain method (HIE-FDTD) for magnetized graphene is proposed. The graphene is treated as a current source modeled by an auxiliary differential equation which is divided into two separate equations to describe isotropic and anisotropic properties. The one time-step iteration in the conventional algorithm is decomposed into two sub steps where the conventional HIE-FDTD combined with the isotropic equation is implemented first followed by the Crank-Nicolson (CN) scheme combined with the anisotropic equation to retain the stability. Numerical results show that, differently from other recent extensions, the stability condition of the proposed method preserves the same form as that of the conventional HIE-FDTD. We illustrate the application of the proposed algorithm to accurately compute graphene transmission properties e.g., Faraday and Kerr rotations.
{"title":"Stability-Improved HIE-FDTD for Magnetized Graphene from Microwave to THz Band","authors":"Xiang-hua Wang, Jian‐Yun Gao","doi":"10.1109/NEMO49486.2020.9343611","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343611","url":null,"abstract":"A stability-improved hybrid implicit-explicit finite-difference time-domain method (HIE-FDTD) for magnetized graphene is proposed. The graphene is treated as a current source modeled by an auxiliary differential equation which is divided into two separate equations to describe isotropic and anisotropic properties. The one time-step iteration in the conventional algorithm is decomposed into two sub steps where the conventional HIE-FDTD combined with the isotropic equation is implemented first followed by the Crank-Nicolson (CN) scheme combined with the anisotropic equation to retain the stability. Numerical results show that, differently from other recent extensions, the stability condition of the proposed method preserves the same form as that of the conventional HIE-FDTD. We illustrate the application of the proposed algorithm to accurately compute graphene transmission properties e.g., Faraday and Kerr rotations.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125486913","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 : 2020-12-07DOI: 10.1109/NEMO49486.2020.9343429
Pratik Ghosh, B. Chaudhury
The fluid-based simulation of high power millimeter(HPM) wave interaction with plasma is a computationally challenging problem. The complex phenomenon is a multi-physics and a multi-scale problem due to the involvement of coupled EM wave and plasma solvers with different space and time scales. The simulation requires a proper resolution in both space and time to accommodate the gradients in the fields as well as the plasma density, making it a computationally intensive problem. In this paper, we have implemented a mesh refinement based algorithm with selective refined grids in the desirable region with steep gradients in plasma density and electric(E) field. We have tested the algorithm on a test-bed problem, involving the formation of self-organized plasma filaments, for three different refinement factors (r_f = 2, 4, 8) and achieved a speedup of 4 − 100 compared to a serial implementation with uniform mesh without any refinement. We have investigated the dependence of speedup and accuracy on the refinement factor for different cases.
{"title":"Mesh Refinement Based Simulation of Complex Plasma Dynamics during High Power Millimeter Wave Breakdown","authors":"Pratik Ghosh, B. Chaudhury","doi":"10.1109/NEMO49486.2020.9343429","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343429","url":null,"abstract":"The fluid-based simulation of high power millimeter(HPM) wave interaction with plasma is a computationally challenging problem. The complex phenomenon is a multi-physics and a multi-scale problem due to the involvement of coupled EM wave and plasma solvers with different space and time scales. The simulation requires a proper resolution in both space and time to accommodate the gradients in the fields as well as the plasma density, making it a computationally intensive problem. In this paper, we have implemented a mesh refinement based algorithm with selective refined grids in the desirable region with steep gradients in plasma density and electric(E) field. We have tested the algorithm on a test-bed problem, involving the formation of self-organized plasma filaments, for three different refinement factors (r_f = 2, 4, 8) and achieved a speedup of 4 − 100 compared to a serial implementation with uniform mesh without any refinement. We have investigated the dependence of speedup and accuracy on the refinement factor for different cases.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125834643","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 : 2020-12-07DOI: 10.1109/NEMO49486.2020.9343590
Jiangchuan Lin, Zidong Chen, Xuejun Cao, G. Zhao
In order to systematically analysis the damage mechanism of typical radio fuze caused by narrow band high power microwave (NB-HPM), we developed an standard experiment system. Through several rounds fuze experiments form L band to X band, the threshold value, sensitive parameters and main energy coupled channel are defined. By full wave simulation and coupling testing at key points, the key sensitive components is identified. Finally, the damage mechanism is explained by the multiple physical field simulation. All the above work shows that unlike the ultra-band HPM, cannonball body is not the main coupling channel and the silicon controlled rectifier (SCR) would not miss-working by the voltage fluctuation of the commonality ground. Antenna is the main coupling path of typical radio fuze for narrow band HPM from L band to X band. Oscillation tube of RF circuit is the key vulnerable part. The main damage mechanism is heat accumulation in p-n junction and the main effects is miss-fire of fuze.
{"title":"Research on the damage mechanism of typical radio fuze induced by narrow band HPM","authors":"Jiangchuan Lin, Zidong Chen, Xuejun Cao, G. Zhao","doi":"10.1109/NEMO49486.2020.9343590","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343590","url":null,"abstract":"In order to systematically analysis the damage mechanism of typical radio fuze caused by narrow band high power microwave (NB-HPM), we developed an standard experiment system. Through several rounds fuze experiments form L band to X band, the threshold value, sensitive parameters and main energy coupled channel are defined. By full wave simulation and coupling testing at key points, the key sensitive components is identified. Finally, the damage mechanism is explained by the multiple physical field simulation. All the above work shows that unlike the ultra-band HPM, cannonball body is not the main coupling channel and the silicon controlled rectifier (SCR) would not miss-working by the voltage fluctuation of the commonality ground. Antenna is the main coupling path of typical radio fuze for narrow band HPM from L band to X band. Oscillation tube of RF circuit is the key vulnerable part. The main damage mechanism is heat accumulation in p-n junction and the main effects is miss-fire of fuze.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125101714","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 : 2020-12-07DOI: 10.1109/NEMO49486.2020.9343584
Fei Wang, Jialin Cai, Jun Liu, Jiangtao Su
In this paper, a novel model extraction method is proposed, which can extract behavioral model based on Bayesian inference accurately and efficiently. This method uses a simple active load-pull architecture, and only needs to change the amplitude and phase of the incident wave A2 at the load port in the process during the test, so that the training data can be acquired for the Bayesian algorithm, without the need for a complete loadpull test. Compared with the traditional scheme, this scheme can save the impedance iteration time and greatly improve the model extracting efficiency. The experiment results prove that the method has greatly increase the extracting speed without compromising the accuracy.
{"title":"A Novel Measurement Based Method Enabling Rapid Extraction of Bayesian Inference-Based Behavioral Model","authors":"Fei Wang, Jialin Cai, Jun Liu, Jiangtao Su","doi":"10.1109/NEMO49486.2020.9343584","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343584","url":null,"abstract":"In this paper, a novel model extraction method is proposed, which can extract behavioral model based on Bayesian inference accurately and efficiently. This method uses a simple active load-pull architecture, and only needs to change the amplitude and phase of the incident wave A2 at the load port in the process during the test, so that the training data can be acquired for the Bayesian algorithm, without the need for a complete loadpull test. Compared with the traditional scheme, this scheme can save the impedance iteration time and greatly improve the model extracting efficiency. The experiment results prove that the method has greatly increase the extracting speed without compromising the accuracy.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123607770","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 : 2020-12-07DOI: 10.1109/NEMO49486.2020.9343570
Linshen Xie, Wei Wu, Xiang-qin Zhu
The peak-value distribution of electric fields in testing area in " Spring-Thunder" bounded-wave electromagnetic pulse (EMP) simulator based on parallel finite-difference time-domain (FDTD) method on Message Passing Interface (MPI) platform is given. The experiment results are also presented. The field uniformity in "Spring-Thunder" bounded-wave EMP simulator is quantitatively analyzed. The mean value, standard deviation, and the field uniformity of the simulation and the experiment results are got. Both of the field uniformity agree well. It’s useful for the selection of the size and the location of the equipment under test (EUT) in the simulator in experiment.
{"title":"Quantitative Analysis of Field Uniformity in “Spring-Thunder” Bounded-Wave EMP Simulator","authors":"Linshen Xie, Wei Wu, Xiang-qin Zhu","doi":"10.1109/NEMO49486.2020.9343570","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343570","url":null,"abstract":"The peak-value distribution of electric fields in testing area in \" Spring-Thunder\" bounded-wave electromagnetic pulse (EMP) simulator based on parallel finite-difference time-domain (FDTD) method on Message Passing Interface (MPI) platform is given. The experiment results are also presented. The field uniformity in \"Spring-Thunder\" bounded-wave EMP simulator is quantitatively analyzed. The mean value, standard deviation, and the field uniformity of the simulation and the experiment results are got. Both of the field uniformity agree well. It’s useful for the selection of the size and the location of the equipment under test (EUT) in the simulator in experiment.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125037785","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 : 2020-12-07DOI: 10.1109/NEMO49486.2020.9343442
Yunqing Li, Fang He, O. Gassab, W. Yin
In this paper, a high-speed cable (25 Gb/s) with a longitudinal screen is modeled using HFSS software, which is based on the finite element method. The cable model is constructed directly in HFSS software, where the simulation is performed in the frequency domain up to 20 GHz. Consequently, the single-mode S-parameters of the cable are obtained and transformed into the mixed-mode S-parameters using MATLAB codes. Moreover, the simulated mixed-mode S-parameters are compared with the measurement data obtained by a network analyzer in order to examine the accuracy of the modeling strategy, where a very good agreement is obtained. This HFSS modeling can help us to understand the operation of the cable and its mode conversions before the actual fabrication of the cable.
{"title":"High-Speed Transmission Cable Performance- Simulations and Measurements","authors":"Yunqing Li, Fang He, O. Gassab, W. Yin","doi":"10.1109/NEMO49486.2020.9343442","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343442","url":null,"abstract":"In this paper, a high-speed cable (25 Gb/s) with a longitudinal screen is modeled using HFSS software, which is based on the finite element method. The cable model is constructed directly in HFSS software, where the simulation is performed in the frequency domain up to 20 GHz. Consequently, the single-mode S-parameters of the cable are obtained and transformed into the mixed-mode S-parameters using MATLAB codes. Moreover, the simulated mixed-mode S-parameters are compared with the measurement data obtained by a network analyzer in order to examine the accuracy of the modeling strategy, where a very good agreement is obtained. This HFSS modeling can help us to understand the operation of the cable and its mode conversions before the actual fabrication of the cable.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123791820","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 : 2020-12-07DOI: 10.1109/NEMO49486.2020.9343516
Chuanbao Du, Zheng Liu, Congguang Mao, Xu Zhang
The existing literatures concentrating on the statistical analysis of transient response of antennas in High altitude electromagnetic pulse (HEMP) environment always use an area-based method to compute statistical results from burst view. This paper provides the statistical analysis from a new perspective of facility view by setting facility position as observation location, and makes a comparison of transient response between these two viewpoints. The conclusion reveals that from multiple views to analyze the statistics of antenna response will be benefit for system-level HEMP vulnerability assessment and anti-HEMP protection design.
{"title":"A New Perspective from Facility Position for the Statistical Analysis of Antenna Transient Response Excited by HEMP","authors":"Chuanbao Du, Zheng Liu, Congguang Mao, Xu Zhang","doi":"10.1109/NEMO49486.2020.9343516","DOIUrl":"https://doi.org/10.1109/NEMO49486.2020.9343516","url":null,"abstract":"The existing literatures concentrating on the statistical analysis of transient response of antennas in High altitude electromagnetic pulse (HEMP) environment always use an area-based method to compute statistical results from burst view. This paper provides the statistical analysis from a new perspective of facility view by setting facility position as observation location, and makes a comparison of transient response between these two viewpoints. The conclusion reveals that from multiple views to analyze the statistics of antenna response will be benefit for system-level HEMP vulnerability assessment and anti-HEMP protection design.","PeriodicalId":305562,"journal":{"name":"2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131866369","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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