Pub Date : 2018-12-01DOI: 10.1109/ISAPE.2018.8634183
Zhiwei He, Hongfu Guo
On PCB (Printed Circuit Board), the crystal oscillator circuit is the main source of electromagnetic radiation (EMR) interference. The simulation and analysis of its EMR characteristics is one of the key tasks of PCB EMC (Electro Magnetic Compatibility) design. In this paper, the simulation models are established by HFSS, and the EMR characteristics of crystal oscillator in different cases are simulated and analyzed. And the relationships between the electric field intensity and frequency are got. The simulation result shows that the area of the larger field intensity is concentrated in the middle part of the two pipe feet. When the shell is grounded, the field intensity around the shell is almost 0. When the PCB wireway is connected, the field intensity changes to concentrate at the end of the wireway. When the grounding capacitance is connected, the maximum field intensity decreases by 77.02%. The conclusion of this research provides an important theoretical basis for improving the EMC design of PCB.
{"title":"EMR Field Distribution Analysis of Crystal Oscillator on PCB","authors":"Zhiwei He, Hongfu Guo","doi":"10.1109/ISAPE.2018.8634183","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634183","url":null,"abstract":"On PCB (Printed Circuit Board), the crystal oscillator circuit is the main source of electromagnetic radiation (EMR) interference. The simulation and analysis of its EMR characteristics is one of the key tasks of PCB EMC (Electro Magnetic Compatibility) design. In this paper, the simulation models are established by HFSS, and the EMR characteristics of crystal oscillator in different cases are simulated and analyzed. And the relationships between the electric field intensity and frequency are got. The simulation result shows that the area of the larger field intensity is concentrated in the middle part of the two pipe feet. When the shell is grounded, the field intensity around the shell is almost 0. When the PCB wireway is connected, the field intensity changes to concentrate at the end of the wireway. When the grounding capacitance is connected, the maximum field intensity decreases by 77.02%. The conclusion of this research provides an important theoretical basis for improving the EMC design of PCB.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131639118","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634159
Y. Zuo, Wei-jun Wu, Qi-feng Liu
A novel method incorporating the active element pattern (AEP) into the quantum search algorithm (QSA) procedure is presented to efficiently synthesize linear microstrip antenna arrays including mutual coupling. The proposed method has better pattern synthesis accuracy than the gravitational search algorithm (GSA). Numerical examples are given for synthesizing the Cosec-squared patterns of microstrip antenna arrays. Synthesis results show the effectiveness and advantages of the proposed method
{"title":"Efficient Linear Array Synthesis Including Coupling Effects Utilizing Quantum Search Algorithm and Active Element Pattern","authors":"Y. Zuo, Wei-jun Wu, Qi-feng Liu","doi":"10.1109/ISAPE.2018.8634159","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634159","url":null,"abstract":"A novel method incorporating the active element pattern (AEP) into the quantum search algorithm (QSA) procedure is presented to efficiently synthesize linear microstrip antenna arrays including mutual coupling. The proposed method has better pattern synthesis accuracy than the gravitational search algorithm (GSA). Numerical examples are given for synthesizing the Cosec-squared patterns of microstrip antenna arrays. Synthesis results show the effectiveness and advantages of the proposed method","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127006059","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634049
Xiaomin Shi, Chenhao Wang, Chuanyuan Zhao, Yan Zhang, Yuchen Zhao, Xiaoli Xi
A simple tri-band metamaterial-loaded small planar monopole antenna is proposed in this letter. In addition to the regular monopole resonance, two inverted L-shaped slots on the monopole patch are introduced to realize two other resonances. The metamaterial loading is then used to expand the lower resonant frequency. The proposed monopole antenna operates at two narrow bands, 5.2 and 6.0 GHz, and one wide band, 2.3-4.1 GHz, covering 2.4-GHz WLAN/Bluetooth (2400–2484 MHz), mobile WiMAX (2500-2690/3400-3690 MHz), 5-GHz WLAN (5150-5350/5725-5825 MHz), and ITS (5795–6400 MHz) with the advantages of simple fabrication, miniaturization, and compactness.
{"title":"Triple-band metamaterial-loaded small monopole antenna for mobile applications","authors":"Xiaomin Shi, Chenhao Wang, Chuanyuan Zhao, Yan Zhang, Yuchen Zhao, Xiaoli Xi","doi":"10.1109/ISAPE.2018.8634049","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634049","url":null,"abstract":"A simple tri-band metamaterial-loaded small planar monopole antenna is proposed in this letter. In addition to the regular monopole resonance, two inverted L-shaped slots on the monopole patch are introduced to realize two other resonances. The metamaterial loading is then used to expand the lower resonant frequency. The proposed monopole antenna operates at two narrow bands, 5.2 and 6.0 GHz, and one wide band, 2.3-4.1 GHz, covering 2.4-GHz WLAN/Bluetooth (2400–2484 MHz), mobile WiMAX (2500-2690/3400-3690 MHz), 5-GHz WLAN (5150-5350/5725-5825 MHz), and ITS (5795–6400 MHz) with the advantages of simple fabrication, miniaturization, and compactness.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121765371","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634130
Jiaqian Cui, A. Zhang, Zhensheng Shi, S. Yan, T. Kang
A compact combined antenna is proposed for pulse radiation in a UWB radar detection system in this paper. An exponentially tapered TEM horn is selected as the basic structure as well as the main radiated part, and a loading structure is used to improve its performance at low frequencies. Simulation results show that the loading structure generates a new radiator like a bow-tie antenna, decreasing the antenna size while not impacting the excellent radiating characteristics of the TEM horn antenna. The proposed structure has the advantages of wide bandwidth, compact size and high power capacity. As an antenna used for pulse radiation, the transmitted signal has little trailing and high EPP value in the time domain. Finally, the antenna is implemented and measured. The dimension of the antenna is $160mathbf{mm}^{star}330mathbf{mm}^{ast} 110mathbf{mm}$, and it can work from 250MHz to over 3GHz with the return loss below 7.5dB.
{"title":"A Compact Combined Antenna for Pulse Radiation","authors":"Jiaqian Cui, A. Zhang, Zhensheng Shi, S. Yan, T. Kang","doi":"10.1109/ISAPE.2018.8634130","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634130","url":null,"abstract":"A compact combined antenna is proposed for pulse radiation in a UWB radar detection system in this paper. An exponentially tapered TEM horn is selected as the basic structure as well as the main radiated part, and a loading structure is used to improve its performance at low frequencies. Simulation results show that the loading structure generates a new radiator like a bow-tie antenna, decreasing the antenna size while not impacting the excellent radiating characteristics of the TEM horn antenna. The proposed structure has the advantages of wide bandwidth, compact size and high power capacity. As an antenna used for pulse radiation, the transmitted signal has little trailing and high EPP value in the time domain. Finally, the antenna is implemented and measured. The dimension of the antenna is $160mathbf{mm}^{star}330mathbf{mm}^{ast} 110mathbf{mm}$, and it can work from 250MHz to over 3GHz with the return loss below 7.5dB.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127587825","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634379
Congcong Shi, Yannan Jiang, J. Zhao
Effective manipulation of polarization of electromagnetic (EM) waves has drawn a lot of research interests in many fields, such as the terahertz (THz) technology. In this paper, a broadband linear-to-circular (LTC) polarization converter based on metasurface is proposed in THz frequency. The proposed converter consists of periodic unit cells which are formed by patterned metal strips, a dielectric layer, and a fully reflective gold mirror. In the frequency range of 0.536-1.270THz, the converter can convert linear polarization wave into circular polarization wave with the axis ratio less than 3dB. The simulated results indicate that the relative bandwidth reaches 81.28% and the efficiency is higher than 74%, thus, the broadband LTC polarization conversion has been realized.
{"title":"Broadband Terahertz Linear-to-Circular Polarization Converter based on Metasurface","authors":"Congcong Shi, Yannan Jiang, J. Zhao","doi":"10.1109/ISAPE.2018.8634379","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634379","url":null,"abstract":"Effective manipulation of polarization of electromagnetic (EM) waves has drawn a lot of research interests in many fields, such as the terahertz (THz) technology. In this paper, a broadband linear-to-circular (LTC) polarization converter based on metasurface is proposed in THz frequency. The proposed converter consists of periodic unit cells which are formed by patterned metal strips, a dielectric layer, and a fully reflective gold mirror. In the frequency range of 0.536-1.270THz, the converter can convert linear polarization wave into circular polarization wave with the axis ratio less than 3dB. The simulated results indicate that the relative bandwidth reaches 81.28% and the efficiency is higher than 74%, thus, the broadband LTC polarization conversion has been realized.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132572430","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634351
Yunfan Peng, Wentao Wu, Liguo Sun, Jutao Yang
The ionospheric conductivity is an important parameter to describe the state of the ionosphere. There is a certain distribution law of the conductivity with the change of solar local time, latitudes and altitudes. In addition, some physical factors have direct effects on ionospheric conductivities. How these elements, such as solar activities, the geomagnetic index, electron temperature and electron density, influence it has been studied in this thesis, which will provide theoretical foundations and ideas for changing ionospheric conductivities manually.
{"title":"Study on Factors Influencing the Ionospheric Conductivity","authors":"Yunfan Peng, Wentao Wu, Liguo Sun, Jutao Yang","doi":"10.1109/ISAPE.2018.8634351","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634351","url":null,"abstract":"The ionospheric conductivity is an important parameter to describe the state of the ionosphere. There is a certain distribution law of the conductivity with the change of solar local time, latitudes and altitudes. In addition, some physical factors have direct effects on ionospheric conductivities. How these elements, such as solar activities, the geomagnetic index, electron temperature and electron density, influence it has been studied in this thesis, which will provide theoretical foundations and ideas for changing ionospheric conductivities manually.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132644031","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634404
Zhennan Xiao, B. Wei, Shitian Zhang, D. Ge, Qian Yang, Linqian Li
DGTD (Time Domain Discontinuous Galerkin) is a new time domain algorithm with broad application prospects in recent years. When dividing the computational domain, the tetrahedral mesh can fit the fine structure of the object, but for objects with larger geometrical dimensions, gets mass unknown and takes up too much resources. If use hexahedral mesh, a step error is generated at the fine structure. Therefore, this paper proposes a swap boundary method for tetrahedral and hexahedron elements. Different sub-domains are divided by different grid elements, and virtual elements exchange numerical fluxes on the swap boundary. The feasibility of this method is verified by the radiation example of electric dipole.
{"title":"A Hybrid Grid DGTD Algorithm for Tetrahedral and Hexahedron Based on Virtual Element","authors":"Zhennan Xiao, B. Wei, Shitian Zhang, D. Ge, Qian Yang, Linqian Li","doi":"10.1109/ISAPE.2018.8634404","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634404","url":null,"abstract":"DGTD (Time Domain Discontinuous Galerkin) is a new time domain algorithm with broad application prospects in recent years. When dividing the computational domain, the tetrahedral mesh can fit the fine structure of the object, but for objects with larger geometrical dimensions, gets mass unknown and takes up too much resources. If use hexahedral mesh, a step error is generated at the fine structure. Therefore, this paper proposes a swap boundary method for tetrahedral and hexahedron elements. Different sub-domains are divided by different grid elements, and virtual elements exchange numerical fluxes on the swap boundary. The feasibility of this method is verified by the radiation example of electric dipole.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133482334","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634260
Liandong Dai, Zonghua Ding, Song Yang, Zhimei Tang
Incoherent scatter radar (ISR) detects the Thomson scatter echo of free electrons to inverse ionosphere parameters and is thought as the most powerful instrument to observe the ionosphere on the ground. In fact there are usually severe ground clutters around altitude 100km in the echo data. This paper introduces pulse subtraction to deal with ground clutter by using the Qujing incoherent scatter radar data. The results show that this pulse subtraction suppresses ground clutter well.
{"title":"Ground clutter suppression: Preliminary analysis of Qujing incoherent scatter radar","authors":"Liandong Dai, Zonghua Ding, Song Yang, Zhimei Tang","doi":"10.1109/ISAPE.2018.8634260","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634260","url":null,"abstract":"Incoherent scatter radar (ISR) detects the Thomson scatter echo of free electrons to inverse ionosphere parameters and is thought as the most powerful instrument to observe the ionosphere on the ground. In fact there are usually severe ground clutters around altitude 100km in the echo data. This paper introduces pulse subtraction to deal with ground clutter by using the Qujing incoherent scatter radar data. The results show that this pulse subtraction suppresses ground clutter well.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"214 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134451365","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634114
Xinhua Yu, Guiyu Sun, Jun Wang, Xingqiang Huang
In this paper, a high-conversion converter is proposed, which uses the phase gradient metasurface (PGM), and can achieve efficient mutual conversion between spatially propagating waves (PW) and surface waves (SW). Simulations show that the converter has a PW-SW conversion of 99.99%, at 7.5 GHz, 0.09% higher than that of the similar type of designs available.
{"title":"A High-conversion PW-SW Converter Based on Phase Gradient Metasurface","authors":"Xinhua Yu, Guiyu Sun, Jun Wang, Xingqiang Huang","doi":"10.1109/ISAPE.2018.8634114","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634114","url":null,"abstract":"In this paper, a high-conversion converter is proposed, which uses the phase gradient metasurface (PGM), and can achieve efficient mutual conversion between spatially propagating waves (PW) and surface waves (SW). Simulations show that the converter has a PW-SW conversion of 99.99%, at 7.5 GHz, 0.09% higher than that of the similar type of designs available.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133047373","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634140
Wei Chen, Yuanchao Yang, Hao Li
This paper deals with a new trajectory optimization modeling and algorithm for the integrated scheduling of multiple aircraft under the complex electronic warfare environment. With the cooperative flying formation of the fighter aircraft and electronic warfare aircraft, the proposed modeling and algorithm can help the flight team fulfill an optimal mission accomplishment. The effectiveness of the modeling and algorithm is demonstrated by the corresponding test case.
{"title":"Integrated Trajectory Optimization of Multiple Aircraft under Electronic Warfare Environment","authors":"Wei Chen, Yuanchao Yang, Hao Li","doi":"10.1109/ISAPE.2018.8634140","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634140","url":null,"abstract":"This paper deals with a new trajectory optimization modeling and algorithm for the integrated scheduling of multiple aircraft under the complex electronic warfare environment. With the cooperative flying formation of the fighter aircraft and electronic warfare aircraft, the proposed modeling and algorithm can help the flight team fulfill an optimal mission accomplishment. The effectiveness of the modeling and algorithm is demonstrated by the corresponding test case.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115238748","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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