Pub Date : 2017-09-01DOI: 10.1109/EMCT.2017.8090377
Cihat Şeker, M. Güneser
In this study, we designed multi and wide band frequency monopole antenna, consisted of FR4 as a substrate with thickness of 1.6mm. The radiating element is printed on a truncated metallic ground plane. Proposed antenna operates in UMTS and WLAN wireless communications applications at 1.9 GHz and 4.9 GHz respectively. The antenna was applied on FR4 plate with the dimensions of 42 × 42 × 1.6 mm3. This monopole antenna was designed using computer simulation technology 2015 (ANSYS HFSS: High Frequency Electromagnetic Field Simulation). The performance was examined based on return loss, radiation pattern, gain, efficiency and VSWR.
{"title":"Design of dual-band frequency compact microstrip antenna for UMTS and WLAN applications","authors":"Cihat Şeker, M. Güneser","doi":"10.1109/EMCT.2017.8090377","DOIUrl":"https://doi.org/10.1109/EMCT.2017.8090377","url":null,"abstract":"In this study, we designed multi and wide band frequency monopole antenna, consisted of FR4 as a substrate with thickness of 1.6mm. The radiating element is printed on a truncated metallic ground plane. Proposed antenna operates in UMTS and WLAN wireless communications applications at 1.9 GHz and 4.9 GHz respectively. The antenna was applied on FR4 plate with the dimensions of 42 × 42 × 1.6 mm3. This monopole antenna was designed using computer simulation technology 2015 (ANSYS HFSS: High Frequency Electromagnetic Field Simulation). The performance was examined based on return loss, radiation pattern, gain, efficiency and VSWR.","PeriodicalId":104929,"journal":{"name":"2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye)","volume":"11 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120995531","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 : 2017-09-01DOI: 10.1109/EMCT.2017.8090356
F. Bulut, H. S. Efendioglu, Veyis Solak, Mehmet Yabuloğlu, H. Özer
The use of electromagnetic shielding materials continues to grow in terms of research and application at various areas. In this paper, shielding effectiveness measurements are conducted to investigate the behavior of three different materials against electromagnetic fields. These materials are copper wire mesh, galvanized wire mesh, and aluminum plate. The purpose of using wire mesh structures is to provide physical ease of use, low price, market accessibility, and lightweight. Metal plates have high shielding effectiveness values. However, they have some disadvantages such as the difficulty of construction and the high price restrict the use of this product. The materials used in this study can be utilized to reduce the radiated emission of devices in a building that processes classified information in terms of TEMPEST. These three materials can be applied to the surface of the building for preventing the spread of information leakages and protecting human exposure from electromagnetic fields in houses. They also help to protect critical devices inside the building, especially the server rooms, from undesired signals (EMC threats). The results presented in this paper will show the most effective shielding properties by comparing these three materials.
{"title":"Electromagnetic shielding behavior of different metallic wire-meshes and thin metal plate","authors":"F. Bulut, H. S. Efendioglu, Veyis Solak, Mehmet Yabuloğlu, H. Özer","doi":"10.1109/EMCT.2017.8090356","DOIUrl":"https://doi.org/10.1109/EMCT.2017.8090356","url":null,"abstract":"The use of electromagnetic shielding materials continues to grow in terms of research and application at various areas. In this paper, shielding effectiveness measurements are conducted to investigate the behavior of three different materials against electromagnetic fields. These materials are copper wire mesh, galvanized wire mesh, and aluminum plate. The purpose of using wire mesh structures is to provide physical ease of use, low price, market accessibility, and lightweight. Metal plates have high shielding effectiveness values. However, they have some disadvantages such as the difficulty of construction and the high price restrict the use of this product. The materials used in this study can be utilized to reduce the radiated emission of devices in a building that processes classified information in terms of TEMPEST. These three materials can be applied to the surface of the building for preventing the spread of information leakages and protecting human exposure from electromagnetic fields in houses. They also help to protect critical devices inside the building, especially the server rooms, from undesired signals (EMC threats). The results presented in this paper will show the most effective shielding properties by comparing these three materials.","PeriodicalId":104929,"journal":{"name":"2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116912432","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 : 2017-09-01DOI: 10.1109/EMCT.2017.8090374
Isa Kocakarin, K. Yeğin
Signal penetration into missiles through nose cone and apertures is critical for electro-optical guidance systems, navigation equipment and control of explosive ordnance. Penetrated signals are relatively small but hard to simulate by known computational methods. To corroborate simulation results, we created a scaled version of a missile and placed wire antennas inside this mock missile. The prototype has openings on the nose cone. Measurements are performed for different antenna sizes placed inside the nose cone. These measurements, then, are compared to numerically calculated simulation results. The extent of corroboration and possible ways to improve correct prediction of signal coupling are discussed.
{"title":"Measurements of signal penetration into mock missiles","authors":"Isa Kocakarin, K. Yeğin","doi":"10.1109/EMCT.2017.8090374","DOIUrl":"https://doi.org/10.1109/EMCT.2017.8090374","url":null,"abstract":"Signal penetration into missiles through nose cone and apertures is critical for electro-optical guidance systems, navigation equipment and control of explosive ordnance. Penetrated signals are relatively small but hard to simulate by known computational methods. To corroborate simulation results, we created a scaled version of a missile and placed wire antennas inside this mock missile. The prototype has openings on the nose cone. Measurements are performed for different antenna sizes placed inside the nose cone. These measurements, then, are compared to numerically calculated simulation results. The extent of corroboration and possible ways to improve correct prediction of signal coupling are discussed.","PeriodicalId":104929,"journal":{"name":"2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye)","volume":"218 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115249300","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 : 2017-09-01DOI: 10.1109/EMCT.2017.8090363
Merve Deniz Kozan, M. Uysal, Erdal Usta
Military systems are exposed to electromagnetic fields that are originated internally or externally during the whole operational life cycle. Military systems should perform their critical operational missions without any functional/performance degradation. In the case of military systems, due to the complexity of the complete vehicle electronic system architectures, electromagnetic compatibility requirements should be specified and verified by serial tests. “MIL-STD-464 Electromagnetic Environmental Effects Requirements for the Systems” is one of the well-known system level electromagnetic compatibility standard. Besides the requirements of this standard, it should not be forgotten that success of the subsystem level electromagnetic compatibility test provides convenience for system-level test. Some of the requirements in the standard may not be applicable for all systems. It should be tailored specifically for the mission area and mission critical operations of the systems. In this paper, system level requirements for ground army platforms especially have complex electronic subsystem configuration, are discussed.
{"title":"EMC test requirements for combat vehicles","authors":"Merve Deniz Kozan, M. Uysal, Erdal Usta","doi":"10.1109/EMCT.2017.8090363","DOIUrl":"https://doi.org/10.1109/EMCT.2017.8090363","url":null,"abstract":"Military systems are exposed to electromagnetic fields that are originated internally or externally during the whole operational life cycle. Military systems should perform their critical operational missions without any functional/performance degradation. In the case of military systems, due to the complexity of the complete vehicle electronic system architectures, electromagnetic compatibility requirements should be specified and verified by serial tests. “MIL-STD-464 Electromagnetic Environmental Effects Requirements for the Systems” is one of the well-known system level electromagnetic compatibility standard. Besides the requirements of this standard, it should not be forgotten that success of the subsystem level electromagnetic compatibility test provides convenience for system-level test. Some of the requirements in the standard may not be applicable for all systems. It should be tailored specifically for the mission area and mission critical operations of the systems. In this paper, system level requirements for ground army platforms especially have complex electronic subsystem configuration, are discussed.","PeriodicalId":104929,"journal":{"name":"2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124219994","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 : 2017-09-01DOI: 10.1109/EMCT.2017.8090370
B. Yıldırım
A pulse transmitter operating at VHF band has been designed using a pulse generator circuit and a pulse amplifier. The pulse generator circuit has been built using commercially available digital logic integrated circuits by taking advantage of the propagation delay characteristics. The pulse generator circuit produces a very short pulse in the order of several nanoseconds which is amplified by an RF amplifier. The goal of this design is to provide active shielding for electronics equipment within the VHF band when the well known passive shielding technique-Faraday cage-is unavailable or takes up too much space or is very costly.
{"title":"VHF pulse transmitter for EMC applications","authors":"B. Yıldırım","doi":"10.1109/EMCT.2017.8090370","DOIUrl":"https://doi.org/10.1109/EMCT.2017.8090370","url":null,"abstract":"A pulse transmitter operating at VHF band has been designed using a pulse generator circuit and a pulse amplifier. The pulse generator circuit has been built using commercially available digital logic integrated circuits by taking advantage of the propagation delay characteristics. The pulse generator circuit produces a very short pulse in the order of several nanoseconds which is amplified by an RF amplifier. The goal of this design is to provide active shielding for electronics equipment within the VHF band when the well known passive shielding technique-Faraday cage-is unavailable or takes up too much space or is very costly.","PeriodicalId":104929,"journal":{"name":"2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131337986","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 : 2017-09-01DOI: 10.1109/EMCT.2017.8090372
U. M. Gür, Barışcan Karaosmanogglu, Ö. Ergül
A recently introduced potential integral equations for stable analysis of low-frequency problems involving dense discretizations with respect to wavelength are solved by using the fast multipole method (FMM). Two different implementations of FMM based on multipoles and an approximate diagonalization employing scaled plane waves are developed and used for rigorous solutions of low-frequency problems. Numerical results on canonical problems demonstrate excellent stability and solution capabilities of both implementations.
{"title":"Fast-multipole-method solutions of new potential integral equations","authors":"U. M. Gür, Barışcan Karaosmanogglu, Ö. Ergül","doi":"10.1109/EMCT.2017.8090372","DOIUrl":"https://doi.org/10.1109/EMCT.2017.8090372","url":null,"abstract":"A recently introduced potential integral equations for stable analysis of low-frequency problems involving dense discretizations with respect to wavelength are solved by using the fast multipole method (FMM). Two different implementations of FMM based on multipoles and an approximate diagonalization employing scaled plane waves are developed and used for rigorous solutions of low-frequency problems. Numerical results on canonical problems demonstrate excellent stability and solution capabilities of both implementations.","PeriodicalId":104929,"journal":{"name":"2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129944917","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 : 2017-09-01DOI: 10.1109/EMCT.2017.8090381
U. Hasar, M. Bute, A. Muratoglu
It is well-known that a resonating metamaterial can interact with other nearby resonating metamaterials. If this coupling is strong enough, it may change resonant behaviour of overall metamaterial structure composed of individual metamaterial resonators. Therefore, defining each part separately, especially the coupling factor, simplifies the electromagnetic compatibility (EMC) problems. In this study, our purpose is to investigate/disclose the coupling phenomenon by application of the signal flow graph technique using scattering parameters of individual resonators and of overall metamaterial structure. By monitoring any change between the scattering parameters of the overall metamaterial structure and the scattering parameters obtained from cascaded individual metamaterial resonators using the signal flow graph technique, any coupling between metamaterial resonators is analyzed.
{"title":"Coupling analysis of resonating metamaterial slabs for the role of EMC problems","authors":"U. Hasar, M. Bute, A. Muratoglu","doi":"10.1109/EMCT.2017.8090381","DOIUrl":"https://doi.org/10.1109/EMCT.2017.8090381","url":null,"abstract":"It is well-known that a resonating metamaterial can interact with other nearby resonating metamaterials. If this coupling is strong enough, it may change resonant behaviour of overall metamaterial structure composed of individual metamaterial resonators. Therefore, defining each part separately, especially the coupling factor, simplifies the electromagnetic compatibility (EMC) problems. In this study, our purpose is to investigate/disclose the coupling phenomenon by application of the signal flow graph technique using scattering parameters of individual resonators and of overall metamaterial structure. By monitoring any change between the scattering parameters of the overall metamaterial structure and the scattering parameters obtained from cascaded individual metamaterial resonators using the signal flow graph technique, any coupling between metamaterial resonators is analyzed.","PeriodicalId":104929,"journal":{"name":"2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131813007","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 : 2017-09-01DOI: 10.1109/EMCT.2017.8090361
Asmae El Mejdoubi, H. Gualous, H. Chaoui, G. Alcicek
The main challenge with lithium-ion batteries in vehicular applications is aging. It is known that the battery aging is sensitive to various factors such as current, temperature and depth of discharge. These elements have a considerable impact on the loss of the battery's capacity, as well as on the increase of the internal resistance. In this article, we present an analysis of the aging of lithium-ion batteries in order to predict their failures. The comprehension of aging can retroact on the operating conditions in order to improve reliability. Thus, the work carried out involves the experimental analysis of a LiFePO4 battery's calendar aging under different discharge currents and temperatures.
{"title":"Experimental investigation of calendar aging of lithium-ion batteries for vehicular applications","authors":"Asmae El Mejdoubi, H. Gualous, H. Chaoui, G. Alcicek","doi":"10.1109/EMCT.2017.8090361","DOIUrl":"https://doi.org/10.1109/EMCT.2017.8090361","url":null,"abstract":"The main challenge with lithium-ion batteries in vehicular applications is aging. It is known that the battery aging is sensitive to various factors such as current, temperature and depth of discharge. These elements have a considerable impact on the loss of the battery's capacity, as well as on the increase of the internal resistance. In this article, we present an analysis of the aging of lithium-ion batteries in order to predict their failures. The comprehension of aging can retroact on the operating conditions in order to improve reliability. Thus, the work carried out involves the experimental analysis of a LiFePO4 battery's calendar aging under different discharge currents and temperatures.","PeriodicalId":104929,"journal":{"name":"2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131960179","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 : 2017-09-01DOI: 10.1109/EMCT.2017.8090366
M. Dogan, G. Turhan‐Sayan
Ground penetrating radar (GPR) is an electromagnetic sensor based on the ultra-wideband radar technology that can also be used for through-the-wall (TTW) target recognition. Search for the presence of designated targets hidden behind the walls, such as stationary or moving human bodies or certain types of weapons, is addressed in various critical applications; in rescue missions after earthquakes or in military operations, etc. In such inverse problems, type of the wall is as important as the properties and location of the hidden target. Interpretation of the basic A-Scan GPR signals is a challenging task in the TTW target detection problem especially when the wall is constructed by bricks containing air-filled holes. In this paper, a simplified TTW target detection scenario is defined using cylindrical targets made of conductor or plastic materials. The target is placed behind the brick wall at different distances where the wall is made of either homogeneous solid bricks or inhomogeneous bricks that contain periodically located air-filled compartments. GPR signals are simulated for such target detection scenarios using a numerical computation tool that is based on the finite difference time domain (FDTD) technique. Then, simulated signals are analyzed in time domain for preprocessing and target detection. Energy based signal features are used to eliminate strong early-time reflections from the front face of the wall to enhance the signal components scattered by the target for better detection performance.
{"title":"Through-the-wall target detection using gpr A-Scan data: Effects of different wall structures on detection performance","authors":"M. Dogan, G. Turhan‐Sayan","doi":"10.1109/EMCT.2017.8090366","DOIUrl":"https://doi.org/10.1109/EMCT.2017.8090366","url":null,"abstract":"Ground penetrating radar (GPR) is an electromagnetic sensor based on the ultra-wideband radar technology that can also be used for through-the-wall (TTW) target recognition. Search for the presence of designated targets hidden behind the walls, such as stationary or moving human bodies or certain types of weapons, is addressed in various critical applications; in rescue missions after earthquakes or in military operations, etc. In such inverse problems, type of the wall is as important as the properties and location of the hidden target. Interpretation of the basic A-Scan GPR signals is a challenging task in the TTW target detection problem especially when the wall is constructed by bricks containing air-filled holes. In this paper, a simplified TTW target detection scenario is defined using cylindrical targets made of conductor or plastic materials. The target is placed behind the brick wall at different distances where the wall is made of either homogeneous solid bricks or inhomogeneous bricks that contain periodically located air-filled compartments. GPR signals are simulated for such target detection scenarios using a numerical computation tool that is based on the finite difference time domain (FDTD) technique. Then, simulated signals are analyzed in time domain for preprocessing and target detection. Energy based signal features are used to eliminate strong early-time reflections from the front face of the wall to enhance the signal components scattered by the target for better detection performance.","PeriodicalId":104929,"journal":{"name":"2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121001108","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 : 2017-09-01DOI: 10.1109/EMCT.2017.8090376
S. Güler, B. Solak, Uğur Meriç Gür, Ö. Ergül
We present computational analysis of optical chiral metamaterials that consist of helical metallic elements. At optical frequencies, metals are modeled as penetrable objects with plasmonic properties. A rigorous implementation based on boundary element methods and the multilevel fast multipole algorithm is used for efficient and accurate analysis of three-dimensional structures. Numerical results demonstrate interesting polarization-rotating characteristics of such arrays with helical elements, as well as their complex responses depending on geometric parameters.
{"title":"Full-wave computational analysis of optical chiral metamaterials","authors":"S. Güler, B. Solak, Uğur Meriç Gür, Ö. Ergül","doi":"10.1109/EMCT.2017.8090376","DOIUrl":"https://doi.org/10.1109/EMCT.2017.8090376","url":null,"abstract":"We present computational analysis of optical chiral metamaterials that consist of helical metallic elements. At optical frequencies, metals are modeled as penetrable objects with plasmonic properties. A rigorous implementation based on boundary element methods and the multilevel fast multipole algorithm is used for efficient and accurate analysis of three-dimensional structures. Numerical results demonstrate interesting polarization-rotating characteristics of such arrays with helical elements, as well as their complex responses depending on geometric parameters.","PeriodicalId":104929,"journal":{"name":"2017 IV International Electromagnetic Compatibility Conference (EMC Turkiye)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116462307","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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