Pub Date : 2021-06-01DOI: 10.23919/URSIRSB.2021.9829354
Constantine A. Balanis;John N. Sahalos
Prof. Theodoras D. Tsiboukis - EM scholar, friend and colleague of ours and of many others in URSI, IEEE, and around the world - passed away on April 11, 2021. He was born in Larisa, Thessaly, Greece, in 1948. He received the Diploma in Electrical and Mechanical Engineering from the National Technical University of Athens (NTUA), Greece, in 1971, and the Doctor Engineering in 1981 from the Aristotle University of Thessaloniki (AUTH), Thessaloniki, Greece. From 1981 to 1982, he joined the Electrical Engineering Department of the University of Southampton, England, as a Senior Research Fellow. In 1982, he joined the Department of Electrical and Computer Engineering (DECE) of AUTH, until 2015 when he retired as Professor Emeritus. During his tenure at DECE-AUTH, he served in many administrative positions, including 1993–1998 as Director of the Division of Telecommunications at the DECE, and from 1997–1998 as Chair of DECE. He was the Founder (1989) and the Head of the Applied and Computational Electromagnetics (ACEM) Laboratory until 2015.
{"title":"In memoriam: Theodoros D. Tsiboukis","authors":"Constantine A. Balanis;John N. Sahalos","doi":"10.23919/URSIRSB.2021.9829354","DOIUrl":"https://doi.org/10.23919/URSIRSB.2021.9829354","url":null,"abstract":"Prof. Theodoras D. Tsiboukis - EM scholar, friend and colleague of ours and of many others in URSI, IEEE, and around the world - passed away on April 11, 2021. He was born in Larisa, Thessaly, Greece, in 1948. He received the Diploma in Electrical and Mechanical Engineering from the National Technical University of Athens (NTUA), Greece, in 1971, and the Doctor Engineering in 1981 from the Aristotle University of Thessaloniki (AUTH), Thessaloniki, Greece. From 1981 to 1982, he joined the Electrical Engineering Department of the University of Southampton, England, as a Senior Research Fellow. In 1982, he joined the Department of Electrical and Computer Engineering (DECE) of AUTH, until 2015 when he retired as Professor Emeritus. During his tenure at DECE-AUTH, he served in many administrative positions, including 1993–1998 as Director of the Division of Telecommunications at the DECE, and from 1997–1998 as Chair of DECE. He was the Founder (1989) and the Head of the Applied and Computational Electromagnetics (ACEM) Laboratory until 2015.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2021 377","pages":"62-62"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9829337/09829354.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50350959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-01DOI: 10.23919/URSIRSB.2021.9829365
{"title":"Information for authors","authors":"","doi":"10.23919/URSIRSB.2021.9829365","DOIUrl":"https://doi.org/10.23919/URSIRSB.2021.9829365","url":null,"abstract":"","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2021 377","pages":"91-91"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9829337/09829365.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50351143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-01DOI: 10.23919/URSIRSB.2021.9829341
{"title":"URSI officers and secretariat","authors":"","doi":"10.23919/URSIRSB.2021.9829341","DOIUrl":"https://doi.org/10.23919/URSIRSB.2021.9829341","url":null,"abstract":"","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2021 377","pages":"6-7"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9829337/09829341.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50351149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.23919/URSIRSB.2021.9682645
James C. Lin
Over the past four or five years, nearly 200 US personnel have reported similarly mysterious attacks while working in places such as Havana, Guangzhou, London, Moscow, Vienna, and Washington, DC. It seems that every few months if not weeks, another mysterious attack on US diplomatic and intelligence personnel is reported, some as recent as July 2021 [1-3], The acute symptoms include headache and nausea, immediately following the hearing of loud buzzing or bursts of sounds. The illness and symptoms have been called the Havana Syndrome, after the city where cases were first reported. This refers to the range of symptoms first experienced by US State Department personnel stationed at the American embassy in Havana, Cuba.
{"title":"Weaponizing the microwave auditory effect and the Havana Syndrome","authors":"James C. Lin","doi":"10.23919/URSIRSB.2021.9682645","DOIUrl":"https://doi.org/10.23919/URSIRSB.2021.9682645","url":null,"abstract":"Over the past four or five years, nearly 200 US personnel have reported similarly mysterious attacks while working in places such as Havana, Guangzhou, London, Moscow, Vienna, and Washington, DC. It seems that every few months if not weeks, another mysterious attack on US diplomatic and intelligence personnel is reported, some as recent as July 2021 [1-3], The acute symptoms include headache and nausea, immediately following the hearing of loud buzzing or bursts of sounds. The illness and symptoms have been called the Havana Syndrome, after the city where cases were first reported. This refers to the range of symptoms first experienced by US State Department personnel stationed at the American embassy in Havana, Cuba.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2021 376","pages":"36-38"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9682635/09682645.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50303730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.23919/URSIRSB.2021.9682643
Gökhan Karaova;Özgür Eriş;Özgür Ergül
In the area of computational electromagnetics, there is an extensive literature on broadband solvers that were developed to analyze multiscale objects [1-11]. Some of these structures involved small details, the numerical solutions to which with conventional elements - such as triangles - required dense discretizations with respect to wavelength. Some other objects may have needed dense discretizations to accurately model equivalent currents at critical locations, even if their geometric features allowed larger elements. In any case, development and implementation of a broadband solver to handle such relatively large objects with dense discretizations are often associated with maintaining "low-frequency" stability [12-30], since the conventional methods tend to break down when discretization elements become small in comparison to the operating wavelength. Accuracy and efficiency are sought in terms of two components: formulation/ discretization and solution algorithms. In the context of formulation/discretization, alternative formulations have been developed, e.g., the augmented electric-field integral equation [14, 19], potential integral equations (PIEs) [23-26], and other formulations incorporating electric charges, to name a few for perfect electric conductors (PECs). In terms of solution algorithms, low-frequency-stable methods havebeencontinuouslyproposedand implemented. Diverse implementations of the low-frequency Multilevel Fast Multipole Algorithm (MLFMA) using multipoles [1,4], inhomogeneous plane waves [3, 12], or other expansion techniques [9, 11, 28-30] merely form one track on the development ofbroadband solution algorithms.
{"title":"SOLBOX-22: Solution to problems involving a wide range of scales using the combined potential-field formulation","authors":"Gökhan Karaova;Özgür Eriş;Özgür Ergül","doi":"10.23919/URSIRSB.2021.9682643","DOIUrl":"https://doi.org/10.23919/URSIRSB.2021.9682643","url":null,"abstract":"In the area of computational electromagnetics, there is an extensive literature on broadband solvers that were developed to analyze multiscale objects [1-11]. Some of these structures involved small details, the numerical solutions to which with conventional elements - such as triangles - required dense discretizations with respect to wavelength. Some other objects may have needed dense discretizations to accurately model equivalent currents at critical locations, even if their geometric features allowed larger elements. In any case, development and implementation of a broadband solver to handle such relatively large objects with dense discretizations are often associated with maintaining \"low-frequency\" stability [12-30], since the conventional methods tend to break down when discretization elements become small in comparison to the operating wavelength. Accuracy and efficiency are sought in terms of two components: formulation/ discretization and solution algorithms. In the context of formulation/discretization, alternative formulations have been developed, e.g., the augmented electric-field integral equation [14, 19], potential integral equations (PIEs) [23-26], and other formulations incorporating electric charges, to name a few for perfect electric conductors (PECs). In terms of solution algorithms, low-frequency-stable methods havebeencontinuouslyproposedand implemented. Diverse implementations of the low-frequency Multilevel Fast Multipole Algorithm (MLFMA) using multipoles [1,4], inhomogeneous plane waves [3, 12], or other expansion techniques [9, 11, 28-30] merely form one track on the development ofbroadband solution algorithms.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2021 376","pages":"25-33"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9682635/09682643.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50303802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.23919/URSIRSB.2021.9682648
{"title":"Become an individual member of URSI","authors":"","doi":"10.23919/URSIRSB.2021.9682648","DOIUrl":"https://doi.org/10.23919/URSIRSB.2021.9682648","url":null,"abstract":"","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2021 376","pages":"41-41"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9682635/09682648.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50303810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.23919/URSIRSB.2021.9682647
{"title":"Information for authors","authors":"","doi":"10.23919/URSIRSB.2021.9682647","DOIUrl":"https://doi.org/10.23919/URSIRSB.2021.9682647","url":null,"abstract":"","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2021 376","pages":"40-40"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9682635/09682647.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50303728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Leadless cardiac pacemakers (LCP) are the cutting-edge technology of cardiac rhythm management (CRM), reducing complication risks and treatment invasivity. Current leadless cardiac pacemakers can only pace a single location of the heart, limiting their use to a small fraction of the bradycardia patient population. A dual-chamber system of synchronized leadless cardiac pacemakers is required to cover the major part of bradycardia patients. The power consumption relating the synchronization of pacemaker nodes is one of the major technological challenges preventing the rise of dual-chamber leadless cardiac pacemaker systems. Intra-body communication (IBC) is considered a suitable technology for leadless cardiac pacemaker applications, in terms of both power and size optimization. In this work, we suggest a power-optimized method for atrioventricular synchronization (AVS). First, we estimated the channel loss for intra-cardiac intra-body communication signals using quasi-static simulations. This was an essential study to define the specification limits of intra-body communication transceivers for atrioventricular synchronization. We then designed a superregenerative receiver (SRR) in 0.18 μm CMOS technology. The power consumption of the superregenerative receiver circuit was further optimized using a communication strategy for the atrioventricular synchronization application, achieving levels of power consumption as low as 340 nW. This study showed the feasibility of atelemetry-based synchronization of dual-chamber leadless cardiac pacemaker systems while minimizing the impact on the device's longevity.
{"title":"Ultra-low power system for atrioventricular synchronization using leadless pacemakers","authors":"Mirko Maldari;Chadi Jabbour;Youcef Haddab;Patricia Desgreys","doi":"10.23919/URSIRSB.2021.9682641","DOIUrl":"https://doi.org/10.23919/URSIRSB.2021.9682641","url":null,"abstract":"Leadless cardiac pacemakers (LCP) are the cutting-edge technology of cardiac rhythm management (CRM), reducing complication risks and treatment invasivity. Current leadless cardiac pacemakers can only pace a single location of the heart, limiting their use to a small fraction of the bradycardia patient population. A dual-chamber system of synchronized leadless cardiac pacemakers is required to cover the major part of bradycardia patients. The power consumption relating the synchronization of pacemaker nodes is one of the major technological challenges preventing the rise of dual-chamber leadless cardiac pacemaker systems. Intra-body communication (IBC) is considered a suitable technology for leadless cardiac pacemaker applications, in terms of both power and size optimization. In this work, we suggest a power-optimized method for atrioventricular synchronization (AVS). First, we estimated the channel loss for intra-cardiac intra-body communication signals using quasi-static simulations. This was an essential study to define the specification limits of intra-body communication transceivers for atrioventricular synchronization. We then designed a superregenerative receiver (SRR) in 0.18 μm CMOS technology. The power consumption of the superregenerative receiver circuit was further optimized using a communication strategy for the atrioventricular synchronization application, achieving levels of power consumption as low as 340 nW. This study showed the feasibility of atelemetry-based synchronization of dual-chamber leadless cardiac pacemaker systems while minimizing the impact on the device's longevity.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2021 376","pages":"9-23"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9682635/09682641.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50303804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.23919/URSIRSB.2021.9682640
W. Ross Stone
Most of the more than one million cardiac pacemakers implanted each year have up to three leads that reach into the heart's chambers. The most modern pacemakers integrate all of the pacemaker functions into a small capsule that be directly implanted into the endocardium, resulting in what is known as a leadless cardiac pacemaker. However, these can typically only be used to stimulate a single chamber. By using intra-body communication, the operation of more than one leadless cardiac pacemaker can be synchronized, resulting in the ability to use this approach with multiple chambers of the heart. The paper by Mirko Maldari, Chadi Jabbour, Youcef Haddab, and Patricia Desgreys describes a system for such intra-body communication for pacemakers. The design and development of the system is described, as well as the optimization of the power usage of the system based on the signal waveform involved. The results demonstrated the telemetry-based synchronization of a dual-chamber leadless cardiac pacemaker system with minimum power consumption. This paper was based on one of the finalists for the 2021 URSI-France PhD Prize in Radio Science.
{"title":"Editor's comments","authors":"W. Ross Stone","doi":"10.23919/URSIRSB.2021.9682640","DOIUrl":"https://doi.org/10.23919/URSIRSB.2021.9682640","url":null,"abstract":"Most of the more than one million cardiac pacemakers implanted each year have up to three leads that reach into the heart's chambers. The most modern pacemakers integrate all of the pacemaker functions into a small capsule that be directly implanted into the endocardium, resulting in what is known as a leadless cardiac pacemaker. However, these can typically only be used to stimulate a single chamber. By using intra-body communication, the operation of more than one leadless cardiac pacemaker can be synchronized, resulting in the ability to use this approach with multiple chambers of the heart. The paper by Mirko Maldari, Chadi Jabbour, Youcef Haddab, and Patricia Desgreys describes a system for such intra-body communication for pacemakers. The design and development of the system is described, as well as the optimization of the power usage of the system based on the signal waveform involved. The results demonstrated the telemetry-based synchronization of a dual-chamber leadless cardiac pacemaker system with minimum power consumption. This paper was based on one of the finalists for the 2021 URSI-France PhD Prize in Radio Science.","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2021 376","pages":"8-8"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9682635/09682640.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50303805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.23919/URSIRSB.2021.9682639
{"title":"URSI officers and secretariat","authors":"","doi":"10.23919/URSIRSB.2021.9682639","DOIUrl":"https://doi.org/10.23919/URSIRSB.2021.9682639","url":null,"abstract":"","PeriodicalId":101270,"journal":{"name":"URSI Radio Science Bulletin","volume":"2021 376","pages":"6-7"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7873543/9682635/09682639.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50303806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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