Pub Date : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055629
P. Wan, Baoyu Wu, Yuhua Cheng, Gaofeng Wang
One of the important problems in wireless rechargeable sensor networks is the deployment of charging base stations. Based on a convergent charging scheme, two new algorithms are proposed, by combining the solution of the Fermat point problem with the advantages of the greedy algorithm. Different from the existing solutions where the charging base stations are restricted on some special locations (like grid points), the charging base stations are more flexible in new algorithms. Instead of setting a charging circle, the specific variation of the power transfer efficiency with distance is used in the new algorithms to optimize the number of the charging base stations more accurately. The simulation results show that for different numbers of sensors, the proposed two algorithms can get a smaller number of base stations. Furthermore, the convex vertices priority algorithm has the advantage of less candidate base stations and consequently less time consuming.
{"title":"Charging base Stations Deployment Algorithms for Wireless Rechargeable Sensor Networks","authors":"P. Wan, Baoyu Wu, Yuhua Cheng, Gaofeng Wang","doi":"10.1109/WPTC45513.2019.9055629","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055629","url":null,"abstract":"One of the important problems in wireless rechargeable sensor networks is the deployment of charging base stations. Based on a convergent charging scheme, two new algorithms are proposed, by combining the solution of the Fermat point problem with the advantages of the greedy algorithm. Different from the existing solutions where the charging base stations are restricted on some special locations (like grid points), the charging base stations are more flexible in new algorithms. Instead of setting a charging circle, the specific variation of the power transfer efficiency with distance is used in the new algorithms to optimize the number of the charging base stations more accurately. The simulation results show that for different numbers of sensors, the proposed two algorithms can get a smaller number of base stations. Furthermore, the convex vertices priority algorithm has the advantage of less candidate base stations and consequently less time consuming.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123133846","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055622
Iman Abdali Mashhadi, B. Poorali, S. Hor, Majid Pahlevani, H. Pahlevani
This paper studies the performance of a wireless power and data transfer (WPDT) circuit for cochlear implants. Main features of the studied circuit include: 1) power transfer with high efficiency and low sensitivity to misalignment between coils, 2) simultaneous data transfer with high bandwidth, and 3) without the requirement of an extra DC-DC converter to control the output power. Having a controllable quality factor, this converter represents superior performance compared to conventional WPDT circuits. Unlike class E converters, this circuit employs a small input inductance, which results in better data transmission performance. Experimental results of a 1 MHz prototype are presented to verify its functionality.
{"title":"A New Wireless Power and Data Transmission Circuit for Cochlear Implants","authors":"Iman Abdali Mashhadi, B. Poorali, S. Hor, Majid Pahlevani, H. Pahlevani","doi":"10.1109/WPTC45513.2019.9055622","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055622","url":null,"abstract":"This paper studies the performance of a wireless power and data transfer (WPDT) circuit for cochlear implants. Main features of the studied circuit include: 1) power transfer with high efficiency and low sensitivity to misalignment between coils, 2) simultaneous data transfer with high bandwidth, and 3) without the requirement of an extra DC-DC converter to control the output power. Having a controllable quality factor, this converter represents superior performance compared to conventional WPDT circuits. Unlike class E converters, this circuit employs a small input inductance, which results in better data transmission performance. Experimental results of a 1 MHz prototype are presented to verify its functionality.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121080952","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055615
Veselin Manev, H. Visser, P. Baltus, Hao Gao
This paper presents a comparison of tunnel diode to Schottky diode in rectifier at 2.4 GHz under −10dBm input power region. The tunnel diode based rectifier has an advantage of quantum tunneling effect. Therefore it can achieve higher rectification efficiencies. In this work, GI401A tunnel diode and HSMS-285B Schottky diode are used. The input power range of measurements are from −10dBm to − 40dBm. In the same topology, same material, and the same input power situation, the tunnel diode based rectifier achieves 12.6% efficiency, while the Schottky diode based rectifier achieves 6.53% efficiency.
{"title":"A Comparison of Tunnel Diode and Schottky Diode in Rectifier at 2.4 GHz for Low Input Power Region","authors":"Veselin Manev, H. Visser, P. Baltus, Hao Gao","doi":"10.1109/WPTC45513.2019.9055615","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055615","url":null,"abstract":"This paper presents a comparison of tunnel diode to Schottky diode in rectifier at 2.4 GHz under −10dBm input power region. The tunnel diode based rectifier has an advantage of quantum tunneling effect. Therefore it can achieve higher rectification efficiencies. In this work, GI401A tunnel diode and HSMS-285B Schottky diode are used. The input power range of measurements are from −10dBm to − 40dBm. In the same topology, same material, and the same input power situation, the tunnel diode based rectifier achieves 12.6% efficiency, while the Schottky diode based rectifier achieves 6.53% efficiency.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126643528","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055591
S. Kojima, N. Shinohara
We proposed a new circularly polarized antenna which reduces the surface wave. The proposed antenna seems to be a combination of annular ring patch antenna and a patch antenna with shorted annular ring. The simulation results show that the proposed antenna can suppress the high order modes and improve the circular polarization characteristic than the conventional circularly polarized antenna with shorted annular ring. Moreover, it is feasible to integrate a rectifier on the same plane in the proposed antenna, whereas it is impossible in the conventional model due to the shorted wall.
{"title":"A New Circularly Polarized Antenna Suppressing Surface Wave for Microwave Power Transmission","authors":"S. Kojima, N. Shinohara","doi":"10.1109/WPTC45513.2019.9055591","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055591","url":null,"abstract":"We proposed a new circularly polarized antenna which reduces the surface wave. The proposed antenna seems to be a combination of annular ring patch antenna and a patch antenna with shorted annular ring. The simulation results show that the proposed antenna can suppress the high order modes and improve the circular polarization characteristic than the conventional circularly polarized antenna with shorted annular ring. Moreover, it is feasible to integrate a rectifier on the same plane in the proposed antenna, whereas it is impossible in the conventional model due to the shorted wall.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122649666","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055549
M. Ishii, K. Yamanaka, M. Sasaki
This paper presents a multiple Frequency Shift Keying (FSK) transmission system which can simultaneously transmit power and data using magnetic resonance wireless power transfer (MR-WPT). The main challenge of this paper is that the MR-WPT with the Automatic Tuning Assist Circuit (ATAC) enables a multiple FSK communication toward moving objects. The proposed system with ATAC can maintain the resonant state even though the driving frequencies of the transmitter slightly differ from the resonant frequency. Therefore, this characteristic means that it enables simultaneous transmission of power and FSK modulated data at multiple frequencies without a sharp decline in power transmission efficiency. The proposed system is implemented, and it shows double bit data transmission at the same symbol rate with multiple FSK modulation.
{"title":"Multiple FSK Data and Power Transmission System using Magnetic Resonance Wireless Power Transfer","authors":"M. Ishii, K. Yamanaka, M. Sasaki","doi":"10.1109/WPTC45513.2019.9055549","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055549","url":null,"abstract":"This paper presents a multiple Frequency Shift Keying (FSK) transmission system which can simultaneously transmit power and data using magnetic resonance wireless power transfer (MR-WPT). The main challenge of this paper is that the MR-WPT with the Automatic Tuning Assist Circuit (ATAC) enables a multiple FSK communication toward moving objects. The proposed system with ATAC can maintain the resonant state even though the driving frequencies of the transmitter slightly differ from the resonant frequency. Therefore, this characteristic means that it enables simultaneous transmission of power and FSK modulated data at multiple frequencies without a sharp decline in power transmission efficiency. The proposed system is implemented, and it shows double bit data transmission at the same symbol rate with multiple FSK modulation.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128975046","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055603
Hoang Le-Huu, N. Ha-Van, Seungmo Hong, C. Seo
This paper proposes a multiple-receiver wireless power transfer (WPT) system using a cubic transmitter. The theoretical analysis of the system is implemented to achieve a general formulation of the power transfer function. The system presents a pair of capacitors consisted of a series and a shunt capacitor to match the coil impedance to the source and load impedance. The desired values of lumped elements are also given to compute the scattering parameter as well as the power transfer efficiency (PTE).
{"title":"Multiple-receiver Wireless Power Transfer System Using a Cubic Transmitter","authors":"Hoang Le-Huu, N. Ha-Van, Seungmo Hong, C. Seo","doi":"10.1109/WPTC45513.2019.9055603","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055603","url":null,"abstract":"This paper proposes a multiple-receiver wireless power transfer (WPT) system using a cubic transmitter. The theoretical analysis of the system is implemented to achieve a general formulation of the power transfer function. The system presents a pair of capacitors consisted of a series and a shunt capacitor to match the coil impedance to the source and load impedance. The desired values of lumped elements are also given to compute the scattering parameter as well as the power transfer efficiency (PTE).","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124570224","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 : 2019-06-01DOI: 10.1109/wptc45513.2019.9055561
Copyright and Reprint Permission: Abstracting is permitted with credit to the source. Libraries are permitted to photocopy beyond the limit of U.S. copyright law for private use of patrons those articles in this volume that carry a code at the bottom of the first page, provided the per-copy fee indicated in the code is paid through Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923. For reprint or republication permission, email to IEEE Copyrights Manager at pubs-permissions@ieee.org.
{"title":"[Copyright notice]","authors":"","doi":"10.1109/wptc45513.2019.9055561","DOIUrl":"https://doi.org/10.1109/wptc45513.2019.9055561","url":null,"abstract":"Copyright and Reprint Permission: Abstracting is permitted with credit to the source. Libraries are permitted to photocopy beyond the limit of U.S. copyright law for private use of patrons those articles in this volume that carry a code at the bottom of the first page, provided the per-copy fee indicated in the code is paid through Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923. For reprint or republication permission, email to IEEE Copyrights Manager at pubs-permissions@ieee.org.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"412 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126691098","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055641
J. Hora, Xi Zhu, E. Dutkiewicz
This paper presents an RF-to-DC energy harvester in the Wi-Fi band. The energy harvester is meant to charge the 1.2V battery of the wireless sensor node device. The system design consists of three main circuit blocks: A low-dropout (LDO) voltage regulator, a charge control circuit and multistage differential-drive rectifier. The maximum PCE attained by the rectifier alone is 31.43%. The charge control circuit maintains the voltage within 1.3V-l.4V, while the LDO provides a stable and regulated output of 1.2V. The designed energy harvester has a minimum RF input power of −2.04 dBm. The chip layout of the overall design has a dimension of 1.2mm × 1.1mm.
{"title":"2.4 GHz CMOS Design RF-to-DC Energy Harvesting with Charge Control System for WSN Application","authors":"J. Hora, Xi Zhu, E. Dutkiewicz","doi":"10.1109/WPTC45513.2019.9055641","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055641","url":null,"abstract":"This paper presents an RF-to-DC energy harvester in the Wi-Fi band. The energy harvester is meant to charge the 1.2V battery of the wireless sensor node device. The system design consists of three main circuit blocks: A low-dropout (LDO) voltage regulator, a charge control circuit and multistage differential-drive rectifier. The maximum PCE attained by the rectifier alone is 31.43%. The charge control circuit maintains the voltage within 1.3V-l.4V, while the LDO provides a stable and regulated output of 1.2V. The designed energy harvester has a minimum RF input power of −2.04 dBm. The chip layout of the overall design has a dimension of 1.2mm × 1.1mm.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128005825","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055665
S. Dong, Xiaojun Li, Xumin Yu, Yazhou Dona, Hao Cui, T. Cui, Ying Wang, Shuo Liu
Wireless sensor network will find more applications in spacecraft. To power wireless sensors with varied energy requirement, hybrid mode wireless power transmission scheme is proposed in this paper. For sensors of 10 $W$ power dissipation, resonance-based wireless power transfer is employed. For those of a few mW to a few hundreds mW power dissipation, microwave power transmission is recommended and for those of 100 uW or less, microwave power harvesting is suggested. This ensemble can support almost all sensors and act as a baseline for similar applications.
{"title":"Hybrid Mode Wireless Power Transfer for Wireless Sensor Network","authors":"S. Dong, Xiaojun Li, Xumin Yu, Yazhou Dona, Hao Cui, T. Cui, Ying Wang, Shuo Liu","doi":"10.1109/WPTC45513.2019.9055665","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055665","url":null,"abstract":"Wireless sensor network will find more applications in spacecraft. To power wireless sensors with varied energy requirement, hybrid mode wireless power transmission scheme is proposed in this paper. For sensors of 10 $W$ power dissipation, resonance-based wireless power transfer is employed. For those of a few mW to a few hundreds mW power dissipation, microwave power transmission is recommended and for those of 100 uW or less, microwave power harvesting is suggested. This ensemble can support almost all sensors and act as a baseline for similar applications.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125659266","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 : 2019-06-01DOI: 10.1109/WPTC45513.2019.9055602
R. Moffatt, T. Howarth, Connor Gafner, J. Yen, Feng-Kai Chen, Joshua Yu
In this paper, a system is described which is capable of driving an RF current in a large, flexible, resonant wire structure using a distributed RF generator, consisting of multiple phase-locked, Class-E RF generators with Automatic Zero-Voltage Switching (AZVS). This distributed RF generator passively maintains a constant RF current amplitude under varying load conditions, without the need for an active impedance-matching network. In addition, the Automatic Zero-Voltage Switching allows efficient Class-E operation over a range of resonant frequencies. This wire structure may be cut to length and reshaped to fit areas of different size without the need for adaptive impedance-matching. By enabling large volumes of space to be filled with an oscillating magnetic field, the distributed RF generator described in this paper finds immediate application for the purpose of resonant magnetic wireless power transfer in large spaces.
{"title":"A Distributed, Phase-locked, Class-E, RF Generator with Automatic Zero-Voltage Switching","authors":"R. Moffatt, T. Howarth, Connor Gafner, J. Yen, Feng-Kai Chen, Joshua Yu","doi":"10.1109/WPTC45513.2019.9055602","DOIUrl":"https://doi.org/10.1109/WPTC45513.2019.9055602","url":null,"abstract":"In this paper, a system is described which is capable of driving an RF current in a large, flexible, resonant wire structure using a distributed RF generator, consisting of multiple phase-locked, Class-E RF generators with Automatic Zero-Voltage Switching (AZVS). This distributed RF generator passively maintains a constant RF current amplitude under varying load conditions, without the need for an active impedance-matching network. In addition, the Automatic Zero-Voltage Switching allows efficient Class-E operation over a range of resonant frequencies. This wire structure may be cut to length and reshaped to fit areas of different size without the need for adaptive impedance-matching. By enabling large volumes of space to be filled with an oscillating magnetic field, the distributed RF generator described in this paper finds immediate application for the purpose of resonant magnetic wireless power transfer in large spaces.","PeriodicalId":148719,"journal":{"name":"2019 IEEE Wireless Power Transfer Conference (WPTC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115846962","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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