Pub Date : 2013-05-15DOI: 10.1109/WPT.2013.6556905
S. Wielandt, N. Stevens
In the design process of inductive wireless power systems, the quality factors of transmitter and receiver coils play an important role in the optimization of the link efficiency. In this work, the experimental evaluation of the quality factor of several commercially available transmitter and receiver coils is performed. The influence on the Q-factor of the following design choices is evaluated: an alignment aid magnet in the transmitter coil, the presence of ferrite at the receiver coil, electrical screening at both the transmitter and receiver coil and finally the effect of the proximity of the transmitter and receiver. The results of this research provide a clear overview of the impact of the studied magnetic design choices.
{"title":"Influence of magnetic design choices on the quality factor of off-the-shelf wireless power transmitter and receiver coils","authors":"S. Wielandt, N. Stevens","doi":"10.1109/WPT.2013.6556905","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556905","url":null,"abstract":"In the design process of inductive wireless power systems, the quality factors of transmitter and receiver coils play an important role in the optimization of the link efficiency. In this work, the experimental evaluation of the quality factor of several commercially available transmitter and receiver coils is performed. The influence on the Q-factor of the following design choices is evaluated: an alignment aid magnet in the transmitter coil, the presence of ferrite at the receiver coil, electrical screening at both the transmitter and receiver coil and finally the effect of the proximity of the transmitter and receiver. The results of this research provide a clear overview of the impact of the studied magnetic design choices.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"51 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126936238","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556888
Sushia Rahimizadeh, S. Korhummel, Benjamin Kaslon, Z. Popovic
This paper presents a method for wireless powering of multiple electronic devices placed in an over-moded 2.2-GHz shielded microwave cavity using watt-level high-efficiency sources. Two transmitters based on a 77% efficient pHEMT PA to feed the cavity incoherently via strategically placed microstrip probes. The field patterns inside the cavity result from multiple excited modes ensuring a relatively uniform power density. Narrowband frequency modulation of the sources further improves uniformity. Each electronic device contains a rectenna, power management circuitry, and a rechargeable battery. A microcontroller performs power management and the available battery power is monitored using a low-power 900-MHz transceiver and communicated through a separate monopole probe and displayed external to the cavity. The approach is scalable in terms of power level, field profile, number of devices and overall size. Applications include personal electronics, powering of toys and powering of products in storage crates.
{"title":"Scalable adaptive wireless powering of multiple electronic devices in an over-moded cavity","authors":"Sushia Rahimizadeh, S. Korhummel, Benjamin Kaslon, Z. Popovic","doi":"10.1109/WPT.2013.6556888","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556888","url":null,"abstract":"This paper presents a method for wireless powering of multiple electronic devices placed in an over-moded 2.2-GHz shielded microwave cavity using watt-level high-efficiency sources. Two transmitters based on a 77% efficient pHEMT PA to feed the cavity incoherently via strategically placed microstrip probes. The field patterns inside the cavity result from multiple excited modes ensuring a relatively uniform power density. Narrowband frequency modulation of the sources further improves uniformity. Each electronic device contains a rectenna, power management circuitry, and a rechargeable battery. A microcontroller performs power management and the available battery power is monitored using a low-power 900-MHz transceiver and communicated through a separate monopole probe and displayed external to the cavity. The approach is scalable in terms of power level, field profile, number of devices and overall size. Applications include personal electronics, powering of toys and powering of products in storage crates.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130559731","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556875
M. Virili, F. Alimenti, L. Roselli, P. Mezzanotte, M. Dionigi
In this article a paper-based contactless frequency doubler for harmonic RFID applications is described, fabricated and measured. The doubler, realized on paper substrate, generates the harmonic signal only by means of a Schottky diode. The fundamental and harmonic frequencies are wirelessly transferred to and from the doubler by coupled aerial resonators. The system operates at 7.5 and 15 MHz and these frequencies are chosen, without lack of generality, to accomplish for the future realization of a fully organic frequency doubler exploiting paper printed coils and organic diode (pentacene based), the present frequency limit of which is nowadays around 15 MHz. This perspective realization constrained also the geometry of the planar resonators that, although the diode at this level of the development is a conventional lumped one, are suited to host pentacene depositions and organic diode electrodes.
{"title":"Organic frequency doubler RFID tag exploiting 7.5-MHz wireless power transfer","authors":"M. Virili, F. Alimenti, L. Roselli, P. Mezzanotte, M. Dionigi","doi":"10.1109/WPT.2013.6556875","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556875","url":null,"abstract":"In this article a paper-based contactless frequency doubler for harmonic RFID applications is described, fabricated and measured. The doubler, realized on paper substrate, generates the harmonic signal only by means of a Schottky diode. The fundamental and harmonic frequencies are wirelessly transferred to and from the doubler by coupled aerial resonators. The system operates at 7.5 and 15 MHz and these frequencies are chosen, without lack of generality, to accomplish for the future realization of a fully organic frequency doubler exploiting paper printed coils and organic diode (pentacene based), the present frequency limit of which is nowadays around 15 MHz. This perspective realization constrained also the geometry of the planar resonators that, although the diode at this level of the development is a conventional lumped one, are suited to host pentacene depositions and organic diode electrodes.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"262 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123018740","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556885
A. Georgiadis, A. Collado
The use of mode locking phenomena in coupled oscillator arrays is exploited in order to generate multitone signals in an easy manner compared to existing multitone signal generation schemes. The generated multitone signals can be used in wireless power transmission towards improving the RF to DC conversion efficiency in rectifier circuits. Here a mode-locked signal is generated around 900 MHz using an array of two coupled oscillators. The performance of a rectifier circuit in terms of RF to DC conversion efficiency is evaluated using a one tone signal and using the generated mode-locked signal showing improved performance when using the mode-locked one.
{"title":"Mode locked oscillator arrays for efficient wireless power transmission","authors":"A. Georgiadis, A. Collado","doi":"10.1109/WPT.2013.6556885","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556885","url":null,"abstract":"The use of mode locking phenomena in coupled oscillator arrays is exploited in order to generate multitone signals in an easy manner compared to existing multitone signal generation schemes. The generated multitone signals can be used in wireless power transmission towards improving the RF to DC conversion efficiency in rectifier circuits. Here a mode-locked signal is generated around 900 MHz using an array of two coupled oscillators. The performance of a rectifier circuit in terms of RF to DC conversion efficiency is evaluated using a one tone signal and using the generated mode-locked signal showing improved performance when using the mode-locked one.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"265 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115237545","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556874
V. Camarchia, E. Cipriani, P. Colantonio, G. Ghione, F. Giannini, M. Pirola, R. Quaglia
In this paper we discuss the advantages offered by GaN HEMT technology in the design of narrow- and wideband high efficiency power amplifiers. On one side, we focus on the possibility of applying second harmonic tuning techniques without degradation of power performances, thanks to the GaN devices' high breakdown voltage. On the other hand, we discuss the impact of the high power density and consequent size reduction in GaN devices for the design of wideband power amplifiers. Three design examples are shown, to enforce the given considerations.
{"title":"Advanced GaN-based high frequency power amplifiers","authors":"V. Camarchia, E. Cipriani, P. Colantonio, G. Ghione, F. Giannini, M. Pirola, R. Quaglia","doi":"10.1109/WPT.2013.6556874","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556874","url":null,"abstract":"In this paper we discuss the advantages offered by GaN HEMT technology in the design of narrow- and wideband high efficiency power amplifiers. On one side, we focus on the possibility of applying second harmonic tuning techniques without degradation of power performances, thanks to the GaN devices' high breakdown voltage. On the other hand, we discuss the impact of the high power density and consequent size reduction in GaN devices for the design of wideband power amplifiers. Three design examples are shown, to enforce the given considerations.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114695467","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556914
H. Sakaki, S. Yoshida, K. Nishikawa, S. Kawasaki
This paper analyzes RF-DC conversion efficiency in a rectifier, which receives FSK modulated signal. To clarify the degradation of the RF-DC conversion efficiency, a bridge-type rectifier, which employs four diodes, a 180-degree hybrid, and matching circuits, is investigated due to its broadband operation. The simulation results show the degradation is mainly caused by mixing operations with various frequency signals on the diodes used. Compared with conversion efficiency of the rectifier at the CW input signal operation, it is found that the efficiency degrades one-third when a FSK modulated signal is received.
{"title":"Analysis of rectifier operation with FSK modulated input signal","authors":"H. Sakaki, S. Yoshida, K. Nishikawa, S. Kawasaki","doi":"10.1109/WPT.2013.6556914","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556914","url":null,"abstract":"This paper analyzes RF-DC conversion efficiency in a rectifier, which receives FSK modulated signal. To clarify the degradation of the RF-DC conversion efficiency, a bridge-type rectifier, which employs four diodes, a 180-degree hybrid, and matching circuits, is investigated due to its broadband operation. The simulation results show the degradation is mainly caused by mixing operations with various frequency signals on the diodes used. Compared with conversion efficiency of the rectifier at the CW input signal operation, it is found that the efficiency degrades one-third when a FSK modulated signal is received.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116127947","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556870
K. Miwa, H. Mori, N. Kikuma
A two-dimensional transmitting coil array is used to expand receiving area in wireless power transfer with magnetically coupled resonance and the effect of the array is discussed in this paper. The transmitting coil array has more than one resonant frequency due to mutual couplings between transmitting coils. Therefore, we propose a method of designing the receiving coil to keep high transmission efficiency in wider area. The computer analysis shows the improvement of transmission efficiency of the proposed method.
{"title":"A consideration of efficiency improvement of transmitting coil array in wireless power transfer with magnetically coupled resonance","authors":"K. Miwa, H. Mori, N. Kikuma","doi":"10.1109/WPT.2013.6556870","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556870","url":null,"abstract":"A two-dimensional transmitting coil array is used to expand receiving area in wireless power transfer with magnetically coupled resonance and the effect of the array is discussed in this paper. The transmitting coil array has more than one resonant frequency due to mutual couplings between transmitting coils. Therefore, we propose a method of designing the receiving coil to keep high transmission efficiency in wider area. The computer analysis shows the improvement of transmission efficiency of the proposed method.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121684766","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556893
Ricardo Gonalves, João Reis, Emanuel Santana, N. Carvalho, P. Pinho, L. Roselli
In this paper the use of Wireless Power Transmission is employed to power up ID sensors located below a ceramic tile. The system developed with this technique allows the implementation of a very low cost indoor localization system based on RFID. This passive sensor identification is then transmitted through a SimpliciTy connection to a database, where a location algorithm is implemented. The system was built and tested in a test bed environment with satisfactory results.
{"title":"Smart floor: Indoor navigation based on RFID","authors":"Ricardo Gonalves, João Reis, Emanuel Santana, N. Carvalho, P. Pinho, L. Roselli","doi":"10.1109/WPT.2013.6556893","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556893","url":null,"abstract":"In this paper the use of Wireless Power Transmission is employed to power up ID sensors located below a ceramic tile. The system developed with this technique allows the implementation of a very low cost indoor localization system based on RFID. This passive sensor identification is then transmitted through a SimpliciTy connection to a database, where a location algorithm is implemented. The system was built and tested in a test bed environment with satisfactory results.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122105861","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556892
Gi-bum Lee, Ho-Yeong Gwak, Young-Sik Kim, W. Park
This paper presents a system that supplies power to a rotating spindle's diagnostic sensor using wireless power transfer technology based on electromagnetic coupled resonance and gauges strain experienced by the spindle. In order to transfer power to the spindle's sensor through the wireless power system, we attached power receiving coils to the spindle at 120 degree intervals and fixed the power transmitting coils to the ground at 60 degree intervals. We used a resonance frequency of 14.32MHz for wireless power transfer; and an interval of 30cm was maintained between the transmitting and receiving coils. The wireless power transfer system to diagnose a rotating spindle was applied at an industrial site, and demonstrated its applicability.
{"title":"Wireless power transfer system for diagnostic sensor on rotating spindle","authors":"Gi-bum Lee, Ho-Yeong Gwak, Young-Sik Kim, W. Park","doi":"10.1109/WPT.2013.6556892","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556892","url":null,"abstract":"This paper presents a system that supplies power to a rotating spindle's diagnostic sensor using wireless power transfer technology based on electromagnetic coupled resonance and gauges strain experienced by the spindle. In order to transfer power to the spindle's sensor through the wireless power system, we attached power receiving coils to the spindle at 120 degree intervals and fixed the power transmitting coils to the ground at 60 degree intervals. We used a resonance frequency of 14.32MHz for wireless power transfer; and an interval of 30cm was maintained between the transmitting and receiving coils. The wireless power transfer system to diagnose a rotating spindle was applied at an industrial site, and demonstrated its applicability.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127629454","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556910
T. Higashino, Ma Ziji, M. Okada, Y. Tatsuta, Yoshikazu Goto, Yoshinori Tsuruda, R. Tanaka
This paper newly proposes a configuration of magnetic coupling in wireless power transform using parallel line power feeder. Previous researches mentioned that coil design and optimization of circuit parameters are necessary for strong magnetic coupled resonance. Then, these constraints prevent expansion of coverage area of wireless power transfer to electric portable devices, and electric vehicles. In order to make breakthrough against these limitations, this paper introduces parallel line as a feeder. The frequency of the electromagnetic wave is selected at 13.56 [MHz] in high frequency (HF) band, which is suitable for strong magnetic coupled resonance. Fundamental characteristics are evaluated by using equivalent circuits which are referred to the previous works. Theoretical analysis asserts that impedance transform is necessary in a power source and load circuits. Computer simulation evaluates a mutual inductance between primary and secondary coils, and optimum value of load resistance is clarified. Finally, input impedance and S-parameter are evaluated when power source circuit and feeder circuit are magnetic coupled resonance, these results imply that enhancement of power transfer efficiency is a further study.
{"title":"A new configuration of magnetic coupled power transfer using parallel line feeder","authors":"T. Higashino, Ma Ziji, M. Okada, Y. Tatsuta, Yoshikazu Goto, Yoshinori Tsuruda, R. Tanaka","doi":"10.1109/WPT.2013.6556910","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556910","url":null,"abstract":"This paper newly proposes a configuration of magnetic coupling in wireless power transform using parallel line power feeder. Previous researches mentioned that coil design and optimization of circuit parameters are necessary for strong magnetic coupled resonance. Then, these constraints prevent expansion of coverage area of wireless power transfer to electric portable devices, and electric vehicles. In order to make breakthrough against these limitations, this paper introduces parallel line as a feeder. The frequency of the electromagnetic wave is selected at 13.56 [MHz] in high frequency (HF) band, which is suitable for strong magnetic coupled resonance. Fundamental characteristics are evaluated by using equivalent circuits which are referred to the previous works. Theoretical analysis asserts that impedance transform is necessary in a power source and load circuits. Computer simulation evaluates a mutual inductance between primary and secondary coils, and optimum value of load resistance is clarified. Finally, input impedance and S-parameter are evaluated when power source circuit and feeder circuit are magnetic coupled resonance, these results imply that enhancement of power transfer efficiency is a further study.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121551433","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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