Pub Date : 2011-03-07DOI: 10.1109/RWS.2011.5725423
Ning Zhu, Kihun Chang, Mingguang Tuo, Peng Jin, H. Xin, R. Ziolkowski
A 1.575 GHz rectenna has been developed for low input power operation. The rectenna incorporates a high efficiency, electrically small, metamaterial-inspired near field resonant parasitic antenna, and a Schottky diode that has a low built-in voltage, and a resistor as the load. The rectenna was analyzed with the Harmonic Balance method provided by the Advanced Design System (ADS). The measurement results show that the output efficiency of the rectenna with the resistive load is 34.1% and the voltage across the resistor is 0.73 V when the power delivered to the antenna is 1.0 mW (0.0 dBm). The predicted and measured results are in reasonable agreement.
{"title":"Design of a high-efficiency rectenna for 1.575 GHz wireless low power transmission","authors":"Ning Zhu, Kihun Chang, Mingguang Tuo, Peng Jin, H. Xin, R. Ziolkowski","doi":"10.1109/RWS.2011.5725423","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725423","url":null,"abstract":"A 1.575 GHz rectenna has been developed for low input power operation. The rectenna incorporates a high efficiency, electrically small, metamaterial-inspired near field resonant parasitic antenna, and a Schottky diode that has a low built-in voltage, and a resistor as the load. The rectenna was analyzed with the Harmonic Balance method provided by the Advanced Design System (ADS). The measurement results show that the output efficiency of the rectenna with the resistive load is 34.1% and the voltage across the resistor is 0.73 V when the power delivered to the antenna is 1.0 mW (0.0 dBm). The predicted and measured results are in reasonable agreement.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122434459","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 : 2011-03-07DOI: 10.1109/RWS.2011.5725491
H. Schantz, Christian Weil, Alfred H. Unden
We provide results and error analysis for over four hundred individual measurements of a Near-Field Electromagnetic Ranging (NFER®) Real-Time Location System (RTLS). The system operated over ranges from 1.41m to 23.4m and the bulk of the points were taken “through wall” in a non-line-of-sight configuration. We break the error down into orthogonal range and transverse components in order to assess the relative impact of range versus bearing errors in the system. We found an average range error of 34.0cm, an average transverse error of 35.5cm, and a corresponding total location error of 55.1cm. These error values are on a per receiver basis, and will tend to reduce by 1 / √N as measurements from N receivers are combined to yield a solution.
{"title":"Characterization of error in a Near-Field Electromagnetic Ranging (NFER) Real-Time Location System (RTLS)","authors":"H. Schantz, Christian Weil, Alfred H. Unden","doi":"10.1109/RWS.2011.5725491","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725491","url":null,"abstract":"We provide results and error analysis for over four hundred individual measurements of a Near-Field Electromagnetic Ranging (NFER®) Real-Time Location System (RTLS). The system operated over ranges from 1.41m to 23.4m and the bulk of the points were taken “through wall” in a non-line-of-sight configuration. We break the error down into orthogonal range and transverse components in order to assess the relative impact of range versus bearing errors in the system. We found an average range error of 34.0cm, an average transverse error of 35.5cm, and a corresponding total location error of 55.1cm. These error values are on a per receiver basis, and will tend to reduce by 1 / √N as measurements from N receivers are combined to yield a solution.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116379551","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 : 2011-03-07DOI: 10.1109/RWS.2011.5725440
Hiroyuki Yojima, Yuto Tanaka, Y. Umeda, O. Takyu, M. Nakayama, Kazunari Kodama
In this paper, we discuss the change of read range between a UHF passive RFID tag and a reader when a tag is close to another tag. The read range is determined by the strength of the forward and reverse link. These links are identified by comparing the calculated received and reflected power with the measured dependence of the read range on the distance between close tags. We developed a system to measure the tag IC impedance in operation. The accuracy is assured by the short-open-load (SOL) one port calibration. The reader and tag's change of received power is calculated according to the change of tag IC impedance due to the closeness of the tags. As a result, it becomes clear that the read range is determined by the reverse link finally.
{"title":"Analysis of read range for UHF passive RFID tags in close proximity with dynamic impedance measurement of tag ICs","authors":"Hiroyuki Yojima, Yuto Tanaka, Y. Umeda, O. Takyu, M. Nakayama, Kazunari Kodama","doi":"10.1109/RWS.2011.5725440","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725440","url":null,"abstract":"In this paper, we discuss the change of read range between a UHF passive RFID tag and a reader when a tag is close to another tag. The read range is determined by the strength of the forward and reverse link. These links are identified by comparing the calculated received and reflected power with the measured dependence of the read range on the distance between close tags. We developed a system to measure the tag IC impedance in operation. The accuracy is assured by the short-open-load (SOL) one port calibration. The reader and tag's change of received power is calculated according to the change of tag IC impedance due to the closeness of the tags. As a result, it becomes clear that the read range is determined by the reverse link finally.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128655762","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 : 2011-03-07DOI: 10.1109/RWS.2011.5725420
K. Miyanaga, W. Lee, Akira Kato, S. Hirano, K. Ishida
In recent 3G cellular handset, small-sized RF is strongly demanded. Polar modulation is one of the candidates to eliminate peripheral RF components. To apply polar modulation for wideband application, high linearity of phase modulator is required. In this paper, VCO gain nonlinearity calibration for phase modulator is proposed. The proposed procedure can calibrate the nonlinearity including frequency offset and frequency drift, which have an impact on EVM performances. Simulation and measurement results show the proposal can achieve excellent EVM of 5.8%.
{"title":"VCO gain nonlinearity calibration with frequency offset/drift compensation for 3G/GSM/EDGE polar modulation transmitter","authors":"K. Miyanaga, W. Lee, Akira Kato, S. Hirano, K. Ishida","doi":"10.1109/RWS.2011.5725420","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725420","url":null,"abstract":"In recent 3G cellular handset, small-sized RF is strongly demanded. Polar modulation is one of the candidates to eliminate peripheral RF components. To apply polar modulation for wideband application, high linearity of phase modulator is required. In this paper, VCO gain nonlinearity calibration for phase modulator is proposed. The proposed procedure can calibrate the nonlinearity including frequency offset and frequency drift, which have an impact on EVM performances. Simulation and measurement results show the proposal can achieve excellent EVM of 5.8%.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121379350","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 : 2011-03-07DOI: 10.1109/RWS.2011.5725445
T. Papatheologou, A. B. Smolders, U. Johannsen
Antenna integration is a relative new concept for the miniaturization of Radio Frequency (RF) transceivers where a key problem is to achieve a small size at low cost. Traditional solutions, using ceramic materials, are too costly. Additionally, the current trend in RFID applications is the development of smaller and cheaper tags. In this paper, we present an elegant and low-cost Antenna-in-Package (AiP) solution for RFID tag applications. A printed dipole antenna that integrates the balun function with improved filtering characteristics is designed on a low-cost dielectric material. Simulation and measurement results verify the performance of the proposed antenna.
{"title":"A hairpin Antenna-in-Package concept for RFID tag applications","authors":"T. Papatheologou, A. B. Smolders, U. Johannsen","doi":"10.1109/RWS.2011.5725445","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725445","url":null,"abstract":"Antenna integration is a relative new concept for the miniaturization of Radio Frequency (RF) transceivers where a key problem is to achieve a small size at low cost. Traditional solutions, using ceramic materials, are too costly. Additionally, the current trend in RFID applications is the development of smaller and cheaper tags. In this paper, we present an elegant and low-cost Antenna-in-Package (AiP) solution for RFID tag applications. A printed dipole antenna that integrates the balun function with improved filtering characteristics is designed on a low-cost dielectric material. Simulation and measurement results verify the performance of the proposed antenna.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126232300","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 : 2011-03-07DOI: 10.1109/RWS.2011.5725475
Andree Fouque, F. Rivet, François Fadhuile, Y. Deval, J. Bégueret, D. Belot
This article provides an overview of the Digital Video Broadcasting - Satellite (DVB-S) specifications and the context of its extension to mobility. Different ways for receiving digital television on mobile devices are summarized. Then, the overall demonstrator from the antenna to the baseband signal processing is presented. Some attention is paid to the analog channel selection and QPSK frequency demodulation. The noise issues are deeply developed in this paper. Finally, a new technique (the “Wipe-off technique”) for improving noise performances is suggested. It is claimed that DVB-S fulfills the requirements to extend the fixed reception toward mobility in Ku-band with large area coverage, good quality of the received signals, reduced total network cost and low power consumption thanks to a full analog signal processing channel selection.
{"title":"A low power digitally-enhanced SASP-based receiver architecture for mobile DVB-S applications in the Ku-band (10.7–12.75 GHz)","authors":"Andree Fouque, F. Rivet, François Fadhuile, Y. Deval, J. Bégueret, D. Belot","doi":"10.1109/RWS.2011.5725475","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725475","url":null,"abstract":"This article provides an overview of the Digital Video Broadcasting - Satellite (DVB-S) specifications and the context of its extension to mobility. Different ways for receiving digital television on mobile devices are summarized. Then, the overall demonstrator from the antenna to the baseband signal processing is presented. Some attention is paid to the analog channel selection and QPSK frequency demodulation. The noise issues are deeply developed in this paper. Finally, a new technique (the “Wipe-off technique”) for improving noise performances is suggested. It is claimed that DVB-S fulfills the requirements to extend the fixed reception toward mobility in Ku-band with large area coverage, good quality of the received signals, reduced total network cost and low power consumption thanks to a full analog signal processing channel selection.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125971628","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 : 2011-03-07DOI: 10.1109/RWS.2011.5725452
J. Schonberger, Renee Strouts, W. Kuhn
Modern wireless products including software-defined and cognitive radios (SDR/CR) require variable bandwidth technologies to address multiple modulation standards. This paper shows that Q-enhanced filtering at the intermediate frequency of a superheterodyne receiver can support this need. We present an automatically tuned, coupled-resonator QE filter operating at 450 MHz, with variable bandwidth capability, a 14 dB noise figure, and up to 140 dB/Hz dynamic range. The problem of tuning the filter in the face of environmental changes is solved with a low-complexity algorithm and minimal additional circuitry. The associated problem of correcting passband asymmetry is also addressed and a 2-pole design tuned for 10 and 20 MHz bandwidths is shown to maintain flatness to within 0.5 dB from 25 to 55 degrees C.
{"title":"Automatically tuned, variable bandwidth, Q-enhanced if bandpass filters","authors":"J. Schonberger, Renee Strouts, W. Kuhn","doi":"10.1109/RWS.2011.5725452","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725452","url":null,"abstract":"Modern wireless products including software-defined and cognitive radios (SDR/CR) require variable bandwidth technologies to address multiple modulation standards. This paper shows that Q-enhanced filtering at the intermediate frequency of a superheterodyne receiver can support this need. We present an automatically tuned, coupled-resonator QE filter operating at 450 MHz, with variable bandwidth capability, a 14 dB noise figure, and up to 140 dB/Hz dynamic range. The problem of tuning the filter in the face of environmental changes is solved with a low-complexity algorithm and minimal additional circuitry. The associated problem of correcting passband asymmetry is also addressed and a 2-pole design tuned for 10 and 20 MHz bandwidths is shown to maintain flatness to within 0.5 dB from 25 to 55 degrees C.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129040682","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 : 2009-05-12DOI: 10.1109/RWS.2011.5725448
Ioan Burciu, M. Gautier, G. Villemaud, J. Verdier
In this paper, a candidate architecture for LTE-Advanced receiver is proposed. Based on the combination of MIMO techniques and flexible spectrum access, LTE-Advanced terminals will require the increasing of the analog front-end complexity. To reduce the complexity of the analog front-end, an innovative architecture based on the merge between the double IQ and the code multiplexing structures is proposed. Simulation and measurement results show that, in a Gaussian case, the bit error rate is similar when using the proposed architecture and the state of the art front-end stack-up structure. A complexity evaluation study reveals significantly reduced power consumption of the proposed single front-end architecture.
{"title":"Candidate architecture for MIMO LTE-Advanced receivers with multiple channels capabilities and reduced complexity and cost","authors":"Ioan Burciu, M. Gautier, G. Villemaud, J. Verdier","doi":"10.1109/RWS.2011.5725448","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725448","url":null,"abstract":"In this paper, a candidate architecture for LTE-Advanced receiver is proposed. Based on the combination of MIMO techniques and flexible spectrum access, LTE-Advanced terminals will require the increasing of the analog front-end complexity. To reduce the complexity of the analog front-end, an innovative architecture based on the merge between the double IQ and the code multiplexing structures is proposed. Simulation and measurement results show that, in a Gaussian case, the bit error rate is similar when using the proposed architecture and the state of the art front-end stack-up structure. A complexity evaluation study reveals significantly reduced power consumption of the proposed single front-end architecture.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114926129","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 : 1900-01-01DOI: 10.1109/RWS.2011.5725450
K. Zhu, S. Islam, J. Holleman, S. Yuan
In this paper, we propose a low-power dual-modulus injection-locked frequency divider (ILFD) based on a relaxation oscillator, which is shown to be suitable for injection-locked frequency divider design. By varying the center frequency based on the modulus control bit, the divider can achieve different division ratios. For validation, two dual-modulus ILFDs which can achieve different division ratios such 2/3, 3/4, 4/5 are simulated in a 90 nm CMOS process technology with two tuning methods. The divider covers the frequency range of the medical implant communications service (MICS) and the industrial, scientific and medical (ISM) frequency bands for low power applications.
{"title":"A low-power dual-modulus injection-locked frequency divider for medical implants","authors":"K. Zhu, S. Islam, J. Holleman, S. Yuan","doi":"10.1109/RWS.2011.5725450","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725450","url":null,"abstract":"In this paper, we propose a low-power dual-modulus injection-locked frequency divider (ILFD) based on a relaxation oscillator, which is shown to be suitable for injection-locked frequency divider design. By varying the center frequency based on the modulus control bit, the divider can achieve different division ratios. For validation, two dual-modulus ILFDs which can achieve different division ratios such 2/3, 3/4, 4/5 are simulated in a 90 nm CMOS process technology with two tuning methods. The divider covers the frequency range of the medical implant communications service (MICS) and the industrial, scientific and medical (ISM) frequency bands for low power applications.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116606915","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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