Pub Date : 2011-10-24DOI: 10.1109/ICUWB.2011.6058891
Francesco Guidi, Nicoló Decarli, D. Dardari, C. Roblin, A. Sibille
Future advanced radio-frequency identification (RFID) systems are expected to provide both identification and high-definition localization of objects with improved reliability and security while maintaining low power consumption and cost. Ultrawide bandwidth (UWB) technology is a promising solution for next generation RFID systems to overcome most of the limitations of current narrow bandwidth RFID technology such as: reduced area coverage, insufficient ranging resolution for accurate localization, sensitivity to interference and scarce multiple access capability. In this paper, the UWB technology is applied to semi-passive RFID relying on backscatter modulation. The potential performance of backscatter RFID communication using UWB signals is investigated in terms of clutter suppression and multiple access capability using both simulated and experimental data.
{"title":"Performance of UWB backscatter modulation in multi-tag RFID scenario using experimental data","authors":"Francesco Guidi, Nicoló Decarli, D. Dardari, C. Roblin, A. Sibille","doi":"10.1109/ICUWB.2011.6058891","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058891","url":null,"abstract":"Future advanced radio-frequency identification (RFID) systems are expected to provide both identification and high-definition localization of objects with improved reliability and security while maintaining low power consumption and cost. Ultrawide bandwidth (UWB) technology is a promising solution for next generation RFID systems to overcome most of the limitations of current narrow bandwidth RFID technology such as: reduced area coverage, insufficient ranging resolution for accurate localization, sensitivity to interference and scarce multiple access capability. In this paper, the UWB technology is applied to semi-passive RFID relying on backscatter modulation. The potential performance of backscatter RFID communication using UWB signals is investigated in terms of clutter suppression and multiple access capability using both simulated and experimental data.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131215552","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 : 2011-10-24DOI: 10.1109/ICUWB.2011.6058842
T. Sakamoto, Yuji Matsuki, Toru Sato
Ultra wideband (UWB) radar systems are a promising technology for surveillance systems. Many of the existing imaging algorithms are based on large-scale antenna arrays that are not necessarily practical because of their complexity and high cost. To resolve this difficulty, we had previously proposed an UWB radar imaging algorithm that estimates unknown 2-dimensional target shapes and motions using only three antennas. In this paper, we extend this method so that 3-dimensional target shapes and motions can be estimated. Some numerical simulations establish that the proposed method can accurately estimate the target shape even under extreme conditions.
{"title":"Three-dimensional imaging of a moving target using an ultra-wideband radar with five antennas","authors":"T. Sakamoto, Yuji Matsuki, Toru Sato","doi":"10.1109/ICUWB.2011.6058842","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058842","url":null,"abstract":"Ultra wideband (UWB) radar systems are a promising technology for surveillance systems. Many of the existing imaging algorithms are based on large-scale antenna arrays that are not necessarily practical because of their complexity and high cost. To resolve this difficulty, we had previously proposed an UWB radar imaging algorithm that estimates unknown 2-dimensional target shapes and motions using only three antennas. In this paper, we extend this method so that 3-dimensional target shapes and motions can be estimated. Some numerical simulations establish that the proposed method can accurately estimate the target shape even under extreme conditions.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129241816","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 : 2011-10-24DOI: 10.1109/ICUWB.2011.6058879
Tamás Krébesz, G. Kolumbán, C. M. Józsa
The radio coverage is limited by the energy per bit transmitted. UWB pulses used in impulse radio are extremely short and, consequently, carry a very little energy per bit that results in an unacceptable short radio coverage. The energy per bit could be increased by enlarging the duration of UWB carrier pulse, however, this solution cannot be used because the correlation of received pulse envelope with a reference pulse defined in IEEE Std. 802.15.4a has to exceed a prescribed value. To solve the problem the pulse compression approach is proposed here where the duration of radiated UWB carrier pulse is enlarged considerably to get enough energy per bit and the duration of received UWB pulse is compressed by a matched filter at the receiver. The increased energy per bit increases the radio coverage and the envelope of compressed UWB pulse satisfies the requirements of IEEE Std. 802.15.4a. The gains in energy per bit are about 18 dB and 22 dB when the UWB pulse durations are set to 100 ns and 300 ns, respectively.
{"title":"Exploiting pulse compression to generate an IEEE 802.15.4a-compliant UWB IR pulse with increased energy per bit","authors":"Tamás Krébesz, G. Kolumbán, C. M. Józsa","doi":"10.1109/ICUWB.2011.6058879","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058879","url":null,"abstract":"The radio coverage is limited by the energy per bit transmitted. UWB pulses used in impulse radio are extremely short and, consequently, carry a very little energy per bit that results in an unacceptable short radio coverage. The energy per bit could be increased by enlarging the duration of UWB carrier pulse, however, this solution cannot be used because the correlation of received pulse envelope with a reference pulse defined in IEEE Std. 802.15.4a has to exceed a prescribed value. To solve the problem the pulse compression approach is proposed here where the duration of radiated UWB carrier pulse is enlarged considerably to get enough energy per bit and the duration of received UWB pulse is compressed by a matched filter at the receiver. The increased energy per bit increases the radio coverage and the envelope of compressed UWB pulse satisfies the requirements of IEEE Std. 802.15.4a. The gains in energy per bit are about 18 dB and 22 dB when the UWB pulse durations are set to 100 ns and 300 ns, respectively.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124565212","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 : 2011-10-24DOI: 10.1109/ICUWB.2011.6058839
Junyang Shen, A. Molisch
Ultra-wideband (UWB) radios offer highly accurate ranging, i.e., measurement of signal travel time. This is important for positioning (localization), in particular in indoor environments, where GPS is not available. This paper considers UWB-based positioning of passive objects, where one transmitter and multiple, distributed, receivers are employed. We consider the case where the transmitter and receivers can be synchronized, so that time-of-arrival (TOA) instead of time-difference-of-arrival (TDOA) information can be utilized. Assuming Gaussian errors for the range estimates, we propose a novel, Two-Step, Expectation Maximization (TSEM) based algorithm for the localization of the passive object. This algorithm achieves the Cramer-Rao Lower Bound (CRLB) of TOA algorithms. Simulation results show that the error variance of TSEM is much lower (often 30 dB) than that of the existing, TDOA-based, algorithms.
{"title":"Passive location estimation using TOA measurements","authors":"Junyang Shen, A. Molisch","doi":"10.1109/ICUWB.2011.6058839","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058839","url":null,"abstract":"Ultra-wideband (UWB) radios offer highly accurate ranging, i.e., measurement of signal travel time. This is important for positioning (localization), in particular in indoor environments, where GPS is not available. This paper considers UWB-based positioning of passive objects, where one transmitter and multiple, distributed, receivers are employed. We consider the case where the transmitter and receivers can be synchronized, so that time-of-arrival (TOA) instead of time-difference-of-arrival (TDOA) information can be utilized. Assuming Gaussian errors for the range estimates, we propose a novel, Two-Step, Expectation Maximization (TSEM) based algorithm for the localization of the passive object. This algorithm achieves the Cramer-Rao Lower Bound (CRLB) of TOA algorithms. Simulation results show that the error variance of TSEM is much lower (often 30 dB) than that of the existing, TDOA-based, algorithms.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121455788","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 : 2011-10-24DOI: 10.1109/ICUWB.2011.6058811
Qin Zhou, Z. Zou, F. Jonsson, Lirong Zheng
Impulse Radio Ultra-Wideband (IR-UWB) exhibits strong advantages in low power and low cost applications such as RFID and Wireless Sensor Networks. This paper presents an on-off keying (OOK) based energy detection IR-UWB receiver with focus on the back-end design. In order to optimize the receiver performance according to different multi-path environment, variable integration interval and adaptive threshold optimization are considered in the proposed back-end which is composed by a programmable timing circuit and a reconfigurable baseband processor. The timing circuit is able to generate multi-phased integration windows with wide-range variable integration interval and is implemented in 90 nm CMOS process. Novel schemes on synchronization and optimum threshold estimation are suggested for baseband processing. The proposed synchronization scheme is based on maximum energy variance (between symbol ‘0’ and ‘1’) detection, covering both the pulse level and symbol level synchronization. And the scheme for optimum threshold estimation is based on look up table, enabling low complexity implementation. System simulation with IEEE 802.15.4a channel models shows an appreciable improvement on the bit error rate (BER) performance compared with the conventional scheme.
{"title":"A flexible back-end with optimum threshold estimation for OOK based energy detection IR-UWB receivers","authors":"Qin Zhou, Z. Zou, F. Jonsson, Lirong Zheng","doi":"10.1109/ICUWB.2011.6058811","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058811","url":null,"abstract":"Impulse Radio Ultra-Wideband (IR-UWB) exhibits strong advantages in low power and low cost applications such as RFID and Wireless Sensor Networks. This paper presents an on-off keying (OOK) based energy detection IR-UWB receiver with focus on the back-end design. In order to optimize the receiver performance according to different multi-path environment, variable integration interval and adaptive threshold optimization are considered in the proposed back-end which is composed by a programmable timing circuit and a reconfigurable baseband processor. The timing circuit is able to generate multi-phased integration windows with wide-range variable integration interval and is implemented in 90 nm CMOS process. Novel schemes on synchronization and optimum threshold estimation are suggested for baseband processing. The proposed synchronization scheme is based on maximum energy variance (between symbol ‘0’ and ‘1’) detection, covering both the pulse level and symbol level synchronization. And the scheme for optimum threshold estimation is based on look up table, enabling low complexity implementation. System simulation with IEEE 802.15.4a channel models shows an appreciable improvement on the bit error rate (BER) performance compared with the conventional scheme.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"06 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125614864","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 : 2011-10-24DOI: 10.1109/ICUWB.2011.6058895
Takurou Hozumi, M. Fujii, Yu Watanabe
Ultra-WideBand (UWB) system shares the same frequency band with the other wireless communication systems. It is, however, necessary to detect the presence of the other wireless systems as primary systems in order to avoid interference to them. For this purpose, the energy detection method detects the presence of the primary system based on the observed energy at individual UWB device. On the other hand, in the cooperative-detection method, a master UWB device gathers the received signals from slave UWB devices and detects the presence of the primary system by combining the signals. However, the cooperative method does not consider spacial positions of the UWB devices and the primary system. In this paper, we propose a new detection method based on a combination of the received signals at more than two UWB devices. Although the conventional cooperative-detector provides one result, the proposed detector can provide some results for each UWB device. By computer simulations, we show an availability of the proposed method by comparing with the conventional one.
{"title":"A study on cooperative interference detection for UWB systems","authors":"Takurou Hozumi, M. Fujii, Yu Watanabe","doi":"10.1109/ICUWB.2011.6058895","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058895","url":null,"abstract":"Ultra-WideBand (UWB) system shares the same frequency band with the other wireless communication systems. It is, however, necessary to detect the presence of the other wireless systems as primary systems in order to avoid interference to them. For this purpose, the energy detection method detects the presence of the primary system based on the observed energy at individual UWB device. On the other hand, in the cooperative-detection method, a master UWB device gathers the received signals from slave UWB devices and detects the presence of the primary system by combining the signals. However, the cooperative method does not consider spacial positions of the UWB devices and the primary system. In this paper, we propose a new detection method based on a combination of the received signals at more than two UWB devices. Although the conventional cooperative-detector provides one result, the proposed detector can provide some results for each UWB device. By computer simulations, we show an availability of the proposed method by comparing with the conventional one.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127335522","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 : 2011-10-24DOI: 10.1109/ICUWB.2011.6058923
Seunghyun Oh, D. Wentzloff
In this paper, we present a step recovery diode (SRD) based ultra-wideband (UWB) transmitter. No custom integrated circuits (ICs) are used, and all of the components are commercially available off-the-shelf products, targeting low-cost and fast turn-around. UWB pulses are generated using SRDs, and pulse position modulation (PPM) is implemented by a microcontroller. Detailed analysis and equations for the SRD-based impulse generation are provided and verified with experimental results. This UWB transmitter has a measured full width half maximum (FWHM) pulse width of 213ps, pulse amplitude of 1.6V, and peak power of 17dBm. The data rate is 2.5MHz, which is limited by the maximum clock frequency of the microcontroller. The supply voltage for the entire circuit is 3V, which is compatible with coin batteries. The power consumption of the SRD pulse generator is 57mW, and the total power consumption of the complete transmitter is 70mW.
{"title":"A step recovery diode based UWB transmitter for low-cost impulse generation","authors":"Seunghyun Oh, D. Wentzloff","doi":"10.1109/ICUWB.2011.6058923","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058923","url":null,"abstract":"In this paper, we present a step recovery diode (SRD) based ultra-wideband (UWB) transmitter. No custom integrated circuits (ICs) are used, and all of the components are commercially available off-the-shelf products, targeting low-cost and fast turn-around. UWB pulses are generated using SRDs, and pulse position modulation (PPM) is implemented by a microcontroller. Detailed analysis and equations for the SRD-based impulse generation are provided and verified with experimental results. This UWB transmitter has a measured full width half maximum (FWHM) pulse width of 213ps, pulse amplitude of 1.6V, and peak power of 17dBm. The data rate is 2.5MHz, which is limited by the maximum clock frequency of the microcontroller. The supply voltage for the entire circuit is 3V, which is compatible with coin batteries. The power consumption of the SRD pulse generator is 57mW, and the total power consumption of the complete transmitter is 70mW.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134646026","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 : 2011-10-24DOI: 10.1109/ICUWB.2011.6058905
C. Roblin
The Wireless Body Area Networks technology is a promising candidate for various potential applications in the domains of health, monitoring, sport, etc. The optimization of WBANs at the system level requires an accurate knowledge of the propagation channel which plays a key role on the design of the other layers. The explosive combinatory due to the numerous sources of variability and the diversity of the situations should be reduced to be reasonably analyzed. One way is to try to separate the “on-body” cluster from the “off-body” clusters due to MPCs coming from the surrounding environment. This allows to analyze separately the proper sources of variability (population, postures and movements, antennas, etc.) from the exogenous influence of the environment, reducing considerably the required experimental effort and simplifying the modeling process. It is proposed here to separate the “fine structure” of the Power Delay Profile in three contributions: the “on-body cluster”, a “transition region” dominated by “off-body MPCs” and the superposition of the diffuse scattering tail and possible residual long range coherent clusters. The RMS delay spread statistics is also analyzed, as well as its correlation to the PL.
{"title":"Analysis of the channel power delay profile of WBAN scenarios in various indoor environments","authors":"C. Roblin","doi":"10.1109/ICUWB.2011.6058905","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058905","url":null,"abstract":"The Wireless Body Area Networks technology is a promising candidate for various potential applications in the domains of health, monitoring, sport, etc. The optimization of WBANs at the system level requires an accurate knowledge of the propagation channel which plays a key role on the design of the other layers. The explosive combinatory due to the numerous sources of variability and the diversity of the situations should be reduced to be reasonably analyzed. One way is to try to separate the “on-body” cluster from the “off-body” clusters due to MPCs coming from the surrounding environment. This allows to analyze separately the proper sources of variability (population, postures and movements, antennas, etc.) from the exogenous influence of the environment, reducing considerably the required experimental effort and simplifying the modeling process. It is proposed here to separate the “fine structure” of the Power Delay Profile in three contributions: the “on-body cluster”, a “transition region” dominated by “off-body MPCs” and the superposition of the diffuse scattering tail and possible residual long range coherent clusters. The RMS delay spread statistics is also analyzed, as well as its correlation to the PL.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130975607","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 : 2011-10-24DOI: 10.1109/ICUWB.2011.6058818
K. Kouassi, L. Clavier, I. Doumbia, P. Rolland
A new scheme to enhance the random aspect of information symbols in Time Hopping Pulse Position Modulation is proposed to reduce the catastrophic effect of collisions in multiple access. It is evaluated through analytical expressions and simulations. Multiple access interference modeling methods have been proposed in the recent literature to carry out accurately the bit error performance of these systems. The characteristic function method has been used here to derive the analytical expressions. Monte-Carlo simulations help to confirm the accuracy of the obtained expressions. The performances of this scheme and of the classical case are compared in term of Bit-error rates. The results show that the proposed scheme is a good candidate to enhance MAI avoidance.
{"title":"Multiple-access interference management in TH-PPM UWB systems with pulse width randomisation","authors":"K. Kouassi, L. Clavier, I. Doumbia, P. Rolland","doi":"10.1109/ICUWB.2011.6058818","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058818","url":null,"abstract":"A new scheme to enhance the random aspect of information symbols in Time Hopping Pulse Position Modulation is proposed to reduce the catastrophic effect of collisions in multiple access. It is evaluated through analytical expressions and simulations. Multiple access interference modeling methods have been proposed in the recent literature to carry out accurately the bit error performance of these systems. The characteristic function method has been used here to derive the analytical expressions. Monte-Carlo simulations help to confirm the accuracy of the obtained expressions. The performances of this scheme and of the classical case are compared in term of Bit-error rates. The results show that the proposed scheme is a good candidate to enhance MAI avoidance.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"42 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133217535","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 : 2011-10-24DOI: 10.1109/ICUWB.2011.6058898
S. Hashemi
Cascaded block filters are proposed for ultra-wideband (UWB) applications. This class of microwave bandpass filters (BPF) is based on multilayer ring resonators (MRR) structure. The novelty of this configuration, with respect to MRR, is to improve the selectivity of the filters and introduce high order super-compact circuits. For the first time, lumped-element equivalent circuit models are introduced for both MRR structures and cascaded block filters. The mathematical model derived from the lumped circuit shows a close match with the filters frequency responses. Admittance matrix is derived and given for the analysis. Low-temperature co-fired ceramic (LTCC) is a suitable technology to implement these types of filters. Various prototypes are introduced and their frequency responses are demonstrated using electromagnetic simulation software.
{"title":"Lumped-element equivalent circuit models for multilayer ring resonators filters","authors":"S. Hashemi","doi":"10.1109/ICUWB.2011.6058898","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058898","url":null,"abstract":"Cascaded block filters are proposed for ultra-wideband (UWB) applications. This class of microwave bandpass filters (BPF) is based on multilayer ring resonators (MRR) structure. The novelty of this configuration, with respect to MRR, is to improve the selectivity of the filters and introduce high order super-compact circuits. For the first time, lumped-element equivalent circuit models are introduced for both MRR structures and cascaded block filters. The mathematical model derived from the lumped circuit shows a close match with the filters frequency responses. Admittance matrix is derived and given for the analysis. Low-temperature co-fired ceramic (LTCC) is a suitable technology to implement these types of filters. Various prototypes are introduced and their frequency responses are demonstrated using electromagnetic simulation software.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130414822","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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