Pub Date : 2012-10-01DOI: 10.23919/EUMC.2012.6459079
H. Visser
Approximate or engineering antenna models may be used in a genetic optimization shell to generate initial designs. If necessary, these designs may be used as input in a full-wave analysis program for fine-tuning in a limited number of iterations. Thus, the total design time of an antenna may be reduced by several orders of magnitude.
{"title":"Approximate antenna analysis for design purposes","authors":"H. Visser","doi":"10.23919/EUMC.2012.6459079","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459079","url":null,"abstract":"Approximate or engineering antenna models may be used in a genetic optimization shell to generate initial designs. If necessary, these designs may be used as input in a full-wave analysis program for fine-tuning in a limited number of iterations. Thus, the total design time of an antenna may be reduced by several orders of magnitude.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123487296","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459118
J. Sieiro, J. López-Villegas, M. N. Vidal, J. A. Osorio, T. Carrasco, S. Ahyoune
An ab initio technique for the meshing of planar radiofrequency and microwave circuits is described in this work. It is based on the analytical study of the current crowding phenomena that takes place inside the component. By using the mutual coupling inductive terms between metal strips, the ratio of the AC resistance due to proximity effects over the DC resistance can be evaluated for each metal strip. In such evaluation, it is not required an explicit solution of currents and charges at any part of the circuit. Then, the number of mesh cells assigned to a given metal strip depends on the value of the ratio. This technique is applied to the computation of losses in high Q inductors implemented in a Low Temperature Co-fired Ceramics Technology.
{"title":"Ab initio adaptive meshing for planar passive component modeling","authors":"J. Sieiro, J. López-Villegas, M. N. Vidal, J. A. Osorio, T. Carrasco, S. Ahyoune","doi":"10.23919/EUMC.2012.6459118","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459118","url":null,"abstract":"An ab initio technique for the meshing of planar radiofrequency and microwave circuits is described in this work. It is based on the analytical study of the current crowding phenomena that takes place inside the component. By using the mutual coupling inductive terms between metal strips, the ratio of the AC resistance due to proximity effects over the DC resistance can be evaluated for each metal strip. In such evaluation, it is not required an explicit solution of currents and charges at any part of the circuit. Then, the number of mesh cells assigned to a given metal strip depends on the value of the ratio. This technique is applied to the computation of losses in high Q inductors implemented in a Low Temperature Co-fired Ceramics Technology.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123639610","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459366
I. Liberal, I. Ederra, R. Gonzalo
Measuring ferromagnetic wires inside a metallic rectangular waveguide is proposed as a technique to characterize the high-frequency magnetoimpedance effect under mechanical stresses, which is of great interest for self-sensing materials in architectural and health monitoring. By using this technique, the magnetostrictive behaviour of a 5.25 μm radius Fe77.5Si12.5B10 wire has been evaluated. The wire is characterized by the occurrence of the natural ferromagnetic resonance, whose frequency position is shifted from 7 GHz to 8.25 GHz for elongations ranging from 0 to 60 μm.
{"title":"Characterization of ferromagnetic wires for self-sensing materials","authors":"I. Liberal, I. Ederra, R. Gonzalo","doi":"10.23919/EUMC.2012.6459366","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459366","url":null,"abstract":"Measuring ferromagnetic wires inside a metallic rectangular waveguide is proposed as a technique to characterize the high-frequency magnetoimpedance effect under mechanical stresses, which is of great interest for self-sensing materials in architectural and health monitoring. By using this technique, the magnetostrictive behaviour of a 5.25 μm radius Fe77.5Si12.5B10 wire has been evaluated. The wire is characterized by the occurrence of the natural ferromagnetic resonance, whose frequency position is shifted from 7 GHz to 8.25 GHz for elongations ranging from 0 to 60 μm.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122039124","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459342
J. Cano, E. Villa, J. Cagigas, B. Aja, J. V. Terán, A. Pérez, L. de la Fuente, E. Artal, A. Mediavilla, R. Hoyland
This paper presents the configuration of the Ka-band radiometer developed for the Phase II of the QUIJOTE radio astronomy experiment, as well as the design of the different subsystems involved in the instrument. The new configuration, consisting of around 30 modified receivers working in the 26 - 36 GHz band, avoids the need of a rotating polar modulator at cryogenic temperatures, which is a source of mechanical and thermal difficulties. Moreover, the larger number of receivers will increase the instrument sensitivity. These two aspects are a clear advantage over the receiver developed for the experiment Phase I. The present paper also gives detailed information of some designed subsystems such as the feedhorn, the polarizer, the orthomode transducer, the cryogenic low-noise amplifiers and the back-end module.
{"title":"Multi-pixel Ka-band radiometer for the QUIJOTE experiment (Phase II)","authors":"J. Cano, E. Villa, J. Cagigas, B. Aja, J. V. Terán, A. Pérez, L. de la Fuente, E. Artal, A. Mediavilla, R. Hoyland","doi":"10.23919/EUMC.2012.6459342","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459342","url":null,"abstract":"This paper presents the configuration of the Ka-band radiometer developed for the Phase II of the QUIJOTE radio astronomy experiment, as well as the design of the different subsystems involved in the instrument. The new configuration, consisting of around 30 modified receivers working in the 26 - 36 GHz band, avoids the need of a rotating polar modulator at cryogenic temperatures, which is a source of mechanical and thermal difficulties. Moreover, the larger number of receivers will increase the instrument sensitivity. These two aspects are a clear advantage over the receiver developed for the experiment Phase I. The present paper also gives detailed information of some designed subsystems such as the feedhorn, the polarizer, the orthomode transducer, the cryogenic low-noise amplifiers and the back-end module.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125903770","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459134
Younghan Kim, Tae-Hun Ki, Chelho Chung, Yeon-kug Moon, Yongseok Lim, Seung-ok Lim
This paper describes a low-power, high-performance RFID tag and wireless power transfer IC for according to the requirements of the EPC Class 1 Generation 2. Operating in the frequency ranges of 860 ~ 960 MHz, the reading operation of tag IC is the -15 dBm minimum power sensitivity. The tag IC consists of an analog part for modulation/demodulation/oscillation, a digital control logic part for controlling the transceiver functionality, and a 512-bit non-volatile memory (NVM) for storing EPC code and a unique identification number. The UHF RFID tag IC is implemented in the 0.18 μm CMOS standard technology. The overall power consumption is only 6 μW at 1.3 V supply voltage. The chip size is 610 μm × 615 μm.
{"title":"Implementation of a low-cost and low-power batteryless transceiver SoC for UHF RFID and wireless power transfer system","authors":"Younghan Kim, Tae-Hun Ki, Chelho Chung, Yeon-kug Moon, Yongseok Lim, Seung-ok Lim","doi":"10.23919/EUMC.2012.6459134","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459134","url":null,"abstract":"This paper describes a low-power, high-performance RFID tag and wireless power transfer IC for according to the requirements of the EPC Class 1 Generation 2. Operating in the frequency ranges of 860 ~ 960 MHz, the reading operation of tag IC is the -15 dBm minimum power sensitivity. The tag IC consists of an analog part for modulation/demodulation/oscillation, a digital control logic part for controlling the transceiver functionality, and a 512-bit non-volatile memory (NVM) for storing EPC code and a unique identification number. The UHF RFID tag IC is implemented in the 0.18 μm CMOS standard technology. The overall power consumption is only 6 μW at 1.3 V supply voltage. The chip size is 610 μm × 615 μm.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127459886","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459169
J. Calle-Sánchez, M. Molina-Garcia, J. Alonso, Alfonso Fernandez Duran
Emerging femtocell networks are conceived to extend radio coverage indoors, giving support to a high variety of services. In enterprise scenarios, the demand of reliable and accurate indoor Location Based Services (LBS) is gaining momentum. The femtocell network infrastructure can be used to provide location services based on Received Signal Strength Index (RSSI) and fingerprint location techniques. In this paper, an analysis of different propagation models has been carried out to evaluate their suitability for reducing calibration efforts during fingerprint calibration stage. For that purpose, a procedure including both a simulation process and a measurement campaign has been defined. Results obtained will allow adjusting indoor propagation models parameters and evaluating their applicability for reducing calibration effort while improving accuracy in location fingerprint techniques.
{"title":"Suitability of indoor propagation models for fingerprint based positioning in femtocell networks","authors":"J. Calle-Sánchez, M. Molina-Garcia, J. Alonso, Alfonso Fernandez Duran","doi":"10.23919/EUMC.2012.6459169","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459169","url":null,"abstract":"Emerging femtocell networks are conceived to extend radio coverage indoors, giving support to a high variety of services. In enterprise scenarios, the demand of reliable and accurate indoor Location Based Services (LBS) is gaining momentum. The femtocell network infrastructure can be used to provide location services based on Received Signal Strength Index (RSSI) and fingerprint location techniques. In this paper, an analysis of different propagation models has been carried out to evaluate their suitability for reducing calibration efforts during fingerprint calibration stage. For that purpose, a procedure including both a simulation process and a measurement campaign has been defined. Results obtained will allow adjusting indoor propagation models parameters and evaluating their applicability for reducing calibration effort while improving accuracy in location fingerprint techniques.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132207314","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459333
C. M. Wu, J. S. Sun, T. Itoh
This paper presents a simple design of self-powered demodulator for wireless power and data transmission. An AM-modulated signal with the carrier frequency at 5.96GHz and modulating signal at 100MHz is received by the demodulator. The carrier component of the signal is utilized to be converted to DC level to power up the baseband amplifier that amplifies the demodulated signal. Therefore the external battery can be eliminated. In addition, a composite right/left-handed (CRLH) metamaterial based substrate-integrated-waveguide (SIW) antenna is used to make the whole circuit more compact.
{"title":"A simple self-powered AM-demodulator for wireless power/data transmission","authors":"C. M. Wu, J. S. Sun, T. Itoh","doi":"10.23919/EUMC.2012.6459333","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459333","url":null,"abstract":"This paper presents a simple design of self-powered demodulator for wireless power and data transmission. An AM-modulated signal with the carrier frequency at 5.96GHz and modulating signal at 100MHz is received by the demodulator. The carrier component of the signal is utilized to be converted to DC level to power up the baseband amplifier that amplifies the demodulated signal. Therefore the external battery can be eliminated. In addition, a composite right/left-handed (CRLH) metamaterial based substrate-integrated-waveguide (SIW) antenna is used to make the whole circuit more compact.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130981714","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459131
Johannes Meyer, B. Geck, Ludger Overmeyer, S. Franke
This paper presents a hybrid antenna design for an optically powered super high frequency (SHF) RFID transponder applicable for the integration into metal. The key feature of the antenna is its ability to receive microwave signals at SHF for the data communication and optical signals for the power supply of the transponder. The antenna design is based on a circular waveguide which is filled with polymer optical fibers to guide light to the photodiodes to power up the transponder. Additionally a transition is placed within the circular waveguide to transfer the waveguide mode of the SHF signal into a microstrip mode which is a more suitable structure for the integration of electronic transponder components. This paper discusses the constraints and solutions for the here presented combination of SHF microwave and light. Furthermore, the gain of the antenna structure is measured and compared to the simulated one.
{"title":"An antenna concept for an optically powered SHF RFID transponder applicable into metal","authors":"Johannes Meyer, B. Geck, Ludger Overmeyer, S. Franke","doi":"10.23919/EUMC.2012.6459131","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459131","url":null,"abstract":"This paper presents a hybrid antenna design for an optically powered super high frequency (SHF) RFID transponder applicable for the integration into metal. The key feature of the antenna is its ability to receive microwave signals at SHF for the data communication and optical signals for the power supply of the transponder. The antenna design is based on a circular waveguide which is filled with polymer optical fibers to guide light to the photodiodes to power up the transponder. Additionally a transition is placed within the circular waveguide to transfer the waveguide mode of the SHF signal into a microstrip mode which is a more suitable structure for the integration of electronic transponder components. This paper discusses the constraints and solutions for the here presented combination of SHF microwave and light. Furthermore, the gain of the antenna structure is measured and compared to the simulated one.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125557877","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459219
A. Lampérez, S. Romano, M. S. Palma
A synthesis method for extracted-pole filters is presented. As previous methods, it is based on successive extractions of simple elements, particularly what are called extracted-pole sections, composed of one non-resonant node and a resonator that is coupled exclusively to it. The difference with other methods is that this one does not require the inclusion of fixed-phase sections of transmission line, even as an auxiliary tool. Therefore, the network is composed solely of coupled resonators and non-resonant nodes. A detailed synthesis example of a fourth order filter with three prescribed transmission zeros shows that the resulting network contains reactive elements at the ports, related to its phase response. These reactive elements can be easily cancelled once computed the complete coupling matrix.
{"title":"Synthesis of extracted-pole filters without fixed-phase lengths","authors":"A. Lampérez, S. Romano, M. S. Palma","doi":"10.23919/EUMC.2012.6459219","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459219","url":null,"abstract":"A synthesis method for extracted-pole filters is presented. As previous methods, it is based on successive extractions of simple elements, particularly what are called extracted-pole sections, composed of one non-resonant node and a resonator that is coupled exclusively to it. The difference with other methods is that this one does not require the inclusion of fixed-phase sections of transmission line, even as an auxiliary tool. Therefore, the network is composed solely of coupled resonators and non-resonant nodes. A detailed synthesis example of a fourth order filter with three prescribed transmission zeros shows that the resulting network contains reactive elements at the ports, related to its phase response. These reactive elements can be easily cancelled once computed the complete coupling matrix.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126237114","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459098
K. Ghorbani, T. Baum, L. Thompson
The investigation of forest fire ash has been presented for the analysis of microwave and millimeter wave radar systems performance. The base complex permittivity is measured with respect to temperature and Radar-Cross Section (RCS) is simulated in order to identify the organic material behavior. The complex permittivity is measured from X-band (8-12GHz) to Ka-Band (26.5-40GHz). Physical material properties are also measured. These include mass, color variations, particle size distributions, and aspect ratio distributions based on exposed temperature. The material properties are then analyzed for their volumetric backscattering capacity using a co-simulated MATLAB - CST-MWS (Microwave Studio) routine. Basic microwave and millimeter wave radar systems performance parameters have been identified for fire particle detection.
{"title":"Properties and Radar Cross-Section of forest fire ash particles at millimeter wave","authors":"K. Ghorbani, T. Baum, L. Thompson","doi":"10.23919/EUMC.2012.6459098","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459098","url":null,"abstract":"The investigation of forest fire ash has been presented for the analysis of microwave and millimeter wave radar systems performance. The base complex permittivity is measured with respect to temperature and Radar-Cross Section (RCS) is simulated in order to identify the organic material behavior. The complex permittivity is measured from X-band (8-12GHz) to Ka-Band (26.5-40GHz). Physical material properties are also measured. These include mass, color variations, particle size distributions, and aspect ratio distributions based on exposed temperature. The material properties are then analyzed for their volumetric backscattering capacity using a co-simulated MATLAB - CST-MWS (Microwave Studio) routine. Basic microwave and millimeter wave radar systems performance parameters have been identified for fire particle detection.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121441052","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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