Pub Date : 2016-06-01DOI: 10.1109/ISFEE.2016.7803219
Zuo‐Min Tsai, Po-Shien Li
This paper presents a Butler matrix for harmonic radar application. The proposed Butler matrix has the same beam directions in the two different frequencies and the higher frequency can be the double of the lower frequency. Therefore, it can be implemented on the harmonic radar for beam steering function. The Butler matrix is composed of wideband couplers, and dual band phase shifters. With reflection type phase shifter and stepped impedance resonators. The phase shifter can have different phase shifts in the two frequencies and make the Butler matrix have the same direction in the two operation frequency.
{"title":"Butler matrix for harmonic radar application","authors":"Zuo‐Min Tsai, Po-Shien Li","doi":"10.1109/ISFEE.2016.7803219","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803219","url":null,"abstract":"This paper presents a Butler matrix for harmonic radar application. The proposed Butler matrix has the same beam directions in the two different frequencies and the higher frequency can be the double of the lower frequency. Therefore, it can be implemented on the harmonic radar for beam steering function. The Butler matrix is composed of wideband couplers, and dual band phase shifters. With reflection type phase shifter and stepped impedance resonators. The phase shifter can have different phase shifts in the two frequencies and make the Butler matrix have the same direction in the two operation frequency.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126215361","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803181
I. Nemoianu, M. Maricaru, R. Ciuceanu
A groundbreaking discovery made by Professor Andrei Ţugulea in mid 1980s led to a new approach concerning the power flow analysis in three-phase circuits. The present study is devoted to provide a further insight into the possibilities opened by this new theory, when a three phase circuit has two different unbalanced and distorting consumers powered through a balanced line. Symmetry, non-symmetry and residual (distortion) active and reactive powers are the conceptual quantities introduced by Professor Ţugulea capable to assess the nonlinearity and unbalance effects on power circulation. Correspondingly, three normalized coefficients were defined to allow a more compact representation of the phenomena: symmetry, non-symmetry and distortion power factors. Initially formulated for two balanced linear receptors and a single unbalanced distorting one, the present study considers a single balanced linear receptor and two unbalanced nonlinear (distorting) consumers. All possible cases concerning the active and reactive powers flow directions are put in evidence through different parameter circuits simulated in PSpice. Finally, interpretation of the obtained results is presented and discussed.
{"title":"Active and reactive power flow in distorting three-phase unbalanced circuits without neutral","authors":"I. Nemoianu, M. Maricaru, R. Ciuceanu","doi":"10.1109/ISFEE.2016.7803181","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803181","url":null,"abstract":"A groundbreaking discovery made by Professor Andrei Ţugulea in mid 1980s led to a new approach concerning the power flow analysis in three-phase circuits. The present study is devoted to provide a further insight into the possibilities opened by this new theory, when a three phase circuit has two different unbalanced and distorting consumers powered through a balanced line. Symmetry, non-symmetry and residual (distortion) active and reactive powers are the conceptual quantities introduced by Professor Ţugulea capable to assess the nonlinearity and unbalance effects on power circulation. Correspondingly, three normalized coefficients were defined to allow a more compact representation of the phenomena: symmetry, non-symmetry and distortion power factors. Initially formulated for two balanced linear receptors and a single unbalanced distorting one, the present study considers a single balanced linear receptor and two unbalanced nonlinear (distorting) consumers. All possible cases concerning the active and reactive powers flow directions are put in evidence through different parameter circuits simulated in PSpice. Finally, interpretation of the obtained results is presented and discussed.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125589788","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803237
Agah Oktay Ertay, S. Simsek
The main objective of this work is to present a compact microstrip bandstop filter for X-band applications. The designed filter covers X-band and has stopband bandwidth with better than 2.5GHz for -20dB. Maximum |S11| value in the passband region is below -15dB for the final filter. Optimum distributed bandstop filter design method is used to acquire the design goals. The final filter has a compact size with 12.87mm × 7.04mm. Two-stage design procedure is proposed to realize design objectives. It is proposed in the first stage of the design procedure to have realizable open stubs which is difficult to implement for given dielectric substrate properties. To remedy this difficulty, a wide stopband region is selected. The second stage of the design procedure presents an optimization process to achieve desired filter. In order to examine the frequency responses of all design steps, three commercial electromagnetic simulators are used. Consistent simulation results are obtained before implementation.
{"title":"A compact bandstop filter design for X-band applications","authors":"Agah Oktay Ertay, S. Simsek","doi":"10.1109/ISFEE.2016.7803237","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803237","url":null,"abstract":"The main objective of this work is to present a compact microstrip bandstop filter for X-band applications. The designed filter covers X-band and has stopband bandwidth with better than 2.5GHz for -20dB. Maximum |S11| value in the passband region is below -15dB for the final filter. Optimum distributed bandstop filter design method is used to acquire the design goals. The final filter has a compact size with 12.87mm × 7.04mm. Two-stage design procedure is proposed to realize design objectives. It is proposed in the first stage of the design procedure to have realizable open stubs which is difficult to implement for given dielectric substrate properties. To remedy this difficulty, a wide stopband region is selected. The second stage of the design procedure presents an optimization process to achieve desired filter. In order to examine the frequency responses of all design steps, three commercial electromagnetic simulators are used. Consistent simulation results are obtained before implementation.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126161515","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803194
A. Lup, G. Ciuprina, Ș. Sorohan, D. Isvoranu, G. Boldeiu, A. Stefanescu
This paper investigates the extraction of lumped parameters (elastic coefficient and effective mass) for RF MEMS switches. The extraction starts from field simulations obtained with the finite element method, which solves strongly coupled structural-electrostatic field problems, and is based on least square fitting. The elastic coefficients are extracted from static coupled simulations, whereas the effective mass is extracted from a dynamic, without damping, unforced, transient simulation. The degree of system nonlinearity can be estimated from the static simulation. If the system is close to linearity with respect to its structural behavior, then a simple algorithm to extract the effective mass is proposed. The validations are carried out by comparing the initial field results with the results obtained from the reduced order models. Relative errors less than 8 % are obtained for the pull-in voltage for all the structures investigated.
{"title":"Extraction of lumped structural parameters from multiphysics field simulations for MEMS switches","authors":"A. Lup, G. Ciuprina, Ș. Sorohan, D. Isvoranu, G. Boldeiu, A. Stefanescu","doi":"10.1109/ISFEE.2016.7803194","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803194","url":null,"abstract":"This paper investigates the extraction of lumped parameters (elastic coefficient and effective mass) for RF MEMS switches. The extraction starts from field simulations obtained with the finite element method, which solves strongly coupled structural-electrostatic field problems, and is based on least square fitting. The elastic coefficients are extracted from static coupled simulations, whereas the effective mass is extracted from a dynamic, without damping, unforced, transient simulation. The degree of system nonlinearity can be estimated from the static simulation. If the system is close to linearity with respect to its structural behavior, then a simple algorithm to extract the effective mass is proposed. The validations are carried out by comparing the initial field results with the results obtained from the reduced order models. Relative errors less than 8 % are obtained for the pull-in voltage for all the structures investigated.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115182388","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803164
L. Mandache, A. Marinescu, M. Iordache
The present accelerated development of microelectronics led to new health care applications that previously could not have been designed and here can be cited the active implanted medical devices - IMD. But their supply implies the existence of a power source, usually a battery whose lifetime is limited and must be changed so it requires repeated incisions. This paper presents an analysis of Transcutaneous Energy Transfer - TET for recharging the batteries from the IMDs based on wireless technology. It is shown that, by using magnetic resonance (WiTricity), namely a variant thereof, the energy and data transmission are not restricted by the position of the patient (receiver) with respect to the source (transmitter).
目前微电子技术的加速发展导致了以前无法设计的新的医疗保健应用，这里可以引用有源植入医疗设备- IMD。但它们的供应意味着电源的存在，通常是电池，其寿命有限，必须更换，因此需要反复切割。本文介绍了一种基于无线技术的经皮能量传输技术(transccutaneous Energy Transfer - TET)。结果表明，通过使用磁共振(WiTricity)，即其变体，能量和数据传输不受患者(接收器)相对于源(发射器)的位置的限制。
{"title":"On feasibility and optimization of WiTricity technology for implantable medical devices","authors":"L. Mandache, A. Marinescu, M. Iordache","doi":"10.1109/ISFEE.2016.7803164","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803164","url":null,"abstract":"The present accelerated development of microelectronics led to new health care applications that previously could not have been designed and here can be cited the active implanted medical devices - IMD. But their supply implies the existence of a power source, usually a battery whose lifetime is limited and must be changed so it requires repeated incisions. This paper presents an analysis of Transcutaneous Energy Transfer - TET for recharging the batteries from the IMDs based on wireless technology. It is shown that, by using magnetic resonance (WiTricity), namely a variant thereof, the energy and data transmission are not restricted by the position of the patient (receiver) with respect to the source (transmitter).","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129855115","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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