Pub Date : 2006-05-22DOI: 10.1109/MIKON.2006.4345120
A. Lewandowski, K. Kucy, D. Startek
We present design and performance verification of a high-speed programmable pulse generator based on an integrated direct digital synthesizer (DDS). The generator can produce pulses with an arbitrary frequency modulation, instantaneous frequency up to 140 MHz, and widths ranging from microseconds to milliseconds. The pulses can be formed into arbitrary sequences with the minimum spacing of 150 ns. We experimentally verify performance of the generator for pulses with the linear frequency modulation (LFM), obtaining an excellent performance in terms of the compression ratio and side-lobes level. We also demonstrate the ability of our generator to produce pulses with a nonlinear frequency modulation (NLFM). Experimental analysis of an exemplary NLFM pulse produced by the generator confirms that NLFM allows to reduce the side-lobes level without deteriorating the compression ratio.
{"title":"High-Speed DDS-Based Generator of Pulses with an Arbitrary Frequency Modulation","authors":"A. Lewandowski, K. Kucy, D. Startek","doi":"10.1109/MIKON.2006.4345120","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345120","url":null,"abstract":"We present design and performance verification of a high-speed programmable pulse generator based on an integrated direct digital synthesizer (DDS). The generator can produce pulses with an arbitrary frequency modulation, instantaneous frequency up to 140 MHz, and widths ranging from microseconds to milliseconds. The pulses can be formed into arbitrary sequences with the minimum spacing of 150 ns. We experimentally verify performance of the generator for pulses with the linear frequency modulation (LFM), obtaining an excellent performance in terms of the compression ratio and side-lobes level. We also demonstrate the ability of our generator to produce pulses with a nonlinear frequency modulation (NLFM). Experimental analysis of an exemplary NLFM pulse produced by the generator confirms that NLFM allows to reduce the side-lobes level without deteriorating the compression ratio.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126476734","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345193
F. Dubrovka, K. Naumenko, M. Rusov
The problem of finding an optimal shape and geometry of the transition from square waveguide to bifurcated waveguide is considered.
研究了从方形波导到分叉波导过渡的最佳形状和几何问题。
{"title":"Parametric Optimization of Transition from Square Waveguide to Bifurcated Waveguide","authors":"F. Dubrovka, K. Naumenko, M. Rusov","doi":"10.1109/MIKON.2006.4345193","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345193","url":null,"abstract":"The problem of finding an optimal shape and geometry of the transition from square waveguide to bifurcated waveguide is considered.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126530577","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345363
M. O’halloran, M. Glavin, E. Jones
Due to the recent advances in ultra wide-band (UWB) radar technologies, there has been widespread interest in the possible medical applications of UWB microwave radar. Therefore, the development of accurate numerical techniques to predict the propagation of UWB signals in biological tissue is of great interest to researchers as an aid in developing signal processing algorithms. Two techniques for modeling the propagation of electromagnetic (EM) waves in human tissue are presented and compared in this paper: the planar and finite difference time domain (FDTD) technique. A four layer biological model is considered, three layers of normal tissue, and one layer of cancerous soft tissue (sarcoma). The two modeling techniques are used to predict the response of the model to the UWB input signal, with particular focus on the response of the sarcoma layer. Both the Planar technique and the FDTD technique identify the presence of the soft tissue sarcoma quite easily. However the FDTD technique predicts more subtle phenomena such as multiple reflections, albeit at a high computational cost.
{"title":"Comparison of A Planar and Finite Difference Time Domain Technique to Simulate the Propagation of Electromagnetic Waves in Biological Tissue","authors":"M. O’halloran, M. Glavin, E. Jones","doi":"10.1109/MIKON.2006.4345363","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345363","url":null,"abstract":"Due to the recent advances in ultra wide-band (UWB) radar technologies, there has been widespread interest in the possible medical applications of UWB microwave radar. Therefore, the development of accurate numerical techniques to predict the propagation of UWB signals in biological tissue is of great interest to researchers as an aid in developing signal processing algorithms. Two techniques for modeling the propagation of electromagnetic (EM) waves in human tissue are presented and compared in this paper: the planar and finite difference time domain (FDTD) technique. A four layer biological model is considered, three layers of normal tissue, and one layer of cancerous soft tissue (sarcoma). The two modeling techniques are used to predict the response of the model to the UWB input signal, with particular focus on the response of the sarcoma layer. Both the Planar technique and the FDTD technique identify the presence of the soft tissue sarcoma quite easily. However the FDTD technique predicts more subtle phenomena such as multiple reflections, albeit at a high computational cost.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122372162","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345255
B. Assanovich, A. Fedorov
A method of spectral modulation for ultra-wideband communication based on orthonormal transform with the use of sine functions is proposed. The results obtained show its better BER performance than conventional scheme in AWGN channel. The proposed scheme is of lower complexity and has additional error detection opportunities in the frequency band.
{"title":"Data Transmission in UWB with the Use of Pulse Spectrum Modulation","authors":"B. Assanovich, A. Fedorov","doi":"10.1109/MIKON.2006.4345255","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345255","url":null,"abstract":"A method of spectral modulation for ultra-wideband communication based on orthonormal transform with the use of sine functions is proposed. The results obtained show its better BER performance than conventional scheme in AWGN channel. The proposed scheme is of lower complexity and has additional error detection opportunities in the frequency band.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132414553","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345126
Michal Okoniewski, G. McFeetors
Radio frequency applications for microelectromechanical systems are reviewed, from a performance and fabrication prospective. The state of art in RF MEMS devices is discussed, focusing on switches, inductors, varactors, filters, phase shifters and antennas.
{"title":"Radio Frequency MicroElectroMechanical Systems Components","authors":"Michal Okoniewski, G. McFeetors","doi":"10.1109/MIKON.2006.4345126","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345126","url":null,"abstract":"Radio frequency applications for microelectromechanical systems are reviewed, from a performance and fabrication prospective. The state of art in RF MEMS devices is discussed, focusing on switches, inductors, varactors, filters, phase shifters and antennas.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130795797","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345189
T. Mroz, R. Frender, J. Michałowski
This paper presents some results of investigation for finding a structure and ferrite material for high peak and average power below resonance junction circulator. To meet a high power requirements, the structure involving four ferrite elements is selected. Few types of ferrite with rear-earth admixtures are tested at low and high power levels.
{"title":"S-Band Below Resonance High Power Circulator Search for Ferrite Material and Structure","authors":"T. Mroz, R. Frender, J. Michałowski","doi":"10.1109/MIKON.2006.4345189","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345189","url":null,"abstract":"This paper presents some results of investigation for finding a structure and ferrite material for high peak and average power below resonance junction circulator. To meet a high power requirements, the structure involving four ferrite elements is selected. Few types of ferrite with rear-earth admixtures are tested at low and high power levels.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116920029","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345137
J. Modelski, A. Synyavskyy
A numerical aspect of inverse scattering problem solution for plane wave normal incidence on an absorbing medium is considered in the paper. The electromagnetic field equations are reduced to the Zakharov-Shabat's one. A new numerical scheme is developed taking into account peculiarities of the integral equation method for this inverse scattering problem solution. The proposed method has a high accuracy and what is more, it requires neither time consumed iterative approximation nor direct matrix inversion.
{"title":"A New Numerical Method for Zakharov-Shabat'S Inverse Scattering Problem Solution","authors":"J. Modelski, A. Synyavskyy","doi":"10.1109/MIKON.2006.4345137","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345137","url":null,"abstract":"A numerical aspect of inverse scattering problem solution for plane wave normal incidence on an absorbing medium is considered in the paper. The electromagnetic field equations are reduced to the Zakharov-Shabat's one. A new numerical scheme is developed taking into account peculiarities of the integral equation method for this inverse scattering problem solution. The proposed method has a high accuracy and what is more, it requires neither time consumed iterative approximation nor direct matrix inversion.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132785660","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345392
J. Kus
This paper presents the design, parameters and results of measurements 6-bits IFM receiver for L band. The device is a complete solution, including limiting amplifier, trigger circuit and a circuit detecting whether a given frequency is out of band (OOB). This receiver is based on one microwave frequency discriminator.
{"title":"Instantaneous Frequency Measuring Receiver for L band","authors":"J. Kus","doi":"10.1109/MIKON.2006.4345392","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345392","url":null,"abstract":"This paper presents the design, parameters and results of measurements 6-bits IFM receiver for L band. The device is a complete solution, including limiting amplifier, trigger circuit and a circuit detecting whether a given frequency is out of band (OOB). This receiver is based on one microwave frequency discriminator.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128382373","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345222
W. Jesionkowski, K. Nyka
Bidirectional antenna amplifiers (BDA) are often used to extend the range of connections in wireless local area networks (WLAN). This paper presents the theory, design procedure and implementation of receiver part of a bidirectional amplifier (BDA) for the 5GHz WLAN systems in 802.11a and HiperLAN-2 standards. Only the blocks that affect the receiver path parameters are considered. In order to reduce the amplifier cost all its circuits are made on FR4 substrate. Since OFDM modulation used in 802.11a is very sensitive to harmonic and intermodulation distortions, two techniques of LNA linearity improvement are implemented.
{"title":"Receiver block of antenna amplifier for WLAN systems in 5 GHz band","authors":"W. Jesionkowski, K. Nyka","doi":"10.1109/MIKON.2006.4345222","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345222","url":null,"abstract":"Bidirectional antenna amplifiers (BDA) are often used to extend the range of connections in wireless local area networks (WLAN). This paper presents the theory, design procedure and implementation of receiver part of a bidirectional amplifier (BDA) for the 5GHz WLAN systems in 802.11a and HiperLAN-2 standards. Only the blocks that affect the receiver path parameters are considered. In order to reduce the amplifier cost all its circuits are made on FR4 substrate. Since OFDM modulation used in 802.11a is very sensitive to harmonic and intermodulation distortions, two techniques of LNA linearity improvement are implemented.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134213967","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345200
A. Pławiak-Mowna, A. Krawczyk
Rapid growth in wireless mobile communications has generated awareness about electromagnetic interferences of cardiac pacemaker with cellular phones and base station antenna. The work discusses threats connected with a possibility of interference of external electromagnetic fields with the functioning of cardiac pacemakers. The authors demonstrate the preliminary research results of research. The intention of this work was to test a several pacemaker models to determine whether incompatibility with base station antenna may exist. In vivo measuring setup was established and 53 different implanted models of 4 manufacturers were examined. The key point of the research procedure was a patient with implanted pacemaker who moves in the area of emission from base antenna. The operation parameters of the implanted pacemaker were monitored by the 24 hour Holter registration. No dysfunctions of pacemaker were registered.
{"title":"Influence of Electromagnetic Field Emitted by Base Station Antenna on Cardiac Pacemakers - Clinical Study","authors":"A. Pławiak-Mowna, A. Krawczyk","doi":"10.1109/MIKON.2006.4345200","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345200","url":null,"abstract":"Rapid growth in wireless mobile communications has generated awareness about electromagnetic interferences of cardiac pacemaker with cellular phones and base station antenna. The work discusses threats connected with a possibility of interference of external electromagnetic fields with the functioning of cardiac pacemakers. The authors demonstrate the preliminary research results of research. The intention of this work was to test a several pacemaker models to determine whether incompatibility with base station antenna may exist. In vivo measuring setup was established and 53 different implanted models of 4 manufacturers were examined. The key point of the research procedure was a patient with implanted pacemaker who moves in the area of emission from base antenna. The operation parameters of the implanted pacemaker were monitored by the 24 hour Holter registration. No dysfunctions of pacemaker were registered.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134279641","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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