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2012 19th International Conference on Microwaves, Radar & Wireless Communications最新文献

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Optical transmission of OFDM NQAM signals by direct laser modulation 直接激光调制OFDM NQAM信号的光传输
2012 19th International Conference on Microwaves, Radar & Wireless Communications Pub Date : 2012-05-21 DOI: 10.1109/MIKON.2012.6233562
T. Cseh, T. Berceli
{"title":"Optical transmission of OFDM NQAM signals by direct laser modulation","authors":"T. Cseh, T. Berceli","doi":"10.1109/MIKON.2012.6233562","DOIUrl":"https://doi.org/10.1109/MIKON.2012.6233562","url":null,"abstract":"The OFDM modulation method is widely used in several wireless applications because they are robust against multi-path distortions in the radio channel. However OFDM is sensitive to the channel nonllnearities. The OFDM signals are usually transmitted over an optical link to the wireless link. In this method the radio signals are transposed into the optical domain. In low cost systems direct laser modulation is applied. The nonlinearity of this type of modulation can cause distortion and this way limitation on the optical transmission. In this paper we present investigations on the limitations by simulations and experiments with the result of conditions for optimum operation.","PeriodicalId":425104,"journal":{"name":"2012 19th International Conference on Microwaves, Radar & Wireless Communications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115378104","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}
引用次数: 3
3.9GHz accelerating cavity field detection hardware for the free-electron laser 用于自由电子激光器的3.9GHz加速腔场检测硬件
2012 19th International Conference on Microwaves, Radar & Wireless Communications Pub Date : 2012-05-21 DOI: 10.1109/MIKON.2012.6233497
J. Piekarski, M. Zukocinski, K. Czuba, M. Hoffmann, F. Ludwig, H. Schlarb
{"title":"3.9GHz accelerating cavity field detection hardware for the free-electron laser","authors":"J. Piekarski, M. Zukocinski, K. Czuba, M. Hoffmann, F. Ludwig, H. Schlarb","doi":"10.1109/MIKON.2012.6233497","DOIUrl":"https://doi.org/10.1109/MIKON.2012.6233497","url":null,"abstract":"The 3rd harmonic system installed in the injector at FLASH (Free-Electron Laser at Hamburg) accelerator allows to achieve ultra short electron bunches with higher peak current, which pushed the limits of high brilliance laser light generation into the so-called water window. The 3rd harmonic system operates at 3.9GHz and requires a very precise phase and amplitude control of the accelerating field below 10fs, which is done by the Low-Level RF system. One of the key component is the RF field detector that converts the detected cavity field signal to an intermediate frequency for digital sampling. The paper presents an overview of the system, particularly the low phase noise reference generator, local oscillator and multichannel down-converter. System scheme and performance are demonstrated.","PeriodicalId":425104,"journal":{"name":"2012 19th International Conference on Microwaves, Radar & Wireless Communications","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125038228","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}
引用次数: 2
Filter design/or modern communication systems 滤波器设计/或现代通信系统
2012 19th International Conference on Microwaves, Radar & Wireless Communications Pub Date : 2012-05-21 DOI: 10.1109/MIKON.2012.6233582
R. Snyder
{"title":"Filter design/or modern communication systems","authors":"R. Snyder","doi":"10.1109/MIKON.2012.6233582","DOIUrl":"https://doi.org/10.1109/MIKON.2012.6233582","url":null,"abstract":"With usable RF spectrum as one of the most expensive-and usually unavailable-natural resources, frequency subdivision techniques are critically important for protection of both the content producer and the consumer. The use of filters to provide walls to ensure isolation of users from one another is common, but the design of such filters is difficult because of proximity. With spectrum more costly than hardware, the ordered metrics for filters are performance, size, reliability, and lastly, selling cost. In this paper we will discuss topology and manufacturing technology for the more recent approaches to implementation of such filters.","PeriodicalId":425104,"journal":{"name":"2012 19th International Conference on Microwaves, Radar & Wireless Communications","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114386749","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}
引用次数: 0
Electrical characterization of a wirebonded TO-39 package for IR radiation detectors 红外辐射探测器用线结TO-39封装的电学特性
2012 19th International Conference on Microwaves, Radar & Wireless Communications Pub Date : 2012-05-21 DOI: 10.1109/MIKON.2012.6233549
P. Kopyt, D. Gryglewski, W. Wojtasiak, W. Gwarek
{"title":"Electrical characterization of a wirebonded TO-39 package for IR radiation detectors","authors":"P. Kopyt, D. Gryglewski, W. Wojtasiak, W. Gwarek","doi":"10.1109/MIKON.2012.6233549","DOIUrl":"https://doi.org/10.1109/MIKON.2012.6233549","url":null,"abstract":"In this paper an approach to modeling of TO-39 packages employed for IR detectors wirebonded to the package leads is discussed. The presented approach is based on measurements of a real package in which the detector chip was replaced with a 2-port of known parameters (a microstrip line of length equall to that of the original chip) and connected to the package leads with wirebonds. In this respect the presented procedure differs from the literature reports, which concentrate mostly on indirect package characterization based solely on full-wave EM models of the packages. The sensitivity of the approach to varying lengths of the wirebonds used to connect the known 2-port to the package is analyzed. To this end, the structure was wirebonded several times. Each time it was measured so that the discrepancy in extracted parameters of the package equivalent circuit could be observed.","PeriodicalId":425104,"journal":{"name":"2012 19th International Conference on Microwaves, Radar & Wireless Communications","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114577631","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}
引用次数: 0
Stability analysis of emissivity levels of the mobile computers 移动计算机发射率水平稳定性分析
2012 19th International Conference on Microwaves, Radar & Wireless Communications Pub Date : 2012-05-21 DOI: 10.1109/MIKON.2012.6233611
M. Bugaj, R. Przesmycki, L. Nowosielski, K. Piwowarczyk
{"title":"Stability analysis of emissivity levels of the mobile computers","authors":"M. Bugaj, R. Przesmycki, L. Nowosielski, K. Piwowarczyk","doi":"10.1109/MIKON.2012.6233611","DOIUrl":"https://doi.org/10.1109/MIKON.2012.6233611","url":null,"abstract":"The article presents problems of stability of emission levels of mobile computers. An attempt was made to determine the minimum number of measurements to ensure the desired stability level of radiated emission. The paper shows the measure of the stability emissivity levels of portable computers.","PeriodicalId":425104,"journal":{"name":"2012 19th International Conference on Microwaves, Radar & Wireless Communications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124082975","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}
引用次数: 4
Excitation networks for two-element ultra-wideband antennas 双元超宽带天线激励网络
2012 19th International Conference on Microwaves, Radar & Wireless Communications Pub Date : 2012-05-21 DOI: 10.1109/MIKON.2012.6233476
G. Czawka, M. Nowakowski
{"title":"Excitation networks for two-element ultra-wideband antennas","authors":"G. Czawka, M. Nowakowski","doi":"10.1109/MIKON.2012.6233476","DOIUrl":"https://doi.org/10.1109/MIKON.2012.6233476","url":null,"abstract":"This paper attempts to give an overview of the excitation network of ultra-wideband (UWB) technology by covering aspects such as theory, challenges, designing steps, characteristics and performance. Proposed novel ultra-wideband hybrid based on stripline technology cover frequency range for use in ultra-wideband systems according ETSI standards 6-8.5 GHz. Proposed solution can be easily implemented together with printed UWB two-element monopole radiators on the same laminates. Provided analysis considers EMC problems related to transmission of short duration impulses.","PeriodicalId":425104,"journal":{"name":"2012 19th International Conference on Microwaves, Radar & Wireless Communications","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128183215","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}
引用次数: 1
Fast frequency sweep based on the model order reduction technique for calculating scattering parameters in FDFD 基于模型降阶技术的快速扫频法计算FDFD中散射参数
2012 19th International Conference on Microwaves, Radar & Wireless Communications Pub Date : 2012-05-21 DOI: 10.1109/MIKON.2012.6233553
J. Podwalski, M. Mrozowski
{"title":"Fast frequency sweep based on the model order reduction technique for calculating scattering parameters in FDFD","authors":"J. Podwalski, M. Mrozowski","doi":"10.1109/MIKON.2012.6233553","DOIUrl":"https://doi.org/10.1109/MIKON.2012.6233553","url":null,"abstract":"The paper presents an improved, efficient method of the frequency sweep for the Finite Difference in Frequency Domain scheme. The number of equations describing the entire analyzed structure is reduced with the Model Order Reduction technique and then diagonalized. Time-expensive inversion of large matrices for each frequency point is substituted by a simple multiplication of a small, diagonal matrix by a vector. The presented fast frequency sweep can also be used for the FDFD containing macromodels.","PeriodicalId":425104,"journal":{"name":"2012 19th International Conference on Microwaves, Radar & Wireless Communications","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134039096","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}
引用次数: 0
An energy effective method for topology control in wireless sensor networks 一种能量有效的无线传感器网络拓扑控制方法
2012 19th International Conference on Microwaves, Radar & Wireless Communications Pub Date : 2012-05-21 DOI: 10.1109/MIKON.2012.6233573
M. Wawryszczuk, M. Amanowicz
{"title":"An energy effective method for topology control in wireless sensor networks","authors":"M. Wawryszczuk, M. Amanowicz","doi":"10.1109/MIKON.2012.6233573","DOIUrl":"https://doi.org/10.1109/MIKON.2012.6233573","url":null,"abstract":"Recent years have shown that wireless sensor networks (WSN) are becoming more and more popular in industry and everyday life activities. The topology control is a crucial technique, which is used to obtain energy efficiency without affecting the network's connectivity and coverage. The article demonstrates a specific topology control mechanism that significantly reduces the energy consumption without affecting the network's connectivity and coverage. The results are compared to different approaches proposed by other authors. Finally, the authors discuss the topology control mechanisms usage for the forthcoming years.","PeriodicalId":425104,"journal":{"name":"2012 19th International Conference on Microwaves, Radar & Wireless Communications","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115723550","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}
引用次数: 4
Reconfigurable antenna designs using micro-pneumatic control of dielectric slugs 利用介电弹片微气动控制的可重构天线设计
2012 19th International Conference on Microwaves, Radar & Wireless Communications Pub Date : 2012-05-21 DOI: 10.1109/MIKON.2012.6233480
B. Wu, T. Apperley, M. Okoniewski, C. Hayden
{"title":"Reconfigurable antenna designs using micro-pneumatic control of dielectric slugs","authors":"B. Wu, T. Apperley, M. Okoniewski, C. Hayden","doi":"10.1109/MIKON.2012.6233480","DOIUrl":"https://doi.org/10.1109/MIKON.2012.6233480","url":null,"abstract":"The designs of a single-fed circularly-polarized (CP) microstrip antenna with switchable polarization and a tunable dielectric resonator antenna (DRA), using metal-plated dielectric slugs, are described. The scheme of micro-pneumatic control of solid slugs presents an alternative to the existing methods in realizing reconfigurable antennas. The radiation polarization of the CP antenna and the resonant frequency of the DRA are determined by the position of the slugs inside the substrate. Both antennas have been simulated and the results demonstrate the viability of this new antenna reconfiguration method.","PeriodicalId":425104,"journal":{"name":"2012 19th International Conference on Microwaves, Radar & Wireless Communications","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124437984","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}
引用次数: 1
A new method of synthesis of multiple-decade band directional couplers 一种合成数十年波段定向耦合器的新方法
2012 19th International Conference on Microwaves, Radar & Wireless Communications Pub Date : 2012-05-21 DOI: 10.1109/MIKON.2012.6233522
P. Miazga
{"title":"A new method of synthesis of multiple-decade band directional couplers","authors":"P. Miazga","doi":"10.1109/MIKON.2012.6233522","DOIUrl":"https://doi.org/10.1109/MIKON.2012.6233522","url":null,"abstract":"A new method of synthesis of a prototype of multiple-decade band coupler is presented this paper. Optimally designed “stepped” coupler usually consists of a cascade connection of large number of two kinds of uniform coupled transmission line sections. Coupled transmission lines, of maximal acceptable coupling are separated by non-coupled or minimally coupled sections. Analytical solution for the problem is usually not available, therefore synthesis can be solved only by numerical optimization. Modern optimization solvers can successfully coup with huge number of parameters, however a suitable starting point for optimization is required. Therefore a three stage synthesis algorithm is proposed. Firstly, a starting point is generated by a direct shape optimization method. A non-uniform coupled transmission line is evolved from scratch. Secondly, the non-uniform line is converted into a stepped one. Finally, the coupler is optimized with dynamically growing frequency band. An example of synthesis of 0.1 to 10.6 GHz 10 dB coupler with ideal uniform coupled transmission lines is presented.","PeriodicalId":425104,"journal":{"name":"2012 19th International Conference on Microwaves, Radar & Wireless Communications","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114890957","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}
引用次数: 0
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