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2007 17th International Conference Radioelektronika最新文献

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Radiation of a Whip Antenna on the Car Body 鞭状天线在车身上的辐射
2007 17th International Conference Radioelektronika Pub Date : 2007-04-24 DOI: 10.1109/RADIOELEK.2007.371693
Zdenek Novacek
{"title":"Radiation of a Whip Antenna on the Car Body","authors":"Zdenek Novacek","doi":"10.1109/RADIOELEK.2007.371693","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2007.371693","url":null,"abstract":"The paper described radiation pattern calculations for one type of a vehicular antenna. Both currents on a car body and their radiation were calculated using the electromagnetic simulator Zeland IE3D. Two simplified models of the antenna system based on replacing antenna wires by an unsymmetrical V-dipole and their mirror images were created for technical applications as well. Radiation patterns obtained for those models were compared to Zeland simulations.","PeriodicalId":446406,"journal":{"name":"2007 17th International Conference Radioelektronika","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133840722","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: 8
Numerical Inversion of Two-Dimensional Laplace Transforms Based on Partial Inversions 基于部分反演的二维拉普拉斯变换数值反演
2007 17th International Conference Radioelektronika Pub Date : 2007-04-24 DOI: 10.1109/RADIOELEK.2007.371455
L. Brancík
{"title":"Numerical Inversion of Two-Dimensional Laplace Transforms Based on Partial Inversions","authors":"L. Brancík","doi":"10.1109/RADIOELEK.2007.371455","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2007.371455","url":null,"abstract":"The paper deals with a technique for numerical inversion of two-dimensional Laplace transforms based on the FFT & IFFT in conjunction with a quotient-difference algorithm of Rutishauser. In contrast to the existing FFT-based technique the presented one is based on a repeated application of one-dimensional partial Laplace transform inversions. The method promises a generalization towards multidimensional numerical inverse Laplace transforms because it establishes more effective unified algorithmic approach to a computation. The method was programmed using Matlab language and analyzed as for its accuracy.","PeriodicalId":446406,"journal":{"name":"2007 17th International Conference Radioelektronika","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125911214","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: 17
Computer Simulation of Continuous-Time and Switched Circuits: Limitations of SPICE-Family Programs and Pending Issues 连续时间和开关电路的计算机模拟:SPICE-Family程序的局限性和悬而未决的问题
2007 17th International Conference Radioelektronika Pub Date : 2007-04-24 DOI: 10.1109/RADIOELEK.2007.371451
D. Biolek, J. Dobes
{"title":"Computer Simulation of Continuous-Time and Switched Circuits: Limitations of SPICE-Family Programs and Pending Issues","authors":"D. Biolek, J. Dobes","doi":"10.1109/RADIOELEK.2007.371451","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2007.371451","url":null,"abstract":"The contribution deals with some open problems from the area of transient and AC analyses of large continuous-time and switched circuits with the focus on switched capacitor circuits and switched DC-DC converters. The discussed weak points of SPICE-like and SPICE-compatible simulation programs consist in the absence of finding effectively the steady-state, in an inefficient integration algorithm for the transient analysis of switching phenomena, and in the absence of a direct AC analysis of switched circuits. The paper also describes some new approaches, which could be helpful in overcoming the above limitations.","PeriodicalId":446406,"journal":{"name":"2007 17th International Conference Radioelektronika","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128743047","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: 12
Two-Probe Coaxial-to-Coplanar Dual Directional Coupler for 2.45-GHz ISM Measurement Applications 用于2.45 ghz ISM测量应用的双探头同轴-共面双向耦合器
2007 17th International Conference Radioelektronika Pub Date : 2007-04-24 DOI: 10.1109/RADIOELEK.2007.371662
V. Bilik, F. Hutira, J. Bezek
{"title":"Two-Probe Coaxial-to-Coplanar Dual Directional Coupler for 2.45-GHz ISM Measurement Applications","authors":"V. Bilik, F. Hutira, J. Bezek","doi":"10.1109/RADIOELEK.2007.371662","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2007.371662","url":null,"abstract":"A 2.45-GHz directional coupler with coplanar output is described whose main arm is a section of EIA 7/16\" coaxial line. The coupling is established by means of two electric probes extending into the coaxial line interior. The two coupled signals interfere in an external coplanar waveguide interconnecting the probe outputs. The coupling factor can be set in a wide range by the probe lengths. The directivity exceeds 25 dB in the range 2450+25 MHz. The structure is suitable for constructing a dual directional coupler/detector.","PeriodicalId":446406,"journal":{"name":"2007 17th International Conference Radioelektronika","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128972661","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
Accurate AM Depth Measurement in the Presence of Angle Modulation 在存在角度调制的情况下精确测量调幅深度
2007 17th International Conference Radioelektronika Pub Date : 2007-04-24 DOI: 10.1109/RADIOELEK.2007.371483
S. Matejka
{"title":"Accurate AM Depth Measurement in the Presence of Angle Modulation","authors":"S. Matejka","doi":"10.1109/RADIOELEK.2007.371483","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2007.371483","url":null,"abstract":"This paper will attempt at giving an insight into accurate amplitude modulation depth measurement on condition that the signal source is simultaneously amplitude and angle modulated by a harmonic signal. The first major part of this paper is on the theoretical power spectrum and the amplitude modulation depth analysis of such modulated signals, where we restrict ourselves to a weak angle modulation. Then a technique for proper AM depth calculation is discussed in respect of random properties of measured signal. Finally, the modified way of amplitude modulation depth measurement in the frequency domain is briefly introduced and a special attention is given to variety of amplitude modulation depth calculation methods. The reviews of results based on \"classic \" AM depth measurement and on proposed method and calculations are also presented and, in particular, some pitfalls to avoid during measurement and calculation are covered.","PeriodicalId":446406,"journal":{"name":"2007 17th International Conference Radioelektronika","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123707528","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
Precipitation in Radio Communication 无线电通信中的降水
2007 17th International Conference Radioelektronika Pub Date : 2007-04-24 DOI: 10.1109/RADIOELEK.2007.371663
J. Bogucki
{"title":"Precipitation in Radio Communication","authors":"J. Bogucki","doi":"10.1109/RADIOELEK.2007.371663","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2007.371663","url":null,"abstract":"This paper covers unavailability of line-of-sight radio links due to rain. To evaluate the rain effects over a communication system, it is essential to know the temporal and spatial evolution of rainfall rate. Long-term 1-min average rain-rate characteristics necessary for the design of microwave radio links are determined for central Poland. 1-min rain rate distributions are presented. It also describes comparison results of predicted attenuation obtained from ITU-R formula and empirical data at frequencies 11.5 GHz and 18.6 GHz.","PeriodicalId":446406,"journal":{"name":"2007 17th International Conference Radioelektronika","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130586947","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
Single Phase Electricity Meter Based on Mixed-Signal Processor MSP430FE427 with PLC Modem 基于MSP430FE427混合信号处理器和PLC调制解调器的单相电能表
2007 17th International Conference Radioelektronika Pub Date : 2007-04-24 DOI: 10.1109/RADIOELEK.2007.371436
M. Majchrak, J. Heinrich, P. Fuchs, V. Hostýn
{"title":"Single Phase Electricity Meter Based on Mixed-Signal Processor MSP430FE427 with PLC Modem","authors":"M. Majchrak, J. Heinrich, P. Fuchs, V. Hostýn","doi":"10.1109/RADIOELEK.2007.371436","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2007.371436","url":null,"abstract":"An overview of single phase electronic electricity meter using the Texas Instruments mixed-signal processor MSP430FE42x with modem for communication via power line is given.","PeriodicalId":446406,"journal":{"name":"2007 17th International Conference Radioelektronika","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132867498","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: 11
GNSS Signals Characteristics GNSS信号特性
2007 17th International Conference Radioelektronika Pub Date : 2007-04-24 DOI: 10.1109/RADIOELEK.2007.371471
P. Kačmařík, P. Kovář
{"title":"GNSS Signals Characteristics","authors":"P. Kačmařík, P. Kovář","doi":"10.1109/RADIOELEK.2007.371471","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2007.371471","url":null,"abstract":"The paper deals with second order signals characteristics for satellite navigation systems. The main goal of the paper is to simplify and clarify signals analysis task by introducing a system of signals characteristics and their mutual relations. The conception of the system is based on the fact that the structure of navigation signals is partially given since the signals should ensure reliable pseudorange estimations. The proposed conception is then applied on the tiered code construction employed in Galileo system. Finally it is shown that the results of the tiered code analysis can be used in case of the power spectra estimation of BOC modulated signals.","PeriodicalId":446406,"journal":{"name":"2007 17th International Conference Radioelektronika","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132040487","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
The Use of Absorbing Layers in FDTD Simulations of Coaxial Structures 吸收层在同轴结构时域有限差分模拟中的应用
2007 17th International Conference Radioelektronika Pub Date : 2007-04-24 DOI: 10.1109/RADIOELEK.2007.371652
D. Stverka
{"title":"The Use of Absorbing Layers in FDTD Simulations of Coaxial Structures","authors":"D. Stverka","doi":"10.1109/RADIOELEK.2007.371652","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2007.371652","url":null,"abstract":"Absorbing layers play an important role in various numerical time domain simulations. Absorbing layers are an essential matter in FDTD simulations especially enabling simulations of an open area. The paper shows the PML (Perfectly Matched Layer) computations for rotational coordinates, and the simulation results are compared to the simple absorbing layer.","PeriodicalId":446406,"journal":{"name":"2007 17th International Conference Radioelektronika","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131296998","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
Comparison of Pulse and Continuous Wave Propagation Through the Wall 脉冲波与连续波通过墙体的比较
2007 17th International Conference Radioelektronika Pub Date : 2007-04-24 DOI: 10.1109/RADIOELEK.2007.371699
R. Sikl, D. Dvorak, J. Mrkvica, J. Jerabek
{"title":"Comparison of Pulse and Continuous Wave Propagation Through the Wall","authors":"R. Sikl, D. Dvorak, J. Mrkvica, J. Jerabek","doi":"10.1109/RADIOELEK.2007.371699","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2007.371699","url":null,"abstract":"Knowledge of UWB pulse propagation in and through walls is needed for precise structure analysis and radar sensing. In this paper some experimental results (insertion loss, delay) of pulse propagation through the wall are shown. The methodology of time domain measurement is presented as well. Attenuation of the same wall was measured also in frequency domain. Comparison of spectral components wall attenuation measured using time domain techniques and continuous wave measurements is also done. Dependency of signal delay and attenuation on wall-antennas distance is investigated.","PeriodicalId":446406,"journal":{"name":"2007 17th International Conference Radioelektronika","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123163898","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: 5
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