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RF Field Orientation Influence on the Specific Absorption Rate in a Biological Object 射频场方向对生物物体特定吸收率的影响
2008 14th Conference on Microwave Techniques Pub Date : 2008-04-23 DOI: 10.1109/COMITE.2008.4569938
E. Cocherová, J. Surda, O. Ondrácek, V. Stofanik
{"title":"RF Field Orientation Influence on the Specific Absorption Rate in a Biological Object","authors":"E. Cocherová, J. Surda, O. Ondrácek, V. Stofanik","doi":"10.1109/COMITE.2008.4569938","DOIUrl":"https://doi.org/10.1109/COMITE.2008.4569938","url":null,"abstract":"The influence of radio-frequency (RF) field orientation on specific absorption rate (SAR) in a human body is investigated in this paper. Three basic field orientations have been simulated: electric field vector, magnetic field vector and Poynting vector parallel to the longitudinal axis of a human body. The influence has been investigated in frequency range from 10 MHz to 2450 MHz with assistance of CST Microwave Studio program environment. Here the homogeneous ellipsoid, as a human body model, is irradiated by plane wave, representing far-field zone of antenna.","PeriodicalId":306289,"journal":{"name":"2008 14th Conference on Microwave Techniques","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125713450","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
An Iterative Microwave Breast Cancer Detection Method 一种迭代微波乳腺癌检测方法
2008 14th Conference on Microwave Techniques Pub Date : 2008-04-23 DOI: 10.1109/COMITE.2008.4569913
F. Seydou, T. Seppanen
{"title":"An Iterative Microwave Breast Cancer Detection Method","authors":"F. Seydou, T. Seppanen","doi":"10.1109/COMITE.2008.4569913","DOIUrl":"https://doi.org/10.1109/COMITE.2008.4569913","url":null,"abstract":"In this paper we consider the problem of tumor detection in the breast by microwave imaging system. Our method is based on boundary integral equation and iterative solution of a functional. We describe the method and show numerical results with synthetic data","PeriodicalId":306289,"journal":{"name":"2008 14th Conference on Microwave Techniques","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127901105","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
Using Global Optimization Approaches to Reconstruct Radiation Patterns 利用全局优化方法重建辐射模式
2008 14th Conference on Microwave Techniques Pub Date : 2008-04-23 DOI: 10.1109/COMITE.2008.4569933
J. Puskely, Z. Nováček, M. Pokorny
{"title":"Using Global Optimization Approaches to Reconstruct Radiation Patterns","authors":"J. Puskely, Z. Nováček, M. Pokorny","doi":"10.1109/COMITE.2008.4569933","DOIUrl":"https://doi.org/10.1109/COMITE.2008.4569933","url":null,"abstract":"The paper deals with the reconstruction method of the radiation pattern of directional antennas. The method is based on the amplitude near-field measurement (or simulation) on two plane surfaces, and consists of two steps. First, a global optimization is used to find an initial estimation. Second, a common Fourier iterative algorithm is created to iteratively improve the initial estimation. The genetic algorithm and the particle swarm optimization were chosen to determine the initial estimation. Their comparison was carried out on the radiation pattern reconstruction of the GSM-900 antenna.","PeriodicalId":306289,"journal":{"name":"2008 14th Conference on Microwave Techniques","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126764827","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
Development of a Versatile Planar Periodic Structure Simulator in MATLAB 基于MATLAB的通用平面周期结构模拟器的开发
2008 14th Conference on Microwave Techniques Pub Date : 2008-04-23 DOI: 10.1109/COMITE.2008.4569956
S. Goňa, V. Kfesdlek
{"title":"Development of a Versatile Planar Periodic Structure Simulator in MATLAB","authors":"S. Goňa, V. Kfesdlek","doi":"10.1109/COMITE.2008.4569956","DOIUrl":"https://doi.org/10.1109/COMITE.2008.4569956","url":null,"abstract":"This article describes development of a versatile periodic structure simulation program. The program is written in Matlab and performs analysis of a planar multilayer frequency selective surfaces by method of moments. Analysis reflection/transmission from a FSS compromised from arbitrarily shaped metal elements and having several dielectric layers is possible. The biggest advantage of the program compared to some commercial EM codes is in easier motif definition of complex structures and is thus suitable for researchers in the area of metamaterials. Due to its design in Matlab most common tasks like parametric design and optimization may be implemented easily.","PeriodicalId":306289,"journal":{"name":"2008 14th Conference on Microwave Techniques","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115842472","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: 6
Linearized Power Detector with 32-bit RISC Microprocessor for 2.45 GHz ISM Band 线性化功率检测器与32位RISC微处理器为2.45 GHz ISM波段
2008 14th Conference on Microwave Techniques Pub Date : 2008-04-23 DOI: 10.1109/COMITE.2008.4569886
Z. Brezović
{"title":"Linearized Power Detector with 32-bit RISC Microprocessor for 2.45 GHz ISM Band","authors":"Z. Brezović","doi":"10.1109/COMITE.2008.4569886","DOIUrl":"https://doi.org/10.1109/COMITE.2008.4569886","url":null,"abstract":"Design procedure and experimental verification of linearized power detector, suitable for measurement purposes, are presented. Good linearity, fast response and wide dynamic range of the detector are achieved by using a zero-bias Schottky diode with 16-bit analog to digital converter and 60 MHz 32-bit RISC processor. Linearity error better than plusmn 2 % has been achieved in 40 dB dynamic range with 3 ms repetition time.","PeriodicalId":306289,"journal":{"name":"2008 14th Conference on Microwave Techniques","volume":"46 23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116668998","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
Planar Spiral Applicator for Local Microwave Thermotherapy 局部微波热疗用平面螺旋涂敷器
2008 14th Conference on Microwave Techniques Pub Date : 2008-04-23 DOI: 10.1109/COMITE.2008.4569941
O. Rychlik, J. Vrba
{"title":"Planar Spiral Applicator for Local Microwave Thermotherapy","authors":"O. Rychlik, J. Vrba","doi":"10.1109/COMITE.2008.4569941","DOIUrl":"https://doi.org/10.1109/COMITE.2008.4569941","url":null,"abstract":"Nowadays microwave thermotherapy belongs to methods of treatment for cancer diseases. This method is often used in combination with classical therapies, which brings more success during treatment of tumors. The area is heated by microwave energy through microwave applicator. This paper deals with design, modelling and testing of planar spiral type of applicator for local microwave thermotherapy.","PeriodicalId":306289,"journal":{"name":"2008 14th Conference on Microwave Techniques","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116227649","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
Design of SMA 50 Ω Load Using 3D EM Field Simulator: Comparison with Reality 基于三维电磁场模拟器的SMA 50 Ω负载设计:与现实的比较
2008 14th Conference on Microwave Techniques Pub Date : 2008-04-23 DOI: 10.1109/COMITE.2008.4569951
M. Randus, K. Hoffmann
{"title":"Design of SMA 50 Ω Load Using 3D EM Field Simulator: Comparison with Reality","authors":"M. Randus, K. Hoffmann","doi":"10.1109/COMITE.2008.4569951","DOIUrl":"https://doi.org/10.1109/COMITE.2008.4569951","url":null,"abstract":"The subject of this paper is to provide a comparison of 3D EM field simulation results of 0603 size SMD resistors with corresponding real data obtained by precise vector measurements. The simulated results were obtained by 3D EM field simulator CST Microwave Studio with time-domain solver. The comparison is shown on a design of an optimized 50 Omega load composed of a common SMA flange connector and a set of 0603 size SMD resistors. The resistors are soldered between the inner conductor of the coaxial SMA connector and the flange. Several arrangements of the SMD resistors ranging from single-resistor arrangement to four-resistor pattern as well as different orientation of the resistive layer of the SMD resistors are discussed. Step discontinuity of the inner conductor of a real SMA connector is subsequently also involved in 3D EM field simulation and these results are compared with precise vector measurements.","PeriodicalId":306289,"journal":{"name":"2008 14th Conference on Microwave Techniques","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116608311","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
Polarization Rotator - Analysis and Design 偏振旋转器-分析与设计
2008 14th Conference on Microwave Techniques Pub Date : 2008-04-23 DOI: 10.1109/COMITE.2008.4569891
R. Lech, Jerzy Mazur
{"title":"Polarization Rotator - Analysis and Design","authors":"R. Lech, Jerzy Mazur","doi":"10.1109/COMITE.2008.4569891","DOIUrl":"https://doi.org/10.1109/COMITE.2008.4569891","url":null,"abstract":"This paper presents a new analysis of a polarizer composed of N sections of frequency selective surfaces (FSS). Each FSS is composed of periodic array of conducting wires. The structure is analyzed with the use of the exact full-wave theory based on the the mode-matching method, and also an efficient numerical technique based on the T- matrix approach and the lattice sums is utilized to investigate the FSSs.","PeriodicalId":306289,"journal":{"name":"2008 14th Conference on Microwave Techniques","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130029385","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
Influence of Directivity Pattern of Bilog Antenna to Radiated EMI Measurement Uncertainty 天线指向性方向图对辐射电磁干扰测量不确定度的影响
2008 14th Conference on Microwave Techniques Pub Date : 2008-04-23 DOI: 10.1109/COMITE.2008.4569924
M. Bittera, K. Kovac, V. Smiesko, J. Hallon
{"title":"Influence of Directivity Pattern of Bilog Antenna to Radiated EMI Measurement Uncertainty","authors":"M. Bittera, K. Kovac, V. Smiesko, J. Hallon","doi":"10.1109/COMITE.2008.4569924","DOIUrl":"https://doi.org/10.1109/COMITE.2008.4569924","url":null,"abstract":"EMC test houses are obliged to derive the uncertainty budget of their measurements. One of these measurements is radiated EMI measurement. Selection of the receive antenna is an important uncertainty source in such a measurement. Choice of Bilog antenna instead of half-wave dipole is convenient due to its broadband properties, but it can influence the total uncertainty of the measurement. Bilog antenna is directional antenna; its directivity pattern (normalized radiation pattern) is different to the dipole's one. Because all the theoretical calculations consider a dipole and its properties, the use of Bilog can cause additional error, which increases the measurement uncertainty. Analysis of this influence is the aim of this paper.","PeriodicalId":306289,"journal":{"name":"2008 14th Conference on Microwave Techniques","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128950376","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 UWB Amplifier 3.1-10.6 GHz UWB放大器3.1-10.6 GHz
2008 14th Conference on Microwave Techniques Pub Date : 2008-04-23 DOI: 10.1109/COMITE.2008.4569953
J. Vancl, V. Sokol, P. Černý, Z. Škvor
{"title":"The UWB Amplifier 3.1-10.6 GHz","authors":"J. Vancl, V. Sokol, P. Černý, Z. Škvor","doi":"10.1109/COMITE.2008.4569953","DOIUrl":"https://doi.org/10.1109/COMITE.2008.4569953","url":null,"abstract":"The general principle of an ultra-wideband (UWB) amplifier design in the planar structure using the common available monolithic amplifier is proposed in this paper. The structure of the amplifier is designed in order to accomplish the conditions of the transmission of UWB impulses (flat gain and constant group delay over FCC approved frequency band) with a minimum distortion. The roll-of stage is used for the compensation of the declining gain and biasing of the monolithic amplifier. The demonstration of the distortion and the assessment criteria of distortion are also presented. The experimentally manufactured amplifier demonstrates a gain of 7.1plusmn0.6 dB and a group delay variation of 7 ps from 4 to 9.3 GH and 25 ps over the whole band.","PeriodicalId":306289,"journal":{"name":"2008 14th Conference on Microwave Techniques","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123392153","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
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