SBMO International Microwave Conference/Brazil,最新文献

{"title":"Wide Band, Wide Temperature Operating Range Acousto-optical Spectrometer (A.O.S) For The Balloon Borne Pronaos Submillimetre Heterodyne Experiment.","authors":"C. Rosolen, D. Michet, C. Gac, A. Lecacheux","doi":"10.1109/SBMO.1993.589551","DOIUrl":"https://doi.org/10.1109/SBMO.1993.589551","url":null,"abstract":"In order to fulfill the scientific objectives of the Pronaos balloon borne SubMill imetre heterodyne experiment, we developed a wide band A.O.S. (bandwidth > 700 MHz) having very good stability over a large operating temperature range (loo to 40\"). The optimization of the frequency resolution of the spectrometer (B*T > 1000) was obtained in designing and building, in collaboration with Thomson-Sin tra, a new kind of Bragg cell in L i m o 3 (Y+123\" orientation) centered at 2 GHz. We described the new solutions that we have implemented for minimizing the size, weight and power of the device and for improving its reliability. All these improvements lead to a very simple and reliable device as well adapted for space experiments as for low cost, ground based applications.","PeriodicalId":219944,"journal":{"name":"SBMO International Microwave Conference/Brazil,","volume":"487 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122749543","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}

{"title":"An Experience Of Teaching Microwaves & Antennas In Novosibirsk Telecommunication Institute","authors":"B. Kapilevich","doi":"10.1109/SBMO.1993.589373","DOIUrl":"https://doi.org/10.1109/SBMO.1993.589373","url":null,"abstract":"","PeriodicalId":219944,"journal":{"name":"SBMO International Microwave Conference/Brazil,","volume":"65 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125953330","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}

{"title":"Reflection Properties Of Isotropic-Pseudochiral Interfaces","authors":"A. Toscano, M. Vaccari, L. Vegni","doi":"10.1109/SBMO.1993.587218","DOIUrl":"https://doi.org/10.1109/SBMO.1993.587218","url":null,"abstract":"In this paper we consider the trainsmission and reflection properties of a planar isotropic-pseudochiral interface under excitation condition of planar waves. The development of the solution is obtained by using the conventional boundary conditions in the transverse plane of the structure with respect to the normal axis of the interface plane. Several interesting characteristics of the reflected and transmitted plane waves have been obtained depending on the constitutive parameters and the pseudochirality admittance. Introduction and statement of the! electromagnetic problem The study of electromagnetic field propagating in complex (artificial) media, such as biisotropic chiral, anisotropic uniaxial, biaxial and gyrotropic ones, is a stimulating research topic for itis potential applications, namely in optics and millimeter wave frequency range. This is reflected in an increasing demand of rigorous theoretical models and efficient numerical tools, working at higher and higher frequencies for practical structures, as the planar integrated configuration with a dielectric slab, generally terminated on a ground plane or on an other unbounded medium. Therefore a first interesting problem is connected with the absorbing or reflecting properties of planar interfaces. Recently [l], a new type of synthetic material, called R (or pseudochiral) medium has been brought to the attention of the applied research. R medium is realized on a host isotropic material, where planar conducting microstructures, shaped as the Greek letter Q and with their stems oriented along the same axis, are embedded (Fig.1). K s Fig.1 Planar conducting microstructures of a medium. A magneto-electric coupling effect, due to the shape of the microstructures, is characteristic of such a mediurn and can be described by the appropriate 2-constitutive relations: D=E.E +goH and B=3;*E + 11.H; where E = + p y y ~ c ~ ~ , = & are (3x3) diagonal biaxial tensors, while z and have the expressions: z =-jp,,R,y^x ̂ P = jpyyRcxy. Rc is the pseudochiral admittance. Therefore besides the classical Eii, Pjj parameters the pseudochiral medium has an additional degree of freedom, given by a,. A h","PeriodicalId":219944,"journal":{"name":"SBMO International Microwave Conference/Brazil,","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130002887","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}

{"title":"New Formulations And Notations To Teach Vector Analysis","authors":"C. Tai","doi":"10.1109/SBMO.1993.589368","DOIUrl":"https://doi.org/10.1109/SBMO.1993.589368","url":null,"abstract":"","PeriodicalId":219944,"journal":{"name":"SBMO International Microwave Conference/Brazil,","volume":"117 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120884771","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}

{"title":"Use Of Microwave In The Satellite Positioning","authors":"D. Blitzkow, R. Schaal","doi":"10.1109/SBMO.1993.589541","DOIUrl":"https://doi.org/10.1109/SBMO.1993.589541","url":null,"abstract":"Since the launching of the first satellite, Sputnik I, it has been realized that a signal of microwave could be used for positioning, The first idea was to position the satellite. Immediately after the same idea has been throught to position an observer. As a consequence of that, a navigation system has been developed for the use of the U.S. Navy which is known by TRANSIT or NNSS (Navy Navigation Satellite System). The original system has been improved in order to provide sufficient accuracy for geodetic positioning. Several restrictions of this satellite system emphasized the necessity to develop a new idea for positioning and it came to the light what it is known by Global Positioning System (GPS). 1. Historical Introduction Radio portion of the electromagnetic spectrum found early use in satellite navigation. When the first artificial earth satellite has been launched by USSR in October 4, 1957, two Americans, W. H. Guier and G. C. Weiffenbach, realized that a microwave signal could be used to position the satellite. Originally, the main concern was with the space vehicle. Immediately after McClure suggested to use the same principle to position the observer, more precisely, the electric center of a receiver antenna. In this case the position of the satellite must be known. As a consequence John Hopkins University Applied Physics Laboratory developed a system for positioning using satellites that has been implemented by US Navy and it is known as TRANSIT or Navy Navigation Satellite System (NNSS).","PeriodicalId":219944,"journal":{"name":"SBMO International Microwave Conference/Brazil,","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126908259","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}

{"title":"A Triple Deck Ceramic Sringle Chip Package For High Frequency Communication Integrated Circuits","authors":"M. Bedouani","doi":"10.1109/SBMO.1993.587230","DOIUrl":"https://doi.org/10.1109/SBMO.1993.587230","url":null,"abstract":"High Frequency communication integrated circuits require specific packages with controlled impedance and very low attenuation. These IC’s use ECL like differential output gate structures. In this paper, we present full electrical design and experimental characterization of a high performance triple deck ceramic package based on shielded differential coplanar striplines used for (2-4 Gbitds) serial link circuits. Introduction Very high speed communication integrated circuits require specific packages with controlled impedance transmission lines and very low attenuation. High speed IC ‘s use differential gate structures: ECL Emitter Coupled Logic) and SCFL ( Source Coupled Eet Logic) respectively for silicon and GaAs technologies. We use a differential coplanar lines structure for high frequency packaging to avoid commutation noises and skew between the two output gate arms. On other hand, in order to have several isolated serial links in the: same edge of the chip, this structure is taken shielded. In cofired ceramic package techniques, conductors are made with tungsten paste (it’s resistivity is 14 times the copper resistivity). So, to reduce and control the conductor losses induced by the skin effects for high frequency applications, we use a shielded differential coplanar striplines [I] in 4.5 mm2 triple deck package (Figures 13). The minimum transmission line widht is 100 pm. Tapered lines are used to avoid impedance discontinuity ( the input and output pitches are respectively 300 pm and 1905 pm). The target characteristic impedances are SO Q and 100 Q respectively in single and differential modes. An analytical calculation method based on only simple transmission lines models is used for the electrical design of this structure. This analytical method is corraleted t o full 3D modelisation [ 21 and experimental characterization. Modelisation The scheme and the equivalent circuit model of the used shielded coplanar differential striplines are presented respectively in Figures 4 and 5. The L,Co,Cc and M parameters are determined by using a simple coupled lines models. The impedance of this structure is given by an analytical calculation : Zc=[ (L+M)/(CO+~C,)]~/~ and Zd=[ (L-M)/(C0+3Cc)] respectively in single and differential modes. L is the self inductance, CO is the plan capacitance, C, is the coupling capacitance and M is the mutual inductance. Comparison betweein analytical and 3D modelisation results are reported in Table 6. These results are very close within less than 5%. The influence of the ground transmission lines increases when the spacement between signal","PeriodicalId":219944,"journal":{"name":"SBMO International Microwave Conference/Brazil,","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116617242","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}

{"title":"Radar-ECM Simulation System","authors":"C. Oliveira, M. Grivet, F. Pantoja","doi":"10.1109/SBMO.1993.589545","DOIUrl":"https://doi.org/10.1109/SBMO.1993.589545","url":null,"abstract":"This paper presents a simulation system that deals with the analysis, monitoring, and evaluation of signals in the interaction of Radar and Electronic Counter Measure Systems (ECM). The computational system is modular and flexible and is aimed at the realistic description of the behavior of many modem radars, jamming and deception techniques. The final goal of the system is the graphical representation of the target range and velocity tracking features. Important and essential parameters for the evaluation of Radar Systems in the presence of ECM can therefore be characterized.","PeriodicalId":219944,"journal":{"name":"SBMO International Microwave Conference/Brazil,","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128099207","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}

{"title":"The Use Of The Finite-Difference Method For The Analysis Of The Coupling Between Anisotropic Dielectric Waveguides","authors":"C.L. da Silva Souza Sobrinho, A. Giarola","doi":"10.1109/SBMO.1993.587214","DOIUrl":"https://doi.org/10.1109/SBMO.1993.587214","url":null,"abstract":"The finite-difference method is used in the analysis of the propagation characteristics of coupled anisotropic dielectric waveguides. The theoretical development is based on the numerical solution of the wave equation, written in terms of the transverse components of the magnetiic field. As a result a conventional eigenvalue problem is obtained without the presence of spurious modes due to the implicit inclusion of the divergence of the magnetic field equal to zero. The general case of a biaxial anisotropic dielectric is considered, including a refractive index profile varying arbitrarily in the waveguide cross section.","PeriodicalId":219944,"journal":{"name":"SBMO International Microwave Conference/Brazil,","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128146562","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}

{"title":"Analysis Of A Planar M-way Radial Waveguidie Combiner/ Divider For The Case Of Arbitrary Excitation","authors":"M. Bialkowski","doi":"10.1109/SBMO.1993.589539","DOIUrl":"https://doi.org/10.1109/SBMO.1993.589539","url":null,"abstract":"","PeriodicalId":219944,"journal":{"name":"SBMO International Microwave Conference/Brazil,","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132016420","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}

{"title":"Biomedical Applications Of Optics. New Computer Aided Sensor Concepts For Nonimvasive Measurements Of Human Hemodynamics","authors":"V. Blazek","doi":"10.1109/SBMO.1993.589364","DOIUrl":"https://doi.org/10.1109/SBMO.1993.589364","url":null,"abstract":"The majority of practical applications of microwave energy in medicine is based on the transformation of this energy into heat. AS useful as this may be in certain medical applications (e.g. microwave hyperthermia for oncological therapy), this is an unwanted effect in the study of blood volume kinetics in the skin, as these measurements must be performed in a thermoregulated steady state. As the penetration depth and focussing of radiation is a func-","PeriodicalId":219944,"journal":{"name":"SBMO International Microwave Conference/Brazil,","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132937469","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}