Senai, Brazil;
نویسندگان
چکیده
This paper presents design and experimental validation of radiation performance of torroidal shaped mm wave reflector antenna to be used in NASA’s SIRICE mission. A near field amplitude-only measurement set up is described for experimental validation of radiation performance of mm wave torroidal shaped reflector antenna. A global optimization procedure, Particle Swarm Optimization (PSO) is described to estimate phase front of the measured near field . M06-2 09:10 Probe Based Radiation Pattern Measurements for Highly Integrated Millimeter-Wave Antennas Beer, S.; Zwick, T. Universitaet Karlsruhe, GERMANY This paper presents the existing measurement solutions for integrated millimeter-wave antennas as well as the novel measurement assembly at the authors’ institute. This setup allows probe based radiation pattern, gain and return loss measurements of antennas in the frequency range between 50 and 110 GHz. M06-3 09:30 Quasi Optical Circulator X-Band Scale Model Utilizing a Circular Polarization Frequency Selective Surface Fusco, Vincent; Euler, M Queens University Belfast, UNITED KINGDOM; QUB, UNITED KINGDOM A prototype X-band scale model for a quasi optical 3-port circulator utilizing a double-layer circularly polarizing frequency selective surface is proposed. The operating principles and measured characteristics of the device are discussed. A prototype device operating at 9.9 GHz is built and validated experimentally. M06-4 09:50 Wideband Millimetre Wave End-Fire Antenna and Array for Wireless Short-Range Applications Lamminen, A.; Saily, J. VTT Technical Research Centre of Finland, FINLAND A wideband 60 GHz end-fire antenna element and a 1x4 array suitable especially for mobile devices have been developed. For the single antenna, the measured gain is 3.1...7.1 dBi between 55-64 GHz. For the array, the measured gain is 7.0...9.5 dBi between 55-64 GHz. The antennas are manufactured on LTCC ceramic process and can be integrated with a radio module or flip-chip mounted on a mobile device circuit board. The sizes of antennas are only 3 mm x 4 mm x 0.27 mm and 12 mm x 5.5 mm x 0.27 mm. M06-5 Session: A30P1: Reflectarray 1 Type: Antennas Session Date: Friday, April 16, 2010 Time: 08:30 10:30 Room: Room 133-134 Chairs: R. Gillard M. Barba Time Title Abs No 08:30 "Pharmacist Cross" Phase-Shifting Cell Loaded with MEMS Switches for Reconfigurable Reflectarrays Salti, H.; Fourn, E.; Gillard, R.; Girard, E.; Legay, H. IETR, FRANCE; Thales Alenia Space, FRANCE This paper proposes a new MEMS based reconfigurable reflectarray cell. It is based on the "pharmacist cross topology". The number and position of MEMS switches in this cell are optimized in order to have a 360° phase range with a uniform distribution at the central frequency. This cell is then used as key element in a test-case reflectarray in order to assess its capabilities regarding bandwidth and MEMS capacitances uncertainty. A30P1-1 08:50 Analysis of a Reconfigurable Reflectarray Cell Comprising a Multitude of MEMS Control Elements Perruisseau-Carrier, J.; Girard, E.; Legay, H. Centre Tecnologic de Telecomunicacions de Catalunya (CTTC), SPAIN; Thalès Alenia Space, FRANCE This paper discusses the analysis of reflectarray cells comprising MEMS control elements. The method employed allows a fast and accurate analysis of the cell, quasi independently of the number of MEMS. It also allows computing useful design parameters such as the power dissipated in each MEMS. Based on this method, we present the analysis of a cell embedding a multitude of MEMS control elements, demonstrating for e.g. the intimate link between phase dispersion and loss. A30P1-2 09:10 Analysis of Parabolic Reflectarray in Dual-Reflector Configuration Tienda, C.; Arrebola, M.; Encinar, J.A.; Toso, G. ESA (ESTEC), NETHERLANDS; Universidad de Oviedo, SPAIN; Universidad Politécnica de Madrid, SPAIN A modular technique is presented in this paper for the analysis of a dual-reflectarray antenna configuration comprising a parabolic reflectarray as main reflector. The technique has been applied to analyse a single offset parabolic reflectarray designed previously to produce a South American coverage. The co-polar and cross-polar radiation patterns are shown, showing that the contoured beam is in close agreement with the predictions previously report A30P1-3 09:30 Design of a Wideband Single Layer Sub-reflectarray for Space Applications Chaharmir, MR.; Shaker, J.; Legay, H.; Bresciani, D. Communications Research Centre (CRC), CANADA; Thales-Alenia Space, FRANCE A single-layer reflectarray operating as sub-reflector of a dual-reflector configuration was designed for shaped beam application at Ku-band. An optimization method was utilized in the design of the reflectarray to achieve a broad bandwidth of 11 GHz – 14.5 GHz. Double cross loop elements were used as reflectarray elements. The calculated radiation patterns at the centre and extreme frequencies meet the required specifications closely. A30P1-4 09:50 Electronically Switchable-Beam Reflectarray Antenna Carrasco, E.; Barba, M.; Encinar, J. UNIVERSIDAD POLITECNICA DE MADRID, SPAIN The design of a two-beam electronically switchable reflectarray based on patches aperture-coupled to delay lines is presented. The antenna switches the beam from –5 deg. to +5 deg. in the switching plane. The phase-shift control is performed using a SPST switch implemented with a series PIN diode. The number of diodes, as well as their biasing lines has been reduced to a half by using the concept of gathered elements. The final breadoboard mask for the phase-shifter layer is also shown. A30P1-5 10:10 Reconfigurable Active Reflector Based on High Impedance Surface Ratajczak, Philippe; Baracco, J.M.; Brachat, P.; Fargeas, J.M. Orange Labs, FRANCE; Mardel, FRANCE In this paper, the manufacturing and testing of a prototype concluding the development of a waveguide fed active antenna using an active High Impedance Surface (HIS) as main reflector are reported. The capability of such an antenna to generate various types of radiation beam (focalised, scanned...) has been demonstrated. A30P1-6 Session: C10P2: Analysis and synthesis of large conformal arrays on complex structures 2 Type: Convened Session Date: Friday, April 16, 2010 Time: 11:00 13:00 Room: Room 119 Chairs: P. Pathak Z. Sipus Time Title Abs No 11:00 Influence of the Finite Conductivity on RLSA Antenna Design Albani, M.; Mazzinghi, A.; Freni, A. University of Siena, ITALY; University of Florence, ITALY We consider the effect of the finite conductivity on the design of a radial line slot array (RLSA). Such an effect can be not negligible at high frequencies, especially when low cost metallization techniques are adopted. We extend the analytical evaluation of the dyadic admittance Greenâ€TMs function to the case of a low, arbitrary impedance surface, and we use it within a Method of Moment (MoM) for RLSA. The results have been tested those by commercial codes for different conductivity values. C10P2-1 11:20 Green's Function Approach for Interfacing UTD with FEM for a Conformal Array Antenna on a Large Platform Burkholder, Robert; Kim, Youngchel; Pathak, Prabhakar H.; Lee, Jin-Fa Ohio State University, UNITED STATES A hybrid interface method is presented for analyzing complex array antennas mounted on a large platform. The antenna is characterized using the finite element method, and the radiation from the antenna is computed in the presence of the platform using the uniform geometrical theory of diffraction (UTD). This approach may be applied to computing the radiation pattern of the antenna, the coupling to other antennas on the same platform, or the scattering from the platform back into the antenna. C10P2-2 11:40 Experimental Investigation of a Smoothly Curved Antenna Array on a UAV-Nose Mock-up Pettersson, L.; Gunnarsson, R.; Lundén, O.; Leijon, S.; Gustafsson, A. Swedish Defence Research Agency, SWEDEN The experimental evaluation of a conformal, smoothly curved, microstrip array mounted on a structure representing the nose section of a small UAV is reported and discussed. The array consists of 35×7 singlepolarized probe fed Ku-band patch elements for 16–18 GHz. Embedded element patterns as well as their mean values and standard deviations are presented. A comparison with a previously studied faceted conformal array which used identical elements, is also made. C10P2-3 12:00 Efficient Design of Finite Conformal Antenna Arrays Using VSIE Formulation and P-FFT Method. Xiao, K.; Li, L. W.; Zhao, W. J.; Chai, S.-L.; Mao, J.-J. National University of Defense Technology, CHINA; National University of Singapore, SINGAPORE A rigorous and effective analysis of finite conformal microstrip antenna array of arbitrary shape is presented using volume-surface integral equation (VSIE) formulation and Precorrected-fast fourier transform method (P-FFT) method where combined conducting and dielectric materials are considered. Three typical conformal arrays including cylindrical, spherical and conical arrays with thin dielectric sheets are considered. Microstripline and probe feed methods are used to excite the arrays. C10P2-4 Session: C23P2: Numerical Methods 2 Type: Convened Session Date: Friday, April 16, 2010 Time: 11:00 13:00 Room: Room 121 Chair: R. Mittra Time Title Abs No 11:00 Evaluating the Singular Integrals Arising in MPIE Formulations with a Double-Exponential Algorithm Polimeridis, Athanasios G.; Mosig, Juan R. LEMA-EPFL, SWITZERLAND Novel generalized Cartesian product rules for the computation of weakly singular integrals, arising in the mixed potential integral equation formulations are presented in this paper. The key feature of the proposed integration schemes lies in the incorporation of the double exponential quadrature rule, originally developed by Takahasi and Mori in the mid-seventies for the integration of functions with singularities at the endpoints of the associated integration interval. C23P2-1 11:20 Orthogonal Basis Functions for the Discretization of the Magnetic-field Integral Equation in the Low Frequency Regime Ubeda, Eduard; Tamayo, Jose M; Rius, Juan M Technical University of Catalonia, SPAIN We compare the RCS accuracy of the Method of Moments discretization of the Magnetic-field Integral Equation with two types of orthogonal facet-oriented basis functions: (i) a recently proposed zero-order set and (ii) a novel first-order set. We show their performance when compared with the discretization in Method of Moments of the Electric-field and the Magnetic-field Integral equations with low-order div-conforming sets and for different meshings (triangular, quadrilateral and combined). C23P2-2 11:40 EDXCompanion Tools and other 2nd year developments Sabbadini, Marco; Frandsen, P.E.; Ghilardi, M.; Vandenbosch, G.A.E ESA-ESTEC, NETHERLANDS; TICRA, DENMARK; ITLink, ITALY; Katholieke Universiteit Leuven, BELGIUM This paper presents the status of the Electromagnetic Data eXchange (EDX). The EDX is a core activity under the Working Group on Software of the European Association on Antennas and Propagation (EurAAP). Recent new developments and free software tools are discussed and a new Data Dictionary language for electromagnetic dictionaries is introduced. C23P2-3 12:00 New results from the SoftLAB benchmark of antenna software Rolland, Anthony; Gillard, Raphaël; Sauleau, Ronan; Eberhard, Jens; Rius, Juan M.; Cappellin, Cecilia; Vandenbosch, Guy IETR, University of Rennes 1, FRANCE; Institut d'Electronique et de Télécommunications de Rennes (IETR), FRANCE; CST, GERMANY; UPC, SPAIN; TICRA, DENMARK; KUL, BELGIUM This paper gives an overview of the antenna software benchmarking activity that took place within the Software Group of the EurAAP association in 2009. A particular focus is brought to one of the proposed test case that consists of a non conventional horn antenna. C23P2-4 Session: A26P2: UWB antennas 2 Type: Antennas Session Date: Friday, April 16, 2010 Time: 11:00 13:00 Room: Room 122-123 Chairs: J. Costa G. Valerio Time Title Abs No 11:00 A 433 MHz – 22 GHz Reconfigurable Dielectric Loaded Biconical Antenna Ott, Arndt; Eibert, T. F. Technische Universitaet Muenchen, GERMANY A reconfigurable ultra-wideband (UWB) biconical antenna is presented. It exhibits a bandwidth of 433 MHz-22 GHz due to a specially shaped dielectric placed between the two cones. Different flanges can be connected to the antenna to increase the frequency range. The radiation pattern has a constant main direction and changes its shape only slightly over the entire frequency range. Furthermore the antenna offers an excellent transient behavior. A26P2-1 11:20 A New Multifunctional UWB Planar Antenna Based on Printed Dipoles in Rhombic Configuration Mazzocchi, Simona; Valerio, G.; Zucca, M.; Ciattaglia, M.; De Luca, A.; Galli, A. Sapienza University of Rome, ITALY; Selex Sistemi Integrati, ITALY In this paper a new simple and low-cost radiating element is presented, based on a multilayered planar configuration with printed dipoles arranged in a rhombic shape. The main objective is to reach UWB performance in the C-X bands, with good matching and fairly regular radiation patterns in different frequency regions. The feeding and radiating features of the antenna element are extensively analyzed and also optimized as concerns the matching features by means of different numerical procedures. A26P2-2 11:40 Investigation of a Crossed Exponentially Tapered Slot Printed Antenna for UWB Ranging R. Costa, J.; R. Medeiros, C.; A. Fernandes, C. Instituto Telecomunicacoes ISCTE, PORTUGAL; Instituto Telecomunicacoes IST, PORTUGAL This paper presents a compact printed antenna for UWB ranging over the 3.1-10.6 GHz band. The radiation pattern and polarization are very stable over the entire band. Preliminary line-of-sight (LOS) ranging measurements are performed and range information is extracted from the pulse signal time delay. The antenna link performance is measured, presenting very low pulse distortion effects. Early results demonstrate accurate position estimation from measurements performed in different scenarios. A26P2-3 12:00 New Method for Design implementation of Vivaldi Antennas to Improve its UWB Behavior Javashvili, Otar; Andersson, Daniel Radarbolaget AB, GEORGIA; Radarbolaget AB, SWEDEN The project was done as a Master's thesis at University of Gavle with colaboration of the Radio Center Gavle and Radarbolaget AB. Otar Javashvili A26P2-4 12:20 Statistical Models of Wideband and UWB Omnidirectional Antennas Based on Parametric Modeling. ROBLIN, Christophe; YOUSUF, Muhammad Amir ENSTA, FRANCE The need for antenna models, devoted to various simulation tools (e.g. ray tracing, radio linklevel, etc.) is more and more topical. This is especially true for UWB systems, because of higher complexity of antenna representation. The great diversity of the situations (radiators, close environment, fabrication dispersion, etc.) suggests a statistical approach of the problem. A statistical analysis of the radiation of a population of omni antennas based on a parametric modelling is proposed her. A26P2-5 12:40 Switched UWB to Narrowband Planar Monopole Antenna Ghanem, F.; Kelly, J.; Hall, P.S. University of Sheffield, Department of Electronic & Electrical Engineering, Mappin Street, Sheffield, UNITED KINGDOM; School of Electronic, Electrical & Computer Eng., University of Birmingham, Edgbaston, Birmingham, B, UNITED KINGDOM Reconfigurable antennas will be required for future mobile systems. This paper presents a multi-switched standard antenna. The antenna is based around a planar monopole and it is fed via a single stage parallelcoupled line filter. By using 4 microwave switches, within the resonator, it is possible to switch between wide and narrowband operation. With the aid of a further 6 switches, it is possible to vary the narrowband operating frequency. A26P2-6 Session: C17P2: Research projects in satellite applications 2 Type: Convened Session Date: Friday, April 16, 2010 Time: 11:00 13:00 Room: Room 125 Chairs: R. Jørgensen F. Jensen Time Title Abs No 11:00 Lightweight Intersatellitelink Antenna (LISAMS) operating at Ka-Band Nathrath, N.; Truemper, M.; Purschke, R.; Harder, J.; Wolf, H. NTP Netzwerk Technischer Partner, GERMANY; TU München, GERMANY; Astrium GmbH, GERMANY Since 2008 the lightweight intersatellitelink antenna (LISAMS) has been developed for establishing communication between low flying satellites (e.g. earth observation satellites) and geostationary relay satellites. For this development a detailed electrical design has been simulated to predict performance parameters. The paper describes the detailed component design and the comparison of the simulated values with measurements from manufactured breadboard antenna model. C17P2-1 11:20 Perspectives for Mobile Satellite Communications in Ka-Band (MOSAKA) Hein, Matthias; Bayer, H; Krauss, A; Stephan, R; Volmer, C; Heuberger, A; Eberlein, E; Keip, C; Mehnert, M.; Mitschele-Thiel, A; Driess, P; Volkert, T Ilmenau University of Technology, GERMANY; Fraunhofer IIS, GERMANY The German Heinrich Hertz mission signalises the growing interest in nomadic and mobile Ka-band satellite communications. The project MoSaKa adresses the ground segment required for such missions, in terms of bidirectional non-stationary communication links in a heterogeneous emergency network. Issues like terminal antennas, communication links and protocols, and a specific measurement testbed are addressed by an interdisciplinary consortium of electronic engineers and computer scientists. C17P2-2 11:40 The German Heinrich Hertz Satellite Mission Voigt, Siegfried DLR, GERMANY This contribution gives an overview of the German satellite communication mission, called Heinrich Hertz Satellite Mission. The main project goal is a technology verification and qualification of various innovative technologies over an operation time of 15 years in the geostationary orbit. Amongst others this mission will re-establish the satellite and payload prime know-how for German space companies. The verification payload and the antenna developments are focused on Ka-Band. C17P2-3 12:00 Active Antenna Arrays at Ka-Band: Status and Outlook of the SANTANA Project Holzwarth, Sybille; Jacob, Arne; Dreher, Achim; Hunscher, Christian; Fischer, Horst; Stark, Alexander; Rohrdantz, Benjamin; Geise, Alexander; Kuhlmann, Karsten; Gieron, Roman; Litschke, Oliver; Lohmann, Dirk; Simon, Winfried; Buchner, Peter; Heckler, Marcos; Greda, Lukasz IMST GmbH, GERMANY; TU Hamburg-Harburg, GERMANY; DLR, GERMANY; Astrium GmbH, GERMANY; Tu Hamburg-Harburg, GERMANY This paper gives an overview on different research activities on electronically steerable antennas at Ka-band within the framework of the SANTANA project. In addition, it gives an outlook on future objectives, namely the perspective of testing SANTANA technologies with the projected German research satellite “Heinrich Hertz”. C17P2-4 12:20 A Multibeam Antenna for Data Relays for the German Communications Satellite Heinrich-Hertz Greda, L. A.; Knuepfer, B.; Knogl, J. S.; Heckler, M. V. T.; Bischl, H.; Dreher, A. German Aerospace Center (DLR), GERMANY; Technische Universität München (TUM), GERMANY This paper presents a concept of a novel Ka-band receiving multibeam antenna that can be used for high-rate data relays between a GEO satellite and several LEO satellites. The antenna is a payload candidate for the German communications satellite Heinrich-Hertz that is intended to be launched in 2014. First numerical results assessing the radiation characteristics and performance of the proposed antenna are given. C17P2-5 Session: A31: New materials Type: Antennas Session Date: Friday, April 16, 2010 Time: 11:00 13:00 Room: Room 127 Chairs: F.J. Ferrer K. Mahdjoubi Time Title Abs No 11:00 Attenuation of Magnetoplasma in Semiconductor Periodic and Quasi-Periodic Layered Waveguides Olkhovskiy, Y.; Shramkova, O. Kharkiv National Pedagogical University, UKRAINE; Institute of Radiophysics and Electronics of the NAS of Ukraine, UKRAINE A study is made of the TM-wave propagation in periodic and quasiperiodic layered waveguide composed of alternating layers of semiconductor and dielectric in a magnetic field. The dispersion dependencies for a finite periodic and quasiperiodic media are obtained. The effect of the dissipation processes on the wave dispersion is considered. The dependence of the minimum phase velocity on the collision frequency, the magnetic field strength and the thicknesses of the layers is studied. A31-1 11:20 Epoxy Bonded Ferrimagnetic Compounds as Patch Antenna’s Substrate Zervos, Theodore; Alexandridis, A.A.; Lazarakis, F.; Stamopoulos, D.; Pissas, M.; Dangakis, K. Institute of Informatics & Telecommunications, National Centre for Scientific Research “Demokritos”, GREECE; Institute of Materials Science, National Centre for Scientific Research “Demokritos”, GREECE The use of an epoxy bonded ferrimagnetic compound, Yttrium Iron Garnet (YIG), as a substrate of a patch antenna in Ku band is studied. We investigate its influence on the antenna's polarization properties under the application of an external magnetic field. It is proved that the axial ratio and also the sense and the tilt of the antenna polarization ellipse are influenced since they change in respect to the direction and the magnitude of an externally applied magnetic field. A31-2 11:40 Ferrimagnetic Composites in Building Material for Electromagnetic Wave Absorption Wireless Communication Systems Pretorius, Johann; Maharaj, B.T. University of Pretoria, SOUTH AFRICA Magnetic material is mixed with plaster cement to form a composite magnetic building material for electromagnetic wave (EMW) attenuation in indoor wireless communication systems. Samples were prepared as tiles and placed in the propagation path of the EMW between two broadband horn antennas. The attenuation capability of the samples was determined as the relative path loss between the antennas. Attenuation of the EMW of 8-12 dB were measured. A31-3 12:00 Performance Enhancement of Salisbury Screen Absorber using A Resistively Loaded High Impedance Ground Plane Che Seman, Fauziahanim; Cahill, Robert; Fusco, Vincent Queens University Belfast, UNITED KINGDOM In this paper we use numerical predictions to show that a Salisbury screen absorber backed by a high impedance ground plane can be designed to give a -10 dB reflectivity bandwidth which exceeds 100% when operated at angles of incidence up to 40o. A major advantage of this design methodology is that the enhanced bandwidth performance and insensitivity to angle of incidence is obtained without the need to increase the physical thickness of the structure. A31-4 12:20 Plasma Capillary Application to Switchable and Tunable EBG Coupler Varault, Stefan; Bolioli, Sylvain; Sokoloff, Jerome ONERA, FRANCE; LAPLACE-CNRS, FRANCE We present in this study the application of a plasma capillary used as a point defect between two waveguides. By varying the intensity at the capillary electrodes, the resonance frequency of the point defect can be tuned in order to couple energy at the desired frequency. A31-5 12:40 Printed Antennas over Lossy Magneto-Dielectric Substrates NIAMIEN, Constant; COLLARDEY, Sylvain; MAHDJOUBI, Kouroch Institue of Electronic and Telecommunication of Rennes, FRANCE Printed antennas over lossy truncated magneto-dielectric materials are investigated using the cavity model. Some useful design formulas have been proposed for calculating the patch antenna radiation efficiency and bandwidth. It has been shown that the patch performances are better when the magneto-dielectric substrate is chosen such that the permeability is greater than the permittivity. A31-6 Session: A33: EBG Type: Antennas Session Date: Friday, April 16, 2010 Time: 11:00 13:00 Room: Room 129 Chairs: J.M. Gonzalez-Arbesú
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تاریخ انتشار 2010