HIGH-FREQUENCY RCS OF PERFECTLY CONDUCTING OR COATED COMPLEX OBJECTS IN REAL TIME Juan M. Rius*, M. Vall-llossera*, Angel Cardama* ABSTRACT This paper presents a new and original approach to compute high-frequency radar cross section (RCS) of complex radar targets in real time usmg a 3-D graphic workstation. The aircraft is modelled with I-DEAS solid modeling software using a parametric surface a

OPTIMUM SIDELOBE UNBIASED PROBLEM ESTIMATION IN RADARS ALGORITHMS USING by FOR SOLVING WAVEFORMS THE RANGE EXPANDED Tobias Felhauer ABSTRACT 1) The conventional method of signal processing in the receivers of radar systems using expanded waveforms is based on filtering the received signal by a filter matched to the expanded waveform. This kind of signal processing is not optimum because o

CLASSIFICATION OF ROAD TRAFFIC FROM MICROWAVE PROFILES H. Roe- & G. S. Hobson-- ABSTRACT. A microwave system has been developed which can automatically classify vehicles in real time into at least five groups: cars, light goods, medium goods, heavy goods and buses (bicycles were too infrequent to be assessed) to accuracies of about 75%. The system is based on FMCW radar to derive range and it

(;!R()SS (P()llA\IRDZA\ lI"D()(N IPfEIRIf()(RDtA\INCIE «>IF \YD\VA\ILIDD A\lNlI"lElNlNA\S DIN OC lI"lRA\IHS\YIElRSIE1HA;lN1ElI"DC IFDIEILIDS A.D.Macedo Filho 1 ~M.M.Mosso ~. .£. ABSTRACT This paper presents the practical results and the conclusions of several experiments with printed vivaldi antennas under the influence of a strong dc magnetic field .the effects of such field over the p

LENS-TYPE MM-WAVES COMPACT ANTENNA TEST RANGE AT T. Hirvonen,J. Tuovinen,A. Raisanen1 ABSTRACT A lens-type compact antenna test range (CATR) has been studied both theoretically and experimentally. For a lens with low dielectric constant er, the surface accuracy requirement is much less stringent than for a reflector. An experimental CATR with a shaped polyethylene (er = 2.32) lens was made

AUTOKATION OF MULTIPLE FEED ANTBRNA SATELLITEANTEHNAS DESIGN FOR HIGH-SPECIFICATION D P Bacon * ABSTRACl This paper presents a method for optimising the feed sizes and positions of rectangular feed horns in an irregular array of differently sized feeds for a anlti-feed antenna. Thus, a generalised arrangement of such feeds can be automatically optimised towards a desired antenna farfield

Progress in the Design & Performance of Electronically Reconfigurable Reflector Antennas P.I.B. Clarricoats. H. Zhou and R.C. Brown Abstract: The paper describes recent experimental work on an electronically controlled mesh reflector antenna together with theoretical studies aimed at reducing the effects of pillowing. A mesh antenna with large transparent buttons shows promise as do two different

Design of a Low-Sidelobe Dual-Beam Antenna with High Cross-Over Level Akira KONDO. and Kenichi KAGOSHIMA. AhW:Kt This paper describes the reflector design and radiation characteristics of a dualbeam antenna which has a high cross-over level of adjacent beams and low sidelobe levels. To obtain the above objectives, the sub-reflector is enlarged in the horizontal plane and a new reflector-shaping t

EVANESCENT P. Nuechter*. MODE FILTERS WITH DIELECTRIC RESONATORS U. Bochtler**. F. Landstorfer** ABSTRACT An inverter representation for evanescent mode waveguide In combination with dielectric loaded waveguide sections filter design formulas can be applied. The design considers by incorporating negative line segments in the inverter. External coupling of waveguide and coaxial line is achi

800 MHz HIGH POWER BANDPASS FILTER USING TM DUAL MODE DIELECTRIC RESONATORS Youhei Ishikawa. Jun Hattori. Masamichi Andoh. Toshio Nishikawa* ABSTRACT A novel high power bandpass filter using TM110 dual mode dielectric resonators was developed. TM110 dual mode is achieved with dielectric resonators physically coupled in an asymmetrically orthogonal manner and these arrayed resonators are construc