AN S-BAND PLL FREQUENCY SYNTHESIZER FOR AGILE RADAR QIN SHI, JU YAOMING.* ABSTRACT This paper discusses the design of microwave frequency synthesizers, using PLL with fast switching and low phase noise, which can be used for radars and other microwave systems. The method of design, which considers compatibly the switching time and phase noise, is straightforward. A formula for evaluating fr

ARCHITECTURE AND DESIGN CRITERIA FOR SPACE-BASED SURVEILLANCE RADAR G. Galati * - G. Losquadro ** ABSTRACT The architecture and the basic design criteria of a space-based surveillance system using primary and secondary radars from a low elevation i.e. solved phased prime by orbit fully are described. data rate, with exploiting the It is felt that the main of system problems, can be adapt

A MILLIMETER-WAVE LOW-RANGE RADAR ALTIMETER FOR HELICOPTER APPLICATIONS SYSTEM DESIGN - M. Lange, J. Detlefsen, M. Bockmair, U. Trampnau * ABSTRACT A 35 GHz high resolution helicopter altimeter using the FMCW principle is described, which gives precise height information especially in the region close to ground. The system uses full digital data processing including the FM sweep linearisati

A Pseudo Noise Modulated CW-Radar With SAW-Convolver For Signal Processing W. Knapp and B. Wigger Abstract An important restriction to a broader application of continuous wave radar systems for long-range measurement is their inherent sensitivity against strong nearby reflections. These often cause a receiver saturation and thus make target detection impossible. One approach to optimize the sig

FREQUENCY SELECTIVE REFLECTOR ANTENNAS. SURFACES IN DUAL AND TRIPLE BAND OFFSET L. E. Comtesse, R. J. Langley, E. A. Parker and J. C. Vardaxoglou* ABSTRACT Two frequency selective subreflectors with Jerusalem cross or double square elements are used in cascade to give a dual/triple band feed system at 28, 14 and 6 GHz. Their performance in this configuration is described. 

A MULTTI-OCTAVE MILLIMETRE WAVE FOCOSING ANTENNA F Medeiros and N Williams ABS'!'RACT The paper describes the design of a linearly polarised focusing antenna capable of operating between 18 GHz and 80 GHz. The antenna is part of a multi-octave millimetre wave reflectometer which is being developed as a plasma diagnostic system for use with the Joint European Torus (JET) at Abingdon, Engla

18-40 GHz SPIRAL ANTENNA T.E. Morgan* ABSTRACT The development of an 18-40 GHz spiral antenna is described. Its output, which is in line with its axis, is in double ridged waveguide WRD180C24. The antenna has an aperture diameter of 12mm which is increased to 16mm with the addition of an integral radome. Its overall length, including the radome, is 48mm. The antenna and radome together weigh on

A BROAD ANGULAR COVERAGE AND LARGE BANDWIDTH ANTENNA. * G. DUBOST, M. NICOLAS ** ABSTRACT An antenna with several beams which could be electronically selected is described. In azimuth a large angular sector is covered and could be extended to 360 degrees. The antenna is composed of several arrays of flat dipoles located on a printed circuit which is wrapped around a cylindrical special diele

COMPUTER AIDED DESIGN OF OPTIMUM E- OR H-PLANE N-FURCATED WAVEGUIDE POWER DIVIDERS J. Dittlo££. J. Bornemann, and F. Arndt ABSTRACT Compact low-insertion-loss E- or H-plane n-furcated waveguide power dividers are designed with the method of field expansion into eigenmodes. As the finite septa thicknesses as well as the higher order mode interaction between all step discontinuities are rigorously

REALIZATION OF INTEGRATED MINIATURE CERAMIC 900 MHz CELLULAR MOBILE RADIO APPLICATIONS FILTERS FOR E. Kemppinen*, J. Hulkko**, S. Leppavuori*** ABSTRACT This paper discusses development work aimed at designing and manufacturing small integrated ceramic band-pass filters to be used in portable 900 MHz mobile radio telephone sets. Interdigital and comb-line types of filters investigated were