HIGH STABILITY COPLANAR OSCILLATO,RS E.M. Bastida, P. Bergamini Abstract - The feasibility is demonstrated of various kinds of coplanar oscillator stabilized by a high Q dielectric cavity; their performances are comparable with the ones obtained with microstrip circuits. An X-band coplanar oscillator is d~scribed with a frequencyvs temperature stability lower than + .2 ppm/toverlOO°C temper

REFLECTOR AND LENS ANTENNAS FOR MILLIMETRE-WAVE RADIOMETERS R.J. Dewey ABSTRACT A reflector antenna trade-off study for a multi-beam airborne radiometer is described. Two different types of plano-convex lens antennas are compared. Beam broadening characteristics of the antennas are examined and a novel conical scan arrangement introduced. The compatibility of different scanning and tracking te

A 12M CASSEGRAIN ANTENNA WITH "OFF-SET" FEED SYSTEM FOR TWO FREQUENCY RANGES AND MONOPULSE TRACKING WITH BEARING ERROR CORRECTION A. Giefing; U. Leupelt ABSTRACT A 12m Cassegrain antenna for the space monitoring service is described, which is designed for an overall bandwidth of 1.5 to 13 GHz. With the present receive equipment it can be operated alternatively in three different frequency ban

SCAN PROPERTIES OF THE SCHWARZ SCHILD ANTENNA P.M.J. Scheeren, M.H.A.J. Herben and E.J. Maanders* ABSTRACT A theoretical investigation of the defocused Schwarzschild antenna system is described. Scan properties have been compared with those of the Cassegrain antenna system. It is shown that both the focused and defocused radiation patterns of the two systems are almost identical. 



NEWLY DEVELOPED CO-FEED TYPE SSR ANTENNA TANEAKI CHIBA and YASUO SUZUKI ABSTRACT The new type Secondary Surveillance Radar (SSR) antenna which Air Route Surveillance Radar (ARSR) reflector has been developed. has use The typical SSR uses a relatively small antenna on the top of the radar reflectors. The small vertical dimension of the antenna produces a very wide elevation beamwidth whic



DESIGN OPTIMIZATION ANTENNAS A. I. Zaghloul, PROCEDURES FOR MULTI-FEED SATELLITE SHAPED-BEAM R. R. persinger, D. F. DiFonzo* ABSTRACT This paper describes a systematic procedure for the design of offset parabolic satellite frequency reuse antennas with multiple feeds. Launch vehicle size constraints and the coverage requirements determine the optimum reflector geometry and feed parameters.

ITERATIVE CTORS. METHOD AND SAMPLING TECHNIQUES IN THE ANALYSIS OF SHAPED REFLE- G. D'Elia R. pierri (+) Abstract presented Fourier discussed both The application of the and egplored. Transform in this has been of sampling scattered This and sampling-like by a shaped is based tecni~ues to the is computation far field (FFT) with note. These reflector antenna new tecni~ue an iterativ

GENERATION OFFSET-FED OF HIGHLY CONTOURED SINGLE REFLECTOR BEAMS BY SHAPING THE SURFACE OF AN R. J~rgensen and P. Balling ABSTRACT The surface of an offset reflector illuminated by a single balanced feed is shaped so that the modified phase of the aperture field generates the desired contoured beam. The deviations from the paraboloidal surface are so small that the amplitude distribution i