Cassegrain antennas have been utilized in applications where small size is critical. It has been observed that for antennas having subreflectors of the order of only several lambda in diameter, near-in sidelobe levels rise beyond normally predicted values. E-plane sidelobes are often several dB higher than those in the H-plane. Disturbances in the illumination of the primary reflector due to diffraction limitations of the electrically small subreflector are a possible cause of the sidelobe phenomenon. In this work, the results for 3 to 8 lambda-diameter hyperboloidal subreflectors, using the geometrical theory of diffraction (GTD) are presented and compared with the physical optics approach and other data. Degradation of the scatter pattern...
Este trabalho analisa o efeito das estruturas de suporte do sub-refletor das antenas Cassegrain atr...
IEEE, New York, NY, USAProceedings of Melecon '85: Mediterranean Electrochemical Conference. -- -- M...
In a dual reflector antenna, the spillover from the subreflector is important in determining the acc...
Cassegrain antennas have been utilized in applications where small size is critical. It has been obs...
Cassegrain antennas have been utilized in applications where small size is critical. It has been obs...
In this thesis we show how the ellipsoidal and hyperboloidal subreflectors, which are used in dual r...
Using a Cassegrainian geometry, the 64-meter antenna with its distorted paraboloidal reflecting surf...
Subreflector for Cassegrain antenna which permits prime-focus feeding of paraboloidal reflecto
Modifications to horn antennas through choke flanges and parabolic cylinder reflectors are investiga...
Diffraction by slits and scattering by antennas with slits in their reflectors are investigated. A...
This thesis examines certain aspects of diffraction and scattering of high frequency waves, utilisin...
Abstract—In this study, the impact of finite ground plane edge diffractions on the amplitude pattern...
Digital computer technique for computing scattered pattern of complex hyperboloid subreflector in Ca...
Reflectarrays that emulate paraboloidal main-reflectors, and hyperboloidal or ellipsoidal sub-reflec...
This thesis is a performance study of the paraboloidal antenna of the Dominion Radio Astrophysical O...
Este trabalho analisa o efeito das estruturas de suporte do sub-refletor das antenas Cassegrain atr...
IEEE, New York, NY, USAProceedings of Melecon '85: Mediterranean Electrochemical Conference. -- -- M...
In a dual reflector antenna, the spillover from the subreflector is important in determining the acc...
Cassegrain antennas have been utilized in applications where small size is critical. It has been obs...
Cassegrain antennas have been utilized in applications where small size is critical. It has been obs...
In this thesis we show how the ellipsoidal and hyperboloidal subreflectors, which are used in dual r...
Using a Cassegrainian geometry, the 64-meter antenna with its distorted paraboloidal reflecting surf...
Subreflector for Cassegrain antenna which permits prime-focus feeding of paraboloidal reflecto
Modifications to horn antennas through choke flanges and parabolic cylinder reflectors are investiga...
Diffraction by slits and scattering by antennas with slits in their reflectors are investigated. A...
This thesis examines certain aspects of diffraction and scattering of high frequency waves, utilisin...
Abstract—In this study, the impact of finite ground plane edge diffractions on the amplitude pattern...
Digital computer technique for computing scattered pattern of complex hyperboloid subreflector in Ca...
Reflectarrays that emulate paraboloidal main-reflectors, and hyperboloidal or ellipsoidal sub-reflec...
This thesis is a performance study of the paraboloidal antenna of the Dominion Radio Astrophysical O...
Este trabalho analisa o efeito das estruturas de suporte do sub-refletor das antenas Cassegrain atr...
IEEE, New York, NY, USAProceedings of Melecon '85: Mediterranean Electrochemical Conference. -- -- M...
In a dual reflector antenna, the spillover from the subreflector is important in determining the acc...