The existing planar near-field antenna test range at Alcatel Space (ASP) in Toulouse has recently been enlarged and the frequency bandwidth increased to 18.5 GHz to allow for the testing of large fully integrated space flight antennas. This upgraded test range, including a specific reconfigurable ...
The synthesis is based on geometrical optics and near-field measurements of amplitude and phase from the feed element. The procedure preserves good symmetry in mapping from feed to aperture which results in minimal distortions of the electrical characteristics of the antenna. A 1.8 m antenna has ...
We summarise the mathematical foundation of the holographic method ofmeasuring the reflector profile of an antenna or radio telescope. Inparticular, we treat the case, where the signal source is located at a finitedistance from the antenna under test, necessitating the inclusion of theso-called Fre...
Antenna Measurement Setups: Introduction Antenna test rangeNear-fieldFar-fieldImpedanceAnechoic chamberFree spaceOn-wafer antenna measurementSpecial absorption rate (SARMeasurement is an important and ... ZN Chen,D Liu,H Nakano,... - Springer Singapore 被引量: 1发表: 2016年 加载更多来源...
Near field Cassegrain antenna - has collecting reflector with circular segment steps movable by flap device to produce 180 degree phase shiftThe antenna consists of a primary radiator (1) (eg a horn), an auxiliary reflector (2), a collecting reflector (3) and a main reflector (4). The ...
A near-field antenna measurement for a multiplexed Cassegrain reflector antenna was conducted to obtain the far-field magnitude and phase patterns around polar elevation angle θ and azimuthal angle , thus confirming that our antenna can produce three OAM modes simultaneously. We also measured the ...
Alignment of illuminator of a reflector antenna on the basis of the near-field configuration The possibility of positioning the feed in a reflector antenna by visually observing the phase distribution of the field on the plane situated in front of ... EI Vainberg,IA Zhosan,IA Kolosov,... -...
The authors develop a hybrid MM/UTD technique for treating arbitrarily shaped conducting plate antenna near a plane reflector. Numerical results of input admittances and far-field patterns are presented for antennas backed by a rectangular reflector. As examples, the authors consider a rectangular cond...
Define Parabolic reflectors. Parabolic reflectors synonyms, Parabolic reflectors pronunciation, Parabolic reflectors translation, English dictionary definition of Parabolic reflectors. Noun 1. parabolic reflector - a concave reflector used to produce a p
TECHNICAL FIELD OF THE INVENTION The present invention concerns, in general, a multi-beam reflector antenna for satellite applications. More specifically, the present invention relates to an innovative feed array for reflector antennas and to a reflector antenna exploiting said innovative feed array. BA...