Reflective array antenna

About: Reflective array antenna is a research topic. Over the lifetime, 4366 publications have been published within this topic receiving 57884 citations.

Phased antenna array for wind profiling applications

Abstract: A diagonal phased antenna array for use as a wind profiler by means of Doer shift measurements comprises a plurality of Yagi-Uda antennas which are oriented in a predetermined direction such that Yagi-Uda antennas have a polarization 45° offset from the principal planes of operation of the antenna array resulting in similar radiation patterns subject to a geometric taper in the array aperture with respect to the principal planes.

Research and development of planar UWB antennas

Abstract: This paper addresses the advanced progress in research and development of planar antennas for promising ultra-wideband (UWB) applications within 31 GHz-106 GHz The special design considerations for UWB antennas are introduced first Secondly, newly developed omnidirectional designs, especially the antennas on PCBs are reviewed Thirdly, the characteristics of a directional modified antipodal tapered slot antenna are shown for UWB applications

Density tapered transmit phased array

Abstract: A phased antenna array ( 60 ) for use on a satellite, that employs a density tapering technique for positioning the antenna elements ( 62 ) in the array ( 60 ) to reduce co-channel interference between adjacent cells. Particularly, the spatial position of the various antenna elements ( 62 ) in the array ( 60 ) are spread out so that the center portion of the array ( 60 ) has the highest density of elements ( 62 ), and the outer portion of the array ( 60 ) has the lowest density of elements ( 62 ). Predetermined schemes are used to set the density of the elements ( 62 ) in the array ( 60 ). By providing fewer antenna elements ( 62 ) at the outer portion of the array ( 60 ), the beam side lobes are reduced.

Dual polarization receiving antenna array for recording of ultra-wideband pulses

Abstract: The results of investigation of a 4 × 4 ultra-wideband dual polarization receiving antenna array designed for investiagtion of the polarization structure of nanosecond and subnanosecond electromagnetic pulses are presented. The elements of this antenna array are the crossed dipoles whose arms are loaded with single-stage FET amplifiers. The results of measurements of the patterns, the effective length, and the wave-forms of the recorded pulses are presented for different values of the array interelement spacing and the directions of arrival of radiation.

Imaging radar sensor with narrow antenna lobe and wide angle-detection range

Abstract: The invention relates to a device for detecting objects within a swivel range, comprising at least two switchable transmitting antennas (10), a plurality of receiving antennas (20), the transmitting antennas (10) and the receiving antennas (20) extending in parallel along a first direction (y), and the receiving antennas (10) being arranged in a row and said row extending in a second direction (x). The receiving antennas (20) and the transmitting antennas (10) are arranged such that, owing to the sequential control of the transmitting antennas and of the positions of the transmitting and receiving antennas, they define a synthetic receiving antenna array for beam sweeping. The resulting distance between the positions of the receiving antennas in the synthetic receiving antenna array in the second direction is d, the neighboring receiving antennas in the apparatus having a distance of d2 or more and d2 being twice the value of distance d.