Topic
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.
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TL;DR: In this paper, a Van Atta self-steering array with enhanced retro-directive properties is presented, and the experimental performance of the array is demonstrated and a technique is described which compensates for the beam pointing error induced by antenna array element directivity.
Abstract: A new architecture for the Van Atta self-steering array is presented. Active antenna techniques are used to realise a compact self-steering array with enhanced retrodirective properties. The experimental performance of the array is demonstrated and a technique is described which compensates for the beam pointing error induced by antenna array element directivity.
21 citations
27 Oct 2003
TL;DR: A new concept for design of scanning antennas is suggested, based upon a combination of a single radiating element movement with antenna aperture synthesizing, based on various realizations of real and virtual movements of the radiator.
Abstract: A new concept for design of scanning antennas is suggested. The concept is based upon a combination of a single radiating element movement with antenna aperture synthesizing. The radiator movement may be either real or virtual one. In turn, the latter may be either mechanical or electronic one. In the paper, the case of electromechanical motion is preferably considered. Various realizations of real and virtual movements of the radiator are shortly described. Examples of the concept implementing are presented. Advantages and drawbacks of the concept are briefly discussed.
21 citations
TL;DR: In this article, the authors proposed a passive feed-forward coupling among elements to cancel out the mutual couplings in broadband multiple-antenna communication systems, where electrical current paths, with appropriate shape, location, and length, between adjacent elements are established to provide current distributions on adjacent elements that are approximately equal in magnitude and out of phase with the induced current on the same antenna due to the near-field coupling and scattering effects.
Abstract: An efficient method to mitigate the forward scattering (shadowing) effect and the near-field coupling among elements of broadband multiple-antenna communication systems is proposed. The technique is based on provision of a passive feedforward coupling among elements to cancel out the mutual couplings. Electrical current paths, with appropriate shape, location, and length, between adjacent elements are established to provide current distributions on adjacent elements that are approximately equal in magnitude and out of phase with the induced current on the same antenna due to the near-field coupling and scattering effects. As the coupling level decreases, the radiation pattern of an excited array element, in the presence of the other array elements, approaches the pattern of the antenna element in isolation. The technique is first detailed for a two-element wideband monoconical antenna array and is then extended to a uniform 12-element circular array of the same monoconical antennas where only feedforward paths are applied to circumferentially adjacent elements to reduce the coupling over a very wide bandwidth. The experimental results indicate that the application of the proposed feedforward technique to a 12-element circular array of monoconical antennas can provide a minimum of 2-dB reduction in the average gain deviation from omnidirectional radiation over an about 30% fractional bandwidth. Another important feature of the feedforward technique is removal of radiation nulls of the array elements at all frequencies and all directions.
21 citations
12 Dec 2005
TL;DR: In this article, a three dimensional, efficient, directive microstrip antenna array with low side lobe level (SLL) is described, where the NXN elements in the antenna are arranged in a planar configuration and are excited in space using a single feed microstrip patch.
Abstract: A three dimensional, efficient, directive microstrip antenna array having low side lobe level (SLL) is described. The NXN elements in the antenna are arranged in a planar configuration and are excited in space using a single feed microstrip patch. The array has lesser requirements on fabrication tolerances since the feed-lines network is completely avoided which results in good efficiency. The planar array structure can be packaged inside the application platform
21 citations
01 Oct 2013
TL;DR: In this article, the authors describe the results of a project which is aimed at making a step change in AESA build technology by moving to a ''tile'' technology to provide much lighter, cheaper arrays.
Abstract: This paper describes the results of a project which is aimed at making a step change in AESA build technology by moving to a `tile' technology to provide much lighter, cheaper arrays. The initial application is an affordable 2-D scanning array whose design goals were to achieve azimuth and elevation beamsteering with linear polarization over a 15%-20% bandwidth. The prototype antenna described here is an array of twenty elements in azimuth by eight in elevation. The features of the tiled array are described in the paper and measured radiation patterns are presented which agree well with modeled results.
21 citations