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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01 Oct 1975
TL;DR: In this paper, a new element is described which is useful in array antennas, which has a circular symmetric radiation pattern, controllable beamwidth, and exhibits extremely low mutual coupling between elements in the array.
Abstract: A new element is described which is useful in array antennas. This element has a circular symmetric radiation pattern, controllable beamwidth, and exhibits extremely low mutual coupling between elements in the array. A modification of this antenna element results in a single antenna having equal E- and H-plane patterns, no side lobes and extremely low back radiation.
28 citations
22 May 2016
TL;DR: In this article, a two-dimensional (2D) frequency scanning antenna array that can exhibit a full-hemisphere coverage of radiation beams is proposed, which utilizes transmission-line based microwave metamaterials (MTMs) to realize both leaky wave antennas and antenna array feed networks.
Abstract: This paper presents a novel two-dimensional (2-D) frequency scanning antenna array that can exhibit a full-hemisphere coverage of radiation beams. The proposed 2-D frequency scanning antenna array utilizes transmission-line based microwave metamaterials (MTMs) to realize both leaky wave antennas and antenna array feed networks. By engineering the dispersion of both metamaterial leaky wave antennas and metamaterial feed networks, the proposed passive 2-D MTM antenna array is able to perform one-to-one frequency-space mapping and beamforming over the entire full-hemisphere without using any phase shifters or mixers.
28 citations
18 Jun 1979
28 citations
20 Jun 2004
TL;DR: In this paper, a comparison between the characteristics of small switched parasitic antenna arrays and varactor controlled parasitic antennas arrays is presented, and the systems requirements of some of the applications of smart antennas are discussed in light of the performance characteristics of these two antenna types.
Abstract: Two antenna arrays (variable reactance and switched parasitic antennas) form part of a larger number of antenna types targeted for use as smart antennas (or adaptive antennas). A comparison is presented between the characteristics of small switched parasitic antenna arrays and varactor controlled parasitic antenna arrays. The beam widths of the two antennas are similar, but the control system and support electronics are much simpler for the switched parasitic antennas. The systems requirements of some of the applications of smart antennas are discussed in the light of the performance characteristics of these two antenna types. In most applications of these smart antennas, precise angular control of the main beam is not a critical issue for most applications. If null positioning or if precise direction finding of multiple sources is a major requirement, only the varactor controlled parasitic antenna type offers this functionality.
28 citations
Dissertation•
01 Jan 2008
28 citations