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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.


Papers
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ReportDOI
01 Sep 2006
TL;DR: In this article, a wideband LFM chirp can be assembled from lesser-bandwidth LFM segments in the data processing, each with their own steering phase operation, which overcomes the problematic dilemma of steering wideband chirps with phase shifters alone without true time-delay elements.
Abstract: Wideband radar signals are problematic for phased array antennas. Wideband radar signals can be generated from series or groups of narrow-band signals centered at different frequencies. An equivalent wideband LFM chirp can be assembled from lesser-bandwidth chirp segments in the data processing. The chirp segments can be transmitted as separate narrow-band pulses, each with their own steering phase operation. This overcomes the problematic dilemma of steering wideband chirps with phase shifters alone, that is, without true time-delay elements.

18 citations

Proceedings ArticleDOI
T. Kawano1, H. Nakamo
11 Jul 1999
TL;DR: In this article, the radiation characteristics of two cross-mesh array antennas each composed of two grid array antennas were analyzed and the frequency responses of the gain and axial ratio were calculated.
Abstract: A grid array antenna acts as a radiation element of linear polarization. This paper presents the radiation characteristics of two cross-mesh array antennas each composed of two grid array antennas. It is found that the cross-mesh can radiate a dual linearly polarized (LP) wave and a dual circularly polarized (CP) wave. The frequency responses of the gain and axial ratio are calculated.

18 citations

Journal ArticleDOI
TL;DR: In this paper, the authors proposed a new approach to reduce mutual coupling effects in large phased array antennas currently under development for use in low frequency radio astronomy and demonstrated that wire inverted-V dipole antennas can be designed with significantly reduced receive coupling over a wide range of frequencies and wave directions by proper selection of antenna element geometry and feed impedance.
Abstract: This paper presents a new approach to reduce mutual coupling effects in large phased array antennas currently under development for use in low frequency radio astronomy. A receive mode definition of coupling between two antennas is shown to serve as a good indicator of the severity of mutual coupling interactions in a phased array. Thus, an efficient way to reduce mutual coupling in the array is to design antenna elements for low receive coupling. It is demonstrated that wire inverted-V dipole antennas can be designed with significantly reduced receive coupling over a wide range of frequencies and wave directions by proper selection of the antenna element geometry and feed impedance. Corresponding improvements in the performance of a large aperiodic phased array are achieved by using the reduced coupling wire inverted-V dipole design. Both antenna coupling and phased array analyses are performed using numerical simulation. Full-scale, in situ receive coupling measurements are performed to validate the simulation results.

18 citations

Proceedings ArticleDOI
01 Oct 2016
TL;DR: In this article, the design of an 8×8 phased array antenna tile for Ku-band mobile satellite communications is discussed, which has low profile, high gain, and wide-angle scanning properties.
Abstract: This paper discusses the design of an 8×8 phased array antenna tile for Ku-band mobile satellite communications. The array has low-profile, high-gain, and wide-angle scanning properties. The design steps and electromagnetic analysis of a dual-polarized radiating antenna element and an 8×8 array tile comprised of these radiating elements are presented. The array structure makes it possible for satellite communication (SATCOM) terminals with compact sizes, because the whole front-end might be on the same multilayer printed circuit board (PCB). With a compact geometry and 25% bandwidth, the array promises an excellent performance for satellite communication applications. The radiation characteristics and other array parameters are evaluated with respect to the application requirements.

18 citations

Patent
23 Jun 1989
TL;DR: In this paper, a dual polarised phased array antenna is formed by intersecting two parallel sets of circuit boards (11,12) respectively carrying orthogonally polarised antenna elements (17).
Abstract: A dual polarised phased array antenna is formed by intersecting two parallel sets of circuit boards (11,12) respectively carrying orthogonally polarised antenna elements (17). In prior antennas corresponding orthogonal elements mutually coincided with board intersections and interengagement slots restricted on-board circuit interconnection of elements. In the improvement the elements (17) are spaced from the board intersection slots (14) facilitating circuit interconnection along the board. Also the phase centres (16) of those antenna elements (17) relating to one polarisation direction are offset from the phase centres of corresponding antenna elements relating to the other polarisation direction. An array employing Vivaldi slot antenna elements is described

18 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20238
202222
20211
20209
20199
201816