DT
D.P. Tran
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5 records found
1
In this paper, an imaging algorithm for the airborne radar system maneuvering along an arbitrary trajectory is proposed. The algorithm aims at wide-angle imaging with incomplete measurements from the nonlinear trajectory. The proposed composite joint sub-aperture imaging algorithm provides high reconstruction quality and supports efficient data collection policy. The image can be reconstructed by combining image patches corresponding to non-overlapping sub-apertures. The image patch is obtained by compressive sensing with joint sparse representation of the scene. Numerical results have proved that the proposed algorithm is highly effective and capable of image reconstruction without much loss in quality, especially on objects signature and contour.
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In this paper, an imaging algorithm for the airborne radar system maneuvering along an arbitrary trajectory is proposed. The algorithm aims at wide-angle imaging with incomplete measurements from the nonlinear trajectory. The proposed composite joint sub-aperture imaging algorithm provides high reconstruction quality and supports efficient data collection policy. The image can be reconstructed by combining image patches corresponding to non-overlapping sub-apertures. The image patch is obtained by compressive sensing with joint sparse representation of the scene. Numerical results have proved that the proposed algorithm is highly effective and capable of image reconstruction without much loss in quality, especially on objects signature and contour.
Conference paper
(2016)
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Dinh Tran, Mengyu Wang, Alexander Yarovoy
Novel antenna design for WLAN applications comply IEEE 802.11 a/b/g/n protocol is proposed. The design is based on a dielectric filled discone antenna. The antenna is characterized by omni-directional radiation patterns in the azimuthal plane and similar to each other radiation patterns at both WLAN operational bands at 2.4GHz and 5.5GHz in the elevation plane in the angular sector from 40° to 60°.
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Novel antenna design for WLAN applications comply IEEE 802.11 a/b/g/n protocol is proposed. The design is based on a dielectric filled discone antenna. The antenna is characterized by omni-directional radiation patterns in the azimuthal plane and similar to each other radiation patterns at both WLAN operational bands at 2.4GHz and 5.5GHz in the elevation plane in the angular sector from 40° to 60°.
The design and experimental verification of a novel dualband symmetric comb-slot loaded patch antenna for phased array applications is presented. The proposed antenna supports two well-defined sub-bands, with good bandwidths, and a frequency ratio of nearly 1.4:1. The antenna also exhibits consistent radiation patterns with low crosspolarization levels at both sub-bands. The single-layer architecture and compact electrical dimensions make it suitable for application in wide scanning phased arrays.
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The design and experimental verification of a novel dualband symmetric comb-slot loaded patch antenna for phased array applications is presented. The proposed antenna supports two well-defined sub-bands, with good bandwidths, and a frequency ratio of nearly 1.4:1. The antenna also exhibits consistent radiation patterns with low crosspolarization levels at both sub-bands. The single-layer architecture and compact electrical dimensions make it suitable for application in wide scanning phased arrays.
Journal article
(2014)
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SE Valavan, DP Tran, A Yarovoy, AG Roederer
Journal article
(2014)
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SE Valavan, DP Tran, A Yarovoy, AG Roederer
The design of a planar dual-band wide-scan phased array is presented. The array uses novel dual-band comb-slot-loaded patch elements supporting two separate bands with a frequency ratio of 1.4:1. The antenna maintains consistent radiation patterns and incorporates a feeding configuration providing good bandwidths in both bands. The design has been experimentally validated with an X-band planar 9 × 9 array. The array supports wide-angle scanning up to a maximum of 60 ° and 50 ° at the low and high frequency bands respectively.
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The design of a planar dual-band wide-scan phased array is presented. The array uses novel dual-band comb-slot-loaded patch elements supporting two separate bands with a frequency ratio of 1.4:1. The antenna maintains consistent radiation patterns and incorporates a feeding configuration providing good bandwidths in both bands. The design has been experimentally validated with an X-band planar 9 × 9 array. The array supports wide-angle scanning up to a maximum of 60 ° and 50 ° at the low and high frequency bands respectively.