The Experts below are selected from a list of 294 Experts worldwide ranked by ideXlab platform
Jian Yang - One of the best experts on this subject based on the ideXlab platform.
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wideband dual polarized Linear Array antenna for random los ota measurement
IEEE Transactions on Antennas and Propagation, 2018Co-Authors: Sadegh Mansouri Moghaddam, Andres Alayon Glazunov, Jian YangAbstract:In this paper, an $8\times 1$ dual-polarized Linear Array antenna is proposed for a random line-of-sight over-the-air measurement system. The proposed Array antenna operates over the frequency band of 1.6–2.7 GHz. A self-grounded bowtie is optimized as the Array element. A compact wideband two-port feeding network is designed and manufactured to differentially excite each element, while each port excites one of the two orthogonal polarizations. Corrugated plates have been employed in the transverse plane of the Linear Array in order to achieve the same beamwidth for both polarizations over the entire band. A prototype has been manufactured and the measured reflection coefficient is better than −10 dB. The realized gain and the half-power beamwidth of the Array in the transverse plane of the Array remain fairly constant over the entire band of interest.
Patrick Tabeling - One of the best experts on this subject based on the ideXlab platform.
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Frustration in a Linear Array of vortices.
Physical review letters, 1991Co-Authors: Hervé Willaime, Olivier Cardoso, Patrick TabelingAbstract:The experimental study of a Linear Array of vortices shows the existence of spatially modulated states of oscillation above onset. A model of coupled oscillators is proposed, and the measurements of the corresponding first- and second-neighbor couplings show that these regimes are the result of frustration
Sadegh Mansouri Moghaddam - One of the best experts on this subject based on the ideXlab platform.
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wideband dual polarized Linear Array antenna for random los ota measurement
IEEE Transactions on Antennas and Propagation, 2018Co-Authors: Sadegh Mansouri Moghaddam, Andres Alayon Glazunov, Jian YangAbstract:In this paper, an $8\times 1$ dual-polarized Linear Array antenna is proposed for a random line-of-sight over-the-air measurement system. The proposed Array antenna operates over the frequency band of 1.6–2.7 GHz. A self-grounded bowtie is optimized as the Array element. A compact wideband two-port feeding network is designed and manufactured to differentially excite each element, while each port excites one of the two orthogonal polarizations. Corrugated plates have been employed in the transverse plane of the Linear Array in order to achieve the same beamwidth for both polarizations over the entire band. A prototype has been manufactured and the measured reflection coefficient is better than −10 dB. The realized gain and the half-power beamwidth of the Array in the transverse plane of the Array remain fairly constant over the entire band of interest.
Mingjian Sun - One of the best experts on this subject based on the ideXlab platform.
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Synthetic aperture-based Linear-Array photoacoustic tomography considering the aperture orientation effect
Journal of Innovative Optical Health Sciences, 2018Co-Authors: Xiangwei Lin, Naizhang Feng, Mingjian SunAbstract:The synthetic aperture-based Linear-Array photoacoustic tomography (PAT) was proposed to address the limited-view shortcomings of the single aperture, but the detection field of view (FOV) determined by the aperture orientation effect was not fully considered yet, leading to the limited-view observation and image resolution degradation. Herein, the aperture orientation effect was proposed from the theoretical model and then it was verified via both the numerical simulation and phantom experiment. Different orientations were enumerated sequentially in the simulation to approximate the ideal full-view case for the optimal detection FOV, considering the detection pattern of the Linear-Array transducer. As a result, the corresponding optimal aperture orientation was 60[Formula: see text] if the synthetic aperture was seamlessly established by three single Linear Arrays, where the overlapped detection pattern was optimized from the individual Linear-Array transducer at the adjacent positions. Therefore, the limited-view artifacts were minimized and the image resolution was enhanced in this aperture orientation. This study showed that the aperture orientation had great influence on the optimal detection FOV in the synthetic aperture configuration, where the full-view imaging quality and enhanced image resolution could be achieved.
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synthetic aperture based Linear Array photoacoustic tomography considering the aperture orientation effect
Journal of Innovative Optical Health Sciences, 2018Co-Authors: Xiangwei Lin, Naizhang Feng, Mingjian SunAbstract:The synthetic aperture-based Linear-Array photoacoustic tomography (PAT) was proposed to address the limited-view shortcomings of the single aperture, but the detection field of view (FOV) determin...
Andres Alayon Glazunov - One of the best experts on this subject based on the ideXlab platform.
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wideband dual polarized Linear Array antenna for random los ota measurement
IEEE Transactions on Antennas and Propagation, 2018Co-Authors: Sadegh Mansouri Moghaddam, Andres Alayon Glazunov, Jian YangAbstract:In this paper, an $8\times 1$ dual-polarized Linear Array antenna is proposed for a random line-of-sight over-the-air measurement system. The proposed Array antenna operates over the frequency band of 1.6–2.7 GHz. A self-grounded bowtie is optimized as the Array element. A compact wideband two-port feeding network is designed and manufactured to differentially excite each element, while each port excites one of the two orthogonal polarizations. Corrugated plates have been employed in the transverse plane of the Linear Array in order to achieve the same beamwidth for both polarizations over the entire band. A prototype has been manufactured and the measured reflection coefficient is better than −10 dB. The realized gain and the half-power beamwidth of the Array in the transverse plane of the Array remain fairly constant over the entire band of interest.
