Results 41 to 50 of about 5,461,422 (271)
A Joint Frequency Space Design Approach for Efficient Planar Frequency Diverse Arrays
Scientific Reports, 2023 Abstract Antenna arrays benefit from spatial diversity, which enables the control of the pattern specifications in space. Adding frequency diversity to arrays provides an opportunity to control the beams in the Space-Time domain. Contrary to the conventional arrays, the added frequency diversity in the Frequency Diverse Arrays (FDA) leads to ...
Maryam Hasheminasab +2 more
openaire +3 more sources
Analysis of beampattern dwell time for planar frequency diverse array
IET Signal Processing, 2021 Frequency diverse array (FDA) has received much attention due to its both range–angle‐dependent beampattern. However, most of the existing works focus on the linear FDA, and time‐varying characteristics of its beampattern only give a rough qualitative ...
Hui Chen, Zi‐Hao Li, Wen‐Qin Wang
doaj +1 more source
Frequency Diverse Array Auto-Scanning Beam Characteristics and Potential Radar Applications
IEEE Access, 2022 Different from the phased-array with the same carrier frequency for all elements providing only angle-dependent beampattern, frequency diverse array (FDA) using a small frequency offset across its array elements offers new application capabilities due to
Wen-Qin Wang
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Statistical Analysis for Time Modulation-Based Frequency Diverse Array Beampattern
IEEE Access, 2019 Frequency diverse array (FDA) has received much attention due to its both range- and angle-dependent beampatterns. However, the range-angle coupling and time-variant beampattern in FDA may affect its applicability.
Hui Chen +3 more
doaj +1 more source
Frequency Diverse Coprime Arrays With Coprime Frequency Offsets for Multitarget Localization
IEEE Journal of Selected Topics in Signal Processing, 2017 Different from conventional phased-array radars, the frequency diverse array (FDA) radar offers a range-dependent beampattern capability that is attractive in various applications. The spatial and range resolutions of an FDA radar are fundamentally limited by the array geometry and the frequency offset.
Si Qin +3 more
openaire +1 more source
Frequency Diverse Array Super-Resolution Design With Element Locator Polynomial Rooting Approach
IEEE Access, 2023 Unlike traditional phased-array only generating angle-dependent beampattern, the relatively new frequency diverse array (FDA) produces an angle-range-dependent transmit beampattern that can provide many new applications.
Wen-Qin Wang
doaj +1 more source
An investigation of a frequency diverse array [PDF]
, 2009 This thesis presents a novel concept for focusing an antenna beam pattern as a function of range, time, and angle. In conventional phased arrays, beam steering is achieved by applying a linear phase progression across the aperture.
Antonik, P.
core
Frequency Increment Design Method of MR-FDA-MIMO Radar for Interference Suppression
Remote Sensing, 2023 In the present complex electromagnetic environment, radar target detection is threatened by different kinds of interferences, especially mainlobe deceptive interference, which occupies the same energy distributions of targets spatially, meaning that ...
Zhixia Wu +5 more
doaj +1 more source
Target Localization With Jammer Removal Using Frequency Diverse Array [PDF]
IEEE Transactions on Vehicular Technology, 2020 A foremost task in frequency diverse array multiple-input multiple-output (FDA-MIMO) radar is to efficiently obtain the target signal in the presence of interferences. In this paper, we employ a novel "low-rank + low-rank + sparse" decomposition model to extract the low-rank desired signal and suppress the jamming signals from both barrage and burst ...
Qi Liu 0005 +3 more
openaire +2 more sources
FEBS Letters, EarlyView.Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi +5 more
wiley +1 more source