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This paper presents a low-cost UWB radar system for imaging concealed metallic targets. A rotating linear UWB antenna array is adopted to form a 2D aperture. LabVIEW is used to enable an automated control of the array. Two imaging algorithms, i.e. Delay-and-Sum (DAS) and Time Reversal (TR) are employed in simulation and experiment. It is shown that the DAS method is better at imaging in free space,...
Due to the additional degrees of freedom, multiple-element cross-eye jamming (MCJ) can reduce tolerance sensitivity and increase the effective sector angle. In this paper, we investigate multiple-element retrodirective cross-eye jamming (MRCJ) based on the retrodirective linear array. The monopulse error and cross-eye gain are derived via trigonometric approximations. Moreover, excellent performances...
In this paper, a novel DOA matrix method based on first order statistics is proposed, which can estimate two-dimensional (2-D) direction of arrival (DOA) for coherent signals at the cost of less computational complexity. Firstly, the pseudo autocovariance matrix and pseudo cross covariance matrix are constructed by the first order statistics of array received data, and the rank of the matrix is proved...
Due to the additional degrees of freedom, multiple-element cross-eye jamming (MCJ) can reduce the tolerance sensitivity and increase the effective sector angle. Considering MCJ ignores the retrodirective implementation, we investigate multiple-element retrodirective cross-eye jamming (MRCJ) against the amplitude-comparison monopulse radar in this paper. The monopulse ratio for MRCJ is derived under...
The transient response of the X-band microstrip antenna array illuminated by electromagnetic pulse(EMP) was calculated using FDTD and the proposed conductor edge of singularity solving technology which maintained the high accuracy without lower computation efficiency. The research results showed that the EMP can result in the enough high response voltage in coaxial line which may destroy components...
This paper addresses the beam pattern analysis in uncertain environment. Assuming that beamforming is achieved along one given receiver direction, the beam pattern is controlled via the sensor distribution to make different goals. Given two different applications, we show that the sensor nodes are located in a straight line perpendicular to the receiver direction, different distance between the sensors...
A dual-polarized phased array antenna for synthetic aperture radar (SAR) application is introduced in this paper. The RF topology configuration is illuminated briefly. An antenna module was tested and the measured results are presented, with which an applied array antenna should be extended with RF distribution networks, power supply and control subsystem used.
This paper presents the development of a microfabricated microbial fuel cell (MFC) array for screening microbes capable of direct electricity generation. The compact and user-friendly platform enables direct characterization and comparison of electrochemically active microbes in parallel. The MFC array consists of 24 independent miniature MFCs on a single 5??7.5 cm chip format, capable of 24 parallel...
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