The passive ultra-high frequency (UHF) RFID is being increasingly employed in various applications. The low-cost, long range and high data rate features making it an outstanding choice in contactless identification. Although, passive tag performance is likely to be affected by water and metal, tag packages and special tag designs are developed to minimize the effect of the environment. Tag perf...

When point calibration targets are used to calibrate a SAR image, the calibration accuracy is governed by two major factors. The first factor stems from the stringent requirement on the radar cross section (RCS) of the point calibration target. To reduce the effect of radar return from the background, the RCS of a point calibration target must be much larger than that of the background. Calibra...

The traditional power allocation method for multi-target localization adopts the Robust Chance Constrained Power Allocation Scheme (RCC-PA), which does not consider strong clutter characteristics in current radar detection environment. However, how to reasonably allocate required locate target is a fundamental challenge improving combat capability of radar. Since Simultaneous Multi-beam Digital...

Up to date urban mapping and population data are required by policy makers, economists and planners in the developing world, and particularly for cities in South Asia, Latin America and Africa, to enable informed decision making. For many of these regions (particularly in the tropics) the all-weather capability of spaceborne imaging radar could prove to be a reliable and systematic monitoring t...

Passive radar is an emerging technology that offers a number of unique benefits, including covert operation. Many such systems are already capable of detecting and tracking aircraft. The goal of this work is to develop a robust algorithm for adding automated target recognition (ATR) capabilities to existing passive radar systems. In previous papers, 2 we proposed conducting ATR by comparing the...

Rapid identification of object from radar cross section (RCS) signals is important for many space and military applications. This identification is a problem in pattern recognition which either neural networks or support vector machines should prove to be high-speed. Bayesian networks would also provide value but require significant preprocessing of the signals. In this paper, we describe the u...

The absorptive and radiative losses are two fundamental aspects of the electromagnetic responses, which are widely occurring in many different systems such as waveguides, solar cells, and antennas. Here we proposed a metasurface to realize the control of the absorptive and radiative loss and to reduce the radar cross section (RCS) in multi-frequency bands. The anti-phase gradient and absorptive...

A new concept of the coding phase gradient metasurface (CPGM) is proposed, which is constructed using the phase gradient metasurface as the coding elements. Different from the previous coding metasurface (CM), both the coding sequences and gradient phases in the coding elements are designed to manipulate the electromagnetic (EM) wave for the CPGMs, and thus the manipulation will be more flexibl...

Perfectly Matched Layer (PML) is modeled by Split-Field FDTD (SF-FDTD) in order to simulate Radar Cross Section (RCS) of a plasma slab. PML is used as an absorbing boundary, and discrete plane wave (DPW) is employed to generate plane wave. DPW method has a power isolation of −300 dB between scattered-field and total-field regions. The dispersive media is modelled by shiftoperator FDTD. In this ...