In this contribution, we present an efficient approach for the design of multi-layer planar and cylindrical arrays with integrated Frequency Selective Surfaces (FSS’s). The design of such arrays responds to the more and more demanding requirements on modern array antennas in terms of structural integration and reduced Radar Cross Section (RCS). The proposed approach is based on an Integral Equa...

Two novel classes of spherical invisibility cloaks based on nonlinear transformation have been studied. The cloaking characteristics are presented by segmenting the nonlinear transformation based spherical cloak into concentric isotropic homogeneous coatings. Detailed investigations of the optimal discretization (e.g., thickness control of each layer, nonlinear factor, etc.) are presented for b...

In this paper, a novel algorithm for computing Physical Optics (PO) integrals is introduced. In this method, the integration problem is converted to an inverse problem by Levin’s integration algorithm. Furthermore, the singularities, that are possible to occur in the applications of Levin’s method, are handled by employing trapezoidal rule together with Levin’s method. Finally, the computationa...

Radar cross section (RCS) is a scattering measure of an object that scatters to the radar. However, existing methods for near-field (NF) measurement and data processing rarely extract amplitude characteristics, there lack effective verification far-field (FF) in process NF FF transformation, which leads inaccuracies prediction accuracy. In this paper, we propose method establish relationship be...

Most of the currently established techniques for breast cancer have inherent disadvantages, such as destructive effects, image accuracy, and others. In addition, mammography and nuclear methods have a potential for producing harmful ionization effects in humans. Another technique for breast cancer detection is microwave imaging radar, which has the advantage of a less hazardous modality and is ...

This paper presents a novel synthetic aperture radar (SAR) image simulation approach to target recognition, which consists of two frameworks, referred to as the satellite SAR images simulation and the target recognition and identification. The images simulation makes use of the sensor and target geo-location relative to the Earth, movement of SAR sensor, SAR system parameters, radiometric and g...

Long-time integration is an effective method for improving the signal–to–noise ratio (SNR) of echo. However, if target radar cross-section (RCS) fluctuates over long time, traditional coherent and noncoherent methods will produce significant performance losses, making it impossible to achieve a favorable at low SNRs. This study proposes new hybrid based on generalized Radon–Fourier transform (G...

Modern aircraft are capable of maneuvers exceeding those possible by purely aerodynamic design. This capability, called supermaneuverability, includes rapid changes in acceleration and high-G turns that are not feasible from traditional aircraft. Furthermore, newer aircraft often have a low radar cross-section (RCS) profile and/or RCS which varies rapidly with look angle. This paper summarizes ...

Metamaterial absorbers can provide good solutions for radar-cross-section (RCS) reduction. In spite of their attractive features of thinness, lightness, and low cost, resonant metamaterial absorbers have a drawback of narrow bandwidth. For practical radar applications, wideband absorbers are necessary. In this paper, we propose a wideband-switchable metamaterial absorber using liquid metal. In ...

Transponders (also known as polarimetric active radar calibrators or PARCs) are commonly used for radiometric calibration of synthetic aperture radars (SARs). Currently three methods for the determination of a transponder’s frequency-dependent radar cross section (RCS) are used in practice. These require either to measure disassembled transponder components, or a separate radiometric measuremen...