Arbitral control of reflection direction a reflectarray for the mobile communication system is key technology to amplify coverage area. Here, we examined correlation between tilt and rotational angles wave acquired by reflectarray. Simulation results showed that changing rotation angle up 75° reduces radar cross section (RCS) only few dBsm. Furthermore, maximum scanning ±60° was achieved approp...

A novel framework to enhance the angular resolution of automotive radars is proposed. An approach enlarge antenna aperture using artificial neural networks developed a self-supervised learning scheme. Data from high radar, i.e., radar with large aperture, used train deep network extrapolate element's response. Afterward, trained compact, low-cost radars. One million scenarios are simulated in M...

In this study, the problems encountered in radar cross-section (RCS) measurement experiments utilizing a dielectric barrier discharge (DBD) plasma system are examined and an effective solution is proposed. A DBD generates heat due to high bias voltage required for generation. The thermal-induced structural deformation of structure caused by its impact on RCS measurements analyzed. addition, tec...

The performance of different chipless RFID tag topologies are analysed in terms Radar Cross Section (RCS) and Bit Error Rate (BER). It is shown that the BER mainly determined by once a standard reading scenario considered fixed size chosen. arrangement resonators plays crucial role determining cross-polar RCS tag. computed theoretically using array theory where each resonator treated as separat...

In this work, a circular polarized (CP) maintaining metasurface is proposed, which can realize ultra-wideband CP-maintaining reflection and make its co-polarization coefficient under CP incidence close to 1.0 in the frequency band 6.2-26.4GHz; addition, by rotating unit cell structure, Pancharatnam-Berry (PB) phase be generated co-polarized incidence. Thus based on metasurface, 2-bit PB coding ...

Abstract Multilayer gradient absorbing materials are difficult to be modeled and simulated in practical applications. To solve this problem, a method of the inversion equivalent electromagnetic parameters multilayer based on annealing algorithm is proposed paper. The reflectivity material different forms polarization obliquely incident at angles calculated, then used calculate incidence angle s...

This paper presents a slot antenna array with reconfigurable radar cross section (RCS). The system is formed by combining liquid absorber 2*2 array. consists of polymethyl methacrylate (PMMA) container, 45% ethanol layer, and metal ground,which attached to the surface incident wave can be absorbed rather than reflected in other directions when PMMA container filled ethanol, which reduces monost...

Most conjunctions between Earth-orbiting satellites involve unknown objects, typically debris created by explosions or collisions. This study formulates methods to estimate probabilities of collision and fragmentation for such conjunctions, which depend on the estimated sizes masses objects. Analysis radar cross-section (RCS) measurements provides sizes, found be accurate at 90% confidence leve...

In the applications of synthetic aperture radar (SAR) data, a crucial problem is to develop precise models for the statistics of the pixel amplitudes or intensities. In this paper, a new statistical model, called simply here GΓΓ, is proposed based on the product model by assuming the radar cross section (RCS) components (texture components) of the return obey a recently empirical generalized Ga...

This article presents a radar cross-section (RCS)-based statistical recognition system for identifying/classifying unmanned aerial vehicles (UAVs) at microwave frequencies. First, the results of vertical (VV) and horizontal (HH) polarization RCS measurement six commercial UAVs 15 25 GHz in compact range anechoic chamber. The show that average depends on shape, size, material composition target ...