The progress in wireless technology over the past decade led to rapid adoption of unmanned aerial vehicles (UAVs) for various applications. As interest UAVs is accelerating, increased attention paid reliability and resilience UAV-based systems with respect collision avoidance. One ways improve this aspect utilize RADAR functionality. In work, we consider a cellular network employed communicatio...

The hypersonic flight regime is conventionally defined for Mach > 5; in these conditions, the flying object becomes enveloped a plasma. This plasma densest thin surface layers, but, typical situations of interest, it impacts electromagnetic wave propagation an electrically large volume. We address this problem with hybrid approach. employ equivalence theorem to separate inhomogeneous region fro...

Because Pancharatnam-Berry (PB) geometrical phase can only be generated in the co-polarized reflection coefficient under circular polarized (CP) incidence for a reflective metasurface, design of PB coding metasurface must based on an appropriate polarization conversion (PCM) which achieve CP-maintaining reflection. In this work, to 2-dit radar cross section (RCS) reduction, ultra-wideband PCM i...

This letter presents trimmed aperture corner reflectors (CRs) for assigning angle selectivity to chipless radio frequency identification (RFID) tags. can benefit the landmark use of CR-based tags by exhibiting different signals in each direction, which enables infrastructure-to-device communication with rich context. The key idea this work is subtract retroreflections unwanted directions partia...

The outboard corner reflectors are widely used as a countermeasure to radar tracking and detection. Therefore, it is essential determine the composite time-domain scattering characteristics of reflector ship against sea background jamming effectiveness array. In this paper, electromagnetic target, reflector, surface studied based on bouncing ray method (TDSBR). echo broadband cross section (RCS...

A metallic cylinder is one of the best materials and shapes to calibratingradar system performance. In addition toits reflective properties, cylindersallow foraccurate modeling for prediction radar cross-section (RCS). This study presents themeasurement a with diameter 4cm height 3cm as target,analyzedinthe millimeter-wave (mm-wave) spectrum. Theexperiment was conducted in thereal airport envir...

This paper presents a 4 × slot array antenna with ultra-wideband low-scattering characteristic, which integrates metasurface based on the multielement phase cancellation (MEPC) method. Limited by characteristics of array, contradiction between ideal radiation performance and requirement low radar cross section (RCS) has not been well resolved. Therefore, in this paper, MEPC-based is designed as...

This paper presents measurements of Radar Cross Section (RCS) five Unmanned Aerial Vehicles (UAVs), comprising both consumer grade and professional small drones, collected in a semi-controlled environment as function azimuth aspect angle, polarization frequency the range 8.2-18 GHz. The experimental setup data pre-processing, which include coherent background subtraction gating procedures, are ...

A radar NDE (nondestructive evaluation) technique using an airborne antenna operating in the far-field condition is developed for detecting damages such as delamination and concrete cracking in GFRP (glass fiber reinforced polymer)-wrapped concrete columns. The far-field airborne radar (FAR) NDE technique is advantageous for distant measurement of bridge columns in practical applications. Far-f...

Conventional civil Air Traffic Control (ATC) systems are able to detect targets and identify collaborative aircrafts in the air space but they don’t ensure full coverage at low altitudes, in presence of non-cooperative targets (NCTs) and aircraft (A/C) with a low value of radar cross section (RCS). This paper describes the ARGUS 3D (AiR GUidance and Surveillance 3D) project funded by the Europe...