Electromagnetic shielding effectiveness with multi-layered waveguide-below-cutoff array for improved air flow

Kim, Sangin; Kim, Yuna; Pang, Seungki; Yook, Jong‐Gwan

doi:10.1109/apmc.2017.8251432

Cited by 3 publications

(1 citation statement)

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“…where x and y are defined in the physical space, and k and represent the spatial frequency and physical incident angle, respectively. The resolution of the 2D ISAR image is determined from the frequency bandwidth B and total measured angle , as shown in Equations ( 8) and (9). In particular, k and B represent the distance and resolution of the horizontal axis about the 2D ISAR, and and represent the distance and resolution of the vertical axis about 2D ISAR.…”

Section: A Calibration Process For a Small Rcs Objectmentioning

confidence: 99%

Electromagnetic Signature of a Quadcopter Drone and Its Relationship With Coupling Mechanisms

et al. 2019

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This paper presents an investigation of the electromagnetic signature and the coupling mechanism of quadcopter drones with incident electromagnetic (EM) wave and radar cross section (RCS) analysis. Coupling analysis is performed based on the dominant coupling path: when an incident EM wave with a magnitude of 50 kV/m contacts a commercial quadcopter drone, its motor power wires are identified as the dominant coupling path. Higher coupling voltages are obtained for frequencies that have large impedance values at both ends of the load on the motor power wire. This induced voltage can affect the integrated circuit chip on a printed circuit board, as well as parallel plate resonances. Furthermore, the RCS of a quadcopter drone is measured in the frequency range of 0.5-3 GHz. The internal-component vulnerability characteristics of quadcopters can spike at specific frequencies with high RCS values and can be analyzed with or without motor power wires. We verified these hypotheses via 2D inverse synthetic aperture radar images, and we analyzed the results by comparing the empirical and full-wave simulation values.INDEX TERMS Coupling analysis, input impedance, inverse synthetic aperture radar, parallel plate resonance, quadcopter drone, radar cross section, vulnerable path, wire coupling.

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Section: A Calibration Process For a Small Rcs Objectmentioning

confidence: 99%