Generalization of susceptibility of RF systems through far-field pattern superposition

B. Verdin; P. Debroux

doi:10.1117/12.2177074

21 May 2015 Generalization of susceptibility of RF systems through far-field pattern superposition

B. Verdin, P. Debroux

Proceedings Volume 9461, Radar Sensor Technology XIX; and Active and Passive Signatures VI; 94610Q (2015) https://doi.org/10.1117/12.2177074
Event: SPIE Defense + Security, 2015, Baltimore, MD, United States

Abstract

The purpose of this paper is to perform an analysis of RF (Radio Frequency) communication systems in a large electromagnetic environment to identify its susceptibility to jamming systems. We propose a new method that incorporates the use of reciprocity and superposition of the far-field radiation pattern of the RF system and the far-field radiation pattern of the jammer system. By using this method we can find the susceptibility pattern of RF systems with respect to the elevation and azimuth angles. A scenario was modeled with HFSS (High Frequency Structural Simulator) where the radiation pattern of the jammer was simulated as a cylindrical horn antenna. The RF jamming entry point used was a half-wave dipole inside a cavity with apertures that approximates a land-mobile vehicle, the dipole approximates a leaky coax cable. Because of the limitation of the simulation method, electrically large electromagnetic environments cannot be quickly simulated using HFSS’s finite element method (FEM). Therefore, the combination of the transmit antenna radiation pattern (horn) superimposed onto the receive antenna pattern (dipole) was performed in MATLAB. A 2D or 3D susceptibility pattern is obtained with respect to the azimuth and elevation angles. In addition, by incorporating the jamming equation into this algorithm, the received jamming power as a function of distance at the RF receiver Pr(Φr, θr) can be calculated. The received power depends on antenna properties, propagation factor and system losses. Test cases include: a cavity with four apertures, a cavity above an infinite ground plane, and a land-mobile vehicle approximation. By using the proposed algorithm a susceptibility analysis of RF systems in electromagnetic environments can be performed.

Citation Download Citation

B. Verdin and P. Debroux "Generalization of susceptibility of RF systems through far-field pattern superposition", Proc. SPIE 9461, Radar Sensor Technology XIX; and Active and Passive Signatures VI, 94610Q (21 May 2015); https://doi.org/10.1117/12.2177074

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KEYWORDS

Antennas

Superposition

Electromagnetism

Algorithm development

Finite element methods

Receivers

Telecommunications

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