| Title: |
Exploitation of Scattering of VHF Electromagnetic Waves from Jet Engine Exhaust Plasma Formations to Improve Detection Low RCS Aircrafts. |
| Authors: |
Chatziathanasiou, Thomas N.; Douklias, Athanasios; Uzunoglu, Nikolaos |
| Source: |
Progress in Electromagnetics Research C; 2025, Vol. 160, p169-174, 6p |
| Subject Terms: |
Electromagnetic waves; Radar cross sections; Waste gases; Plasma jets; Radar; Signal detection; Rayleigh scattering; Stealth aircraft |
| Abstract: |
The feasibility of utilization of VHF radars, radiating at lower and just above the plasma frequency of the gas formation exhausts of jet engine aircrafts, is investigated as a means to propose anti-stealth detection method. In the first step, the scattering of electromagnetic waves by a plasma sphere is studied, and comparison with Physical Optics (P.O.) Radar Cross Section (RCS) computations is done. This shows the possibility of using P.O. to compute RCS under the assumption of jet engine exhaust plume structured modelled as multilayer prolate spheroid. Also, in the case of radiation frequencies just above the plasma resonance, under the condition of weak scattering -- refractive index being close to unity -- Rayleigh-Gans approximation is used to compute the RCS. Furthermore, computations based on this model shows the possibility to enhance the RCS of aircrafts by combining the "specular" reflection of part of the exhaust with plasma resonance frequency being higher than the radar frequency and also the part of exhaust having plasma frequency just below the radar radiation frequency. The numerical results show promising mechanisms to compete to improve the detectability of aircrafts with RCS as low as 0,001 m2. [ABSTRACT FROM AUTHOR] |
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| Database: |
Complementary Index |