Radar cross section reduction of cylindrical cavities using ray-tracing method

Download

10466696.pdf

Date

2022-5-16

Author

Sezgin, Yusuf

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

294
views

389
downloads

Low observability technology, which aims to make it difficult to be detected, tracked, and hit by the enemy forces is one of the most critical technologies for 5th generation fighter aircraft. Low observability in Radio Frequency (RF) band is achieved by minimizing the Radar Cross Section (RCS) of the aircraft at specific angular zones and frequencies. RCS is a quantity related to the amount of reflection of the incoming electromagnetic wave by the aircraft and it is generated by different scattering mechanisms. Scatterings due to specular reflections and diffraction can be directly controlled by angular alignment, geometric shaping, and radar absorbing material (RAM) applications. However, multiple reflection scatterings in the cavities cannot be directly controlled due to their chaotic nature. In this study, a basic Shooting and Bouncing Rays (SBR) tool is developed to calculate the RCS and it is aimed to reduce the RCS of cylindrical cavities by optimizing the cavity geometry and RAM performance with the help of the statistical outputs of the ray-tracing method.

Subject Keywords

Ray-tracing, Shooting and Bouncing Rays (SBR), Radar Cross Section (RCS), Low Observability Technology, Cavity, Radar Absorbing Material (RAM)

URI

https://hdl.handle.net/11511/97378

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Jammer cancelation by using space-time adaptive processing Uysal, Halil; Severcan, Mete; Department of Electrical and Electronics Engineering (2011) Space-Time Adaptive Processing (STAP) has been widely used in spaceborne and airborne radar platforms in order to track ground moving targets. Jammer is an hostile electronic countermeasure that is being used to degrade radar detection and tracking performance. STAP adapts radar’s antenna radiating pattern in order to reduce jamming effectiveness. Jamming power that enters the system is decreased with respect to the adapted radiation pattern. In this thesis, a generic STAP radar model is developed and imple...
Multi-disciplinary design and optimization of air to surface missiles with respect to flight performance and radar cross section Karakoç, Ali; Aksel, Mehmet Haluk; Department of Mechanical Engineering (2011) This study focuses on the external configuration design of a tactical missile based on maximizing flight range while minimizing the radar signature which is a crucial performance parameter for survivability. It is known that shaping of a missile according to aerodynamic performance may have significant negative effects on the radar cross section. Thus, the impact of the geometry changes on the aerodynamic performance and the radar cross section is investigated. Suggorage models for the flight range, control...
Infrared low observable material design, synthesis and characterization Keskin, Ahmet; Ünalan, Hüsnü Emrah; Bek, Alpan; Department of Metallurgical and Materials Engineering (2023-1-27) In recent years, infrared low-observable technology has come to the fore in the aerospace and defense industry to conceal military aircraft against rapidly developing infrared search and tracking systems. Pigment materials developed for coatings applied to aircraft surfaces based on materials science and engineering in line with electromagnetic principles play a crucial role in this regard. Although low-observable structures were obtained in the 8-14 µm infrared wavelength range in particle studies, radar a...
Simulation-based comparison of some gmti techniques Baktır, Can; Koç, Seyit Sencer; Department of Electrical and Electronics Engineering (2009) With the developing radar technology, radars have been started to be used in the airborne platforms due to the need of fast, accurate and reliable information about the enemies. The most important and tactically needed information is the movements in an observation area. The detection of a ground moving target buried in a dense clutter environment from a moving air platform is a very challenging problem even today. The geometry of the operation, the course of the flight and structure of the clutter are the ...
Investigation of Simulated Ground Penetrating Radar Data for Buried Objects Using Quadratic Time-Frequency Transformations DOĞAN, MESUT; Sayan, Gönül (2017-07-14) Sub-surface sensing is a challenging area of research that highly benefits from the use of ultra-wideband ground penetrating radar (GPR) technology. Detection and classification of buried objects with reduced false alarm rates is still open to improvements. Use of joint temporal and spectral target features obtained from electromagnetic GPR signals using time-frequency representation (TFR) methods is highly promising because TFRs provide detailed information about the energy distribution of GPR signals over...

Citation Formats

Y. Sezgin, “Radar cross section reduction of cylindrical cavities using ray-tracing method,” M.S. - Master of Science, Middle East Technical University, 2022.