1 / 13

Radar Physics EE880 Synthetic Aperture Radar

Radar Physics EE880 Synthetic Aperture Radar. M. A. Saville , PhD, PE Summer, 2012. Lesson Overview. Electromagnetic plane wave Space-time relationships Propagation constant Polarization Radar cross-section and coefficient Other effects Summary. Electromagnetic plane wave.

walter
Télécharger la présentation

Radar Physics EE880 Synthetic Aperture Radar

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Radar PhysicsEE880 Synthetic Aperture Radar M. A. Saville, PhD, PE Summer, 2012

  2. Lesson Overview • Electromagnetic plane wave • Space-time relationships • Propagation constant • Polarization • Radar cross-section and coefficient • Other effects • Summary

  3. Electromagnetic plane wave • Wave behavior described by the Maxwell equations 2D Cylindrical wave (water wave) wave solution 3D Spherical wave

  4. Electromagnetic plane wave Solution of a short dipole antenna In the far field, the radial component is much weaker Far field

  5. Polarization

  6. EM plane wave summary • EM plane waves are easy to model • Represents essential radar physics (wave propagation, time-shift, frequency/phase shift, amplitude scaling) • Polarization is also succinctly represented with plane wave model

  7. Radar Cross-Section [Lynch] Conventional aircraft RCS Stealth aircraft RCS

  8. Back-scatter coefficient and RCS Normalized cross-section coefficient Graphics from Stimson

  9. Back-scatter coefficient [Lynch]

  10. Doppler & Apparent Radial Velocity

  11. Atmospheric Loss [Lynch]

  12. Summary of SAR Image • EM plane waves • Radar cross-section • Atmospheric loss

  13. Lesson References • [Stimson] G. Stimson, Introduction to Airborne Radar, SciTech Publishing Inc., 1998. • [Sullivan] R. Sullivan, Foundations for Imaging and Advanced Concepts, SciTech Publishing Inc., 2004. • [Quegan] O. Quegan, Understanding SAR Imagery, SciTech Publishing Inc., 2004. • [Lynch] D. Lynch, Introduction to RF Stealth, SciTech Publishing, Inc., 2004.

More Related