Satellite based passive radar system

In this thesis, satellite based passive radar's electromagnetic propagation is investigated. Electromagnetic wave which radiated from satellite will propagate through whole atmosphere and scattered by targets which will be modeled as civilian plane and stealth aircraft. Firstly, Modified Theory of Physical Optics (MTPO) is introduced. Diffraction deficiency of Physical Optics (PO) is eliminated by MTPO. Secondly, satellite antenna which is Perfectly Electric Conductor (PEC) Cylindrical Parabolic Reflector Antenna (CPRA) is introduced. CPRA's scattered fields are evaluated. In this thesis, reflected scattered field by CPRA is used as radiated electromagnetic wave. Another point of view of this thesis is Gaussian beam modelling. Radiated electromagnetic wave which is CPRA's reflected scattered field is modeled as Gaussian beam. Gaussian beam's incident Geometrical Optics (GO) wave is used as radiated field from satellite antenna which passes through atmosphere. Fourthly, atmosphere is modeled as using International Telecommunication Union Radiocommunication (ITU-R) Recommendations. Impairments of the atmosphere is investigated. Then, plane wave scattering by PEC surface line strip which is model of civilian plane is expressed. Also, plane wave scattering by perfectly absorbing surface which is model of stealth aircraft is investigated. Finally, numerical analysis is represented for attenuation by atmosphere, civilian plane with original dimension and stealth aircraft with original dimension and results are discussed.