Electromagnetic Scattering
1) Equations of Maxwell in an object invested from a electromagnetic wave:
where Jeq(r') produces the field of scattering.
2) Function of scattering:
it represents amplitude, phase and polarization of the field diffused in the direction r0s from an object invested from a uniform flat wave that propaga in the direction r0i .
3) diffused Electric field of scattering to great distance:
4) Section trasversa of scattering bistatic:
5) Section trasversa of scattering monostatic:
6) Section trasversa of scattering:
it represents the power that totally comes diffused from the body considered for density of unitary power incident.
7) Section trasversa of absorption:
it represents the power amount that comes absorbed from a dissipative object in relation to the power incident.
8) Section trasversa of extinction:
it represents the property of the object to embezzle power to the wave incident.
9) Abedo:
it represents the relationship between the diffuse power and the power embezzled from the object.
10) Equation of the radar:
from which one looks at that being us the denominator 4ª the power of the distance, the received power is much lowland and therefore a high power with large antennas must be transmitted much and frequencies many elevating.