Abstract :
The field scattered by an antenna contains a component that is the short circuit scattered field normalized by the short circuit current and a second component that is the radiation field normalized by the transmitting current and multiplied by a factor (1-Γ). The RCS is the magnitude squared of the difference between two terms, one being the square root of a complex `structural´ cross section, and the other (1-Γ) times the square root of a complex `antenna´ cross section. These relationships, and the role of the load impedance are clarified. The connection between antenna directivity and load effective receiving area is also derived
Keywords :
S-matrix theory; antenna theory; electric impedance; electromagnetic field theory; electromagnetic wave scattering; radar antennas; radar cross-sections; RCS; antenna directivity; antennas; load effective receiving area; load impedance; radar cross-section; radiation field; radiators; scatterers; scattering matrix; short circuit current; short circuit scattered field; transmitting current; Circuits; Difference equations; Impedance; Loaded antennas; Receiving antennas; Reflection; Reflector antennas; Scattering; Transmission line matrix methods; Transmitting antennas;
