Extension of Plane-Wave Scattering-Matrix Theory of Antenna - Antenna Interactions to Three Antennas: A Near-Field Radar Cross Section Concept
BDM CORP ALBUQUERQUE NM
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This paper presents a three-antenna plane-wave scattering-matrix PWSM formulation and a formal solution. An example will be demonstrated in which two of the three antennas as electromagnetically identical the transmitter and receiver and the third the scatterer has arbitrary electromagnetic properties. Reduced reflection integral-matrix will be discussed which describes the transmit, scatter, receive TSR interaction. An antenna scatterer spectral tensor Greens function is identified. In this formulation the transmit spectrum will be scattered by the third arbitrary antenna target and this scattered spectrum may be considered to have originated from a transmitting antenna. Near-field antenna measurement techniques are applicable which determine the electric scattered field spectral density function. If a second deconvolution is applied, a transmit probe corrected spectral density function or scattering tensor can be determined in principle. In either case, a near- or far-electric field can be calculated and a radar cross section determined.
- Radiofrequency Wave Propagation