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ISAR near-field imaging using monostatic-bistatic equivalence and plane-wave expansion

Due to the linear formulation of their algorithms, many inverse synthetic aperture radar imaging systems are known to produce artifacts in case of monostatic setups with multiple interactions at the scatterer. Bistatic systems, where transmitting and receiving antennas are separated, may avoid this problem and are therefore of high interest. Considering relatively small bistatic angles, it is shown in this contribution how near-field samples from irregular measurement surfaces can be used for these setups by employing the monostatic-bistatic equivalence theorem. A numerical example is given.