array signal processing; image resolution; radar imaging; radar resolution; synthetic aperture radar; transfer functions; electronic target; high-resolution imaging; near-field harmonic radar data; frequency-smoothed robust capon array processing scheme; classic imaging algorithms; synthetic aperture radar; transmit signal frequency; nonlinear transfer function; dispersive targets; robust capon based imaging; electronic device detection; injected electromagnetic wave; Radar imaging; Harmonic analysis; Imaging; Antenna measurements; Receiving antennas; Signal processing algorithms; harmonic radar; synthetic aperture radar; radar imaging; high-resolution imaging
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