Radar systems are disclosed that include a signal generator, an antenna, a
switching circuit, an I/Q sampling and signal-demodulation (demodulation)
processor, and a FFT processor. The signal generator produces
energization signals. The antenna has multiple individual antenna
elements. The switching circuit is configured to deliver the energization
signals to a selected antenna element at a respective moment in time to
cause the selected antenna element to transmit a respective radar signal
in response to the energization signal. At least one element receives a
corresponding return-radar signal before the switching circuit selects a
next antenna element to transmit a respective radar signal. The
demodulation processor receives the return-radar signals from the antenna
elements and demodulates the return-radar signals. The FFT processor
fast-Fourier transforms the return-radar signals. The system can include
a magnitude processor that determines, from the Fourier transforms,
respective magnitudes of the return signals in at least one data plane.
The system also can include an imager.