| Abstract: | Technologies pertaining to the calibration of ultra-wide-band
active-electronically-scanned arrays to compensate for transmit and
receive mutual coupling between array elements and/or non-ideal isolated
channels are described herein. A plurality of near-field measurements are
taken by way of probe or probes that may be moved among a plurality of
positions aligned with respective elements in the array. For each
position of the probe, each of the elements of the array is stimulated to
transmit or receive a calibration signal to or from the probe,
respectively. Frequency-domain transfer functions are computed from the
received signals by the probe or the element for each of the array
elements in each of the positions of the probe. The inverse of the matrix
of transfer functions comprise frequency-domain transmit and receive
correction factors that are used to modify desired array inputs/outputs
such that the modified signals correct for mutual coupling between
elements in the array. |