On Predistortion Filtering for Switched Beamforming With Phased-Array Antennas
Jack Chuang, Camillo Gentile
In recent work, we proposed sweeping the antennas of phased arrays and beamforming in postprocessing – what we coined switched beamforming – instead of sweeping beams through analog beamforming – what the arrays are designed for. Not only is it orders of magnitude quicker to sweep, it also synthesizes beam patterns that are quasi-ideal. In the same work, we proposed predistortion filtering to compensate for the non-idealities of the hardware. Because a separate predistortion filter was designed for each of the swept antennas, leakage between the antennas was not accounted for. In this paper, we propose an improved design for a single filter that accounts for mutual leakage by considering all antennas in the design. Not only does it improve the peak-to-sidelobe suppression by a factor of 25 dB, it also experiences less degradation as the beam is steered from boresight.
March 26-31, 2023
IEEE European Conference on Antennas and Propagation
and Gentile, C.
On Predistortion Filtering for Switched Beamforming With Phased-Array Antennas, IEEE European Conference on Antennas and Propagation, Florence, IT, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=935716
(Accessed March 3, 2024)