Multi-Frequency Compressed Sensing for Spherical Antenna Measurements

This paper iterates on the previous compressed sensing techniques for the characterization pattern of antennas by introducing a multi-frequency approach. It relies on a matrix formulation allowing to solve for the spherical wave expansion coefficients at all measured frequencies simultaneously. The proposed multi-frequency method is shown to be able to improve the resolution of the problem compared to single frequency processing through validation on simulation and measurement data. Moreover, the algorithm is tailored to integrate several key parameters being frequency dependent such as the truncation order of the spherical wave expansion.