Time-saving scanning schemes for measurement of electrically large antennas by spherical near-field technique

Different time-saving scanning schemes for measurement of electrically large antennas by spherical near-field technique are considered and analyzed. Significant time reduction is achieved through thinning of the scanning grid, which still allows obtaining accurate results for typical aperture-like antennas such as reflectors and antenna arrays. The considered scanning schemes were tested on experimental data from a large reflector antenna and a large slotted waveguide array.