Abstract
Very regular beamformer array geometries will have Grating Lobes in their directivity pattern when applied above a certain frequency. The grating lobes can be suppressed by removing periodicities, typically by the use of random arrays or spiral arrays. Large irregular arrays are, however, difficult to build due to their complicated support structure and cabling. The present paper describes a novel arrays, but which maintain the low grating lobe allows a much simpler support structure and cabling. The performance is compared with that of comparable irregular arrays, and verified through practical measurements.