Quantization Lobe Suppression in Binary Antenna Arrays with Large Partitioning Order

We investigate the efficiency of quantization lobe suppression in binary reconfigurable intelligent surfaces (RIS) consisting of several tiles (panels). The cases of partitioning the RIS into 4, 16 or 64 tiles (partition orders 1, 2 and 3 respectively) and shifting half of them along the direction perpendicular to the array aperture by 1/8 of the wavelength are investigated. The difference in the suppression of the quantization lobe was shown to make 17 percent (1.6 dB) or less between the first and the third partition orders for scan angles of up to 45 degrees.