An X-band element-level digital receive array

This paper describes the design and fabrication of an experimental 32-element receive digital array. The array is intended as a tool for researching digital array technologies and techniques. The paper describes the array architecture, the components chosen and the design of the RF and digital subsystems. Measured results are presented that show the effectiveness of our array calibration and error correction approach and demonstrate the scaling and improvement of the array-level signal-to-noise ratio over that of a single array element.