K. Ewan and F. Barrett, “Antenna Having Elements with Programmable Digitally Generated Time-Delays,” US Patent No. 5130717, 1992

has been cited by the following article:

• TITLE: Overlapped Subarray Architecture of an Wideband Phased Array Antenna with Interference Suppression Capability

  AUTHORS: Quazi Md. Alfred, Tapas Chakravarty, Salil Kumar Sanyal

  KEYWORDS: Phased Array; Subarray, Time-Delay; Overlapped Array

  JOURNAL NAME: Journal of Electromagnetic Analysis and Applications, Vol.5 No.5, May 20, 2013

  ABSTRACT: This paper presents a novel architecture of combining the linear array of antenna elements, where each antenna element has digitally selectable true time-delays as weights. Use of time-delays for beam-formation inherently makes the phased array network a wideband system. In particular, this technique envisage a new method of sharing antenna elements, by fixed overlapped sub-array architecture, which is able to maintain permissible element spacing to avoid grating lobe in antenna pattern. Moreover, this scheme additionally offers an easier null steering capability to the subarray architecture. This method essentially eliminates the need for intensive computation of complex weight vectors attached to each antenna element.