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.