Linear dual-band phased arrays with wide-angle scanning capability

The design and development of linear dual-band patch arrays with wide-angle scanning feature and large frequency ratio is presented. The novel dual-band patch antenna used in the linear arrays supports two well-defined bands with a frequency ratio of 1.43:1, in the X-band, and maintains consistent radiation patterns at both the sub-bands. The antenna also has a compact electrical dimensions measuring only 0.38λ_L × 0.38λ_L, at the low frequency band of operation. Prototypes linear arrays have been built and their performance experimentally validated.