Beam Squinting in Wideband 60 GHz On-Board Series-Fed Differential Patch Arrays

Abstract

This paper examines the beam squinting phenomenon in millimeter-wave wideband series-fed on-board arrays with respect to the number of elements and bandwidth as an inherent scanning capability. 4-element and 6-element wideband 60 GHz differential patch arrays are designed, fabricated and measured. Both arrays cover more than 6 GHz of impedance bandwidth. The 6-element array undergoes 22 degrees beam squinting over 8 GHz with 13 dBi average gain, while the 4-element array undergoes 15 degrees squinting over 6 GHz with 11 dBi average gain.