A quad antenna is a type of directional wire radio antenna used on different frequencies . Like a Yagi-Uda antenna ("Yagi"), a quad consists of a driven element and parasitic elements; however in a quad, each of these elements takes the form of a loop of wire, which may be square, round, or some other shape.  Below is a simplistic construction of such an antenna in the 2,442GHz band ,,and the simulation...