simple in construction and suitable for wide band code division multiple access mobile communication systems a rectangular array antenna is formed by n u00d7 m antenna elements each antenna element has a frequency dependent gain which is the same for all elements each antenna element is connected to said single real valued multiplier with a single real valued coefficient which is determined by properly selecting a number of points on a u v plane defined for simplifying the design procedure according to the selected design algorithm application_number US 9334005 A description below preferred embodiments will be described with reference to the accompanying drawings fig1 shows a simplified structure of a wide band array antenna according to an embodiment of the present invention as illustrated the wide band array antenna of the present embodiment is constituted by n u00d7 m antenna elements e 1 1 e 1 m e n 1 e n m here it is supposed that each antenna element has a frequency dependant gain which is the same for all elements the direction of the arriving signal is determined by the azimuth angle u03b8 and the elevation angle u03b2 as in most practical cases it is assumed that the elevation angles of the incoming signals to the base station antenna array are almost constant here without loss of generality the elevation angle u03b2 is considered as u03b2 90 degrees the inter element spacing for the directions of n and m are.