Field and Wave Electromagnetics 2nd Edition by David Cheng

تمرين 27

For a uniform linear array with a large number of elements the denominator sin ( /2) in Eq. (11-89) remains small over a large portion of the normalized array pattern near the main beam and can be approximated by ( /2). Use this approximation to deter­mine the directivity of the array of a large uniform array with many elements.