Analysis of Excited Coefficient and Blindness Spot in a Phased Array Antenna

keywords:phased array antenna, mutual coupling, excited coefficient, blindness spot, active pattern

Abstract:For analyzing the mutual coupling between the elements in a phased array deeply, a dipole array and a slot array are studied separately. The S-parameter of the element in an array antenna is applied to analyze the relationship between the elements. The active element patterns are simulated by using the coupling coefficient. The amplitude and the phases of the coupling coefficient are studied. It is found the phase of the coupling coefficient are different when the dipoles ( or slots) are arranged in parallel format and tandem format. It is the main reason that blindness spot appears.