PHASED ARRAY ANTENNA SYSTEM AND PHASE CALCULATION METHOD IN THE PHASED ARRAY ANTENNA SYSTEM

摘要

PURPOSE: To realize a mono-pulse phased array antenna system in which a minimum change in a desired beam scanning angle is realized. ;CONSTITUTION: The above antenna system is a mono-pulse phased array antenna system in which a plane array antenna comprising K-sets of antenna elements 1, a phase shifter 2 connected to each antenna element and a phase calculation means 4 calculating phase shift of the phase shifter 2 are provided. The z axis is provided to the array, the x axis is provided in the array face, the beam scanning plane is set to be the zx plane and when a beam is scanned in a direction by an angle θ from the z axis, the phase shifter in M bits is provided to satisfy the condition of equation I to realize a minimum change Δθ of the beam scanning angle, where E₁ is the amplitude of a signal on each antenna element, x₁ is an x-coordinate of each antenna element and 6) is a coefficient taking a value of ±1 in response to the position of the antenna element in the forming of a difference pattern.;COPYRIGHT: (C)1993,JPO&Japio