SIMPLIFIED DOPPLER ANTENNA SYSTEM

摘要

Disclosed is a simplified antenna system for radiating a frequency coded pattern using a beam-port antenna. The antenna system radiates a pattern wherein the frequency of the radiated wave energy varies over a selected portion of the region of space within which the antenna radiates and wherein the frequency of the radiated signal within the remaining portion or portions of the region is representative of the sense of angular displacement from the selected portion. The antenna system includes a multiple-beam antenna unit and means for supplying the ports of the antenna unit corresponding to antenna beams in the selected portion with wave energy signals having varying relative phase. The ports of the antenna unit corresponding to antenna beams in the remaining portion of the regions of space are supplied with wave energy signals having the same phase as the wave energy signals supplied to the port corresponding to the antenna beam within the selected portion which is adjacent to the remaining portion.