Patent ID: 6535180
Filing Date: 2003-03-18
Classification: H01Q

Abstract:
An antenna receiving system, comprising:(a) an array of dual sense helical antenna elements for receiving right hand circular polarized radiation and left hand circular polarized radiation, each dual sense helical antenna element having a right hand circular polarized radiation signal output and having a left hand circular polarized radiation signal output; (b) a set of right hand circular polarized attenuators and a set of left hand circular polarized attenuators, a right hand circular polarized attenuator connected to the right hand circular polarized radiation signal output of each dual sense helical antenna element and a left hand circular polarized attenuator connected to the left hand circular polarized radiation signal output of each dual sense helical antenna element; (c) a set of right hand circular polarized phase shifters and a set of left hand circular polarized phase shifters, a right hand circular polarized phase shifter connected to a right hand circular polarized attenuator, and a left hand circular polarized phase shifter connected to a left hand circular polarized attenuator; (d) a direction finding computer having a first output connected to an attenuation setting input of each of the set of right hand circular polarized attenuators, the direction finding computer having a second output connected to an attenuation setting input of each of the set of left hand circular polarized attenuators, the direction finding computer having a third output connected to a phase setting input of each of the set of right hand circular polarized phase shifters, the direction finding computer having a fourth output connected to a phase setting input of each of the set of left hand circular polarized phase shifters, a signal output of the set of right hand circular polarized phase shifters connected to the direction finding computer and a signal output of each of the set of left hand circular polarized phase shifters connected to the direction finding computer; and (e) a beam forming computer having a first output connected to an attenuation setting input of each of the set of right hand circular polarized attenuators, the beam forming computer having a second output connected to an attenuation setting input of each of the set of left hand circular polarized attenuators, the beam forming computer having a third output connected to a phase setting input of each of the set of right hand circular polarized phase shifters, the beam forming computer having a fourth output connected to a phase setting input of each of the set of left hand circular polarized phase shifters, a signal output of the set of right hand circular polarized phase shifters connected to the beam forming computer and a signal output of each of the set of left hand circular polarized phase shifters connected to the beam forming computer.