Direction finding system device and method

摘要

The present invention relates to a method for determining the direction to a target by a direction finder, which comprises: predefining a direction axis as a 0° direction; first and second pair of antennas arranged such that a first line connecting between the first pair of antennae defines a 0°-180° axis parallel to said direction axis, and a second line connecting said second pair of antennas defines a 90°-270° axis perpendicular to said direction axis; generating a 0° antenna pattern and establishing a wireless communication between the direction finder and said target; attenuating the wireless communication signal until lost and recording the attenuation value; generating a 180° antenna pattern using said first pair of antennas, and establishing a wireless communication between the direction finder and said target; attenuating the wireless communication signal until lost, and recording the attenuation value and concluding a true direction to the target.

主权项

1. Method for determining the direction to a target by a direction finder, which comprises:
a. predefining a direction axis on a plane of the direction finder as a 0° direction; b. providing on said plane of the direction finder a first pair and a second pair of antennas, said first and second pairs of antennas are arranged in such a configuration that a first line connecting between the two antennas of the first pair defines a 0°-180° axis which is parallel to said direction axis of the direction finder, and a second line connecting between the two antennas of said second pair of antennas defines a 90°-270° axis which is perpendicular to said direction axis of the direction finder; c. generating a 0° antenna pattern A using said first pair of antennas, and establishing a wireless communication between the direction finder and said target; d. attenuating the wireless communication signal between the direction finder and said target until the wireless communication is lost, and recording the attenuation value RA which corresponds to said loss of wireless communication; e. generating a 180° antenna pattern B using said first pair of antennas, and establishing a wireless communication between the direction finder and said target; f. attenuating the wireless communication signal between the direction finder and said target until the wireless communication is lost, and recording the attenuation value NB which corresponds to said loss of wireless communication; g. determining from the relation between attenuations RA and NB and from the respective antenna patterns A and B one or more possible directions to the target; h. repeating steps (c)-(g) for antenna patterns C and D in 90° and 270° respectively while using said second pair of antennas, and determining from the respective antenna patterns C and D and from the relation between attenuations RC and ND one or more additional possible directions to the target; and i. correlating between all the directions as obtained in steps (g) and (h) and concluding a true direction φ to the target.