System and method for estimating the direction of arrival of an electromagnetic beam

Patent metadata

Field	Value
Publication number	US-10401467-B2
Application number	US-201514835097-A
Country	US
Kind code	B2
Filing date	Aug 25, 2015
Priority date	Aug 25, 2015
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

A device for estimating a two-dimensional direction of arrival (DOA) of an electromagnetic beam includes an antenna system, and a signal processor operatively coupled to the antenna elements of the antenna system. The antenna system includes a plurality of antenna elements arranged in a rectangular planar array and configured to receive signal components of the electromagnetic beam. The signal processor estimates the two-dimensional DOA of the electromagnetic beam based on relative phases of the signal components of the electromagnetic beam.

First claim

What is claimed is:

1. A device for estimating a two-dimensional direction of arrival (DOA) of an electromagnetic beam, the device comprising:
an antenna system including four antenna elements forming a rectangular planar array and configured to receive four signal components of the electromagnetic beam;
an interferometer including a multiport passive junction, the multiport passive junction including a network of a plurality of hybrid couplers and a plurality of phase shifters and configured to couple and add phase shifts to the four signal components in accordance with a scattering matrix to produce four output signals; and
a signal processor coupled to the interferometer and configured to estimate the two-dimensional DOA of the electromagnetic beam based on the four output signals.

2. The device of claim 1 , wherein the scattering matrix-specifies a phase relationship between four input signals and the four output signals.

3. The device of claim 2 , wherein the multiport passive junction further comprises input ports 1 , 2 , 7 , and 8 and output ports 3 , 4 , 5 , and 6 , and wherein the phase relationship between the four input and the four output signals is determined according to:

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Assignees

• Huawei Tech Canada Co Ltd

Inventors

• Moghaddasi Jaber
• Wu Ke

Classifications

• H01Q3/30

  varying the {relative} phase {between the radiating elements of an array (H01Q3/2605, H01Q3/2658, H01Q3/2682, H01Q3/44 take precedence)} · CPC title

• G01S3/043 Primary

  Receivers · CPC title

• G01S3/48 Primary

  the waves arriving at the antennas being continuous or intermittent and the phase difference of signals derived therefrom being measured · CPC title