Antenna array calibration systems and methods

Pending Publication Date: 2018-03-01
ANALOG DEVICES INT UNLTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

The patent describes certain innovations and their advantages. The innovations can be implemented in a way that optimizes certain advantages without necessarily achieving all other advantages in the patent.

Problems solved by technology

The individual antenna elements of a phased-antenna array may radiate in a spherical pattern, but collectively generate a wavefront in a particular direction through constructive and destructive interference.
The radiation pattern destructively interferes in several other directions other than the direction of the main beam, and can reduce gain in those directions.

Method used

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  • Antenna array calibration systems and methods
  • Antenna array calibration systems and methods
  • Antenna array calibration systems and methods

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Embodiment Construction

[0043]The following detailed description of certain embodiments presents various descriptions of specific embodiments. However, the innovations described herein can be embodied in a multitude of different ways, for example, as defined and covered by the claims. In this description, reference is made to the drawings where like reference numerals can indicate identical or functionally similar elements. It will be understood that elements illustrated in the figures are not necessarily drawn to scale. Moreover, it will be understood that certain embodiments can include more elements than illustrated in a drawing and / or a subset of the elements illustrated in a drawing. Further, some embodiments can incorporate any suitable combination of features from two or more drawings.

[0044]An antenna array can enable a beamformer to steer an electromagnetic radiation pattern in a particular direction, which generates a main beam in that direction and side lobes in other directions. The main beam of...

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Abstract

Aspects of this disclosure relate to an array calibration system and method using probes disposed between antenna elements. In certain embodiments, the calibration is performed by measuring near-field relative phase and amplitude measurements of the antenna elements and using such relative measurements to adjust the amplitude and phase of the transceivers connected to the antenna elements. In some embodiments, each antenna element within a set of antenna elements transmits a signal that is received by a single probe, and the received signals are assessed to determine relative phase or amplitude measurements. In some embodiments, a single probe transmits a signal that is received by each antenna element within a set of antenna elements, and the received signals are assessed to determine relative phase and amplitude measurements.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims the priority benefit of U.S. patent application No. 62 / 380,328, filed Aug. 26, 2016, titled “SYSTEMS AND METHODS FOR ARRAY CALIBRATION,” the disclosure of which is hereby incorporated by reference herein in its entirety.FIELD OF THE DISCLOSURE[0002]The present disclosure relates to a structure for a phased antenna array, and a calibration method thereof. In particular, near-field measurements of signal characteristics are used to calibrate the antenna systems using a coupling structure disposed between the antenna elements.BACKGROUND[0003]An antenna with a single antenna element will typically broadcast a radiation pattern that radiates equally in all directions in a spherical wavefront. Phased antenna arrays generally refer to a collection of antenna elements that are used to focus electromagnetic energy in a particular direction creating a main beam. Phased antenna arrays are being used more frequently in a myriad...

Claims

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Application Information

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IPC IPC(8): H01Q3/26H04B17/12H04B5/00H01Q3/34H01Q21/22
CPCH01Q3/34H01Q3/267H01Q21/22H04B5/0043H04B17/12H01Q21/061H04B5/73
Inventor KHALIL, AHMED I.ABDELSALAM, MOHAMED A.
Owner ANALOG DEVICES INT UNLTD
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