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Phased Array

In antenna theory, a phased array usually means an electronically scanned array, a computer-controlled array of antennas which creates a beam of radio waves that can be electronically steered to point in different directions without moving the antennas.

In a simple array antenna, the radio frequency current from the transmitter is fed to multiple individual antenna elements with the proper phase relationship so that the radio waves from the separate elements combine (superpose) to form beams, to increase power radiated in desired directions and suppress radiation in undesired directions. In a phased array, the power from the transmitter is fed to the radiating elements through devices called phase shifters, controlled by a computer system, which can alter the phase or signal delay electronically, thus steering the beam of radio waves to a different direction. Since the size of an antenna array must extend many wavelengths to achieve the high gain needed for narrow beamwidth, phased arrays are mainly practical at the high frequency end of the radio spectrum, in the UHF and microwave bands, in which the operating wavelengths are conveniently small.

from Phased Array - Wikipedia

This topic includes the following resources and journeys:

 

 

An introduction to Beamforming

Mathworks - Brian Douglas
14 min
Beginner
Video
Theory

This video talks about how we actually have more control over the shape of the beam than just adding additional elements, or adjusting the position and orientation of the elements. We can...

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Multibeam Radar for Adaptive Search and Track

Mathworks - Brian Douglas
Intermediate
Example
Application

This MATLAB example shows how to use radarDataGenerator for a closed-loop simulation of a multifunction phased array radar (MPAR). The example starts by defining MPAR system parameters and...

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What are Phased Arrays?

Mathworks - Brian Douglas
17 min
Beginner
Video
Theory

This video introduces the concept of phased arrays. An array refers to multiple sensors, arranged in some configuration, that act together to produce a desired sensor pattern. With a phased...

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MATLAB Sensor Array Analyzer App

Mathworks
Intermediate
App
Application

The Sensor Array Analyzer app enables you to construct and analyze common sensor array configurations. These configurations range from 1-D to 3-D arrays of antennas, sonar transducers, and...

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How are Beamforming and Precoding Related?

Iain Explains Signals, Systems, and Digital Comms
12 min
Beginner
Video
Theory

Explains the relationship between Beamforming and Precoding in multi-antenna communication systems. Also discusses the relationship to Diversity.

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Why Digital Beamforming Is Useful for Radar

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13 min
Intermediate
Video
Theory

Learn how you can use digital beamformers to improve the performance and functions of radar systems. The MATLAB Tech Talk series on radar covered how to use radar to determine range, range...

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MATLAB Function: phased.MVDRBeamformer

Mathworks
Intermediate
Article / Blog
Application

The phased.MVDRBeamformer System object™ implements a narrowband minimum-variance distortionless-response (MVDR) beamformer. The MVDR beamformer is also called the Capon beamformer. An MVDR...

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MATLAB function: phased.LCMVBeamformer

Mathworks - Brian Douglas
Intermediate
Article / Blog
Application

The phased.LCMVBeamformer object implements a narrowband linear-constraint minimum-variance (LCMV) beamformer for a sensor array. The LCMV beamformer belongs to the family of constrained...

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Conventional and Adaptive Beamformers

Mathworks
Intermediate
Example
Application

This example illustrates how to apply digital beamforming to a narrowband signal received by an antenna array. Three beamforming algorithms are illustrated: the phase shift beamformer...

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Massive MIMO Hybrid Beamforming

Mathworks
Beginner
Example
Application

This MATLAB example shows how hybrid beamforming is employed at the transmit end of a massive MIMO communications system, using techniques for both multi-user and single-user systems. The...

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