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www.thalesgroup.com © THALES NEDERLAND B.V. AND/OR ITS SUPPLIERS. THIS INFORMATION CARRIER CONTAINS PROPRIETARY INFORMATION WHICH SHALL NOT BE USED, REPRODUCED OR DISCLOSED TO THIRD PARTIES WITHOUT PRIOR WRITTEN AUTHORIZATION BY THALES NEDERLAND B.V. AND/OR ITS SUPPLIERS, AS APPLICABLE. COMMERCIAL IN CONFIDENCE Saudi Symposium for RADAR Technology, December 10 th 2014 Nico de Bruijn Thales Netherlands B.V. AESA radars using Dual-axis Multibeam Scanning
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Page 1: AESA radars using Dual-axis Multibeam Scanningtangentlink.com/.../12/4.-AESA-radars-using-Dual-axis-Multibeam...AESA radars using Dual-axis Multibeam Scanning. 2 / e COMMERCIAL IN

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COMMERCIAL IN CONFIDENCE

Saudi Symposium for RADAR Technology,

December 10th 2014

Nico de Bruijn

Thales Netherlands B.V.

AESA radars using Dual-axis

Multibeam Scanning

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COMMERCIAL IN CONFIDENCE

Functionality

Operational

Use

Technical

innovation

AESA and

Digital beamforming per element

Dual Axis Multibeam

Forward-backward scanning

Active tracking

Multi-mission Sensor

Thales AESA Radars Overview

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Operational Use

Wider spectrum of targets - Challenges for radar design

Conflicting requirements to be solved in single radar mode

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Operational Use

From challenges to radar design (naval domain)

Slow targets Conventional targets

Doppler processing is used to separate targets from

clutter

Small &

SlowChallenge: to find small

targets in clutter

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Functionality

Scanning strategy

Interleaved waveforms optimised per velocity domain

LRS: long range, high velocity, high PRF

MRS: short/medium range, low velocity, low PRF (high PRT!)

Longer dwell time required!

Slow targets Conventional targets

burst

MRSLRS LRS MRS ……

𝑉𝑏𝑙𝑖𝑛𝑑 = ∙𝑃𝑅𝐹

2

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Functionality

Dual-axis multibeam

Single-axis multibeam

(e.g. SMART-S)

Dual-axis multibeam

(new generation)

Simultaneous receive beams in

elevation

Simultaneous receive beams in

azimuth & elevation

Ground-range

Transmitbeam

Elevation

Simultaneousreceive beams

Variety of

configurations

Dual-axis multibeam:

Increase of dwell time for same scan rate

Increase in azimuth accuracy (monopulse-like measurement)

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Functionality

Dual axis multi-beam

Benefits:

Solves conflicting requirements in one mode:

Long observation time for slow targets in clutter environment

High update rate for fast and high manoeuvring targets

High accuracy & improved resolution in azimuth/elevation

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Functionality

Specific techniques used as applicable

Forward / backward scanning

allowing Active tracking: Fast track initiation High track accuracy Track continuity outside the search

coverage areas

Forward/Backward scanning allowing

more scan speeds with same antenna

rotation rate: Long range => slow scan speed Medium range => high scan speed

Implementation depends on product requirements

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Technology

AESA with full controlled array – why?

Beam offset

DBF per element

Enables broad beam patterns for

Dual Axis Multibeam

Low sidelobes during off-

boresight scanning (e.g. for

active tracking)

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Thales AESA philosophy

How it all is connected…

AESA array with

full control over all

elements

“True AESA”

Wide coverage

beams

……

Interleaf different

waveforms

Detect a wider spectrum

of targets in clutter

Dual-axis

multibeam

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COMMERCIAL IN CONFIDENCE

First contract

1997 2007 2012 2013

APAR(X-band)

SM400(S-band)

SMART-L EWC(L-band)

NS100(S-band)

Thales long history in naval AESA radars

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Dutch OPV - SEA MASTER 400

SEA MASTER 400

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Operational Feedback Dutch OPV

Anti-drugs operation Caribbean

Anti-drugs: Zr Ms Holland caught ~10% of total maritime drug traffic of the

whole year in the Caribbean, according to US Coast Guard.

Spotted 6 small airplanes smuggling drugs (never seen before – performed

thanks to the SM400 radar)

Performed multiple SAR cases and Coast Guard tasks (law enforcement)

UAV operations

Zr Ms Holland worked with MALE UAV - Guardian (Predator B) system

operated by U.S. Coast Guard.

SM400 radar and Non-Rotating IFF performance was such, that U.S.

officers decided that Zr Ms Holland could operate as a stand-alone unit in

cooperation with Guardian UAVs.

First time that a non-U.S. ship was allowed to take on this role.

OPV joining “Joint Warrior” exercises near Scotland “spoiled” enemy

manoeuvres as sensors revealed all threats.

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NS100

NS100

In Development & Production

Surveillance

mode

Update

rate

Air

surveillance4 s

Active tracks ≤2 s

Surface gun

fire control2 s

High elevation search

Low elevation search

(Surface & Air)

+ 1 beam for SLB

Slow target search

(Surface & Air)

+ 1 beam for SLB

Display video/

FC surface surveillance

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SMART-L EWC

Expand into fast domain (BMD) (in production)

SMART-L EWCPoint

Defence

Early

warning

2000 km mode

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Conclusion

Dual axis multi-beam: Next generation surveillance radars

AESA is not a goal in itself but a means to an end

Generate razorsharp radar image

Expand velocity domain of targets

Different band radars in development & production