Kelvin Hughes

Situational Intelligence, The World Over

Naval Radar

Naval Radar

In providing the world's navies and coastguards with surface search, navigation and helicopter control radars Kelvin Hughes has pioneered the use of coherent pulse Doppler technologies for these roles. As a result, Kelvin Hughes SharpEye™ naval radars are able to see small targets in sea, rain or land clutter that others will miss. See what you are missing...

Providing early warning of the presence of larger vessels, small targets and asymmetric threats such as submarine periscopes, RHIBs, small wooden boats, USVs and Jetskis, enhances force protection across a range of platforms from fighting ships and submarines through to patrol vessels, auxiliaries and coastguard vessels.

With a long history in the supply of naval radar, Kelvin Hughes has always been at the forefront of technological innovation and currently supplies over 30 of the world's navies. Legacy Kelvin Hughes systems such as the UK Royal Navy's standard 1007 and 2007 radars are still in service after decades of intensive use. However, navy's are now demanding a host of capabilities from its new navigation radars, including helicopter and UAV control as well as enhanced situational awareness. SharpEye™ solid state radar meets all of today's naval radar requirements.

Launched in 2008, more than 25 navies now use SharpEye™ radars and displays, which deliver improvements in sub-clutter visibility by approximately 30dB, enabling targets with a low RCS (Radar Cross Section), typically 0.5m2, to be detected even in heavy rain and high sea states. Doppler processing enables clutter removal without picture degradation. This combined with a host of other unique and special features in the radar sensor and display provides an unprecedented level of situational awareness to naval and coastguard vessels from a navigation radar.

  • Detection in clutter
  • Performance advantage
  • No magnetron - minimal routine maintenance requirements
  • High MTBF (Mean Time Between Failure)
  • Extremely low through life costs
  • Covert
  • Type Approved
  • Military Aviation Authority approved (Helicopter Control)
  • Mil-Spec design
  • Multipurpose radar sensor
  • Multifunction tactical radar display

For more information on Naval Radar

SharpEye™ Solid State Pulse Doppler Radar

SharpEye™ I-Band and E/F-band (X & S-band) radar technology meets the detection challenges of navies, coastguards and border agencies through a clever combination of radar techniques designed to provide the best performance in all conditions, whilst also providing the flexibility to be optimised for specific detection needs.

Solid state radar ensures extremely high reliability and low through life cost:

  • No magnetron - minimal routine maintenance requirements
  • No fault-finding training required
  • Line replaceable unit - does not require radar trained technician to replace
  • Low Mean Time To Repair (MTTR)
  • Upmast transceiver solution - no waveguide to compromise citadel integrity - easy to retrofit - reduced signal loss.
SharpEye Naval Radar

SharpEye™ transmits a low power patented pulse sequence, which enables short, medium and long range radar returns to be detected simultaneously, allowing the radar operator to maintain situational awareness regardless of the range scale setting of the radar display. Other users of the radar can select their own radar display range scale. A low peak transmission power (less than 300W) equivalent to a 25kW magnetron reduces the probability of intercept by ESM systems.

Doppler processing of radar returns provides coherent information concerning a target's velocity (radial) and enable the detection of very small and slow moving objects and targets with a low RCS (Radar Cross Section) and through a series of electronic filters is able to distinguish between the targets of interest and sea, rain and land clutter.

SharpEye™ I-Band (X-Band) transmitters are the first in their class to employ Gallium Nitride GaN power transistor technology. The significant performance benefits of GaN transistors have been harnessed to directly improve the performance of the radar.

Other differentiating technologies include Moving Target Detection (MTD) providing enhanced clutter suppression at the Doppler processing stage and pulse compression of the return signal, enabling a low transmit power, providing efficient use of the radar and reducing the probability of detection by ESM equipment. Other Doppler radars may employ less advanced techniques such as Moving Target Indication (MTI), which does not take full advantage of the radial velocity information.

SharpEye Transceiver

Customisable waveforms can be configured for specific threats and to track specific targets such UAVs, drones and helicopters. SharpEye™ is a truly multipurpose naval radar transceiver:

  • Navigation
  • Surface search
  • Helicopter control and recovery (no need for helicopter transponders, even over land)
  • Camera slew to cue
  • Bi-directional links to combat management system
  • Uniform transmission on all ranges so that multiple users on different range scales all see the optimum picture
  • Frequency diversity, user selectable frequencies to ensure interoperability

SharpEye™ Naval Tactical Radar Display

Compliant with the latest IMO radar performance standards and complete with Tactical functionality, Enhanced Target Detection (ETD) mode, twin PPI and an intuitive HCI, the SharpEye™ naval tactical radar display brings the processing advantages of the SharpEye™ radar transceiver to life.

The state of the art display is available in 22" and 26" widescreen 1920 x 1200 TFT format as a panel/console/desk-mounted display with integrated Mil-Spec processor and Windows and can be easily integrated into any bridge, CIC or operations room.

The display provides a platform for ARPA radar, Chart Radar, ECDIS and Conning display options. With 100's of features and benefits the radar display software categorizes these into the Tactical features menu, navigation features and navigation modes. The software is easily controlled with a 3 button trackball, keyboard and on screen prompts to assist the user providing:

  • Ease of operation
  • Multifunctionality enables sharing of information across workstations
  • The open architecture enables serial and digital interfaces
  • Twin PPI enables the user to build a complex picture on one PPI while leaving the other clear for collision avoidance
  • ETD mode provides a clearer picture and uses colour to differentiate between moving and stationary targets
  • ETD also helps the user to detect targets before they are strong enough to be tracked

Tactical functionality with the naval radar operator in mind (please see the Naval Radar brochure for a full listing):

  • Manual Rate Aided Track Facility (MRATS) and Synthetic Target
  • Operator Track Labelling and Target Identification
  • Sector Transmission / Single Scan
  • Sector Screens and Plan Cordon
  • ESM Bearings (Electronic Support Measures)
  • Anti-submarine Warfare - FOC, Running Torpedo (Dogbox), Plan Cordons
  • Navplans / Blind Pilotage
  • Helo Path

Modes covering the full suite of navigation features include (please see the Naval Radar brochure for a full listing):

  • Radar
  • Chart Radar
  • ECDIS (and Radar Interlay option)
  • Navigation and Conning Display
  • ETD (Enhanced Target Detection)
  • Imaging Camera
  • Simulation

Carbon Fibre Turning Unit & Housing

Kelvin Hughes has redefined the method of deployment of a naval radar transceiver and antenna through an innovative new carbon fibre housing and rotator system. SharpEye™ technology enables the transceiver to be mounted in the antenna rotator housing, the housing and yoke are composite carbon fibre materials, there is no gearbox - instead a direct drive turning mechanism, and the profile of the complete upmast system adopts a low RCS design - stealth.

The result of this innovative approach is a LRU approach SharpEye™ radar system with minimal maintenance and high reliability. Mounting the transceiver in the rotator housing brings performance and reduced installation cost benefits with no waveguide routing required. Use of composite materials preserves the mass budget and brings durability and anti-corrosion benefits.

SharpEye Upmast Hatch

Antenna Systems

Standard types include patented low profile (to reduce wind loading) 2.5m (I-Band/X-Band) and 3.9m (E/F-band/S-band) horizontally polarised slotted waveguide open array antennas. Other antenna options available from 1m to 5m and specialist antennas for submarines.

SharpEye™ systems also have an AntennaPark control, enabling the antenna to be positioned in the fore/aft or beam axis when not in use.

Integrated Bridge Systems

With a long history in providing complete IBS (Integrated Bridge Systems) Kelvin Hughes with SharpEye™ at the core of its offering, has a complete capability to design and deliver complete IBSs. Notably Kelvin Hughes is supplying the UK Royal Fleet Auxiliary's Tide Class fleet tanker IBS.

Advanced Tracker Technology

As an option, the SharpEye™ naval radar system can be supplied with an integral agile tracker to provide reliable target tracking performance against fast, highly manoeuvrable surface and air targets.

  Specifications subject to change without notice.
SharpEye™ Benefits and Features
  • Advanced capability
  • Affordable
  • Low cost of ownership
Ultra-high Reliability
  • Solid state electronics
  • Graceful degradation
  • Mil-Spec design
Clutter Suppression
  • Doppler processing
  • Small target detection
Incremental Capability
  • Capability Enhancements
  • Mission Updates
  • Useful life extension
Low Power
  • High pulse compression
Continuous Health Monitor
  • Built-in self test
  • System status monitor
Open Architecture
  • Independent display options
  • Camera/sensor interface
  • Gigabit Ethernet (ASTERIX)
  • Serial I/O
  • Fibre optic
Fully Coherent
  • Patented pulse sequence
  • Doppler processing
  • Moving Target Detection (MTD)
Blanking Sectors (Option)
  • Sectorised Transmission / Processing Modes
Specification I-Band (X-Band) E/F-band (S-band)
Operating Frequency 9.2 - 9.5 GHz 2.9 - 3.1 GHz
Frequency Diversity (FD) Optional No
Frequency Channels Non FD 12 / FD 10 8
Peak Power Up to 300W Up to 200W
Average RF Power 39W 20W
Output Power Transistor Type GaN GaAs
Duty Ratio Up to 13% Up to 10%
Pulse Compression Ratio Up to 1000:1 Up to 1000:1
Signal Processor Doppler Processing Doppler Processing
Clutter Discrimination Up to 16 filters Up to 32 filters
Clutter Suppression Automatic Automatic
Minimum Range ≤40m ≤40m
Instrumented Ranges 24nm and 48nm 24nm and 48nm
PRF 2300Hz 2300Hz
  1180Hz 1180Hz
Pulse Lengths 0.1μS - 100μS 0.1μS - 100μS
Reliability Up to 150,000 hrs MTBF Up to 150,000 hrs MTBF
Power Modes High and low power modes High and low power modes
Antenna (standard) 2.5m low profile 3.9m low profile
Horizontal ≤0.95° - 3dB ≤2.0° - 3dB
Vertical -26° -26°
Polarisation Horizontal Horizontal
Antenna Gain >31dB 28dB
Upmast System Weight (inc. standard antenna)    
Colour Light Grey - RAL7001 Light Grey - RAL7001