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Navico BR24 Radar Odin Sletten Technical Sales Engineer Navico Denmark
© Navico Company Confidential2 A Short History of Radar In 1917, Nikola Tesla first established the principles for primitive radar units In 1935, The British invented and patented the first radar for aircraft defence In 1950, Decca introduced the first marine pulse radar utilising a magnetron, which eventually trickled down into recreational boats…
© Navico Company Confidential3 60 Years of Development
© Navico Company Confidential4 Weaknesses of Traditional Radar User expertise required – Blurs and distorts objects, making it difficult to interpret surroundings and navigate safely – Obscures objects closest to the boat, where visibility is most important for collision avoidance – Difficulty distinguishing targets from clutter - requires experience to safely operate Inconvenient installation and operation – Magnetron takes several inconvenient minutes to warm up – Magnetron has a limited life, and is expensive to replace – Large cables and connectors – Power consumption is impractical for small boats and most sailboats – Emissions require mounting away from humans and other electronic equipment. Most small boats have no room at all
© Navico Company Confidential5 First X-band Radome Radar
© Navico Company Confidential6 Navicos BroadBand Radar Revolutionary improvement in situational awareness - the best short- range resolution and target discrimination of any X-band marine radar – Radar is finally easy enough for a novice – identifies targets clearly with no tune control, as sea and rain clutter rejection is 5-10 times better than a pulse radar – Navigation is truly easy, even at an unprecedented 1/32 NM range, with unparalleled resolution and clarity within two metres of the dome, with no main bang, zero range adjust, or close-range sidelobe distortion
© Navico Company Confidential7 Close Range Performance
© Navico Company Confidential8 Comparison and Main bang 4 kW HD pulse radar, 1/8 NM rangeBroadBand Radar, 1/16 NM range main bang
© Navico Company Confidential9 Comparison and Main bang 4 kW HD pulse radar, 1/8 NM rangeBroadband Radar, 1/16 NM range main bang suppression
© Navico Company Confidential10 Close Range Performance
© Navico Company Confidential11 Moored boat 4 kW HD pulse radar Broadband Radar Approximate position of boat Close Range Performance Foot bridge
© Navico Company Confidential12 Superb Resolution 4 kW HD Pulse Radar BroadBand Radar Pile moorings Moored boat
© Navico Company Confidential13 Seaclutter Performance 4 kW HD pulse radar, 1/2nm Sea clutter rejection 50% Two boats, towing into the harbour BroadBand Radar ¼ NM No sea clutter rejection applied
What makes the difference?
© Navico Company Confidential15 Traditional Radar The radar transmits a powerful, but very short pulse, at a fixed frequency. The pulse propagates outwards in a direction determined by the angle of the rotating radar antenna at the time of transmission. The radar then switches to receive mode to listen for reflections. If the pulse reflects off an object, it will return to the receiver with a delay proportional to the distance of the object from the transmitter. The antenna angle at the time of pulse transmission equals the direction of the object.
© Navico Company Confidential16 BroadBand Radar FMCW = Frequency Modulated Continuous Wave Transmits a rising tone (Tx wave) with linear increasing frequency The wave propagates out from the transmitter retaining the frequency it had when it was transmitted If it reflects off an object, it will return to the receiver, still at the frequency it had when originally transmitted Meanwhile the transmitter continues to output an increasing frequency Frequency Time 1ms 4ms 9.41GHz 9.4GHz
© Navico Company Confidential17 BroadBand Radar Frequency Difference in Transmitted and Received Signals The difference in the currently transmitted and currently received frequencies, coupled with the known rate of frequency increase, allows a time of flight to be calculated, from which we can calculate distance. Frequency Time At any instant in time, Tx freq is higher than Rx freq TxRx – retains same frequency it had when it was transmitted Time delay
© Navico Company Confidential19 Solid State – No Magnetron Start faster, go longer - 100% solid state RF design – no magnetron! Provides InstantOn power up and low power consumption – Eliminates 2-3 minutes warm-up time typical of magnetron pulse radars – Conserves power; operating power drain is ~30% less than the best 2 kW radar (<1/20 in standby mode) – extremely beneficial for sailboats and smaller power boats – No limit on transmit usage lifetime – typically 2-3,000 hours for a magnetron pulse radar
© Navico Company Confidential20 Two Antenna Arrays RX TX
© Navico Company Confidential21 Totally Safe Incredibly approachable - Totally safe RF transmitted emissions and flexible installation setup allows you to mount the radome anywhere – Extremely low power - less than 1/10th of the transmitted emissions of a mobile phone; install in any position, even on the smallest of boats
© Navico Company Confidential22 Proven Safety Page 22 Conclusion: Human exposure level to radiation outside the radome is 0.45 W/m2, well below the general public safety emission level of 10 W/m2. Included is the possible case of mechanical failure of the motor or drive belt with the antenna pointing into a fixed direction. 2,8 m (9.3 ft)Standard 4 kW pulse radar 0 m (0 ft)New Navico Broadband radar 1,4 m (4.6 ft)Standard 2 kW pulse radar Safe DistanceRadar Type
© Navico Company Confidential23 Easy Installation Incredibly approachable - Totally safe RF transmit emissions and flexible installation setup allows you to mount the radome anywhere – Extremely low power - less than 1/10th of the transmitted emissions of a mobile phone; install in any position, even on the smallest of boats – Super small custom 13.5 mm RJ45 connector and round 9 mm pre-connected radar cable allows simple bridge tube installations
© Navico Company Confidential24 Radar Interface Radar Interface Box Fully watertight Small RJ45 connector
© Navico Company Confidential25 Connector Radar Dome Connection External watertight connector Same footprint as todays 2 kW scanner
© Navico Company Confidential26 Mutltiple Displays Incredibly approachable - Totally safe RF transmit emissions and flexible installation setup allows you to mount the radome anywhere – Extremely low power - less than 1/10th of the transmitted emissions of a mobile phone; install in any position, even on the smallest of boats – Super small custom 13.5 mm RJ45 connector and round 9 mm pre-connected radar cable allows simple bridge tube installations – Compatible with a wide range of Navico multifunction displays and heading sensors
© Navico Company Confidential27 Multiple Displays HDS-5 HDS-5m HDS-5x HDS-7 HDS-7m HDS-8 HDS-8m HDS-10 HDS-10m GB40 NX45 12 NX40 8 NSE8 NSE12
© Navico Company Confidential28 Super high resolution No blind spot at center (mainbang) Totally safe, 0.1 W TX – install anywhere InstantOn – no warm up time Lower power consumption, no standby power Five times better sea and rain clutter performance Easy to install – very small connector The Highlights
© Navico Company Confidential29 The Differences Between Pulse and FMCW Radars Inherent Differences between the technologies CharacteristicBroadband (FMCW)Pulse Short range target detectionBetterWorse Long range target detectionWorseBetter Visibility of close in targetsBetterWorse Target resolution in azimuthSame Target resolution in rangeBetterWorse Sea clutter suppressionBetterWorse Power requirementsSimilar Requires standby periodNoYes Vulnerability to interference from other radarsDifficult to solveEasy to solve Vulnerability to onboard reflectorsPotentially a problemNot a problem Potential for future developmentOnly just begunMature technology Summary from a Technical Briefing by Bill Mullarkey from Navigate-us.com N.B This was purely from theoretical analysis, no practical testing was made
© Navico Company Confidential30 Long Range Performance Maximum range for any radar under ideal circumstances: Scanner height Target Object at sea levelSmall boat (2 m high) Big launch (6 m high) 2 metres 3.1 miles6.3 miles8.5 miles 3 metres 3.8 miles7.0 miles9.2 miles 4 metres 4.4 miles7.5 miles9.8 miles __________________________________________________________________________ So….. there is no possible way a radar on a small/medium boat can see a large launch at more than 10 miles But… It may be possible to see rain or high land features beyond 10 miles.
© Navico Company Confidential31 Further Enhancement Navicos R&D teams have developed technologies, which bring interference from other radar and onboard reflectors to a minimum or even totally eliminates them. This also means we are not depending on already patented technologies, which would have influenced the price of the radar.
© Navico Company Confidential32 Power Requirements Power consumption transmitting is only 17 W 30% less than a 2 kW radar 50% less than a 4 kW radar Power consumption in standby is only 1.6 W The BroadBand radar has no magnetron to heat!
© Navico Company Confidential33 Not Considered in the Report The very low TX power of the BroadBand radar will often not trigger Racons and SARTs. Racons are active radar reflectors on some major buoys used mainly by commercial vessels for long distance radar navigation. The BroadBand radar cannot be used as the primary radar for rescue vessels, but serves as an outstanding no. 2 radar for close range search.
© Navico Company Confidential34 Additional Benefits No 30 m blind spot at centre (mainbang) Easy to operate. No tuning or adjusting required Very low sidelobe effects Totally safe, 0.1 W TX – install anywhere No magnetron that wears out over time Easy to install – 9 mm cable and very small connector Easy to dismantle – external connector at radome
Thank you Questions?
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