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Author Topic:   Low Power Broadband Radar - Coming Soon
Moe posted 12-24-2008 12:27 PM ET (US)   Profile for Moe   Send Email to Moe  
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swist posted 12-25-2008 07:28 AM ET (US)     Profile for swist  Send Email to swist     
This is pretty interesting, but I would like to read exactly what is different about this technology? Current marine radars have had computer-processed data for years to help target resolution and provide a more realistic picture than the old "rotating beam with blips" first generation radar.

What does "broadband" mean in the context of radar? Is the frequency different? The beam width/angle/etc?

jimh posted 12-25-2008 11:16 AM ET (US)     Profile for jimh  Send Email to jimh     
Swist--Your question is a good one. What does "broadband" mean in a RADAR set?

The term "broadband" seem to be the newest buzz word, replacing "digital" which had a long reign.

Well, well--it turns out there is something to "broadband" RADAR more than just a buzz word. Here is the technical foundation:

Broadband Radar sends a continuous transmission wave with linear increasing frequency (hence the term Broadband). The wave retains its frequency as it travels out and reflects back from any objects. Meanwhile, the transmitter continues to output an increasing frequency. The difference between the currently transmitted and received frequencies, coupled with the known rate of frequency increase, is the basis for precisely calculating a "time of flight" and target distance. Since FMCW constantly builds up radar return energy (vs. a single pulse), this system provides target detection superior to pulse radars while transmitting at far lower energy levels.

- The exclusive technology and performance characteristics of Broadband Radar make it an ideal match for almost any vessel.

- Unparalleled short-range resolution and discrimination; an ideal compliment to large radar systems on yachts.

- User-friendly operation makes it an ideal primary radar for small to medium-sized vessels.

- Small size, minimal power requirements, safer transmission energy levels; the advantages of sophisticated radar for all boats

See: The-Technology/

Broadband RADAR is quite different than conventional pulsed RADAR. It uses a continuous wave. Hey--you've got to admire that!

Hoosier posted 12-26-2008 08:23 PM ET (US)     Profile for Hoosier  Send Email to Hoosier     
It's interesting that Navinco is again using the "Broadband" term to describe frequency modulation, now referring to a RADAR. They also used it in the Lowrance Broadband Sounder. The description of FM RADAR is also what goes on with FM SONAR. We went into this here:

alfred posted 12-27-2008 11:16 PM ET (US)     Profile for alfred  Send Email to alfred     
First I will admit that I know nuts about the tech side of these things, but broadband sounders provide a much better picture at a greater depth then regular sounders.

I was very surprised that the broadband sounder with a 600watt tranny was able to pick up individual fish (grey band cod) at 250m. We dropped on the fish and it took the jig and we could actually follow the fish up on the sounder.

The sounder was setup for a test so that we could by pass the broadband module and the difference was day and night!

If the same difference is available to radar, I am sure it will be an improvement over the existing systems.

I know where my money is going when I do a sounder upgrade.

jimh posted 12-28-2008 10:08 PM ET (US)     Profile for jimh  Send Email to jimh     
Although the term "broadband" is used in regard to both RADAR and SONAR, the technique to which it refers is not the same. SONAR still uses a burst transmission technique in its "broadband" products. RADAR uses a continuous wave frequency modulation transmission technique in its "broadband" products. I am afraid that "broadband" has already become the new "digital" in which it becomes just a word and its meaning is not clear to consumers.

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