Digital and analogue radars
2006-06-20 22:37:29 · 4 answers · asked by gim 1 in Science & Mathematics ➔ Engineering
I'm guessing that you are asking because you are looking to purchase. With that it mind here is some info and I hope it helps!
In early radar detectors:
S - Band Radar : operates at 2 - 4 GHz
X - Band Radar : operates at 10.50-10.55 GHz (Not accurate below 20MPH)
K - Band Radar : operates at 24.05-24.25 GHz
In modern radar/ladar detectors:
Ka - Band : operates at 33.4 - 36.0 GHz (has 13 200-MHz channels, can operate in “hop” mode)
Ladar : uses light emitted at 904 nm (typical)
Advantages of Radar
*Very flexible - can be used in a number of ways (Stationary mode, Moving mode, Two Directional mode)
*Beam spread can incorporate many targets
*Can often select fastest target or best reflection
*Still very reliable
Radar Disadvantages
*Time - Radar can take up to 2 seconds to lock on
*Radar has wide beam spread (50 ft diameter over 200 ft range)
*Cannot track if deceleration is greater than one mph/second
*Large targets close to radar can saturate receiver
*Hand-held modulation can falsify readings
*More interference sources
Ladar Advantages
*Faster lock-on time (less than 1/3 second)
*Very narrow beam spread (less than 6 ft over 2000 ft range)
*Better ability to track decelerating targets
*Typically mounted, and aimed with optical targeting device
*Fewer sources of interference
*Much more difficult to detect
Problems with Ladar
*Particles (dust, water) in air can limit range
*Rounded surfaces, the colors black, blue, and violet are poor reflectors
*Can be difficult to track target
*Alignment can cause severe error
*Extreme sunlight can be damaging
Conclusions
*Ladar is, in the correct environment, better suited for speed detection
*Ladar is not perfect, however
*There is still room for Radar patrolling
*Both could be used in concert to achieve maximum detection capabilities
2006-07-02 10:12:18 · answer #1 · answered by Tommy 6 · 4⤊ 0⤋
Just one more "extremely important" band that you "must have" in order to be protected from the police. You don't need that many bands from on a radar detector because most of those bands that the radar detector (most likely a cobra) detects aren't any that cops use. Just make sure that you have superwide Ka. That's a big one.
2016-05-20 08:15:13 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Older detectors tend to only detect radar frequencies in use when they were made. As new radar devices are created different frequency bands are used that may not be detected. in addition, older detectors cannot detect LADAR, or laser radar.
2006-06-21 12:55:25 · answer #3 · answered by aquachimera 3 · 0⤊ 0⤋
that they detect different things i guess
2006-06-20 23:26:43 · answer #4 · answered by Anonymous · 0⤊ 0⤋