Is the operating Frequency band of Radarxense radars future proof?
Yes, the radars operate in the 24.125 GHz ISM band with a bandwidth of max. 250MHz. This band is worldwide allocated for generic radio/radar applications. The output power does not exceed 20 dBm. This makes the modules ideal for all sorts of applications.
This frequency band should not be confused with the 24GHz/ 1GHz bandwidth band, which is currently still in use for short range automotive applications.
Can we buy the radar also without housing?
Radarxense delivers the radars as a complete module. This means including housing and connector. There is a strong preference for supplying the complete module as this guarantees the optimum performance of the unit. The radome material is optimized for the 24GHz radar and its aluminum housing ensures good EMC and EMI performance. The radar is also well protected as the housing is IP67 rated.
For volume applications, customized housings can be discussed.
Can we use the Radarxense level measurement radar as an altimeter?
This depends on the vehicle/aircraft. If is it a slow moving object, like a helicopter or balloon, it is possible to use the level measurement radar as a relative close range altimeter (<30m). If an aircraft travels faster, it becomes more difficult. In general, the velocity of the aircraft should not exceed 50km/h, otherwise a level measurement radar from the RXS-R-xx series is not recommended.
The radar beam should be aimed as perpendicular to the ground surface as possible, otherwise the transmitted RF power will bounce away. If no RF power is received, a good measurement is not possible.
Why should we mount the speed over ground radar with a tilt of 10 degrees?
The speed information a radar receives is based on the Doppler frequency. This Doppler frequency is a direct derivative of the radial speed; so the speed in the direct line of sight of the radar. If a radar module is installed under an angle, the radial speed is not the same as the true speed. One should use a correction factor, which is the cosine of the installation angle. Radarxense programs this correction factor in the radar. So the output of the radar consists of the true speed over ground. It is possible to mount the radar under a larger angle, but the accuracy will become less. We do not recommend to install the radar under angles larger then 25 degrees, in order to achieve accurate speed reading (<1%).
How does a 10 degree tilt installation look like?
With 10 degrees tilt we mean 10 degrees tilt starting from a vertical position.
A drawing of this typical installation is shown here below.
How accurate is the speed measured by the Radarxense radars?
The speed accuracy depends on the installation, see the question on the speed over ground also. With proper installation, the performance allows the radars to be used in speed enforcement applications.
What is the difference between resolution and accuracy?
Many people confuse accuracy with resolution. As the ISM bandwidth is limited to 250MHz, the radar can not distinguish two objects if the difference in radial distance is less then 0.75 meter apart. This is the resolution. Once a target is located, the distance can be measured precisely. In case of level measurement the accuracy is around a few centimeters. In case of a moving target roughly, the accuracy is typically 30 centimeters.
What is the maximum detection range of the radars?
This strongly depends on the target. Each object has it’s own Radar Cross Section (RCS). This is the effective cross section of an object seen by the radar. This can vary quite a bit from the cross section as seen by a human. A metal object with sharp corners can have a RCS of a few square meters, while a human body only has a RCS similar to a soda can.
If one would like to measure a human being, it will also make a difference if this is in an open area or between strong reflectors like cars. In general, cars can be measured a few hundred meters, while people can be measured up to 25 meters ~30 meters. Please contact us with your specific application/questions if you have any doubt.
Is it possible to have a demonstration or evaluation of a Radarxense product for my application?
Yes, our application team can discuss with you to determine the logistics for such a trial. We can also arrange expert staff to be available to make this exercise with you.
How do I interface with Radarxense radar modules?
Our radar modules are equipped with open collector outputs or a serial line output or a combination of both. In order to interface over a serial line with a Radarxense module a convertor module might be necessary.
For example the RXS-DR-10 is equipped with a RS422 serial line output. If one would like to interface with this radar module with use of a laptop/pc, a convertor is required to convert the RS422 serial line to RS232 or USB depending on the available interface of the laptop/pc.
Software to interface with the radar module to capture, display and analyze the measured data can be shared on request.