The BR-3503 Doppler radar antenna utilizes the Doppler principle to measure the velocity of moving objects. This radar can be used in a variety of application such as projectile muzzle velocity, in-bore measurement, very short range velocity measurement, etc. It is a great alternative to optical chronographs.
The BR-3503 can be identified as the big brother of the BR-3502, sharing a lot of features but with a higher gain improving the possible range of the radar. It remains a solution that is easy to deploy and use. It works at 35.5GHz and provides more than 3 times better resolution than a 10.5GHz (X-Band) radar, and can therefore be used on very small projectile calibers (ex: 1mm spheres). The BR-3503 is particularly well suited for interior ballistic ranges where very short range measurements (down to few meters) are performed. It can also be used outside for short and medium range measurements, depending on projectile caliber.
The BR-3503 has been designed for short-range applications, even considering its higher gain when compared to its little brother (BR-3502). The following table summarizes the expected range performance for different projectile calibers. Actual performance can vary slightly based on projectile shape and material as well as test conditions.