Question

Describe one method of reducing undesirable or unwanted reflections in radar operations

a. Using a transmitting frequency that tends to be reflected by objects such as aircraft but is absorbed by most other objects
b. Changing the receivers threshold
c. Changing the receivers gain
d. All of the above

Answer 1

Reducing unwanted radar reflections can be done by changing the receiver's threshold to distinguish between significant and trivial reflections, or by designing objects with materials and shapes that absorb or scatter radar waves.

Step-by-step explanation:

One method of reducing undesirable or unwanted reflections in radar operations is by changing the receiver's threshold. This adjustment helps to discern between significant reflections, like those from aircraft, and less important ones, potentially reducing noise and false echoes. By raising the threshold, weaker signals generated by insignificant objects can be ignored, while stronger reflections from relevant objects continue to be processed. However, it's important to note that this method should be carefully managed to avoid missing critical returns from smaller or more distant objects.

Another common practice is to use materials or shapes that absorb or scatter radar waves to make an object less visible to radar. This includes materials with suitable electromagnetic properties or airframe designs that do not have right angles that would reflect radar waves back to the source.