Question

The range of radar is:
A). Directly proportional to the gain of the radar antenna.
B). Directly proportional to the minimum detectable signal by the receiver.
C). Inversely proportional to the gain of the radar antenna
D). Inversely proportional the transmitted power.

Answer 1

Hint: The RADAR is the Radio Detection and Ranging. The radar is used for detection and tracking to aircraft, spacecraft, ships etc. Basically it measures the property of the atmosphere as well as the properties of oceans.

Complete answer:
The maximum range of the Radar for given specifications is 128km.
The minimum range is defined by the pulse width.
The time for the radar pulse to travel from the radar to a target 1 mile.
Radar range is increased by the peak power.
Radar waves travel through the atmosphere at roughly $3 \times {10^5}$km per second. It is equivalent to the range of the speed light.
The range to a target is set on by measuring the time that a radar signal takes to travel out to the target and the back.
The basic principle of the radar is tremendously the short break out in the radio energy is broadcasted, reflected off a target and then given back as an echo. Radar form that the use of occurrence, that we have observed.
The minimum detectable signal depends on the receiver bandwidth, weather conditions and the noise.
So, the range of radar is directly proportional to the minimum detectable signal by the receiver.
So, the option (B) is correct.

Note: The radar can detect the objects through the clouds but their accuracy rate is affected by the weather conditions like rain, smog as well as clouds. The radar systems work in a broad band of the transmitted frequency. The higher frequency of the radar system, then the more it is affected by the weather conditions like rain as well as clouds.
A narrow band width receiver will be more sensitive than the wider bandwidth receiver.