Question

In: Chemistry

12) You need to reduce the radar cross-section of your company’s new plane.   It already has...

12) You need to reduce the radar cross-section of your company’s new plane.   It already has been built according to principle of radar dispersion, so you must find a materials solution.?

Please explain in clear words. Thanks

Solutions

Expert Solution

Radar cross-section (RCS) is a measure of how detectable an object is with a radar. A larger RCS indicates that an object is more easily detected. The RCS of a radar target is the hypothetical area required to intercept the transmitted power density at the target such that if the total intercepted power were re-radiated isotropically, the power density actually observed at the receiver is produced. This is a complex statement that can be understood by examining the monostatic (radar transmitter and receiver co-located) radar equation one term at a time:

                     

where Pt= power transmitted by the radar (watts), Gt= gain of the radar transmit antenna (dimensionless), r=distance from the radar to the target (meters), σ= radar cross-section of the target (meters squared), A_eff=effective area of the radar receiving antenna (meters square), Pr= power received back from the target by the radar (watts).

So, inorder to reduce the radar cross section of the new planes, the company has to modify the size of the materials so as to increase the effective area of the radar receiving antenna (decreasing size of material increases the effective surface area). As radar cross-section of the target (σ) is inversely propertional to the effective area of the radar receiving antenna (A_eff), an increase in A_eff can insure that the value of radar cross-section will decrease.

queen_honey_blossom answered 5 hours ago
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