Which of the following statements with regard to stealth technology is/are correct ? 1. Stealth objects have a very small radar cross-section and are coated with Radar Absorbing Material. 2. Stealth objects can be detected using specific frequencies. 3. Stealth objects are coated with metamaterials to increase the scattering of electromagnetic radiation. Select the answer using the code given below :
A
1 only
B
2 and 3 only
C
1 and 2 only
Correct answer
D
1, 2 and 3
Explanation
Stealth platforms reduce their radar cross-section through shaping and radar-absorbing materials, so statement 1 is correct. They are not invisible: low-frequency (VHF/UHF), multistatic or infrared sensors can still detect them, so statement 2 is correct. Metamaterial coatings are used to absorb or deflect radar energy away from the receiver, not to increase scattering, so statement 3 is wrong.
Defence TechnologyStealth technologyStealthRadar cross-sectionRadar Absorbing MaterialMetamaterialsLow-frequency radar