What type of sheet is an R-Card?

An R-Card, or Reflectivity Card, is classified as a resistive sheet. This type of sheet is specifically designed to have properties that limit or reduce the reflection of radar waves, thereby playing a crucial role in radar cross-section reduction for low observable aircraft. The material of an R-Card is tailored to absorb radar energy, which minimizes the signature the aircraft presents to enemy radar systems. This absorption is essential for maintaining stealth characteristics in military applications.

Resistive materials can effectively reduce radar reflections, contributing to the overall performance of stealth technology, making them essential in the design and maintenance of low observable aircraft structures.