COMPOSITE MATERIALS AND ELECTROMAGNETIC BASED STRUCTURE FOR STEALTH APPLICATION

Abstract

Stealth technology which is also termed as low observable technology is a crucial part of military tactics and passive Electronic counter Measures. The term Stealth is not only associated with the military aircraft, but is also associated with military submarines, ships, missiles and satellites. It makes them less visible to radar, infrared, sonar and other detection methods. It corresponds to military camouflage for these parts of electromagnetic spectrum. This technology has evolved over the years as a multi-disciplinary subject and starting from 1940’s various techniques have been developed in order to reduce the radar signature of the aircraft or asset of ground. Thus reduction of EM signature pivots around minimizing the radar cross-section of the target. Several techniques which are in vogue to achieve this objective, including Radar Absorbing Materials (RAM), Frequency Selective Surface (FSS) and Multilayer FSS in conjugation with RAM. This report focuses on the Electro Magnetic structure and Composite material based techniques to reduce the radar signature of the aircraft.