Multiple Frequencies Signal Absorber for Anti-Radar Applications in High Speed Flying Devices

The conventional anti-radar technology based on absorber can only work on a single frequency causing an anti-radar system can still detect when another frequency is used. This paper proposes an active anti-radar technology based on absorber working on multiple frequencies for flying objects, such as drones, missiles, and aircraft, by absorbing any radar signals with multiple frequencies. The absorber is a coating metamaterial on the surface of flying devices consisting of square metamaterial and varactor diode to absorb radar signals. This paper considers Active Frequency Selective Surface (AFSS) for designing absorber patch and simulates using a series of com-puter simulations. The simulation results show that absorption of signals with several frequency is possible with an absorption rate of more than 90 %, which is indicating that absorption of radar signals with multiple frequencies is possible and promising.