A frequency selective surface with integrated limiter for receiver protection

The design and simulation of a frequency selective surface (FSS) with integrated limiter for receiver-protection are presented. The FSS operates as normal until a certain power threshold is reached, at which point the temperature increase triggers a dramatic resistance change across the element, and the insertion loss changes from 0.2 dB to 20 dB. The limiting action is completely passive and automatically reversible. By placing the limiter outside of the system, no portion of the front-end risks damage from high-power signals, a level of protection not offered in conventional limiters. Finally, the design is compatible with standard lithography processes, requires no diodes, ferrites, or additional components, and can potentially be integrated on flexible substrates.