Self-Shielded Topological Receiver Protectors

TL;DR

This paper introduces a novel topological receiver protector that uses a coupled-resonator microwave waveguide with a defect mode, providing robust, self-shielding protection against high-power signals while maintaining low power transmittance.

Contribution

It presents a new topological, self-shielding receiver protector based on coupled resonators with a defect mode, demonstrating robustness and high power handling capabilities.

Findings

High transmittance at low powers due to topological defect mode

Self-induced resonant trapping leads to transmittance suppression at high powers

Device is self-protected from overheating and electrical breakdown

Abstract

Receiver protectors (RPs) shield sensitive electronics from high-power incoming signals that might damage them. Typical RP schemes range from simple fusing and PIN diodes, to superconducting circuits and plasma cells - each having a variety of drawbacks ranging from unacceptable system downtime and self-destruction to significant insertion losses and power consumption. Here, we theoretically propose and experimentally demonstrate a unique self-shielding RP based on a coupled-resonator-microwave-waveguide (CRMW) with a topological defect being inductively coupled to a diode. This RP utilizes a charge-conjugation (C) symmetric resonant defect mode that is robust against disorder and demonstrates high transmittance at low incident powers. When incident power exceeds a critical value, a self-induced resonant trapping effect occurs leading to a dramatic suppression of transmittance and a simultaneous increase of the reflectance close to unity. The proposed RP device is self-protected from overheating and electrical breakdown and can be utilized in radars, reflection altimeters, and a broad range of communication systems.