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, with a topological defect being inductively coupled to a diode. This RP utilizes a charge-conjugation- ($\mathcal{C}$) symmetric resonant-defect mode that is robust against disorder and demonstrates high transmittance at low incident powers. When the 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.

中文翻译：

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自屏蔽拓扑接收器保护器

接收器保护器（RPs）保护敏感的电子设备免受可能损坏它们的大功率输入信号的伤害。典型的RP方案的范围从简单的熔断和PIN二极管到超导电路和等离子电池-每种方案都有各种缺点，从无法接受的系统停机时间和自毁性到显着的插入损耗和功耗。在这里，我们从理论上提出并通过实验证明了一种基于耦合谐振器微波波导的独特的自屏蔽RP，其拓扑缺陷被感应耦合至二极管。该RP利用电荷共轭-（$\mathcal{C}$）对称共振缺陷模式，可抵抗无序干扰并在低入射功率下显示出高透射率。当入射功率超过临界值时，会发生自感应共振陷获效应，从而导致透射率的显着抑制和反射率的同时增加，接近于1。所提出的RP设备具有过热和电击穿的自我保护功能，可用于雷达，反射高度计和广泛的通信系统中。