Wang Rui, Han Lei, Zhang Man-Na, Wang Li-Feng, Huang Qing-An
Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing, 210096, China.
Microsyst Nanoeng. 2025 May 21;11(1):99. doi: 10.1038/s41378-025-00952-0.
Parity-time (PT) symmetric resonators have an exact phase with real frequency eigenvalues and a broken phase with complex-conjugate frequency eigenvalues. In the presence of nonlinear gain, the PT-symmetric resonator exhibits nonreciprocal transmission when it is biased at the broken phase, which promises applications for isolators and circulators in modern communication systems. The nonlinear distortion performance is one of the most important metrics in most electronic applications where linearity is critical. This article provides the first experimental results of nonlinear distortion of nonreciprocal transmission in a pair of electrically coupled silicon micromechanical resonators at the broken phase. The results show the 1 dB gain compression point (P1dB) with 5 dBm and the input-referred third-order intercept point (IIP3) with 11.5 dBm.
宇称时间（PT）对称谐振器具有实频率本征值的精确相位和复共轭频率本征值的破缺相位。在存在非线性增益的情况下，PT对称谐振器在破缺相位偏置时表现出非互易传输，这为现代通信系统中的隔离器和环行器带来了应用前景。非线性失真性能是大多数线性至关重要的电子应用中最重要的指标之一。本文给出了一对电耦合硅微机械谐振器在破缺相位下非互易传输的非线性失真的首个实验结果。结果显示，1dB增益压缩点（P1dB）为5dBm，输入参考三阶截点（IIP3）为11.5dBm。
