Recently, a significant breakthrough in the field of non-Hermitian wireless sensing has been achieved through the collaborative efforts of the School of Electronics at Peking University and the Advanced Electromagnetic Regulation and Energy Conversion Technology Research Center at the School of Electrical Engineering, Xi’an Jiaotong University. The research team, led by Professor Tianyu Dong, introduced the innovative concept of a universal non-Hermitian critical point for the first time. Additionally, they designed a cutting-edge electronic circuit architecture tailored for wireless sensing applications. This new architecture facilitates real-time wireless monitoring of weak signals with exceptional precision, over long distances, and with a high signal-to-noise ratio.

The team’s findings have been published in the prestigious journal Science Advances. The proposed architecture utilizes a non-equilibrium gain-loss configuration, effectively surmounting the limitations inherent in traditional and parity-time (PT)-symmetric architectures. It successfully addresses the challenge of balancing sensing sensitivity, signal-to-noise ratio, and coupling strength, which has long been a trade-off in the field.

Experimental results demonstrate that this architecture excels in both coupling coefficient sensing and asymmetric capacitance sensing. It significantly enhances detection limits while maintaining stable operation even in complex environments. Moreover, the versatility of this architecture extends beyond sensing applications; it also holds promise for wireless power transmission, offering a novel pathway for efficient and reliable wireless power supply.