US 12,405,340 B1
Direction-finding device based on coupled and detuned spoof localized surface plasmons
Fei Gao, Hangzhou (CN); Yumeng Yang, Hangzhou (CN); and Hongsheng Chen, Hangzhou (CN)
Assigned to ZHEJIANG UNIVERSITY, Hangzhou (CN)
Filed by ZHEJIANG UNIVERSITY, Zhejiang (CN)
Filed on Feb. 18, 2025, as Appl. No. 19/056,637.
Application 19/056,637 is a continuation of application No. PCT/CN2024/080245, filed on Mar. 6, 2024.
Claims priority of application No. 202410226232.2 (CN), filed on Feb. 29, 2024.
Int. Cl. G01S 3/781 (2006.01); G02B 5/00 (2006.01)
CPC G01S 3/781 (2013.01) [G02B 5/008 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A direction-finding device based on coupled and detuned spoof localized surface plasmons, comprising:
a dielectric substrate with a metal coating at a bottom;
two evenly-grooved metal discs with different sizes or materials, representing a first spoof localized surface plasmonic resonator SLSP1 and a second spoof localized surface plasmonic resonator SLSP2 that have different resonance frequencies,
wherein the first spoof localized surface plasmonic resonator SLSP1 and the second spoof localized surface plasmonic resonator SLSP2, are distributed on the dielectric substrate along a diagonal of the dielectric substrate, with a center of the dielectric substrate as a symmetrical center, to form a coupled and detuned spoof localized surface plasmonic system;
a first probe and a second probe respectively provided adjacent to the first spoof localized surface plasmonic resonator SLSP1 and the second spoof localized surface plasmonic resonator SLSP2, and configured to detect electric fields of the first spoof localized surface plasmonic resonator SLSP1 and the second spoof localized surface plasmonic resonator SLSP2; and
a signal processing circuit connected to the first probe and the second probe and configured to obtain an electric-field phase difference between the first spoof localized surface plasmonic resonator SLSP1 and the second spoof localized surface plasmonic resonator SLSP2 under an illumination of an incident wave; and determine directions of incoming waves based on a monotonous correspondence between the electric-field phase difference and an incident angle of the incoming waves.