Active low frequency band expansion mechanism of electromagnetic wave absorber composite structure

TY - JOUR

T1 - Active low frequency band expansion mechanism of electromagnetic wave absorber composite structure

AU - Zhang, Rui

AU - Cao, Xiaobo

AU - Chen, Xu

AU - Yuan, Xujin

AU - Gao, Yanze

AU - Sun, Yingjian

AU - Chen, Mingji

N1 - Publisher Copyright: © 2024 IOP Publishing Ltd

PY - 2024/4/1

Y1 - 2024/4/1

N2 - Bandwidth expansion of modern antennas and communication systems raises growing demand for electromagnetic wave absorber in compatibility equipment. Single absorption mechanism is hard to reach well-balanced characteristics including wide bandwidth, low frequency absorption and small thickness. Based on the composite structure concept, composite structure for electromagnetic wave absorber’s active low frequency band expansion is proposed, by combining circuit-analog absorber and active absorber to form a superimposed structure. The characteristic of composite structure is better than the single absorber structure, which improves enhancement mechanism brought by the composite structure. Sample fabrication and experiments indicate reflectivity curve envelope reaches −10 dB in 2.15-18 GHz frequency range (relative bandwidth 157.3%), and the tunable absorption frequency range in low-frequency domain is greater than 1.3 GHz. The structure has good adaptation on TE and TM polarizations, as well as good angle insensitivity. This composite structure has application potential in intelligent response system related with electromagnetic compatibility, energy absorption and object security management.

AB - Bandwidth expansion of modern antennas and communication systems raises growing demand for electromagnetic wave absorber in compatibility equipment. Single absorption mechanism is hard to reach well-balanced characteristics including wide bandwidth, low frequency absorption and small thickness. Based on the composite structure concept, composite structure for electromagnetic wave absorber’s active low frequency band expansion is proposed, by combining circuit-analog absorber and active absorber to form a superimposed structure. The characteristic of composite structure is better than the single absorber structure, which improves enhancement mechanism brought by the composite structure. Sample fabrication and experiments indicate reflectivity curve envelope reaches −10 dB in 2.15-18 GHz frequency range (relative bandwidth 157.3%), and the tunable absorption frequency range in low-frequency domain is greater than 1.3 GHz. The structure has good adaptation on TE and TM polarizations, as well as good angle insensitivity. This composite structure has application potential in intelligent response system related with electromagnetic compatibility, energy absorption and object security management.

KW - active modulation

KW - composite structure

KW - electromagnetic wave absorption

KW - low-frequency expansion

UR - https://www.scopus.com/pages/publications/85188529902

U2 - 10.1088/1402-4896/ad3304

DO - 10.1088/1402-4896/ad3304

M3 - Article

AN - SCOPUS:85188529902

SN - 0031-8949

VL - 99

JO - Physica Scripta

JF - Physica Scripta

IS - 4

M1 - 045520

ER -