TY - JOUR
T1 - Deep understanding of impedance matching and quarter wavelength theory in electromagnetic wave absorption
AU - Wang, Tao
AU - Chen, Geng
AU - Zhu, Jiahao
AU - Gong, Hang
AU - Zhang, Limin
AU - Wu, Hongjing
N1 - Publisher Copyright:
© 2021 Elsevier Inc.
PY - 2021/8
Y1 - 2021/8
N2 - It is of great significance for absorber designers to correctly understand impedance matching and its related calculation methods, because excellent impedance matching effect is an important prerequisite for absorber to consume electromagnetic wave (EMW). However, there are some problems in literatures, such as the lack of deep understanding of impedance matching and application conditions of Eq. (3) for the calculation of reflection loss (RL). Based on the transmission line theory of electronic circuit, this paper expounds the definition, symbol, property of various impedances and their influence on impedance matching effect. On the basis of simplifying the actual situation in the process of EMW absorption to the correct transmission line model, the original transmission line model of RL calculation formula and its limitation are pointed out. The doubts about the validity of the quarter wavelength theory in literatures are explained from three aspects: the reduction of EMW length, the multiple reflection and the impedance transformation of absorber.
AB - It is of great significance for absorber designers to correctly understand impedance matching and its related calculation methods, because excellent impedance matching effect is an important prerequisite for absorber to consume electromagnetic wave (EMW). However, there are some problems in literatures, such as the lack of deep understanding of impedance matching and application conditions of Eq. (3) for the calculation of reflection loss (RL). Based on the transmission line theory of electronic circuit, this paper expounds the definition, symbol, property of various impedances and their influence on impedance matching effect. On the basis of simplifying the actual situation in the process of EMW absorption to the correct transmission line model, the original transmission line model of RL calculation formula and its limitation are pointed out. The doubts about the validity of the quarter wavelength theory in literatures are explained from three aspects: the reduction of EMW length, the multiple reflection and the impedance transformation of absorber.
KW - Impedance matching
KW - Quarter wavelength theory
KW - Reflection loss (RL)
UR - http://www.scopus.com/inward/record.url?scp=85103663192&partnerID=8YFLogxK
U2 - 10.1016/j.jcis.2021.03.132
DO - 10.1016/j.jcis.2021.03.132
M3 - 文献综述
C2 - 33813219
AN - SCOPUS:85103663192
SN - 0021-9797
VL - 595
SP - 1
EP - 5
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -