Page 93 - MSAM-3-3

Materials Science in Additive Manufacturing Wide-angle broadband MMA with CB-CIP/PLA

A B

C D

E

Figure 6. Effect of geometric parameters of the stepped square hole structure (A) R, (B) W, (C) H, (D) H , and (E) H on reflection loss in the frequency
2
1
range of 2 – 18 GHz
Abbreviations: R: Maximum hole radius; W: Wall thickness; H, H , H : Height
1 2
normal incidence. As the polarization angle increases 3.4. Microwave absorption performance of the SSH
from 0° to 90°, the electromagnetic wave changes from the structure at different incident angles
transverse electric (TE) mode to the transverse magnetic Figures 8 and 9 demonstrate the influence of incident
(TM) mode. However, the RL curves remain unchanged. angle on the absorption performance of the SSH structure
This indicates that the SSH structure is least affected by the in the TE and TM modes, respectively. As the incident
polarization direction of electromagnetic waves, exhibiting angle increases, both the RL peak and the corresponding
insensitivity to polarization. As the SSH structure is nearly frequency for the peak decrease in the TE and TM
center symmetric, the incident electromagnetic waves with modes. In the TE mode, when the incident angle is 40°,
different polarization directions have the same resonance the bandwidth (13.6 GHz) is 96.9% of the bandwidth
characteristics. (14.032 GHz) at the incident angle of 0°. At an incident

Volume 3 Issue 3 (2024) 6 doi: 10.36922/msam.4158