Abstract
This paper investigates electromagnetics (EM) wave absorber with modified checkerboard surface pattern configured with broadside SRR. There are three proposed absorbers which all were designed on FR-4 substrate with 1.2mm thickness. Each of these absorbers has a single resonant frequency at 8.41 GHz, 9.75 GHz, and 10.65 GHz for absorber A, B, and C, respectively. The three proposed absorbers are used to construct a checkerboard absorber surface pattern with several variations. From the simulation result, we found that a combination of two absorbers with a checkerboard pattern can create dual resonant frequencies. The combination of A and B absorber has a dual resonant frequency at 8.91 GHz and 9.78 GHz of resonant frequencies, the combination of A and C absorber has a dual resonant frequency at 8.9 GHz and 11.08 GHz of resonant frequencies, while the combination of B and C absorber has 9.79 GHz and 10.98 GHz of resonant frequencies. By combining A, B, and C with the proposed combination, the simulation result shows that it can achieve triple resonant frequency at 8.89 GHz, 9.77 GHz, and 10.96 GHz while achieving a minimum return loss of -29.6 dB.
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