Abstract: This paper presents a laminated glass for GSM shielding and WLAN isolation, a frequency selective surface (FSS) with a layer of ring and tripole slot elements embedded in the middle, capable suppress transmission in the 1.94, 3.55 and 4.98 GHz bands. The structural parameters of FSS laminated glass were analyzed by using the equivalent circuit model. The 2 GHz frequency point will move forward with the increase of the radius of the ring. After the tripole is hollowed out to become a three-level sub-slit, two stop bands will be generated, and the length of the tripole will affect the frequency point. But the line width and the third-level sub-slot width have little effect. The extraction and calculation process of the parameters of the equivalent circuit components was introduced. The transmission response of the FSS structure was simulated by using electromagnetic simulation software, and the influence of the geometric parameters of the structure and the incident angle on the transmission characteristics of the structure were analyzed. It still has a good shielding effect when the incident angle reaches 60°. The experimental samples were made by screen printing method, and the wave transmittance and light transmittance tests were carried out. The test results are in good agreement with the software simulation results, so it has good application potential in electromagnetic radiation protection, GSM shielding and WLAN isolation.

Key words: frequency selective surface, laminated glass, angular stability, triple-band, conductive silver paste, electromagnetic shielding