Effect of temperature shock on transmission properties of frequency selective surfaces
Zhang Chaofa1, Li Huanxi1,Lü Mingyun2*
1. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
2. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
Temperature shock test followed the criterion of GJB 150-86 was completed for frequency selective surfaces (FSS) of different coatings and different machining process. The stability of transmission properties of FSS under temperature shock test was studied by the difference before and after the test on resonant frequency, transmission loss, band width and sensitivities to the varying angles of incidence of FSS. The results are shown as follows. It has great influence of temperature shock test on the transmission properties of FSS, which mainly displays in two sides, transmission loss and band width. After the temperature shock test, transmission loss of FSS increases by 50%~300% for different coating and machining process FSS and the increase extent becomes greater with the increase of the incidence angle. The band width increases by 50%~70% for different FSS. The temperature shock has little effect on the resonant frequency and sensitivities to the varying angles of incidence and it has different influence for different FSS. In contrast with simple cell FSS, the transmission properties of compound cell FSS have more obviously change after temperature shock.