抄録
Frequency selective surface (FSS) based on ceramic materials is very promising due to its high temperature bearing capacity along with stealth properties for high-speed aircraft. In this paper, modified silica ceramic, which is compatible for High Temperature Co-fired Ceramic (HTCC) technology, was investigated. The flexural strength of the Li2O–K2O–Al2O3 doped silica ceramic reaches 163.65 MPa at a sintering temperature of 1325°C, which greatly surpasses that of conventional fused silica. The maximum density of the ceramic is 2.113 g/cm3. The dielectric constant is 4.37 and the dissipation factor is 0.0038 at 14 GHz. Based on the modified silica ceramic, a Jerusalem element FSS was designed and optimized. Results show that the Jerusalem element FSS owes its advantages to high transmission coefficient, appropriate bandwidth, flat pass band and stability with different polarizations.
