Abstract

With the advent of ubiquitous age, the high quality dielectric materials have been required for the wireless communications available to the millimeter-wave as well as microwave frequencies. The utilizable region for the frequency has been expanding to the millimeter-wave region because of the shortage of radio frequency (RF) resources. These high frequencies would be expected for ultra high speed LAN, ETS and car anti-collision system on the intelligent transport system (ITS) and so on. Silicates are good candidates for microwave/millimeterwave dielectrics, because of their low dielectric constant e r and high quality factor (High Q). Forsterite (Mg₂SiO₄) is one of the silicates with low e r of 6.8 and Qㆍf of 240000 ㎓. In this paper, we reviewed following three categories for synthesis of forsterite: (1) Synthesis of high Qㆍforsterite (2) Adjust the temperature coefficient of resonant frequency TC f (3) Diffusion of SiO₄- and Mg-ions on the formation of forsterite

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