High frequency dielectric ceramic composition and manufacturing method thereof, high frequency dielectric ceramic and manufacturing method thereof, and high frequency circuit element using the same

摘要

There is provided a dielectric ceramic composition for high-frequency use represented by a composition formula of a(Sn,Ti)O 2 -bMg 2 SiO 4 -cMgTi 2 O 5 -dMgSiO 3 . In the composition formula, a, b, c and d (provided that a, b, c and d are mol%) are within the following ranges: 4‰¤a‰¤37, 34‰¤b‰¤92, 2‰¤c‰¤15 and 2‰¤d‰¤15, respectively, and a+b+c+d=100. The dielectric ceramic composition for high-frequency use has a relative permittivity µ r of 7.5-12.0, a Q m ×f o value of not less than 50000 (GHz) and an absolute value of a temperature coefficient Ä f of resonance frequency f o of not more than 30 ppm/°C.