Wave transmission lines and networks – Long lines – Waveguide type
Reexamination Certificate
2005-03-08
2005-03-08
Lam, Cathy (Department: 1775)
Wave transmission lines and networks
Long lines
Waveguide type
C333S248000
Reexamination Certificate
active
06864764
ABSTRACT:
An object of the invention is to provide a dielectric porcelain composition with low rate of phase change of a cordierite phase as a primary crystal phase, in which as a result of the low rate of phase change the dielectric constant is from 4.5 to 6 and Q value is 1,000 or more at 60 GHz, and to provide a dielectric resonator and nonradiative dielectric strip using the same. The dielectric porcelain composition comprises, as a principal component, a complex oxide having a molar composition xMgO·yAl2O3·zSiO2(wherein 10≦x≦40, 10≦y≦40, 20≦z≦80, and x+y+z=100), and a ratio of a (241) peak intensity βp(241) and a (222) peak intensity βp(222) of X-ray diffraction of a β phase of a 2MgO·2Al2O3·5SiO2phase, which is a primary crystalline phase of the complex oxide, is 0.8≦βp(241)/βp(222)≦1.3.
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Hogan & Hartson LLP
Kyocera Corporation
Lam Cathy
LandOfFree
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