The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 2006
Filed:
Mar. 24, 2003
Takashi Oba, Ise, JP;
Hisashi Koduka, Bisai, JP;
Kazuhisa Itakura, Komaki, JP;
NKG Spark Plug Co., Ltd., Nagoya, JP;
Abstract
A dielectric ceramic composition is provided which exhibits a high unloaded quality factor (Q) and permits regulation of the relative dielectric constant (ε) and the temperature coefficient (τ) of resonance frequency (f) within specific ranges in accordance with use or application of the composition. A dielectric resonator is also provided which includes a resonator main body formed from the composition. The dielectric ceramic composition contains, as metallic components, Ba, Zn, Nb, Ta, and Sb, and the amounts of the metallic components, as reduced to their oxides, satisfy the following relations expressed in mol %: 57.5≦BaO≦62.6; 16.0≦ZnO≦22.2; 0<NbO≦20.6; 0<TaO≦20.6; and 0<SbO≦5.9.