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AssigneeMurata Manufacturing Co., Ltd.
InventorsTsutomu Tatekawa, Yuji Kintaka, Hiroshi Tamura, Akio Oota
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A compact dielectric resonator of high Qu, in which an electrode formed of an oxide superconducting material is provided on a surface of the dielectric so as to serve as an electrode. A dielectric filter, dielectric duplexer and a communications device, in which the compact resonator is incorporated, are also provided. The dielectric which constitutes the dielectric resonator of the present invention is preferably a Ba(Mg, Ma)03-based dielectric (wherein Ma is at least one pentavalent elemental metal but cannot be Ta alone), and the oxide superconducting electrode is formed of an oxide superconducting material selected from among a RE—M—Cu—O-based oxide superconducting material (wherein RE is a rare earth element and M is an alkaline earth metal element), a Bi—Sr—Ca—Cu—O-based oxide superconducting material (which encompasses those in which Bi is partially substituted by Pb), and a Tl—Ba—Ca—Cu—O-based oxide superconducting material.
A dielectric resonator comprising a dielectric and an oxide superconducting thick film electrode on a surface of the dielectric, wherein the dielectric is a Ba(Mg, Ma)O3 dielectric in which Ma is at least one pentavalent metal or the combination of Ta and a tetravalent metal but does not represent Ta alone, and the oxide superconducting electrode is an oxide superconducting material selected from the group consisting of a RE—M—Cu—O oxide superconducting material in which RE is a rare earth element and M is an alkaline earth metal element, an A—Sr—Ca—Cu—O oxide superconducting material in which A is Bi or the combination of Bi and Pb, and a Tl—Ba—Ca—Cu—O oxide superconducting material.
A dielectric filter comprising a dielectric resonator including a dielectric and an oxide superconducting thick film electrode on a surface of the dielectric,
A dielectric filter comprising a dielectric resonator including a dielectric and an oxide superconducting thick film electrode on a surface of the dielectric,
A dielectric filter comprising a dielectric resonator including a dielectric and an oxide superconducting thick film electrode on a surface of the dielectric,
Dependencies are inferred from the claim text.