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:
Nov. 24, 1998
Filed:
Aug. 15, 1997
Applicant:
Inventors:
Kyung Yong Kim, Seoul, KR;
Whan Choi, Choongcheongbuk-Do, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
L04B / ;
U.S. Cl.
CPC ...
501136 ;
Abstract
The present invention relates to a dielectric material for a microwave of a CaTiO.sub.3 -La(Mg.sub.1/2 Ti.sub.1/2)O.sub.3 -LaAlO.sub.3 group. The dielectric material for a microwave according to the present invention includes a composition condition of 0.3.ltoreq.x.ltoreq.0.6 and 0.ltoreq.y.ltoreq.1.0 wherein (1-x)CaTiO.sub.3 -x�(1-y)La(Mg.sub.1/2 Ti.sub.1/2)O.sub.3 -yLaAlO.sub.3 !. The high frequency dielectric material includes an dielectric constant of above 40, a low dielectric loss, and a temperature coefficient of a resonant frequency which is easily variable from a positive (+) value to a negative (-) value with respect to the value of 0 ppm/.degree.C.