Patent ID: 6249194
Filing Date: 2001-06-19
Classification: H03H

Abstract:
A composite filter, comprising:a laminated body comprising a dielectric layer and an electric conductor layer laminated together;a concave portion provided on at least one major surface of said laminated body;external terminals provided on at least a side surface of said laminated body;an LC filter comprising an inductance element and a capacitance element which are formed by respective parts of said electric conductor layer of said laminated body;a surface acoustic wave (SAW) filter arranged in said concave portion of said laminated body;a cover sealing said concave portion;two of said external terminals constituting input terminals of said surface acoustic wave filter and of said LC filter respectively, and another two of said external terminals constituting output terminals of said surface acoustic wave filter and of said LC filter respectively; andsaid surface acoustic wave filter and said LC filter being electrically independent and not electrically connected to each other within said laminated body.