US 6,556,101 B1 · Dielectric resonator, dielectric filter, dielectric duplexer, and communication device

Abstract

A small-sized low-loss dielectric resonator, dielectric filter, and dielectric duplexer, and a communication device using such an element. Through-holes are formed in a dielectric block. The inner surface of each through-hole is covered with a thin-film multilayer electrode consisting of an outermost conductive layer and a multilayer region including thin-film conductive layers and thin-film dielectric layers. An outer conductor having a similar thin-film multilayer electrode structure is formed on the outer surface of the dielectric block. An outer conductor in the form of a single-layer electrode is formed on a short-circuited end face of the dielectric block thereby connecting together the thin-film conductive layers of the inner and outer conductors.

Claims12

Dependent claims

A TEM mode dielectric resonator comprising:

a dielectric block;
an inner conductor formed on the inner surface of a through-hole extending from one end face to the opposite end face of said dielectric block;
and
an outer conductor formed on the outer surface of said dielectric block, wherein
at least a part of at least one of said inner conductor and said outer conductor has a thin-film multilayer electrode structure formed by alternately disposing thin-film conductive layers each having a thickness smaller than the skin depth at an operating frequency and thin-film dielectric layers, the thickness of the each thin-film dielectric layer is such that the phase velocity of TEM waves propagating through the dielectric block and the thin film dielectric layers all are substantially equal.

2 more elements

A TEM mode dielectric filter comprising:

a dielectric block;
an inner conductor formed on the inner surface of a through-hole extending from one end face to the opposite end face of said dielectric block;
and
an outer conductor formed on the outer surface of said dielectric block, wherein
at least a part of at least one of said inner conductor and said outer conductor has a thin-film multilayer electrode structure formed by alternately disposing thin-film conductive layers each having a thickness smaller than the skin depth at an operating frequency and thin-film dielectric layers, the thickness of the each thin-film dielectric layer is such that the phase velocity of TEM waves propagating through the dielectric block and the thin film dielectric layers all are substantially equal;
and
external terminals coupled to said inner conductor for serving as high-frequency signal input/output terminals disposed on the outer surface of said dielectric block.

4 more elements

A TEM mode dielectric filter comprising:

a dielectric block;
a plurality of resonators each comprising an inner conductor formed on the inner surface of a through-hole extending from one end face to the opposite end face of said dielectric block;
and
an outer conductor formed on the outer surface of said dielectric block, wherein
at least a part of at least one of said inner conductor and said outer conductor has a thin-film multilayer electrode structure formed by alternately disposing thin-film conductive layers each having a thickness smaller than the skin depth at an operating frequency and thin-film dielectric layers, the thickness of the each thin-film dielectric layer is such that the phase velocity of TEM waves propagating through the dielectric block and the thin film dielectric layers all are substantially equal;
and
external terminals each coupled to a respective one of said inner conductors for serving as input/output terminals disposed on the outer surface of said dielectric block.

4 more elements

Dependencies are inferred from the claim text.

Dielectric resonator, dielectric filter, dielectric duplexer, and communication device

Life of this patent

Dielectric resonator, dielectric filter, dielectric duplexer, and communication device

Life of this patent

Abstract

Claims12