Dielectric filter for use in a microwave integrated circuit
AssigneeMurata Manufacturing Co., Ltd.
InventorsToshio Nishikawa, Tadahiro Yorita
Life of this patent
Estimating the term…
Abstract
A dielectric filter for use in a microwave integrated circuit includes a substrate made of ceramics and a plurality of dielectric resonators mounted on the substrate. The substrate has a ground electrode, input and output strip lines, and a plurality of capacitance electrodes. The dielectric resonator has a body made of a dielectric material with a through hole formed therein, an inner electrode deposited on the wall defining the through hole, and an outer electrode deposited on an outer surface of the body. The inner electrode is electrically connected to the capacitance electrode, and the outer electrode is electrically connected to the ground electrode.
Claims14
A microwave integrated circuit including a dielectric filter, comprising:
- a microwave integrated circuit substrate made of a dielectric material and having a microwave integrated circuit on at least one side of said substrate and which is complete except for a filter means;
- input and output strip lines deposited on said substrate and extending from said microwave integrated circuit and having ends in spaced opposed relation along said substrate;
- a ground electrode depositioned on the other side of said substrate opposite the space between the ends of said strip lines;
- and
- wherein said dielectric filter comprises
- at least one capacitance electrode deposited on said one side of said substrate between said input and output strip lines and being capacitively connected thereto;
- and
- at least one dielectric resonator mounted on said substrate, said dielectric resonator having a body made of a dielectric material with a hole therein, an inner electrode deposited on the inner surface of said body defining said hole, and an outer electrode deposited on the outer surface of said body, said inner electrode being electrically connected to said capacitance electrode and said outer electrode being electrically connected to said ground electrode.
Dependencies are inferred from the claim text.