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US 2001/0043129 A1Published application
Resonator, filter, duplexer, and communication device
AssigneeMurata Manufacturing Co., Ltd.
InventorsSeiji Hidaka, Michiaki Ota, Shin Abe
Life of this patent
Estimating the term…
Abstract
A resonator includes a hollow dielectric element having a hole therein, a helical line unit including a plurality of helical lines formed in the hole, and a ground electrode formed on an outer surface of the dielectric element.
Claims23
A resonator comprising:
- a hollow dielectric element having a hole therein;
- a helical line unit including a plurality of helical lines formed in the hole;
- and
- a ground electrode formed on an outer surface of the dielectric element.
1 more element
A resonator comprising:
- a cylindrical base comprising one of an insulating material, a magnetic material, and a dielectric material;
- and
- a helical line unit including a plurality of helical lines formed on a lateral face of the cylindrical base.
A filter comprising:
- a dielectric element having a plurality of holes having different axes and being arranged substantially in parallel to each other;
- a plurality of resonators formed respectively in said plurality of holes by a corresponding plurality of helical line units formed in the holes, each helical line unit including a plurality of helical lines;
- and
- a ground electrode formed on an outer surface of the dielectric element;
- and
- input/output electrodes coupled to predetermined resonators of said plurality of resonators.
3 more elements
A filter comprising:
- a conductive cavity;
- a plurality of resonators arranged in said conductive cavity substantially in parallel to each other and having different axes;
- each resonator comprising a helical line unit formed on a lateral face of a corresponding cylindrical base, each helical line unit including a plurality of helical lines;
- and
- input/output electrodes coupled to predetermined resonators of said plurality of resonators.
2 more elements
A filter comprising:
- a dielectric element having a hole therein;
- a plurality of resonators formed in said hole by a corresponding plurality of helical line units coaxially formed in the hole, each helical line unit including a plurality of helical lines;
- a ground electrode formed on an outer surface of the dielectric element;
- and
- input/output electrodes coupled to predetermined resonators of said plurality of resonators.
2 more elements
A filter comprising:
- a conductive cavity;
- a plurality of resonators coaxially arranged in said conductive cavity, each comprising a corresponding helical line unit formed on a lateral face of a cylindrical base, each helical line unit including a plurality of helical lines;
- and
- input/output electrodes coupled to predetermined resonators of said plurality of resonators.
1 more element
Dependencies are inferred from the claim text.