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US 2002/0118080 A1Published application
Filter apparatus, duplexer, and communication apparatus
AssigneeMurata Manufacturing Co., Ltd.
InventorsKenji Saito, Hiroki Wakamatsu
Life of this patent
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Abstract
A dual-mode resonator including a conductive cavity that houses a conductive bar and a dielectric core through which the conductive bar is inserted duplexes and couples a TEM mode generated by the cavity and the conductive bar, and a TM mode generated by the cavity and the dielectric core. A TEM single-mode resonator is formed of a cavity body and a conductive bar. The dual-mode resonator and the TEM single-mode resonator form a filter apparatus.
Claims5
A filter apparatus comprising:
- a dual-mode resonator including a conductive cavity that houses a conductive bar having at least one end electrically connected to the cavity and a dielectric core through which the bar is inserted, wherein said dual-mode resonator duplexes and couples a TEM mode generated by the cavity and the bar and a TM mode generated by the cavity and the dielectric core;
- and
- a TEM single-mode resonator including a conductive cavity which houses a conductive bar having at least one end electrically connected to said cavity.
Dependencies are inferred from the claim text.