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US 2003/0112094 A1Published application
Surface acoustic wave duplexer and portable communication device using the same
AssigneeOki Electric Industry Co., Ltd.
InventorsHisanori Ehara, Kazushige Noguchi, Satoshi Terada, Tomokazu Komazaki
Life of this patent
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Abstract
A surface acoustic wave duplexer includes a piezoelectric substrate; a transmitting filter formed on the piezoelectric substrate; a receiving filter formed on the piezoelectric substrate; a transmitting (Tx) branching line formed on the piezoelectric substrate; and a receiving (Rx) branching line formed on the piezoelectric substrate.
Claims12
A surface acoustic wave duplexer, comprising:
- a piezoelectric substrate;
- a transmitting filter formed on the piezoelectric substrate;
- a receiving filter formed on the piezoelectric substrate;
- a transmitting (Tx) branching line formed on the piezoelectric substrate;
- and
- a receiving (Rx) branching line formed on the piezoelectric substrate.
3 more elements
A portable communication device, comprising:
- an antenna;
- a power amplifier;
- and
- a surface acoustic wave duplexer, wherein
- the surface acoustic wave duplexer comprises:
- (1) a piezoelectric substrate;
- (2) a transmitting filter which is formed on the piezoelectric substrate and is connected to the power amplifier;
- (3) a receiving filter which is formed on the piezoelectric substrate;
- (4) a transmitting (Tx) branching line which is formed on the piezoelectric substrate and is connected between the antenna and transmitting filter;
- and
- (5) a receiving (Rx) branching line which is formed on the piezoelectric substrate and is connected between the antenna and receiving filter.
8 more elements
Dependencies are inferred from the claim text.