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US 7,446,629 B2Granted
Antenna duplexer, and RF module and communication apparatus using the same
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHiroyuki Nakamura, Keiji Onishi, Tomohiro Iwasaki
Life of this patent
Estimating the term…
Abstract
One of plurality of transmission terminals connected to a transmission filter and a receiving terminal connected to a receiving filter is a balanced type terminal, and another is an unbalanced type terminal. The transmission filter and the receiving filter includes surface acoustic wave resonators or film bulk acoustic resonators. The balanced type terminal is connected to a longitudinal mode coupled surface acoustic wave filter.
Claims23
An antenna duplexer comprising:
- an antenna terminal;
- a transmission terminal;
- a receiving terminal;
- a transmission filter connected between the antenna terminal and the transmission terminal;
- and
- a receiving filter connected between the antenna terminal and the receiving terminal, wherein:
- one of the transmission terminal and the receiving terminal is a balanced type terminal, and another of the transmission terminal and the receiving terminal is an unbalanced type terminal;
- at least one of the transmission filter and the receiving filter includes a surface acoustic wave resonator;
- the balanced type terminal is connected to a longitudinal mode coupled surface acoustic wave filter,
- both the transmission filter and the receiving filter include a film bulk acoustic resonator serially connected to the antenna terminal and at least one of the transmission filter and the receiving filter includes a film bulk acoustic resonator connected in parallel between the antenna terminal and ground;
- and
- a number of film bulk acoustic resonators connected in parallel between the antenna terminal and ground is less than a number of film bulk acoustic resonators serially connected to the antenna terminal.
9 more elements
An RF module comprising:
- an antenna duplexer, and
- a semiconductor device, wherein:
- the antenna duplexer and the semiconductor device are mounted on a single mounted subtrate;
- and
- the antenna duplexer includes:
- an antenna terminal;
- a transmission terminal;
- a receiving terminal;
- a transmission filter connected between the antenna terminal and the transmission terminal;
- and
- a receiving filter connected between the antenna terminal and the receiving terminal;
- wherein:
- one of the transmission terminal and the receiving terminal is a balanced type terminal, and another of the transmission terminal and the receiving terminal is an unbalanced type terminal;
- at least one of the transmission filter and the receiving filter includes a surface acoustic wave resonator;
- the balance type terminal is connected to a longitudinal mode coupled surface acoustic wave filter;
- both the transmission filter and the receiving filter include a film bulk acoustic resonator serially connected to the antenna terminal and at least one of the transmission filter and the receiving filter includes a film bulk acoustic resonator connected in parallel between the antenna terminal and ground;
- and
- a number of film bulk acoustic resonators connected in parallel between the antenna terminal and ground is less than a number of a film bulk acoustic resonators serially connected to the antenna terminal.
15 more elements
A communication apparatus including an antenna duplexer, wherein the antenna duplexer includes:
- an antenna terminal;
- a transmission terminal;
- a receiving terminal;
- a transmission filter connected between the antenna terminal and the transmission terminal;
- and
- a receiving filter connected between the antenna terminal and the receiving terminal, wherein:
- one of the transmission terminal and the receiving terminal is a balanced type terminal, and another of the transmission terminal and the receiving is an unbalanced type terminal;
- at least one of the transmission filter and the receiving filter includes a surface acoustic wave resonator;
- the balanced type terminal is connected to a longitudinal mode coupled surface acoustic wave filter;
- both the transmission filter and the receiving filter include a film bulk acoustic resonator serially connected to the antenna terminal and at least one of the transmission filter and the receiving filter includes a film bulk acoustic resonator connected in parallel between the antenna terminal and ground;
- and
- a number of film bulk acoustic resonators connected in parallel between the antenna terminal and ground is less than a number of film bulk acoustic resonators serially connected to the antenna terminal.
9 more elements
Dependencies are inferred from the claim text.