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US 6,784,759 B2Granted
Antenna duplexer and communication apparatus
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsTomoya Maekawa, Hiroyuki Nakamura, Toru Yamada, Toshio Ishizaki
Life of this patent
Estimating the term…
Abstract
An antenna duplexer has a receiving filter having a surface acoustic wave device; a transmitting filter having a dielectric resonator; and a matching circuit for matching the receiving filter and the transmitting filter with an antenna respectively, wherein the transmitting filter, receiving filter, and matching circuit are integrated with each other.
Claims28
An antenna duplexer comprising:
- a receiving filter having a surface acoustic wave device;
- a transmitting filter having a dielectric mulitilayer filter;
- and
- a matching circuit for matching said receiving filter and said transmitting filter with an antenna respectively,
- wherein said transmitting filter, receiving filter, and matching circuit are integrated with each other, and
- said matching circuit has a dielectric multilayer structure.
3 more elements
An antenna duplexer comprising:
- a receiving filter having a surface acoustic wave device;
- a transmitting filter having a dielectric multilayer filter;
- and
- a matching circuit for matching said receiving filter and said transmitting filter with an antenna respectively,
- wherein said transmitting filter, receiving filter, and matching circuit are integrated with each other, and
- said matching circuit has a first stripline;
- and
- said receiving filter is connected to said first stripline through a via and is connected only through a dielectric by electromagnetic coupling to a second stripline leading from said antenna, and
- said dielectric separates said first and second striplines.
6 more elements
An antenna duplexer comprising:
- a receiving filter having a surface acoustic wave device;
- a transmitting filter having a dielectric multilayer filter;
- and
- a matching circuit for matching said receiving filter and said transmitting filter with an antenna respectively,
- wherein said transmitting filter, receiving filter, and matching circuit are integrated with each other, and
- said matching circuit has a first stripline;
- and
- said transmitting filter is connected to said first stripline through a via and is connected only through a electromagnetic coupling to second stripline leading from said antenna, and
- said dielectric separates said first and second striplines.
6 more elements
An antenna duplexer comprising:
- a receiving filter having a composite structure of a filter having a surface acoustic wave device and a filter having a dielectric coaxial resonator;
- a transmitting filter having a filter with a dielectric multilayer filter;
- and
- a matching circuit for matching said receiving filter and said transmitting filter with an antenna,
- wherein said receiving filter, transmitting filter, and matching filter are integrated with each other, and
- said matching circuit has a dielectric multilayer structure.
3 more elements
An antenna duplexer comprising:
- a receiving filter having a surface acoustic wave device;
- a transmitting filter having a dielectric multilayer filter;
- and
- a matching circuit for matching said receiving filter and said transmitting filter with an antenna respectively,
- wherein said transmitting filter, receiving filter, and matching circuit are integrated with each other, and
- said transmitting filter and said matching circuit are integrated as a dielectric multilayer structure, and
- a dielectric constant of a dielectric material forming said transmitting filter is different from a dielectric constant of a dielectric material forming said matching circuit.
4 more elements
An antenna duplexer comprising:
- a receiving filter having a surface acoustic wave device;
- a transmitting filter having a dielectric multilayer filter;
- and
- a matching circuit for matching said receiving filter and said transmitting filter with an antenna respectively,
- wherein said transmitting filter, receiving filter, and matching circuit are integrated with each other,
- said transmitting filter and said matching circuit are integrated as a dielectric multilayer structure,
- a layer is formed of the same material as the dielectric material forming said matching circuit, and
- said transmitting filter is sandwiched between said matching circuit and said layer to form one integrated multilayer structure.
5 more elements
Dependencies are inferred from the claim text.