Receiving filter, multiplexer, and communication apparatus
AssigneeKYOCERA Corporation
InventorTomonori Urata
Life of this patent
Estimating the term…
Abstract
A receiving filter includes a reception terminal which outputs reception signals from an antenna terminal, a second DMS filter configured by a longitudinally coupled double-mode type acoustic wave filter which is located in a signal path from the antenna terminal to the reception terminal, a fourth GND terminal given a reference potential, and a fourth GND wiring connected to the fourth GND terminal and to the second DMS filter. A reception terminal conductor configured by the reception terminal and the reception terminal wiring connected to the reception terminal and A fourth GND conductor configured by the fourth GND terminal and the fourth GND wiring are adjacent and are capacity-coupled with respect to each other.
Claims24
A receiving filter comprising
- an antenna terminal,
- a reception terminal outputting signals from the antenna terminal,
- a reception terminal wiring connected to the reception terminal,
- a first filter of a longitudinally coupled double-mode type acoustic wave filter located in a signal path from the antenna terminal to the reception terminal,
- a first reference potential terminal given a reference potential, and
- a first reference potential wiring connected to the first reference potential terminal and to the first filter, wherein
- a reception terminal conductor comprising the reception terminal and the reception terminal wiring and a first reference potential conductor comprising the first reference potential terminal and the first reference potential wiring are adjacent and capacitively coupled with respect to each other, further comprising
- a piezoelectric substrate in which the antenna terminal, the reception terminal conductor, the first reference potential conductor, and the first filter are located on one surface, and
- in a plan view of the surface, the first reference potential conductor extending so as to surround the reception terminal conductor together with the first filter.
A receiving filter comprising
- an antenna terminal,
- a reception terminal outputting signals from the antenna terminal,
- a reception terminal wiring connected to the reception terminal,
- a first filter of a longitudinally coupled double-mode type acoustic wave filter located in a signal path from the antenna terminal to the reception terminal,
- a first reference potential terminal given a reference potential, and
- a first reference potential wiring connected to the first reference potential terminal and to the first filter, wherein
- a reception terminal conductor comprising the reception terminal and the reception terminal wiring and a first reference potential conductor comprising the first reference potential terminal and the first reference potential wiring are adjacent and capacitively coupled with respect to each other, and
- wherein a distance between the reception terminal conductor and the first reference potential conductor is 20 μm or less.
A receiving filter comprising
- an antenna terminal,
- a reception terminal outputting signals from the antenna terminal,
- a reception terminal wiring connected to the reception terminal,
- a first filter of a longitudinally coupled double-mode type acoustic wave filter located in a signal path from the antenna terminal to the reception terminal,
- a resonator between the first filter and the reception terminal,
- a first reference potential terminal given a reference potential, and
- a first reference potential wiring connected to the first reference potential terminal and to the first filter, wherein
- a reception terminal conductor comprising the reception terminal and the reception terminal wiring and a first reference potential conductor comprising the first reference potential terminal and the first reference potential wiring are adjacent and capacitively coupled with respect to each other.
Dependencies are inferred from the claim text.