Filter device and radio frequency module
AssigneeMurata Manufacturing Co., Ltd.
InventorTeruaki OSHITA
Life of this patent
Estimating the term…
Abstract
A duplexer included in a radio frequency module is used in a communication band in which the transmit band in a single communication band includes a first transmit band and a second transmit band overlapping each other and in which the receive band in the single communication band includes a first receive band and a second receive band overlapping each other. A transmit filter unit in the duplexer uses, as a pass band, a fixed frequency band including the first transmit band and the second transmit band. A receive filter unit of the duplexer uses, as a pass band, a fixed frequency band including the first receive band and the second receive band.
Claims20
A filter device used in a single communication band, the single communication band having a first band and a second band, the first band and the second band overlapping each other within the single communication band, the filter device comprising:
- a single input terminal;
- and
- a single output terminal,
- wherein a pass band of the filter device is a fixed frequency band including the first band and the second band.
A filter device used in a single communication band, a transmit band in the single communication band including a first transmit band and a second transmit band, a receive band in the single communication band including a first receive band and a second receive band, the first transmit band and the second transmit band overlapping each other, and the first receive band and the second receive band overlapping each other, the filter device comprising:
- an input/output terminal;
- a transmit-signal input terminal;
- a receive-signal output terminal;
- a transmit filter that is disposed between the transmit-signal input terminal and the input/output terminal, wherein a pass band of the transmit filter is a fixed frequency band including the first transmit band and the second transmit band;
- and
- a receive filter that is disposed between the receive-signal output terminal and the input/output terminal, wherein a pass band of the receive filter is a fixed frequency band including the first receive band and the second receive band.
Dependencies are inferred from the claim text.