Radio-frequency circuit and communication device
AssigneeMurata Manufacturing Co., Ltd.
InventorsTakanori Uejima, Kenji Tahara, Hiroyuki Nagamori, Takahiro Katamata
Life of this patent
Estimating the term…
Abstract
A radio-frequency circuit includes an antenna connection terminal, switch circuits, a duplexer, a low-pass filter, and a high-pass filter. The switch circuit includes a port connected to the antenna connection terminal and ports. The switch circuit includes a single transmission port connected to the port, a simultaneous transmission port connected to ports. The duplexer is connected to the port. The low-pass filter is disposed on a signal path connecting the port and the simultaneous transmission port. The high-pass filter is connected to the port. No filter is disposed on a signal path connecting the port and the single transmission port.
Claims17
A radio-frequency circuit comprising:
- an antenna connection terminal;
- a first switch circuit;
- a second switch circuit;
- a first filter having a passband comprising a first frequency band;
- a second filter that has a passband comprising at least the first frequency band and has a stopband comprising a second frequency band, the second frequency band including a second frequency that is n times a first frequency in the first frequency band, n being a natural number greater than or equal to two;
- and
- a third filter having a passband comprising a third frequency band, the third frequency band including the second frequency,
- wherein the first switch circuit comprises a first port connected to the antenna connection terminal, and a second port, a third port, and a fourth port that are configured to selectively connect to the first port,
- wherein the second switch circuit comprises a single transmission port connected to the second port, a simultaneous transmission port connected to the third port, and an input/output port configured to selectively connect to the single transmission port and the simultaneous transmission port,
- wherein the first filter is connected to the input/output port,
- wherein the second filter is in a first signal path that connects the third port and the simultaneous transmission port,
- wherein the third filter is connected to the fourth port, and
- wherein no filter is in a second signal path that connects the second port and the single transmission port.
Dependencies are inferred from the claim text.