Radio frequency circuit, multiplexer, and communication device
AssigneeMurata Manufacturing Co., Ltd.
InventorHirotsugu Mori
Life of this patent
Estimating the term…
Abstract
A radio frequency circuit includes: an antenna connection terminal; a UHB transfer circuit that transfers a signal of a first frequency band including at least a part of a frequency band higher than or equal to 3.3 GHz and under 5 GHz; a NR-U transfer circuit that transfers a signal of a second frequency band including at least a part of a frequency band higher than or equal to 6.6 GHz; and a filter having a frequency band including the first frequency band and the second frequency band as a passband. The filter is disposed between the antenna connection terminal and a connection node of the UHB transfer circuit and the NR-U transfer circuit.
Claims12
A radio frequency circuit, comprising:
- an input/output terminal;
- a first transfer circuit configured to transfer a signal of a first frequency band, the first frequency band including at least a part of a frequency band higher than or equal to 3.3 GHz and under 5 GHz;
- a second transfer circuit configured to transfer a signal of a second frequency band, the second frequency band including at least a part of a frequency band higher than or equal to 6.6 GHz;
- and
- a first filter having, as a passband, a frequency band including the first frequency band and the second frequency band,
- wherein the first filter is disposed between the input/output terminal and a connection node of the first transfer circuit and the second transfer circuit.
A multiplexer, comprising:
- a common terminal;
- a first terminal;
- a second terminal;
- a first filter connected between the common terminal and the first terminal, and having a frequency band including a first frequency band and a second frequency band as a passband, the first frequency band including at least a part of a frequency band higher than or equal to 3.3 GHz and under 5 GHz, the second frequency band including at least a part of a frequency band higher than or equal to 6.6 GHz;
- and
- a second filter connected between the common terminal and the second terminal, and having a frequency band including a third frequency band as a passband and having the first frequency band and the second frequency band as an attenuation band, the third frequency band including at least a part of a frequency band higher than or equal to 1.7 GHz and lower than or equal to 2.7 GHz,
- wherein the first filter includes a stacked structure of a plurality of dielectric layers,
- a first region of a first dielectric layer included in the plurality of dielectric layers includes an electrode pattern of a series-arm path and an LC series resonance circuit,
- a second region of a second dielectric layer that is included in the plurality of dielectric layers and adjacent to the first dielectric layer is void of a ground electrode pattern, the second region overlapping the first region in a plan view of the second dielectric layer,
- the second filter includes:
- a first inductor in a form of a spiral conductive coil;
- and
- a second inductor in a form of a non-spiral conductive line,
- the attenuation band of the second filter includes a frequency that is two times a predetermined frequency and a frequency that is three times the predetermined frequency, the predetermined frequency being included in the third frequency band,
- the first inductor forms a first attenuation pole at the frequency that is two times the predetermined frequency, and
- the second inductor forms a second attenuation pole at the frequency that is three times the predetermined frequency.
Dependencies are inferred from the claim text.