Radio-frequency front-end circuit and communication device
A radio-frequency front-end circuit includes a first switch and a first transfer circuit that transfers a first radio-frequency signal. The first switch includes a first antenna terminal connected to a first antenna, a second antenna terminal connected to a second antenna, and first and second selection terminals. The first selection terminal is connected to the first transfer circuit, and the second selection terminal connected to a second transfer circuit. The second transfer circuit transfers the second radio-frequency signal. Selection between conduction of the first antenna terminal with the first selection terminal and conduction of the first antenna terminal with the second selection terminal is exclusively carried out in the first switch. Selection between conduction of the second antenna terminal with the first selection terminal and conduction of the second antenna terminal with the second selection terminal is exclusively carried out in the first switch.
1. A radio-frequency front-end circuit configured to simultaneously transfer a first radio-frequency signal of a first communication system and a second radio-frequency signal of a second communication system, the second communication system being different than the first communication system, the radio-frequency front-end circuit comprising:
a first transfer circuit configured to transfer the first radio-frequency signal;
a second transfer circuit;
a first switch comprising a first antenna terminal connected to a first antenna, a second antenna terminal connected to a second antenna, a first selection terminal connected to a first transfer circuit, and a second selection terminal connected to the second transfer circuit;
a first reception circuit configured to transfer a first reception signal of the first communication system;
a second reception circuit configured to transfer a second reception signal of the second communication system; and
a second switch comprising a third antenna terminal connected to a third antenna, a fourth antenna terminal connected to a fourth antenna, and at least two selection terminals,
wherein the second antenna is different than the first antenna, and the fourth antenna is different than the third antenna,
wherein the first switch is configured to:
exclusively switch between conduction of the first antenna terminal with the first selection terminal and conduction of the first antenna terminal with the second selection terminal, and
exclusively switch between conduction of the second antenna terminal with the first selection terminal and conduction of the second antenna terminal with the second selection terminal,
such that the first and second selection terminals are in conduction with different ones of the first and second antenna terminals,
wherein the first transfer circuit comprises a first low-noise amplifier configured to amplify the first radio-frequency signal, the first radio-frequency signal being received from the first antenna or the second antenna,
wherein the second transfer circuit comprises a second low-noise amplifier configured to amplify the second radio-frequency signal, the second radio-frequency signal being received from the first antenna or the second antenna, and
wherein the at least two selection terminals of the second switch comprise a third selection terminal connected to the first reception circuit, and a fourth selection terminal connected to the second reception circuit.
2. The radio-frequency front-end circuit according to claim 1 , wherein:
the second radio-frequency signal includes user data of the second communication system, and
the first radio-frequency signal includes communication control data for enabling transfer of the user data of the second communication system via the second transfer circuit.
3. The radio-frequency front-end circuit according to claim 1 , wherein:
the first transfer circuit comprises a first power amplifier configured to amplify the first radio-frequency signal, and to output a first amplified radio-frequency signal, the first amplified radio-frequency signal being transmitted by the first antenna or the second antenna, and
the second transfer circuit comprises a second power amplifier configured to amplify the second radio-frequency signal, and to output a second amplified radio-frequency signal, the second amplified radio-frequency signal being transmitted by the first antenna or the second antenna.
4. The radio-frequency front-end circuit according to claim 3 , further comprising:
a third transfer circuit configured to transfer a third radio-frequency signal of a third communication system, wherein:
the at least two selection terminals of the first switch comprises a fifth selection terminal connected to the third transfer circuit,
the third radio-frequency signal includes user data of the third communication system, and
the first switch further comprises a fifth antenna terminal connected to a fifth antenna, the fifth antenna being different from the first antenna and the second antenna.
5. The radio-frequency front-end circuit according to claim 4 , wherein:
the third communication system is the same as the first communication system,
the first radio-frequency signal is of a first communication band stipulated in the first communication system, and
the third radio-frequency signal is of a third communication band stipulated in the first communication system, the third communication band being different than the first communication band.
6. The radio-frequency front-end circuit according to claim 1 , wherein:
the first communication system is a fourth generation communication system (4G), and
the second communication system is a fifth generation communication system (5G).
7. The radio-frequency front-end circuit according to claim 6 , wherein:
the first radio-frequency signal is a signal of a first communication band stipulated in the 4G communication system, and
the second radio-frequency signal is a signal of a second communication band that is stipulated in the 5G communication system and that has a frequency range identical to a frequency range of the first communication band.
8. A communication device, comprising:
the radio-frequency front-end circuit according to claim 1 ;
the first antenna and the second antenna; and
a radio-frequency (RF) signal processing circuit configured to process the first radio-frequency signal or the second radio-frequency signal transmitted or received by the first antenna or the second antenna,
wherein the radio frequency front-end circuit is configured to transfer the first and second radio-frequency signals between the first antenna, the second antenna, and the RF signal processing circuit.
9. A radio-frequency front-end circuit configured to simultaneously transfer a first radio-frequency signal of a first communication system and a second radio-frequency signal of a second communication system, the second communication system being different than the first communication system, the radio-frequency front-end circuit comprising:
a first transfer circuit configured to transfer the first radio-frequency signal; and
a first switch comprising a first antenna terminal connected to a first antenna, a second antenna terminal connected to a second antenna, a first selection terminal connected to a first transfer circuit, and a second selection terminal connected to a second transfer circuit,
wherein the second antenna is different than the first antenna,
wherein the first switch is configured to:
exclusively switch between conduction of the first antenna terminal with the first selection terminal and conduction of the first antenna terminal with the second selection terminal, and
exclusively switch between conduction of the second antenna terminal with the first selection terminal and conduction of the second antenna terminal with the second selection terminal,
such that the first and second selection terminals are in conduction with different ones of the first and second antenna terminals,
wherein the second radio-frequency signal includes user data of the second communication system, and
wherein the first radio-frequency signal includes communication control data for enabling transfer of the user data of the second communication system via the second transfer circuit.