Radio frequency circuit and communication device

A radio frequency circuit capable of simultaneously transmitting an LTE (Long Term Evolution) signal and an NR (New Radio) signal, the circuit comprising:

• a first filter, a second filter, and a third filter;
• a first power amplifier and a second power amplifier;
• and
• a first switch connected between (i) the first filter, the second filter, and the third filter and (ii) the first power amplifier and the second power amplifier;
• wherein, when one of the LTE signal and the NR signal is amplified with the first power amplifier, an other of the LTE signal and the NR signal is amplified with the second power amplifier,
• the first switch enables connection between the first filter and the first power amplifier, enables connection between the third filter and the second power amplifier, and enables selective connection between the second filter and one of the first power amplifier and the second power amplifier, wherein:
• regarding a first band for frequency division duplex (FDD) composed of a first downlink operating band and a first uplink operating band, a second band for FDD composed of a second downlink operating band and a second uplink operating band, and a third band,
• following bands are positioned in a following order, from a low frequency side or a high frequency side:
• the third band, the second downlink operating band, the second uplink operating band, the first uplink operating band, and the first downlink operating band;
• the first filter has a passband including the first uplink operating band;
• the second filter has a passband corresponding to the third band;
• and
• the third filter has a passband including the second uplink operating band.

A communication device comprising:

• a signal processing circuit that processes a radio frequency signal;
• and
• a radio frequency circuit, which transmits the radio frequency signal between the signal processing circuit and an antenna, the radio frequency circuit capable of simultaneously transmitting an LTE (Long Term Evolution) signal and an NR (New Radio) signal, the radio frequency circuit comprising:
• a first filter, a second filter, and a third filter;
• a first power amplifier and a second power amplifier;
• and
• a first switch connected between (i) the first filter, the second filter, and
• the third filter and (ii) the first power amplifier and the second power amplifier;
• wherein, when one of the LTE signal and the NR signal is amplified with the first power amplifier, an other of the LTE signal and the NR signal is amplified with the second power amplifier, and
• the first switch enables connection between the first filter and the first power amplifier, enables connection between the third filter and the second power amplifier, and enables selective connection between the second filter and one of the first power amplifier and the second power amplifier, wherein
• the first switch has a first common terminal, a second common terminal, a first selection terminal, a second selection terminal, and a third selection terminal, selectively switches connection between the first common terminal and the first selection terminal and connection between the first common terminal and the second selection terminal, and selectively switches connection between the second common terminal and the second selection terminal and connection between the second common terminal and the third selection terminal;
• the first common terminal is connected to an output terminal of the first power amplifier;
• the second common terminal is connected to an output terminal of the second power amplifier;
• the first selection terminal is connected to an input end of the first filter;
• the second selection terminal is connected to an input end of the second filter;
• and
• the third selection terminal is connected to an input end of the third filter.