WO2022209665A1 - Circuit haute fréquence et dispositif de communication - Google Patents

Circuit haute fréquence et dispositif de communication Download PDF

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Publication number
WO2022209665A1
WO2022209665A1 PCT/JP2022/010314 JP2022010314W WO2022209665A1 WO 2022209665 A1 WO2022209665 A1 WO 2022209665A1 JP 2022010314 W JP2022010314 W JP 2022010314W WO 2022209665 A1 WO2022209665 A1 WO 2022209665A1
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Prior art keywords
filter
terminal
band
switch
power amplifier
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PCT/JP2022/010314
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English (en)
Japanese (ja)
Inventor
農史 小野
弘嗣 森
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株式会社村田製作所
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Publication of WO2022209665A1 publication Critical patent/WO2022209665A1/fr

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38—Impedance-matching networks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/46—Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving

Definitions

  • the present invention relates to high frequency circuits and communication devices.
  • front-end circuits that support multi-band and multi-mode, it is required to transmit and receive multiple high-frequency signals with low loss and high isolation.
  • Patent Document 1 discloses a receiving module (transmission circuit) having a configuration in which a plurality of filters with different passbands are connected to an antenna via a multiplexer (switch).
  • Bands specified by 3GPP (3rd Generation Partnership Project) include, for example, the first FDD (Frequency Division Duplex) band uplink operating band or downlink operating band (hereinafter referred to as the first band), other reception-only bands Bands and frequencies may overlap.
  • FDD Frequency Division Duplex
  • a filter having the first band as the passband and a filter having the other receive-only band as the passband serves as one filter (hereinafter referred to as a first filter) from the viewpoint of miniaturization of the high frequency circuit.
  • the first filter is a reception filter for the first FDD band, it is impedance-matched on the assumption that it will be used simultaneously with the transmission filter for the first FDD band (first transmission mode). Therefore, when the first filter is used as a receive filter for the other dedicated receive band (second transmission mode), if the impedance of the transmit filter for the first FDD band is opened, the impedance of the first filter will deviate. Transmission loss may increase.
  • an object of the present invention is to provide a compact high-frequency circuit and communication device capable of transmitting high-frequency signals in a plurality of transmission modes with low loss.
  • a high-frequency circuit includes a first filter having a passband including an uplink operating band of a first band for frequency division duplexing, and a passband including a downlink operating band of the first band.
  • a second filter having a band; a third filter having a passband including at least a portion of the second band; an impedance element; a common terminal; a first terminal connected to the first filter; and a third terminal connected to a third filter, switching between conduction and non-conduction between the common terminal and the first terminal, switching between conduction and non-conduction between the common terminal and the second terminal, a first switch that switches between conduction and non-conduction between the common terminal and the third terminal; and a second switch that switches between conduction and non-conduction between the common terminal and the impedance element.
  • the third band is included in the passband, the common terminal and the first terminal are in a connected state, the common terminal and the second terminal are in a connected state, and the common terminal and the third terminal are in a non-connected state.
  • the common terminal and the impedance element are in a non-connected state, the common terminal and the first terminal are in a connected state, the common terminal and the second terminal are in a connected state, and the common terminal and the third terminal are in a connected state.
  • the common terminal and the impedance element are connected, the common terminal is connected to one of the first terminal and the second terminal, and the common terminal is not connected to the other of the first terminal and the second terminal.
  • the common terminal and the impedance element are connected.
  • the present invention it is possible to provide a compact high-frequency circuit and communication device capable of transmitting high-frequency signals in a plurality of transmission modes with low loss.
  • FIG. 1 is a circuit configuration diagram of a high-frequency circuit and a communication device according to an embodiment.
  • FIG. 2 is a diagram illustrating band combinations applied to the high-frequency circuit according to the embodiment.
  • FIG. 3A is a diagram showing a first mode circuit state of the high-frequency circuit according to the embodiment.
  • FIG. 3B is a diagram showing a second mode circuit state of the high-frequency circuit according to the embodiment.
  • FIG. 3C is a diagram showing a third mode circuit state of the high-frequency circuit according to the embodiment.
  • FIG. 4A is a diagram showing a first mode circuit state of the high-frequency circuit according to Modification 1 of the embodiment.
  • 4B is a diagram showing a second mode circuit state of the high-frequency circuit according to Modification 1 of the embodiment.
  • FIG. 1 is a circuit configuration diagram of a high-frequency circuit and a communication device according to an embodiment.
  • FIG. 2 is a diagram illustrating band combinations applied to the high-frequency circuit according to the embodiment.
  • FIG. 4C is a diagram illustrating a circuit state in a third mode of the high-frequency circuit according to Modification 1 of the embodiment
  • FIG. FIG. 5 is a diagram exemplifying band combinations applied to the high-frequency circuit according to Modification 1 of the embodiment.
  • FIG. 6A is a diagram showing a second mode circuit state of a high-frequency circuit according to Modification 2 of the embodiment.
  • FIG. 6B is a diagram showing a second mode circuit state of the high-frequency circuit according to Modification 3 of the embodiment.
  • FIG. 7 is a diagram showing a second mode circuit state of the high-frequency circuit according to Modification 4 of the embodiment.
  • FIG. 1 is a schematic diagram that has been appropriately emphasized, omitted, or adjusted in proportion to show the present invention, and is not necessarily strictly illustrated, and the actual shape, positional relationship, and ratio are different. may differ.
  • substantially the same configurations are denoted by the same reference numerals, and redundant description may be omitted or simplified.
  • connection means not only direct connection with connection terminals and/or wiring conductors, but also electrical connection via other circuit elements.
  • connected between A and B means connected to A and B on a path connecting A and B.
  • transmission path refers to a transmission line composed of a wiring through which a high-frequency transmission signal propagates, an electrode directly connected to the wiring, and a terminal directly connected to the wiring or the electrode. It means that there is
  • receiving path means a transmission line composed of a wiring through which a high-frequency received signal propagates, an electrode directly connected to the wiring, and a terminal directly connected to the wiring or the electrode. do.
  • FIG. 1 is a circuit configuration diagram of a high frequency circuit 1 and a communication device 5 according to the first embodiment.
  • a communication device 5 includes a high frequency circuit 1, an antenna 2, and an RF signal processing circuit (RFIC) 3.
  • RFIC RF signal processing circuit
  • the high frequency circuit 1 transmits high frequency signals between the antenna 2 and the RFIC 3 .
  • a detailed circuit configuration of the high-frequency circuit 1 will be described later.
  • the antenna 2 is connected to the antenna connection terminal 100 of the high frequency circuit 1, transmits a high frequency signal output from the high frequency circuit 1, and receives a high frequency signal from the outside and outputs it to the high frequency circuit 1.
  • the RFIC 3 is an example of a signal processing circuit that processes high frequency signals. Specifically, the RFIC 3 performs signal processing such as down-conversion on the high-frequency received signal input via the receiving path of the high-frequency circuit 1, and converts the received signal generated by the signal processing to a baseband signal processing circuit ( BBIC: not shown). Further, the RFIC 3 performs signal processing such as up-conversion on the transmission signal input from the BBIC, and outputs the high-frequency transmission signal generated by the signal processing to the transmission path of the high-frequency circuit 1 . The RFIC 3 also has a control section that controls the switches and amplifiers of the high-frequency circuit 1 . Some or all of the functions of the RFIC 3 as a control section may be implemented outside the RFIC 3, for example, in the BBIC or the high frequency circuit 1. FIG.
  • the antenna 2 is not an essential component in the communication device 5 according to the present embodiment.
  • the high frequency circuit 1 includes filters 11, 12 and 20, a low noise amplifier 30, a power amplifier 40, switches 60, 61 and 62, a matching circuit 50, an antenna connection terminal 100, A high frequency output terminal 110 and a high frequency input terminal 120 are provided.
  • the antenna connection terminal 100 is connected to the antenna 2.
  • a high frequency input terminal 120 is a terminal for receiving a high frequency transmission signal from the outside of the high frequency circuit 1 .
  • a high-frequency output terminal 110 is a terminal for providing a high-frequency received signal to the outside of the high-frequency circuit 1 .
  • Filter 11 is an example of a second filter and has a passband that includes the first downlink operating band of the first band for frequency division duplexing (FDD). Filter 11 is connected to antenna connection terminal 100 via switch 60 .
  • FDD frequency division duplexing
  • Filter 12 is an example of a first filter and has a passband that includes the first uplink operating band of the first band for FDD. Filter 12 is connected to antenna connection terminal 100 via switch 60 .
  • one of the filters 11 and 12 includes the third band in the passband.
  • the third band overlaps at least a portion of the first downlink operating band and the first uplink operating band.
  • the filters 11 and 12 may constitute a duplexer that passes the transmission signal and reception signal of the first band.
  • the filter 20 is an example of a third filter and has a passband that includes at least part of the second band. Filter 20 is connected to antenna connection terminal 100 via switch 60 .
  • Power amplifier 40 is an example of a first power amplifier, and can amplify high-frequency transmission signals (hereinafter referred to as transmission signals) of first, second, and third bands input from high-frequency input terminal 120. .
  • Power amplifier 40 is connected between high frequency input terminal 120 and switch 62 .
  • the low-noise amplifier 30 is an example of a first low-noise amplifier, and amplifies the first and third band high-frequency received signals (hereinafter referred to as received signals) input from the antenna connection terminal 100 .
  • Low noise amplifier 30 is connected between high frequency output terminal 110 and switch 61 .
  • each of the 1st band, the 2nd band and the 3rd band is for a communication system constructed using radio access technology (RAT: Radio Access Technology). (Electrical and Electronics Engineers), etc.).
  • RAT Radio Access Technology
  • 5G (5th Generation)-NR New Radio
  • WLAN Wireless Local Area Network
  • the first band consists of a first downlink operating band and a first uplink operating band.
  • the second band consists of a second downlink operating band and a second uplink operating band.
  • the third band consists only of the third downlink operating band.
  • the uplink operating band means the frequency range designated for the uplink among the above bands.
  • the downlink operating band means the frequency range designated for the downlink among the above bands.
  • FIG. 2 is a diagram illustrating band combinations applied to the high-frequency circuit 1 according to the embodiment.
  • the first band is, for example, band B13 for LTE for frequency division duplex (FDD) or band n13 for 5G-NR (first down link operating band: 746-756 MHz, first uplink operating band: 777-787 MHz), and the second band is, for example, band B26 for LTE for FDD or band n26 for 5G-NR (second Uplink operating band: 814-849 MHz, secondary downlink operating band: 859-894 MHz).
  • the third band is for example band B67 for LTE or band n67 for 5G-NR (third downlink operating band: 738-758 MHz). The third band overlaps at least a portion of the first downlink operating band.
  • the switch 60 is an example of a first switch, and has four SPST (Single Pole Single Throw) type switch elements (first to fourth switch elements).
  • a common terminal 60 a which is one terminal of each switch element, is connected to the antenna connection terminal 100 .
  • a selection terminal 60 b (second terminal), which is the other terminal of the first switch element, is connected to the filter 11 .
  • a selection terminal 60 c (first terminal), which is the other terminal of the second switch element, is connected to the filter 12 .
  • a selection terminal 60 d (third terminal), which is the other terminal of the third switch element, is connected to the filter 20 .
  • a selection terminal 60 e (fourth terminal), which is the other terminal of the fourth switch element, is connected to the matching circuit 50 .
  • the switch 60 switches connection and disconnection between the antenna connection terminal 100 and the filter 11, switches connection and disconnection between the antenna connection terminal 100 and the filter 12, based on, for example, a control signal from the RFIC 3, Connection and disconnection between the antenna connection terminal 100 and the filter 20 are switched, and connection and disconnection between the antenna connection terminal 100 and the matching circuit 50 are switched.
  • the number of switch elements included in the switch 60 is appropriately set according to the number of filters and matching circuits included in the high frequency circuit 1 .
  • the fourth switch element that switches connection and disconnection between the common terminal 60a and the matching circuit 50 may not be included in the switch 60, and may be included in a second switch different from the switch 60.
  • a switch 61 is an example of a third switch and is connected between the filter 11 and the low noise amplifier 30 .
  • the switch 61 has a common terminal 61a and a selection terminal 61b.
  • the common terminal 61 a is connected to the input terminal of the low noise amplifier 30 .
  • the selection terminal 61b is connected to the filter 11.
  • FIG. With this connection configuration, the switch 61 switches connection and disconnection between the filter 11 and the low noise amplifier 30 based on, for example, a control signal from the RFIC 3 .
  • a switch 62 is an example of a fourth switch and is connected between filters 12 and 20 and power amplifier 40 .
  • the switch 62 has a common terminal 62a and select terminals 62b and 62c.
  • Common terminal 62 a is connected to the output terminal of power amplifier 40 .
  • the selection terminal 62 b is connected to the filter 12 and the selection terminal 62 c is connected to the filter 20 .
  • the switch 62 switches connection and disconnection between the filter 12 and the power amplifier 40, and switches connection and disconnection between the filter 20 and the power amplifier 40, based on a control signal from the RFIC 3, for example. .
  • the matching circuit 50 is an example of an impedance matching circuit, includes an impedance element, and is connected to the antenna connection terminal 100 via the switch 60 .
  • the impedance element is, for example, an inductor having one end connected to the selection terminal 60e and the other end connected to the ground.
  • the switch 60 may be formed in a semiconductor IC (Integrated Circuit). Furthermore, switches 61 and 62 may be included in the semiconductor IC. Also, the impedance element of the matching circuit 50 may be included in the semiconductor IC. According to this, the switches 60, 61, 62 and the impedance elements can be made compact and low profile.
  • the semiconductor IC is composed of, for example, CMOS (Complementary Metal Oxide Semiconductor). Specifically, it is formed by an SOI (Silicon On Insulator) process. This makes it possible to manufacture semiconductor ICs at low cost.
  • the semiconductor IC may be made of at least one of GaAs, SiGe and GaN. This makes it possible to output a high frequency signal with high quality amplification performance and noise performance.
  • high-frequency circuit 1 may include at least filters 11, 12 and 20, switch 60, and matching circuit 50, and may not include other circuit elements.
  • the first mode is a mode in which the transmission signal and reception signal of the first band are transmitted simultaneously.
  • the second mode is a mode in which the transmission signal and reception signal of the first band and the transmission signal of the second band are simultaneously transmitted (2 uplinks and 1 downlink).
  • the third mode is a mode for transmitting the received signal of the third band.
  • FIG. 3A is a diagram showing a first mode circuit state of the high-frequency circuit 1 according to the embodiment. As shown in the figure, when the first mode is executed, the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are connected, and the common terminal 60a and the selection terminal 60d are connected. are disconnected, and the common terminal 60a and the selection terminal 60e are disconnected.
  • the common terminal 62a and the selection terminal 62b are connected, the common terminal 62a and the selection terminal 62c are disconnected, and the common terminal 61a and the selection terminal 61b are connected.
  • filter 11 and low noise amplifier 30 are connected, filter 12 and power amplifier 40 are connected, and filter 20 and power amplifier 40 are disconnected.
  • the transmission signal of the first band is transmitted through the transmission path of the high frequency input terminal 120, the power amplifier 40, the switch 62, the filter 12, the switch 60, the antenna connection terminal 100, and the antenna 2.
  • a received signal of the first band is transmitted through a receiving path including the antenna 2 , the antenna connection terminal 100 , the switch 60 , the filter 11 , the switch 61 , the low noise amplifier 30 and the high frequency output terminal 110 .
  • FIG. 3B is a diagram showing a second mode circuit state of the high-frequency circuit 1 according to the embodiment. As shown in the figure, when the second mode is executed, the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are connected, and the common terminal 60a and the selection terminal 60d are connected. are connected, and the common terminal 60a and the selection terminal 60e are connected.
  • the common terminal 62a and the selection terminal 62b are connected, the common terminal 62a and the selection terminal 62c are connected, and the common terminal 61a and the selection terminal 61b are connected. . That is, filter 11 and low noise amplifier 30 are in a connected state, filter 12 and power amplifier 40 are in a connected state, and filter 20 and power amplifier 40 are in a connected state.
  • the transmission signal of the first band is transmitted through the transmission path of the high frequency input terminal 120, the power amplifier 40, the switch 62, the filter 12, the switch 60, the antenna connection terminal 100, and the antenna 2.
  • a received signal of the first band is transmitted through a receiving path including the antenna 2 , the antenna connection terminal 100 , the switch 60 , the filter 11 , the switch 61 , the low noise amplifier 30 and the high frequency output terminal 110 .
  • the transmission signal of the second band is transmitted through the transmission path including the high frequency input terminal 120 , the power amplifier 40 , the switch 62 , the filter 20 , the switch 60 , the antenna connection terminal 100 and the antenna 2 .
  • FIG. 3C is a diagram showing a third mode circuit state of the high-frequency circuit 1 according to the embodiment. As shown in the figure, when the third mode is executed, the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are disconnected, and the common terminal 60a and the selection terminal 60d are connected. are disconnected, and the common terminal 60a and the selection terminal 60e are connected.
  • the common terminal 62a and the selection terminal 62b are disconnected, the common terminal 62a and the selection terminal 62c are disconnected, and the common terminal 61a and the selection terminal 61b are connected. becomes. That is, filter 11 and low noise amplifier 30 are in a connected state, filter 12 and power amplifier 40 are in a non-connected state, and filter 20 and power amplifier 40 are in a non-connected state.
  • the received signal of the third band is transmitted through a receiving path including the antenna 2, the antenna connection terminal 100, the switch 60, the filter 11, the switch 61, the low noise amplifier 30, and the high frequency output terminal 110.
  • the impedance is matched without the matching circuit 50 connected, whereas the filter 11 is used for the reception of the third band.
  • the impedance is matched by connecting the matching circuit 50 to prevent the impedance from being shifted due to the filter 12 being in an open state. That is, even when the same filter 11 is used in the first mode and the third mode, the connection state of the matching circuit 50 is changed if the modes are different. Thereby, an increase in transmission loss of the high-frequency circuit 1 can be suppressed in both the first mode and the third mode using the same filter.
  • the impedance element (matching circuit 50) is used both in the third mode for transmitting the signals of the third band and in the second mode for simultaneously transmitting the signals of the first and second bands.
  • the impedance element (matching circuit 50) is not used in the first mode in which the signal of the first band is transmitted. Thereby, the high-frequency circuit 1 can be miniaturized compared to the case where different impedance elements are used in the third mode and the second mode.
  • the third mode may be a mode in which the reception signal of the third band and the transmission signal of the second band are simultaneously transmitted.
  • the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are disconnected, the common terminal 60a and the selection terminal 60d are connected, The common terminal 60a and the selection terminal 60e may be connected.
  • the common terminals 62a and 62b may be disconnected, the common terminals 62a and 62c may be connected, and the common terminals 61a and 61b may be connected. That is, filter 11 and low noise amplifier 30 may be in a connected state, filter 12 and power amplifier 40 may be in a non-connected state, and filter 20 and power amplifier 40 may be in a connected state.
  • the third mode may be a mode in which the reception signal of the third band, the transmission signal of the second band, and the reception signal of the second band are simultaneously transmitted.
  • the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are disconnected, the common terminal 60a and the selection terminal 60d are connected, and the common terminal 60a and the selection terminal 60a are selected.
  • the terminal 60e may be connected.
  • the common terminals 62a and 62b may be disconnected, the common terminals 62a and 62c may be connected, and the common terminals 61a and 61b may be connected.
  • filter 11 and low noise amplifier 30 may be in a connected state
  • filter 12 and power amplifier 40 may be in a non-connected state
  • filter 20 and power amplifier 40 may be in a connected state.
  • the circuit for transmitting the received signal of the second band is not shown in FIG. 3C.
  • the first band is, for example, band B28 or 5G for LTE for FDD.
  • - band n28 first uplink operating band: 703-748 MHz, first downlink operating band: 758-803 MHz
  • a second band e.g.
  • band B66 for LTE for FDD ( second uplink operating band: 1710-1780 MHz, second downlink operating band: 2110-2200 MHz), band B2 for LTE for FDD (second uplink operating band: 1850-1910 MHz, second downlink operating band : 1930-1990 MHz), or band n5 for 5G-NR (first uplink operating band: 824-849 MHz, first downlink operating band: 869-894 MHz).
  • the third band is for example band B29 (third downlink operating band: 717-728 MHz) for LTE.
  • the third band overlaps at least a portion of the first uplink operating band.
  • the second band is band B66 for LTE
  • the transmission of band n77 3300-4200 MHz
  • the signal may be transmitted in a circuit different from the circuit configuration of the high frequency circuit 1 shown in FIG. 3C. That is, it is possible to support simultaneous transmission of the transmission signal and reception signal of band B66, the transmission signal or reception signal of band n77, and the reception signal of band B29 (2 uplinks/3 downlinks: DC (Dual Connectivity)_29_66_n77).
  • the received signal of the third band, the transmitted signal and the received signal of the second band, and the transmitted signal of band n77 for 5G-NR are shown in FIG. 3C may be transmitted in a circuit different from the circuit configuration of the high-frequency circuit 1 shown in FIG. That is, it is possible to support simultaneous transmission (2 uplinks/3 downlinks: DC_2_29_n77) of the transmission signal and reception signal of band B2, the transmission signal or reception signal of band n77, and the reception signal of band B29.
  • the received signal of the third band, the transmitted signal and received signal of the second band, and the transmitted signal and received signal of band B2 for LTE are simultaneously may be transmitted in a circuit different from the circuit configuration of the high-frequency circuit 1 shown in FIG. 3C.
  • the received signal of band n77 for 5G-NR may be transmitted in a circuit different from the circuit configuration of the high frequency circuit 1 shown in FIG. 3C. That is, simultaneous transmission of band B2 and band n5 transmission signals and band B2, band n5, band B29 and band n77 reception signals (2 uplinks/4 downlinks: DC_2_29_n5_n77) is possible.
  • the transmitted signal and received signal of band B2 for LTE are shown in FIG. 3C may be transmitted in a circuit different from the circuit configuration of the high-frequency circuit 1 shown in FIG.
  • the transmission signal and reception signal of band n77 for 5G-NR may be transmitted in a circuit different from the circuit configuration of the high frequency circuit 1 shown in FIG. 3C. That is, simultaneous transmission of band B2 and band n77 transmission signals and band B2, band n5, band B29 and band n77 reception signals (2 uplinks/4 downlinks: DC_2_29_n5_n77) is possible.
  • the connection configuration of the switch 60 as described above is shown. It may also have a reverse connection configuration. That is, in the first mode, the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are connected, the common terminal 60a and the selection terminal 60d are disconnected, and the common terminal 60a is connected. and the selection terminal 60e are connected. In the second mode, the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are connected, the common terminal 60a and the selection terminal 60d are connected, and the common terminal 60a and the selection terminal 60d are connected. The selection terminal 60e is disconnected.
  • the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are disconnected, the common terminal 60a and the selection terminal 60d are disconnected, and the common terminal 60a and the selection terminal 60d are disconnected.
  • the selection terminal 60e is disconnected.
  • the impedance is matched with the matching circuit 50 connected, whereas the filter 11 is used as a duplexer for the third band.
  • impedance matching is achieved by not connecting the matching circuit 50 to prevent impedance deviation due to the filter 12 being in an open state. That is, even when the same filter 11 is used in the first mode and the third mode, the connection state of the matching circuit 50 is changed if the modes are different. Thereby, an increase in transmission loss of the high-frequency circuit 1 can be suppressed in both the first mode and the third mode using the same filter.
  • the impedance element (matching circuit 50) is not used in the third mode for transmitting the signals of the third band and the second mode for simultaneously transmitting the signals of the first and second bands. Also, the impedance element (matching circuit 50) is used in the first mode for transmitting the signal of the first band. Thereby, the high-frequency circuit 1 can be miniaturized compared to the case where different impedance elements are used in the third mode and the second mode.
  • FIG. 4A is a diagram showing a first mode circuit state of the high-frequency circuit 1A according to Modification 1 of the embodiment.
  • FIG. 4B is a diagram showing a second mode circuit state of the high-frequency circuit 1A according to Modification 1 of the embodiment.
  • FIG. 4C is a diagram showing a third mode circuit state of the high-frequency circuit 1A according to Modification 1 of the embodiment.
  • the high frequency circuit 1A includes filters 11, 12 and 20, a low noise amplifier 30, a power amplifier 40, switches 60, 61 and 62, a matching circuit 50 and an antenna connection terminal. 100 , a high frequency output terminal 110 and a high frequency input terminal 120 .
  • a high-frequency circuit 1A according to this modification differs from the high-frequency circuit 1 according to the embodiment in the configuration of the switch 61 and the connection configuration between the switches 61 and 62 and the filter 12 .
  • descriptions of the same points as those of the high-frequency circuit 1 according to the embodiment will be omitted, and different points will be mainly described.
  • Power amplifier 40 is an example of a first power amplifier, and can amplify high-frequency transmission signals (hereinafter referred to as transmission signals) of first, second, and third bands input from high-frequency input terminal 120. .
  • Power amplifier 40 is connected between high frequency input terminal 120 and switch 62 .
  • the low-noise amplifier 30 is an example of a second low-noise amplifier, and amplifies high-frequency received signals (hereinafter referred to as received signals) of the first band and the third band input from the antenna connection terminal 100 .
  • Low noise amplifier 30 is connected between high frequency output terminal 110 and switch 61 .
  • the first band consists of a first downlink operating band and a first uplink operating band.
  • the second band consists of a second downlink operating band and a second uplink operating band.
  • the third band consists only of the third downlink operating band.
  • FIG. 5 is a diagram illustrating band combinations applied to the high-frequency circuit 1A according to Modification 1 of the embodiment.
  • the first band is, for example, band B28 for LTE for FDD or band n28 for 5G-NR (first uplink operating band: 703-748 MHz, first downlink link operating band: 758-803 MHz)
  • the second band is, for example, band B20 for LTE for FDD or band n20 for 5G-NR (second downlink operating band: 791-821 MHz, second Uplink operating band: 832-862 MHz).
  • the third band is for example band B29 for LTE or band n29 for 5G-NR (third downlink operating band: 717.25-727.25 MHz).
  • the third band overlaps at least a portion of the first uplink operating band.
  • the first downlink operating band and the second downlink operating band at least partially overlap.
  • the switch 61 is an example of a fifth switch and is connected between the filters 11 and 12 and the low noise amplifier 30. Specifically, the switch 61 has a common terminal 61a and select terminals 61b and 61c. The common terminal 61 a is connected to the input terminal of the low noise amplifier 30 . The selection terminal 61 b is connected to the filter 11 and the selection terminal 61 c is connected to the filter 12 . With this connection configuration, the switch 61 switches connection and disconnection between the filter 11 and the low noise amplifier 30 and connection and disconnection between the filter 12 and the low noise amplifier 30 based on, for example, a control signal from the RFIC 3 . switch.
  • a switch 62 is an example of a fourth switch and is connected between filters 12 and 20 and power amplifier 40 .
  • the switch 62 has a common terminal 62a and select terminals 62b and 62c.
  • Common terminal 62 a is connected to the output terminal of power amplifier 40 .
  • the selection terminal 62 b is connected to the filter 12 and the selection terminal 62 c is connected to the filter 20 .
  • the switch 62 switches connection/disconnection between the filter 12 and the power amplifier 40 and switches connection/disconnection between the filter 20 and the power amplifier 40 based on, for example, a control signal from the RFIC 3 .
  • the matching circuit 50 is an example of an impedance matching circuit, includes an impedance element, and is connected to the antenna connection terminal 100 via the switch 60 .
  • the impedance element is, for example, an inductor having one end connected to the selection terminal 60e and the other end connected to the ground.
  • the first mode is a mode in which the transmission signal and reception signal of the first band are transmitted simultaneously.
  • the second mode is a mode in which the transmission signal and reception signal of the first band and the transmission signal of the second band are simultaneously transmitted (2 uplinks and 1 downlink).
  • the third mode is a mode for transmitting the received signal of the third band.
  • the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are connected, and the common terminal 60a and the selection terminal 60d are connected. are disconnected, and the common terminal 60a and the selection terminal 60e are disconnected.
  • the common terminal 62a and the selection terminal 62b are connected, the common terminal 62a and the selection terminal 62c are disconnected, and the common terminal 61a and the selection terminal 61b are connected. , the common terminal 61a and the selection terminal 61c are disconnected.
  • filter 11 and low noise amplifier 30 are connected, filter 12 and power amplifier 40 are connected, and filter 20 and power amplifier 40 are disconnected.
  • the transmission signal of the first band is transmitted through the transmission path of the high frequency input terminal 120, the power amplifier 40, the switch 62, the filter 12, the switch 60, the antenna connection terminal 100, and the antenna 2.
  • a received signal of the first band is transmitted through a receiving path including the antenna 2 , the antenna connection terminal 100 , the switch 60 , the filter 11 , the switch 61 , the low noise amplifier 30 and the high frequency output terminal 110 .
  • the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are connected, and the common terminal 60a and the selection terminal 60d are connected. are connected, and the common terminal 60a and the selection terminal 60e are connected.
  • the common terminal 62a and the selection terminal 62b are connected, the common terminal 62a and the selection terminal 62c are connected, the common terminal 61a and the selection terminal 61b are connected, The common terminal 61a and the selection terminal 61c are disconnected. That is, filter 11 and low noise amplifier 30 are in a connected state, filter 12 and power amplifier 40 are in a connected state, and filter 20 and power amplifier 40 are in a connected state.
  • the transmission signal of the first band is transmitted through the transmission path of the high frequency input terminal 120, the power amplifier 40, the switch 62, the filter 12, the switch 60, the antenna connection terminal 100, and the antenna 2.
  • a received signal of the first band is transmitted through a receiving path including the antenna 2 , the antenna connection terminal 100 , the switch 60 , the filter 11 , the switch 61 , the low noise amplifier 30 and the high frequency output terminal 110 .
  • the transmission signal of the second band is transmitted through the transmission path including the high frequency input terminal 120 , the power amplifier 40 , the switch 62 , the filter 20 , the switch 60 , the antenna connection terminal 100 and the antenna 2 .
  • the common terminal 60a and the selection terminal 60b are disconnected, the common terminal 60a and the selection terminal 60c are connected, and the common terminal 60a and the selection terminal 60d are connected. are disconnected, and the common terminal 60a and the selection terminal 60e are connected.
  • the common terminal 62a and the selection terminal 62b are disconnected, the common terminal 62a and the selection terminal 62c are disconnected, and the common terminal 61a and the selection terminal 61b are disconnected. state, and the common terminal 61a and the selection terminal 61c are connected. That is, the filter 11 and the low noise amplifier 30 are disconnected, the filter 12 and the power amplifier 40 are connected, and the filter 20 and the power amplifier 40 are disconnected.
  • the received signal of the third band is transmitted through a receiving path including the antenna 2, the antenna connection terminal 100, the switch 60, the filter 12, the switch 61, the low noise amplifier 30, and the high frequency output terminal 110.
  • the impedance is matched without the matching circuit 50 connected, whereas the filter 12 is used for the reception of the third band.
  • the impedance is matched by connecting the matching circuit 50 to prevent the impedance from being shifted due to the filter 11 being in an open state. That is, even if the same filter 12 is used in the first mode and the third mode, the connection state of the matching circuit 50 is changed if the modes are different. This can suppress an increase in transmission loss of the high-frequency circuit 1A in both the first mode and the third mode using the same filter.
  • the impedance element (matching circuit 50) is used both in the third mode for transmitting the signals of the third band and in the second mode for simultaneously transmitting the signals of the first and second bands.
  • the impedance element (matching circuit 50) is not used in the first mode in which the signal of the first band is transmitted. Thereby, the high-frequency circuit 1A can be miniaturized compared to the case where different impedance elements are used in the third mode and the second mode.
  • the filter 12 has a switch configuration that can be connected to both the power amplifier 40 and the low noise amplifier 30, the filter 12 used as a transmission filter in the first mode is used as a reception filter in the third mode. It is possible to
  • FIG. 6A is a diagram showing a second mode circuit state of the high-frequency circuit 1B according to Modification 2 of the embodiment.
  • the high frequency circuit 1B includes filters 11, 12 and 20, low noise amplifiers 30 and 31, a power amplifier 40, switches 60, 61, 63 and 64, a matching circuit 50, an antenna connection a terminal 100;
  • High-frequency circuit 1B according to the present modification differs from high-frequency circuit 1 according to the embodiment in that switches 63 and 64 are added instead of switch 62 and low-noise amplifier 31 is added. is different.
  • description of the same points as those of the high-frequency circuit 1 according to the embodiment will be omitted, and different points will be mainly described.
  • the power amplifier 40 is an example of a second power amplifier, and can amplify transmission signals of the first band and the third band input from the high frequency input terminal 120 .
  • Power amplifier 40 is connected to switch 63 .
  • the low-noise amplifier 30 is an example of a first low-noise amplifier, and amplifies received signals of the first band and the third band input from the antenna connection terminal 100 .
  • Low noise amplifier 30 is connected to switch 61 .
  • the low-noise amplifier 31 is an example of a third low-noise amplifier, and amplifies the second band received signal input from the antenna connection terminal 100 .
  • Low noise amplifier 31 is connected to switch 64 .
  • a switch 61 is an example of a third switch and is connected between the filter 11 and the low noise amplifier 30 .
  • the switch 61 has a common terminal 61a and a selection terminal 61b.
  • the common terminal 61 a is connected to the input terminal of the low noise amplifier 30 .
  • the selection terminal 61b is connected to the filter 11.
  • FIG. With this connection configuration, the switch 61 switches connection and disconnection between the filter 11 and the low noise amplifier 30 based on, for example, a control signal from the RFIC 3 .
  • a switch 63 is an example of a sixth switch and is connected between the filter 12 and the power amplifier 40 .
  • the switch 63 has a common terminal 63a and a selection terminal 63b.
  • the common terminal 63 a is connected to the output terminal of the power amplifier 40 .
  • the selection terminal 63b is connected to the filter 12.
  • FIG. With this connection configuration, the switch 63 switches connection and disconnection between the filter 12 and the power amplifier 40 based on a control signal from the RFIC 3, for example.
  • the switch 64 is an example of a seventh switch and is connected between the filter 20 and the low noise amplifier 31. Specifically, the switch 64 has a common terminal 64a and a selection terminal 64b. The common terminal 64 a is connected to the input terminal of the low noise amplifier 31 . The selection terminal 64b is connected to the filter 20. FIG. With this connection configuration, the switch 64 switches connection and disconnection between the filter 20 and the low noise amplifier 31 based on, for example, a control signal from the RFIC 3 .
  • the first mode is a mode in which the transmission signal and reception signal of the first band are transmitted simultaneously.
  • the second mode is a mode in which the transmission signal and reception signal of the first band and the reception signal of the second band are simultaneously transmitted (1 uplink, 2 downlinks).
  • the third mode is a mode for transmitting the received signal of the third band.
  • the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are connected, the common terminal 60a and the selection terminal 60d are disconnected, and the common terminal 60a and the selection terminal 60d are disconnected.
  • the terminal 60a and the selection terminal 60e are disconnected.
  • the common terminal 61a and the selection terminal 61b are connected, the common terminal 63a and the selection terminal 63c are connected, and the common terminal 64a and the selection terminal 64b are disconnected.
  • filter 11 and low noise amplifier 30 are in a connected state
  • filter 12 and power amplifier 40 are in a connected state
  • filter 20 and low noise amplifier 31 are in a non-connected state.
  • the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are connected, and the common terminal 60a and the selection terminal 60d are connected. are connected, and the common terminal 60a and the selection terminal 60e are connected.
  • the common terminal 61a and the selection terminal 61b are connected, the common terminal 63a and the selection terminal 63c are connected, and the common terminal 64a and the selection terminal 64b are connected. . That is, the filter 11 and the low noise amplifier 30 are connected, the filter 12 and the power amplifier 40 are connected, and the filter 20 and the low noise amplifier 31 are connected.
  • the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are disconnected, the common terminal 60a and the selection terminal 60d are disconnected, The common terminal 60a and the selection terminal 60e are connected.
  • the common terminal 61a and the selection terminal 61b are connected, the common terminal 63a and the selection terminal 63b are disconnected, and the common terminal 64a and the selection terminal 64b are disconnected. becomes. That is, the filter 11 and the low noise amplifier 30 are connected, the filter 12 and the power amplifier 40 are disconnected, and the filter 20 and the low noise amplifier 31 are disconnected.
  • the impedance is matched without the matching circuit 50 connected, whereas the filter 11 is used for the reception of the third band.
  • the impedance is matched by connecting the matching circuit 50 to prevent the impedance from being shifted due to the filter 12 being in an open state. That is, even when the same filter 11 is used in the first mode and the third mode, the connection state of the matching circuit 50 is changed if the modes are different. This can suppress an increase in transmission loss of the high-frequency circuit 1B in both the first mode and the third mode using the same filter.
  • the impedance element (matching circuit 50) is used both in the third mode for transmitting the signals of the third band and in the second mode for simultaneously transmitting the signals of the first and second bands.
  • the impedance element (matching circuit 50) is not used in the first mode in which the signal of the first band is transmitted. Thereby, the high-frequency circuit 1B can be miniaturized compared to the case where different impedance elements are used in the third mode and the second mode.
  • the filter 20 is configured to be connectable to the low noise amplifier 31, it is possible to perform 1 uplink and 2 downlinks in the second mode.
  • FIG. 6B is a diagram showing a second mode circuit state of the high-frequency circuit 1C according to Modification 3 of the embodiment.
  • high frequency circuit 1C includes filters 11, 12 and 20, low noise amplifier 32, power amplifier 40, divider 70, switches 60, 61, 63 and 64, matching circuit 50 and , and an antenna connection terminal 100 .
  • a high-frequency circuit 1C according to this modification differs from the high-frequency circuit 1B according to modification 2 in that a low-noise amplifier 32 and a distributor 70 are arranged instead of the low-noise amplifiers 30 and 31 .
  • description of the same points as those of the high-frequency circuit 1B according to the second modified example will be omitted, and different points will be mainly described.
  • the low-noise amplifier 32 is an example of a fourth low-noise amplifier, and amplifies received signals of the first band, the second band, and the third band input from the antenna connection terminal 100 .
  • Low noise amplifier 32 has its input terminals connected to switches 61 and 64 and its output terminal connected to distributor 70 .
  • the distributor 70 power-divides a high-frequency signal input to an input terminal, and outputs the power-divided high-frequency signal from two output terminals.
  • a switch 61 is an example of a third switch and is connected between the filter 11 and the low noise amplifier 32 .
  • the switch 61 has a common terminal 61a and a selection terminal 61b.
  • the common terminal 61 a is connected to the input terminal of the low noise amplifier 32 .
  • the selection terminal 61b is connected to the filter 11.
  • FIG. With this connection configuration, the switch 61 switches connection and disconnection between the filter 11 and the low noise amplifier 32 based on, for example, a control signal from the RFIC 3 .
  • a switch 63 is an example of a sixth switch and is connected between the filter 12 and the power amplifier 40 .
  • the switch 63 has a common terminal 63a and a selection terminal 63b.
  • the common terminal 63 a is connected to the output terminal of the power amplifier 40 .
  • the selection terminal 63b is connected to the filter 12.
  • FIG. With this connection configuration, the switch 63 switches connection and disconnection between the filter 12 and the power amplifier 40 based on a control signal from the RFIC 3, for example.
  • a switch 64 is an example of a seventh switch and is connected between the filter 20 and the low noise amplifier 32 .
  • the switch 64 has a common terminal 64a and a selection terminal 64b.
  • Common terminal 64 a is connected to the input terminal of low noise amplifier 32 .
  • the selection terminal 64b is connected to the filter 20.
  • FIG. With this connection configuration, the switch 64 switches connection and disconnection between the filter 20 and the low noise amplifier 32 based on a control signal from the RFIC 3, for example.
  • the high-frequency circuit 1C according to the present modification has the same effect as the high-frequency circuit 1B according to the second modification, and uses one low-noise amplifier instead of two low-noise amplifiers for the first to third low-noise amplifiers. Since the received signal of the mode can be amplified, it is possible to reduce the power consumption and size of the high frequency circuit 1C.
  • FIG. 7 is a diagram showing a second mode circuit state of the high-frequency circuit 1D according to Modification 4 of the embodiment.
  • the high frequency circuit 1D includes filters 11, 12 and 20, low noise amplifiers 30 and 31, power amplifiers 40 and 41, switches 60, 61, 63 and 65, a matching circuit 50, and an antenna connection terminal 100 .
  • a high-frequency circuit 1D according to this modification differs from the high-frequency circuit 1B according to modification 2 in that a switch 65 is arranged instead of the switch 64 and a power amplifier 41 is added.
  • description of the same points as those of the high-frequency circuit 1B according to the second modified example will be omitted, and different points will be mainly described.
  • the power amplifier 40 is an example of a second power amplifier, and can amplify transmission signals of the first band and the third band. Power amplifier 40 is connected to switch 63 .
  • the low-noise amplifier 30 is an example of a first low-noise amplifier, and amplifies received signals of the first band and the third band input from the antenna connection terminal 100 .
  • Low noise amplifier 30 is connected to switch 61 .
  • the power amplifier 41 is an example of a third power amplifier and can amplify the transmission signal of the second band. Power amplifier 41 is connected to switch 65 .
  • the low-noise amplifier 31 is an example of a third low-noise amplifier, and amplifies the second band received signal input from the antenna connection terminal 100 .
  • Low noise amplifier 31 is connected to switch 65 .
  • a switch 61 is an example of a third switch and is connected between the filter 11 and the low noise amplifier 30 .
  • the switch 61 has a common terminal 61a and a selection terminal 61b.
  • the common terminal 61 a is connected to the input terminal of the low noise amplifier 30 .
  • the selection terminal 61b is connected to the filter 11.
  • FIG. With this connection configuration, the switch 61 switches connection and disconnection between the filter 11 and the low noise amplifier 30 based on, for example, a control signal from the RFIC 3 .
  • a switch 63 is an example of a sixth switch and is connected between the filter 12 and the power amplifier 40 .
  • the switch 63 has a common terminal 63a and a selection terminal 63b.
  • the common terminal 63 a is connected to the output terminal of the power amplifier 40 .
  • the selection terminal 63b is connected to the filter 12.
  • FIG. With this connection configuration, the switch 63 switches connection and disconnection between the filter 12 and the power amplifier 40 based on a control signal from the RFIC 3, for example.
  • a switch 65 is an example of an eighth switch and is connected between the filter 20 and the low noise amplifier 31 and power amplifier 41 .
  • the switch 65 has a common terminal 65a and selection terminals 65b and 65c.
  • the common terminal 65 a is connected to the filter 20
  • the selection terminal 65 b is connected to the output terminal of the power amplifier 41
  • the selection terminal 65 c is connected to the input terminal of the low noise amplifier 31 .
  • the switch 65 switches the connection between the filter 20 and the low noise amplifier 31 and the connection between the filter 20 and the power amplifier 41 based on a control signal from the RFIC 3, for example.
  • the high-frequency circuit 1D according to this modified example has the same effects as the high-frequency circuit 1B according to the modified example 2, and the filter 20 can be used in a time division duplex (TDD) system. In other words, it is possible to perform both 1 uplink 2 downlink and 2 uplink 1 downlink in the second mode.
  • TDD time division duplex
  • the high-frequency circuit 1 according to the present embodiment and the high-frequency circuit 1A according to the first modification include the filter 12 having a passband including the uplink operating band in the first band for FDD, the first a filter 11 having a passband including the downlink operating band of the bands; a filter 20 having a passband including at least a portion of the second band; a matching circuit 50; It has a selection terminal 60b, a selection terminal 60c connected to the filter 12, and a selection terminal 60d connected to the filter 20, and switches between conduction and non-conduction between the common terminal 60a and the selection terminal 60b.
  • a switch 60 that switches between conduction and non-conduction with 60c and switches between conduction and non-conduction between the common terminal 60a and the selection terminal 60d; a fourth switch element that switches between conduction and non-conduction between the common terminal 60a and the matching circuit 50; Prepare.
  • One of filters 11 and 12 includes the third band in its passband. In the first mode in which the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are connected, and the common terminal 60a and the selection terminal 60d are disconnected, the common terminal 60a and the selection terminal 60d are matched. The circuit 50 is disconnected.
  • the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are connected, and the common terminal 60a and the selection terminal 60d are connected, the common terminal 60a and the matching circuit are connected. 50 are connected.
  • the common terminal 60a and one of the selection terminals 60b and 60c are connected and the common terminal 60a and the other of the selection terminals 60b and 60c are disconnected, the common terminal 60a and the matching circuit 50 are connected. state.
  • the impedance in the first mode, the impedance was matched without the matching circuit 50 being connected, whereas in the third mode, the other of the filters 11 and 12 is in an open state and the impedance is shifted. , impedance matching is achieved by connecting the matching circuit 50 . That is, even if one of the same filters 11 and 12 is used, the connection state of the matching circuit 50 is changed if the transmission modes are different. Thereby, an increase in transmission loss of the high-frequency circuit 1 can be suppressed in both the first mode and the third mode using the same filter. Also, the matching circuit 50 is used in the third mode and the second mode. Also, the matching circuit 50 is not used in the first mode. Thereby, the high-frequency circuits 1 and 1A can be miniaturized compared to the case where different impedance elements are used in the third mode and the second mode.
  • the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are connected, and the common terminal
  • the common terminal 60a and matching circuit 50 are in a connected state.
  • the common terminal 60a and the selection terminal 60b are connected, the common terminal 60a and the selection terminal 60c are connected, and the common terminal 60a and the selection terminal 60d are connected, the common terminal 60a and the matching circuit are connected. 50 are disconnected.
  • the common terminal 60a and one of the selection terminals 60b and 60c are connected and the common terminal 60a and the other of the selection terminals 60b and 60c are disconnected, the common terminal 60a and the matching circuit 50 are disconnected. Connected.
  • the high-frequency circuit 1 is further connected between the low-noise amplifier 30, the power amplifier 40, the low-noise amplifier 30 and the filter 11, and switches connection and disconnection between the low-noise amplifier 30 and the filter 11.
  • the switch 61 is connected between the power amplifier 40 and the filter 12 and the filter 20, switches connection and disconnection between the power amplifier 40 and the filter 12, and connects and disconnects the power amplifier 40 and filter 20.
  • a switch 62 for switching may be provided.
  • the high frequency circuit 1 can be miniaturized.
  • the filter 11 and the low noise amplifier 30 are in a connected state, the filter 12 and the power amplifier 40 are in a connected state, and the filter 20 and the power amplifier 40 are in a connected state.
  • the filter 11 and the low noise amplifier 30 are connected, the filter 12 and the power amplifier 40 are connected, and the filter 20 and the power amplifier 40 are connected.
  • the filter 11 and the low noise amplifier 30 are connected, the filter 12 and the power amplifier 40 are disconnected, and the filter 20 and the power amplifier 40 are disconnected. good too.
  • the first band is band B13 for LTE or band n13 for 5G-NR
  • the second band is band B26 for LTE or band for 5G-NR
  • n26 and the third band may be B67 for LTE or band n67 for 5G-NR.
  • the high-frequency circuit 1A according to Modification 1 is further connected between the low-noise amplifier 30, the power amplifier 40, the low-noise amplifier 30 and the filters 11 and 12, and the low-noise amplifier 30 and the filter 11 and a switch 61 for switching connection and disconnection between the low-noise amplifier 30 and the filter 12, and between the power amplifier 40 and the filters 12 and 20, the power amplifier 40 and the filter 12 and a switch 62 that switches connection and disconnection with and switches connection and disconnection between the power amplifier 40 and the filter 20 .
  • the filter 12 since the filter 12 has a switch configuration that can be connected to both the power amplifier 40 and the low noise amplifier 30, the filter 12 is used as a transmission filter in the first mode, and is used as a reception filter in the third mode. Can be used as a filter.
  • the filter 11 and the low noise amplifier 30 are in a connected state, the filter 12 and the power amplifier 40 are in a connected state, and the filter 20 and
  • the filter 11 and the low noise amplifier 30 are connected, the filter 12 and the power amplifier 40 are connected, and the filter 20 and the power amplifier 40 are connected.
  • the filter 11 and low noise amplifier 30 are disconnected, filter 12 and low noise amplifier 30 are connected, and filter 20 and power amplifier 40 are connected. It may be in a non-connected state.
  • the first band is band B28 for LTE or band n28 for 5G-NR
  • the second band is band B20 for LTE or band for 5G-NR
  • n20 and the third band may be band B29 for LTE or band n29 for 5G-NR.
  • the high-frequency circuit 1B according to the modification 2 is further connected between the low-noise amplifiers 30 and 31, the power amplifier 40, the low-noise amplifier 30 and the filter 11, and the low-noise amplifier 30 and the filter 11 a switch 61 connected between the power amplifier 40 and the filter 12 and switching between connection and disconnection between the power amplifier 40 and the filter 12; a low noise amplifier 31 and the filter 20; , and a switch 64 for switching connection and disconnection between the low noise amplifier 31 and the filter 20 .
  • the filter 20 is configured to be connectable to the low noise amplifier 31, it is possible to perform one uplink and two downlinks in the second mode.
  • the high-frequency circuit 1C according to Modification 3 is further connected between the low-noise amplifier 32, the power amplifier 40, the low-noise amplifier 32 and the filter 11, and the connection between the low-noise amplifier 32 and the filter 11.
  • reception signals of the first to third modes can be amplified by one low noise amplifier 32, it is possible to reduce the power consumption and size of the high frequency circuit 1C.
  • high-frequency circuit 1D is further connected between low-noise amplifiers 30 and 31, power amplifiers 40 and 41, low-noise amplifier 30 and filter 11, and is connected between low-noise amplifier 30 and filter 11.
  • a switch 63 connected between the power amplifier and the 40 filter 12 for switching connection and disconnection between the power amplifier 40 and the filter 12
  • a low noise amplifier 31 and power A switch 65 connected between the amplifier 41 and the filter 20 and switching between the connection between the low noise amplifier 31 and the filter 20 and the connection between the power amplifier 41 and the filter 20 may be provided.
  • the filter 20 can be used in TDD. In other words, it is possible to perform both 1 uplink 2 downlink and 2 uplink 1 downlink in the second mode.
  • the impedance element included in the matching circuit 50 may be an inductor having one end connected to the fourth switch element and the other end connected to the ground.
  • the fourth switch element may be included in the switch 60 .
  • the high frequency circuit 1 can be miniaturized.
  • the switch 60 may be included in a semiconductor IC.
  • the switch 60 can be reduced in size and height.
  • the impedance element may be included in the semiconductor IC.
  • the communication device 5 includes an RFIC 3 that processes high frequency signals, and a high frequency circuit 1 that transmits high frequency signals between the RFIC 3 and the antenna 2 .
  • the communication device 5 can achieve the same effects as those of the high-frequency circuit 1 described above.
  • bands for 5G-NR or LTE were used, but in addition to or instead of 5G-NR or LTE, communication bands for other radio access technologies are used. good too.
  • communication bands for wireless local area networks may be used.
  • a millimeter wave band of 7 gigahertz or more may be used.
  • the high-frequency circuit 1, the antenna 2, and the RFIC 3 constitute a millimeter wave antenna module, and a distributed constant filter, for example, may be used as the filter.
  • the present invention can be widely used in communication equipment such as mobile phones as a high-frequency circuit arranged in the front end section.
  • RFIC RF signal processing circuit
  • 12 20 filter 30, 31, 32 low noise amplifier 40, 41 power amplifier 50 matching circuit 60, 61, 62, 63, 64, 65 switch 60a, 61a, 62a, 63a, 64a, 65a common terminal 60b, 60c, 60d, 60e, 61b, 61c, 62b, 62c, 63b, 64b, 65b, 65c selection terminal 70 distributor 100 antenna connection terminal 110 high frequency output terminal 120 high frequency input terminal

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Circuit haute fréquence (1) comprenant un commutateur (60) comportant une borne commune (60a), une borne de sélection (60b) connectée à un filtre (11), une borne de sélection (60c) connectée à un filtre (12), une borne de sélection (60d) connectée à un filtre (20), et une borne de sélection (60e) connectée à un circuit d'adaptation (50). Lorsqu'un signal de transmission/réception dans une première bande est transmis, la borne commune (60a) est connectée aux bornes de sélection (60b et 60c), et la borne commune (60a) n'est pas connectée aux bornes de sélection (60d et 60e). Lorsqu'un signal de transmission/réception dans la première bande et qu'un signal dans une seconde bande sont transmis simultanément, la borne commune (60a) est connectée à la borne de sélection (60b), à la borne de sélection (60c), à la borne de sélection (60d), et à la borne de sélection (60e). Lorsqu'un signal dans une troisième bande est transmis, la borne commune (60a) est connectée aux bornes de sélection (60b 60e), et la borne commune (60a) n'est pas connectée aux bornes de sélection (60c et 60d).
PCT/JP2022/010314 2021-03-31 2022-03-09 Circuit haute fréquence et dispositif de communication WO2022209665A1 (fr)

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JP2021-060108 2021-03-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024079964A1 (fr) * 2022-10-12 2024-04-18 株式会社村田製作所 Circuit haute fréquence

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015023557A (ja) * 2013-07-23 2015-02-02 太陽誘電株式会社 電子回路
WO2017073509A1 (fr) * 2015-10-26 2017-05-04 株式会社村田製作所 Module d'interrupteur
WO2018061782A1 (fr) * 2016-09-27 2018-04-05 株式会社村田製作所 Circuit frontal à haute fréquence et dispositif de communication
WO2020153285A1 (fr) * 2019-01-23 2020-07-30 株式会社村田製作所 Circuit frontal haute fréquence et dispositif de communication

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015023557A (ja) * 2013-07-23 2015-02-02 太陽誘電株式会社 電子回路
WO2017073509A1 (fr) * 2015-10-26 2017-05-04 株式会社村田製作所 Module d'interrupteur
WO2018061782A1 (fr) * 2016-09-27 2018-04-05 株式会社村田製作所 Circuit frontal à haute fréquence et dispositif de communication
WO2020153285A1 (fr) * 2019-01-23 2020-07-30 株式会社村田製作所 Circuit frontal haute fréquence et dispositif de communication

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024079964A1 (fr) * 2022-10-12 2024-04-18 株式会社村田製作所 Circuit haute fréquence

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