High-frequency module and communication device

Abstract

A high-frequency module (1) is provided with: a power amplifier (11) configured so as to be able to amplify a signal in a first frequency band; a low noise amplifier (22) configured so as to be able to amplify a signal in the second frequency band; and an IMD suppression circuit (50) that is connected to the power amplifier (11), a power amplifier (12) capable of amplifying a signal of a third frequency band, and the low noise amplifier (22), and that generates an IMD suppression signal that includes a frequency component of intermodulation distortion of the first frequency band and the third frequency band, the signal of the first frequency band, the signal of the second frequency band, and the signal of the third frequency band being capable of being transmitted at the same time. The frequency of the intermodulation distortion is included in a second frequency band.

Description

Technical Field

[0001] The invention relates to a high-frequency module and a communication device. Background Art

[0002] Patent document 1 discloses a wireless frequency system (high frequency module) capable of transmitting signals of multiple frequency bands simultaneously. In the wireless frequency system (high frequency module) disclosed in patent document 1, a plurality of multiplexers are connected to each other directly or via a switch or a diplexer. The plurality of multiplexers are connected to a power amplifier for amplifying a transmission signal or a low noise amplifier for amplifying a reception signal.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2021-48594 Summary of the invention

[0006] Problem that the invention aims to solve

[0007] In the high frequency module disclosed in Patent Document 1, for example, when performing simultaneous transmission of transmission signals of two frequency bands and reception signals of one frequency band (two uplinks and one downlink), an unwanted signal of intermodulation distortion (IMD) is generated due to interference between the two transmission signals. When the frequency of the unwanted signal of the intermodulation distortion is included in the frequency band of the reception signal, the unwanted signal sometimes becomes reception noise through the reception path for transmitting the reception signal, resulting in deterioration of reception sensitivity.

[0008] Therefore, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a high-frequency module and a communication device that suppress the degradation of reception sensitivity due to intermodulation distortion of a plurality of transmission signals.

[0009] Solutions for solving problems

[0010] In order to achieve the above-mentioned purpose, a high-frequency module involved in one embodiment of the present invention comprises: a first power amplifier, which is configured to amplify a signal in a first frequency band; a first low-noise amplifier, which is configured to amplify a signal in a second frequency band; and an IMD suppression circuit, which is connected to the first power amplifier, a second power amplifier capable of amplifying a signal in a third frequency band, and the first low-noise amplifier to generate an IMD suppression signal containing frequency components of intermodulation distortion of the first frequency band and the third frequency band, wherein the signal in the first frequency band, the signal in the second frequency band, and the signal in the third frequency band can be transmitted simultaneously, and the frequency of the intermodulation distortion is included in the second frequency band.

[0011] Effects of the Invention

[0012] According to the present invention, it is possible to provide a high-frequency module and a communication device in which degradation of reception sensitivity due to intermodulation distortion of a plurality of transmission signals is suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a circuit configuration diagram of a high-frequency module and a communication device according to an embodiment.

[0014] Figure 2 This is a schematic diagram showing an example of the frequency relationship between two transmission signals and an unnecessary signal of intermodulation distortion.

[0015] Figure 3 This is a circuit state diagram of the high frequency module according to the embodiment when there are two uplinks and one downlink.

[0016] Figure 4 It is a diagram showing an example of a circuit configuration of an IMD suppression circuit according to an embodiment.

[0017] Figure 5 It is a circuit configuration diagram of a high-frequency module and a communication device according to Modification 1 of the embodiment.

[0018] Figure 6 It is a circuit configuration diagram of a high-frequency module and a communication device according to Modification 2 of the embodiment. DETAILED DESCRIPTION

[0019] Below, the embodiments of the present invention are described in detail. In addition, the embodiments described below all represent general or specific examples. The numerical values, shapes, materials, structural elements, configurations of structural elements, and connection methods shown in the following embodiments are examples, and their purpose is not to limit the present invention. Regarding the structural elements of the following embodiments and modified examples that are not recorded in the independent claims, they are described as arbitrary structural elements. In addition, the size or size ratio of the structural elements shown in the drawings is not necessarily strict. In each figure, the same mark is marked for substantially the same structure, and repeated descriptions are sometimes omitted or simplified.

[0020] In addition, in the present disclosure, terms such as parallel and perpendicular that indicate the relationship between elements, terms such as rectangular that indicate the shape of elements, and numerical ranges refer to substantially equivalent ranges, for example, also including differences of approximately several percent, rather than simply indicating strict meanings.

[0021] In addition, in the present disclosure, "connection" includes not only direct connection using connection terminals and / or wiring conductors, but also electrical connection via other circuit elements. In addition, "connected between A and B" or "connected between A and B" means connection with A and B on the path connecting A and B.

[0022] In the present disclosure, a “path” refers to a transmission line composed of a wiring line through which a high-frequency signal propagates, an electrode directly connected to the wiring line, and a terminal directly connected to the wiring line or the electrode.

[0023] In addition, in the present disclosure, “component A is arranged in series on path B” means that both the signal input terminal and the signal output terminal of component A are connected to wiring, electrodes or terminals constituting path B.

[0024] (Implementation Method)

[0025] [1 Configuration of High Frequency Module 1 and Communication Device 4]

[0026] Reference Figure 1 A circuit configuration of a high-frequency module 1 according to the present embodiment and a communication device 4 including the high-frequency module 1 will be described. Figure 1 It is a circuit configuration diagram of the high-frequency module 1 and the communication device 4 according to the embodiment.

[0027] [1.1 Circuit Configuration of Communication Device 4]

[0028] The communication device 4 corresponds to a so-called user equipment (UE), and is typically a mobile phone, a smartphone, a tablet computer, etc. The communication device 4 includes a high-frequency module 1, antennas 2a and 2b, and an RF signal processing circuit (RFIC: Radio Frequency Integrated Circuit) 3.

[0029] The high-frequency module 1 transmits a high-frequency signal between the antennas 2a and 2b and the RFIC 3. The circuit structure of the high-frequency module 1 will be described later.

[0030] Antenna 2a is connected to antenna connection terminal 101 of high frequency module 1, and antenna 2b is connected to antenna connection terminal 102 of high frequency module 1. Antennas 2a and 2b receive high frequency signals from high frequency module 1 and output them to the outside.

[0031] RFIC 3 is an example of a signal processing circuit that processes a high-frequency signal. Specifically, RFIC 3 performs signal processing on a transmission signal input from a baseband signal processing circuit (BBIC: Baseband Integrated Circuit, not shown) by up-conversion, etc., and outputs the transmission signal generated after the signal processing to the transmission path of the high-frequency module 1. In addition, RFIC 3 performs signal processing on a reception signal input via the reception path of the high-frequency module 1 by down-conversion, etc., and outputs the reception signal generated after the signal processing to the BBIC.

[0032] RFIC 3 outputs control signals for controlling IMD suppression circuit 50 and switch 40 of high frequency module 1 to control circuit 80 of high frequency module 1. In addition, part or all of the control function of RFIC 3 may be configured outside RFIC 3, for example, in BBIC or high frequency module 1.

[0033] In the communication device 4 according to the present embodiment, the antennas 2a and 2b are not essential components. Alternatively, there may be only one antenna.

[0034] [1.2 Circuit structure of high frequency module 1]

[0035] Next, the circuit structure of the high frequency module 1 is described. Figure 1 As shown, the high-frequency module 1 includes power amplifiers 11 and 12, low-noise amplifiers 21 and 22, filters 31, 32, 33 and 34, a switch 40, an IMD suppression circuit 50, a control circuit 80, antenna connection terminals 101 and 102, signal input terminals 111 and 112, signal output terminals 113 and 114, and a control signal terminal 130.

[0036] The antenna connection terminal 101 is an example of a first antenna terminal, and is connected to the antenna 2a. The antenna connection terminal 102 is an example of a second antenna terminal, and is connected to the antenna 2b.

[0037] The signal input terminals 111 and 112 are terminals for receiving transmission signals of, for example, 4G (4th Generation)-LTE (Long Term Evolution) or 5G (5th Generation)-NR (New Radio). The signal input terminal 111 is an example of a first transmission input terminal, and is connected to the input end of the RFIC 3 and the power amplifier 11. The signal input terminal 112 is an example of a second transmission input terminal, and is connected to the input end of the RFIC 3 and the power amplifier 12.

[0038] The signal output terminals 113 and 114 are terminals for outputting reception signals such as 4G-LTE or 5G-NR, respectively. The signal output terminal 113 is an example of the second reception output terminal, and is connected to the output end of the RFIC 3 and the low noise amplifier 21. The signal output terminal 114 is an example of one of the first reception output terminal and the second reception output terminal, and is connected to the output end of the RFIC 3 and the low noise amplifier 22. The signal output terminal 113 is an example of the other of the first reception output terminal and the second reception output terminal, and is connected to the output end of the RFIC 3 and the low noise amplifier 21.

[0039] The power amplifier 11 is an example of a first power amplifier, and can amplify a transmission signal of the first frequency band input from the signal input terminal 111. The power amplifier 11 is arranged in a transmission path 61 (first transmission path) connecting the signal input terminal 111 and the antenna connection terminals 101 and 102.

[0040] The power amplifier 12 is an example of a second power amplifier, and can amplify a transmission signal in the third frequency band input from the signal input terminal 112. The power amplifier 12 is arranged in a transmission path 62 (second transmission path) connecting the signal input terminal 112 and the antenna connection terminals 101 and 102.

[0041] The low noise amplifier 21 is an example of a second low noise amplifier, and can amplify a reception signal of the fourth frequency band input from the antenna connection terminal 101 or 102. The low noise amplifier 21 is arranged in the reception path 71 connecting the signal output terminal 113 and the antenna connection terminals 101 and 102.

[0042] The low noise amplifier 22 is an example of a first low noise amplifier and can amplify a reception signal of the second frequency band input from the antenna connection terminal 101 or 102. The low noise amplifier 22 is arranged in the reception path 72 (first reception path) connecting the signal output terminal 114 and the antenna connection terminals 101 and 102.

[0043] In addition, the amplifier transistors constituting each amplifier in the power amplifiers 11 and 12 and the low noise amplifiers 21 and 22 may be bipolar transistors or MOS field effect transistors (Metal-Oxide-SemiconductorField-Effect-Transistor: Metal-Oxide-Semiconductor Field-Effect-Transistor, MOSFET), etc. In addition, the power amplifiers 11 and 12 may be integrated into one chip, and the low noise amplifiers 21 and 22 may be integrated into one chip.

[0044] In addition, the transmission signal of the first frequency band, the reception signal of the second frequency band, and the transmission signal of the third frequency band can be transmitted simultaneously.

[0045] In addition, the first frequency band, the second frequency band, and the third frequency band are frequency bands for a communication system constructed using a radio access technology (RAT: Radio Access Technology) predefined by a standardization organization, etc. (e.g., 3GPP (registered trademark) and IEEE (Institute of Electrical and Electronics Engineers), etc.) As a communication system, for example, a 5G-NR system, a 4G-LTE system, and a WLAN (Wireless Local Area Network) system can be used, but it is not limited to this.

[0046] The first frequency band and the third frequency band are composed of an uplink operating frequency band for FDD or a frequency band for TDD, and the second frequency band is composed of a downlink operating frequency band for FDD or a frequency band for TDD.

[0047] In addition, the uplink operating frequency band refers to a frequency range designated for uplink use in the frequency band allocated for FDD, and the downlink operating frequency band refers to a frequency range designated for downlink use in the frequency band allocated for FDD.

[0048] The filter 31 is an example of a first filter and has a passband including a first frequency band. The input end of the filter 31 is connected to the output end of the power amplifier 11 , and the output end of the filter 31 is connected to the antenna connection terminal 101 or 102 via the switch 40 .

[0049] The filter 32 has a passband including the fourth frequency band. The input end of the filter 32 is connected to the antenna connection terminal 101 or 102 via the switch 40 , and the output end of the filter 32 is connected to the input end of the low noise amplifier 21 .

[0050] The filter 33 is an example of a third filter and has a passband including the third frequency band. The input end of the filter 33 is connected to the output end of the power amplifier 12 , and the output end of the filter 33 is connected to the antenna connection terminal 101 or 102 via the switch 40 .

[0051] The filter 34 is an example of a second filter and has a passband including the second frequency band. The input end of the filter 34 is connected to the antenna connection terminal 101 or 102 via the switch 40 , and the output end of the filter 34 is connected to the input end of the low noise amplifier 22 .

[0052] The switch 40 is an example of a first switch, and is connected between the antenna connection terminals 101 and 102 and the power amplifiers 11 and 12 and the low noise amplifiers 21 and 22. Specifically, the switch 40 has a first common terminal, a second common terminal, a first selection terminal, and a second selection terminal. The first common terminal is connected to the antenna connection terminal 101, the second common terminal is connected to the antenna connection terminal 102, the first selection terminal is connected to the power amplifier 11 and the low noise amplifier 21 via filters 31 and 32, and the second selection terminal is connected to the power amplifier 12 and the low noise amplifier 22 via filters 33 and 34. According to this connection structure, the switch 40 switches the connection between the antenna connection terminal 101 and the power amplifier 11 and the low noise amplifier 21, and the connection between the antenna connection terminal 101 and the power amplifier 12 and the low noise amplifier 22, and switches the connection between the antenna connection terminal 102 and the power amplifier 11 and the low noise amplifier 21, and the connection between the antenna connection terminal 102 and the power amplifier 12 and the low noise amplifier 22.

[0053] In addition, the switch 40 can also switch the connection and disconnection between the antenna connection terminal 101 and the power amplifier 11 and the low noise amplifier 21, and switch the connection and disconnection between the antenna connection terminal 102 and the power amplifier 11 and the low noise amplifier 21. In other words, the switch 40 can also connect the power amplifier 11 and the low noise amplifier 21 only to the antenna 2a of the antenna 2a and 2b, and connect the power amplifier 12 and the low noise amplifier 22 only to the antenna 2b of the antenna 2a and 2b.

[0054] The IMD suppression circuit 50 is connected to the power amplifiers 11 and 12 and the low noise amplifier 22 to generate an IMD suppression signal including the frequency components of intermodulation distortion (IMD) in the first frequency band and the third frequency band. In addition, the IMD suppression circuit 50 may not be directly connected to the power amplifiers 11 and 12 and the low noise amplifier 22, but may be connected to the transmission paths 61 and 62 and the reception path 72 respectively.

[0055] Furthermore, the frequency of the unwanted signal of intermodulation distortion generated by interference between the transmission signal of the first frequency band amplified by the power amplifier 11 and the transmission signal of the third frequency band amplified by the power amplifier 12 is included in the second frequency band.

[0056] The IMD suppression circuit 50 is input with a transmission signal of a first frequency band propagating in the transmission path 61 and a transmission signal of a third frequency band propagating in the transmission path 62, and generates an IMD suppression signal having a phase opposite to the phase of the above-mentioned unnecessary signal propagating in the receiving path 72 which is the intermodulation distortion of the two transmission signals.

[0057] In the high-frequency module 1, when a transmission signal in the first frequency band (first transmission signal), a transmission signal in the third frequency band (second transmission signal), and a reception signal in the second frequency band are transmitted simultaneously, if the frequency of an unwanted signal of intermodulation distortion generated by interference between the first transmission signal and the second transmission signal is included in the second frequency band, the unwanted signal passes through the filter 34 and propagates in the reception path 72. When the unwanted signal propagated in the reception path 72 is input to the RFIC 3, the reception sensitivity of the reception signal in the second frequency band is deteriorated.

[0058] In view of this situation, in the high frequency module 1, an IMD suppression signal having a phase opposite to that of the above-mentioned unwanted signal is generated in the IMD suppression circuit 50, and the above-mentioned unwanted signal and the IMD suppression signal are synthesized near the connection point between the output terminal 153 and the receiving path 72, so that the unwanted signal propagating in the receiving path 72 can be suppressed. Therefore, the deterioration of the receiving sensitivity caused by the intermodulation distortion between the first transmission signal and the second transmission signal can be suppressed.

[0059] In addition, the IMD suppression signal generated by the IMD suppression circuit 50 and the above-mentioned unwanted signal propagating in the receiving path 72 do not need to have a strict phase inversion relationship, as long as the amplitude of the unwanted signal after being synthesized with the IMD suppression signal near the connection point between the output terminal 153 and the receiving path 72 becomes smaller than the amplitude of the unwanted signal before being synthesized with the IMD suppression signal. To achieve this, the phase difference between the IMD suppression signal and the unwanted signal is about 120° to 180°. In addition, when the above-mentioned phase difference is 170° to 190°, the improvement amount of the unwanted signal is about 20dB, and when the above-mentioned phase difference is 160° to 200°, the improvement amount of the unwanted signal is about 9dB.

[0060] Specifically, the IMD suppression circuit 50 includes input terminals 151 (first terminal) and 152 (second terminal), and an output terminal 153 (third terminal). Figure 1 As shown, the input terminal 151 is connected to the input end of the power amplifier 11 , the input terminal 152 is connected to the input end of the power amplifier 12 , and the output terminal 153 is connected to the output end of the low noise amplifier 22 .

[0061] According to this, the low-noise transmission signal before being amplified by the power amplifiers 11 and 12 is input to the IMD suppression circuit 50, so that a high-precision IMD suppression signal can be generated. In addition, the IMD suppression circuit 50 is connected to the output end of the low-noise amplifier 22, so that the amplitude of the IMD suppression signal can be matched with the amplitude of the unnecessary signal output from the low-noise amplifier 22 with high precision, and the unnecessary signal superimposed on the reception signal output from the high-frequency module 1 can be suppressed with high precision.

[0062] The control circuit 80 controls the IMD suppression circuit 50. The control circuit 80 adjusts the amplitude and phase of the IMD suppression signal generated by the IMD suppression circuit 50 according to the control signal input from the RFIC 3 via the control signal terminal 130. The control signal input from the RFIC 3 includes, for example, information corresponding to a combination of frequency bands transmitted simultaneously, a frequency, and an output power.

[0063] According to this, the high-frequency module 1 can generate the IMD suppression signal of the IMD suppression circuit 50 based on the IMD unwanted signal that changes due to the combination of the frequency bands that are transmitted simultaneously.

[0064] Furthermore, the control circuit 80 may control the switching of the switch 40 in conjunction with the IMD suppression circuit 50 .

[0065] In addition, the output terminal 153 of the IMD suppression circuit 50 may also be connected to the low noise amplifier 21. Accordingly, when the frequency of the unwanted signal of intermodulation distortion generated by the interference between the transmission signal of the first frequency band amplified by the power amplifier 11 and the transmission signal of the third frequency band amplified by the power amplifier 12 is included in the fourth frequency band, the unwanted signal of intermodulation distortion propagating in the reception path 71 can be suppressed by the IMD suppression circuit 50.

[0066] It should be noted that the filters 31 to 34 , the switch 40 , the low-noise amplifier 21 , and the control circuit 80 are not essential components of the high-frequency module 1 according to the present embodiment.

[0067] [1.3 Example of generation of IMD unwanted signal in high frequency module 1]

[0068] Figure 2This is a schematic diagram showing an example of the frequency relationship between two transmission signals and an unwanted signal of intermodulation distortion (IMD). In this figure, the generation of third-order intermodulation distortion (IMD3) is shown when the transmission path 61 in the high-frequency module 1 transmits the first transmission signal of the uplink operating frequency band of Band 3 of 4G-LTE, the transmission path 62 transmits the second transmission signal of the uplink operating frequency band of Band 1 of 4G-LTE, and the reception path 72 transmits the reception signal of the downlink operating frequency band of Band 1 of 4G-LTE (2 uplinks 1 downlink). In other words, Figure 2 The figure shows the generation of third-order intermodulation distortion (IMD3) when the power amplifier 11 in the high-frequency module 1 amplifies the first transmission signal of the uplink operating frequency band of Band 3 of 4G-LTE, the power amplifier 12 amplifies the second transmission signal of the uplink operating frequency band of Band 1 of 4G-LTE, and the low-noise amplifier 22 amplifies the receiving signal of the downlink operating frequency band of Band 1 of 4G-LTE (2 uplink 1 downlink).

[0069] Here, the uplink operating frequency band of Band 3 of 4G-LTE is an example of the first frequency band, the uplink operating frequency band of Band 1 of 4G-LTE is an example of the third frequency band, and the downlink operating frequency band of Band 1 of 4G-LTE is an example of the second frequency band.

[0070] When the strength of the first transmission signal output from the antenna connection terminal 101 is, for example, 20 dBm or more, and the strength of the second transmission signal output from the antenna connection terminal 102 is, for example, 20 dBm or more, the required strength of the first transmission signal at the output of the power amplifier 11 and the required strength of the second transmission signal at the output of the power amplifier 12 are 23 dBm or more. When the first transmission signal and the second transmission signal having the above strengths interfere with each other in each amplifier, each filter, and the switch 40, an unwanted signal of intermodulation distortion is generated. Here, when the frequency of the first transmission signal of Band 3 of 4G-LTE is set to f T1 , set the frequency of the second transmission signal of Band 1 of 4G-LTE to f T2 , Set the frequency of the received signal of Band 1 of 4G-LTE to f R2 Sometimes IMD3(2×f T2 -f T1 ) is included in the frequency of f R2 .

[0071] In addition, the unwanted wave of intermodulation distortion caused by the mutual interference between the first transmission signal transmitted in the transmission path 61 and the second transmission signal transmitted in the transmission path 62 is not limited to the third-order intermodulation distortion, but may be the second-order or fourth-order or higher intermodulation distortion. That is, as the frequency of intermodulation distortion caused by the two transmission signals (T1 and T2), typically, 2f T1 -f T2 , 2f T2 -f T1 、f T1 -f T2 , and f T2 -f T1 , but not limited to, including mf T1 ±nf T2 and mf T2 ±nf T1 (m, n are natural numbers) a specified frequency.

[0072] Figure 3 This is a circuit state diagram of the high frequency module 1 involved in the embodiment when there are 2 uplinks and 1 downlink. This diagram shows the flow of each signal when the first transmission signal amplified by the power amplifier 11, the second transmission signal amplified by the power amplifier 12, and the reception signal amplified by the low noise amplifier 22 are transmitted simultaneously in the high frequency module 1 (2 uplinks and 1 downlink).

[0073] The first transmission signal T1 is output to the antenna 2a via the signal input terminal 111, the power amplifier 11, the filter 31, the switch 40, and the antenna connection terminal 101. In addition, the second transmission signal T2 is output to the antenna 2b via the signal input terminal 112, the power amplifier 12, the filter 33, the switch 40, and the antenna connection terminal 102. In addition, the reception signal R2 is output to the RFIC 3 via the antenna 2b, the antenna connection terminal 102, the switch 40, the filter 34, the low noise amplifier 22, and the signal output terminal 114.

[0074] At this time, the first transmission signal T1 and the second transmission signal T2 interfere with each other in the switch 40 to generate intermodulation distortion. When the frequency of the intermodulation distortion is included in the second frequency band, the unwanted signal of the intermodulation distortion passes through the filter 34 and propagates in the receiving path 72 .

[0075] In view of this situation, in the IMD suppression circuit 50, an IMD suppression signal having a phase opposite to that of the above-mentioned unwanted signal is generated based on information of the first transmission signal T1 input from the transmission path 61 and information of the second transmission signal T2 input from the transmission path 62. The generated IMD suppression signal and the above-mentioned unwanted signal are synthesized near the output terminal 153, so that the unwanted signal propagating in the reception path 72 can be suppressed. Thus, the deterioration of the receiving sensitivity caused by the intermodulation distortion of the first transmission signal T1 and the second transmission signal T2 can be suppressed.

[0076] [1.4 Specific structure of IMD suppression circuit 50]

[0077] Figure 4 1 is a diagram showing an example of a circuit configuration of an IMD suppression circuit 50 according to an embodiment. As shown in the diagram, the IMD suppression circuit 50 includes input terminals 151 and 152, an output terminal 153, amplitude adjustment circuits 51, 52, and 56, phase adjustment circuits 53 and 54, and an IMD signal generation circuit 55.

[0078] The amplitude adjustment circuit 51 is an example of a first amplitude adjustment circuit, and is connected to the input terminal 151. The amplitude adjustment circuit 51 adjusts the amplitude of a portion of the first transmission signal input via the input terminal 151. The amplitude adjustment circuit 52 is an example of a second amplitude adjustment circuit, and is connected to the input terminal 152. The amplitude adjustment circuit 52 adjusts the amplitude of a portion of the second transmission signal input via the input terminal 152.

[0079] The amplitude adjustment circuits 51 and 52 are amplifiers, for example. In addition, the amplitude adjustment circuits 51 and 52 may also be gain-variable amplifiers. Thus, the amplitudes of the signals output from the amplitude adjustment circuits 51 and 52 can be adjusted according to the frequency band combination, frequency, and amplitude of the first transmission signal and the second transmission signal.

[0080] The phase adjustment circuit 53 is an example of a first phase adjustment circuit, and is connected to the output terminal of the amplitude adjustment circuit 51. The phase adjustment circuit 53 adjusts the phase of the signal output from the amplitude adjustment circuit 51. The phase adjustment circuit 54 is an example of a second phase adjustment circuit, and is connected to the output terminal of the amplitude adjustment circuit 52. The phase adjustment circuit 54 adjusts the phase of the signal output from the amplitude adjustment circuit 52.

[0081] The phase adjustment circuits 53 and 54 are, for example, phase shifters. In addition, the phase adjustment circuits 53 and 54 may also be phase-variable phase shifters. Thus, the phases of the signals output from the phase adjustment circuits 53 and 54 can be adjusted according to the frequency band combination, frequency, and amplitude of the first transmission signal and the second transmission signal.

[0082] In addition, the connection order of the amplitude adjustment circuit 51 and the phase adjustment circuit 53 may be reversed. That is, the phase adjustment circuit 53 may be connected to the input terminal 151, and the amplitude adjustment circuit 51 may be connected to the output end of the phase adjustment circuit 53. In addition, the connection order of the amplitude adjustment circuit 52 and the phase adjustment circuit 54 may be reversed. That is, the phase adjustment circuit 54 may be connected to the input terminal 152, and the amplitude adjustment circuit 52 may be connected to the output end of the phase adjustment circuit 54.

[0083] The IMD signal generating circuit 55 is connected to the output ends of the phase adjustment circuits 53 and 54. The IMD signal generating circuit 55 generates an IMD suppression signal including frequency components of intermodulation distortion of the first frequency band and the third frequency band, and having a phase opposite to that of an unwanted signal of intermodulation distortion propagating in the receiving path 72 at the output terminal 153, based on the signal of the first frequency band output from the amplitude adjustment circuit 51 and the phase adjustment circuit 53 and the signal of the third frequency band output from the amplitude adjustment circuit 52 and the phase adjustment circuit 54.

[0084] The IMD signal generating circuit 55 is composed of, for example, a frequency multiplication circuit and a mixer. The frequency multiplication circuit is, for example, respectively disposed at the output terminals of the phase adjustment circuits 53 and 54, and outputs a signal having a frequency multiplied by the frequency of the signal output from the phase adjustment circuits 53 and 54 based on the pattern of the IMD suppression signal to be generated. For example, when generating the above-mentioned IMD3(2×f T2 -f T1 ), the frequency of the signal output from the phase adjustment circuit 53 is doubled, and the frequency of the signal output from the phase adjustment circuit 54 is doubled. The mixer is connected to the output terminals of the two frequency multiplication circuits to generate a signal having a differential frequency (or an added frequency) of the two signals output from the two frequency multiplication circuits. For example, in generating the above-mentioned IMD3 (2×f T2 -f T1 ) frequency, the output signal of the mixer has a frequency of (2×f T2 -f T1 )’s frequency components.

[0085] The amplitude adjustment circuit 56 is an example of a third amplitude adjustment circuit, and is connected between the IMD signal generation circuit 55 and the output terminal 153. The amplitude adjustment circuit 56 adjusts the amplitude of the IMD suppression signal generated by the IMD signal generation circuit 55.

[0086] The amplitude adjustment circuit 56 is, for example, an amplifier. In addition, the amplitude adjustment circuit 56 may also be a gain-variable amplifier. Accordingly, the amplitude of the IMD suppression signal generated by the IMD signal generation circuit 55 can be adjusted according to the frequency band combination, frequency, and amplitude of the first transmission signal and the second transmission signal, so as to suppress the unnecessary signal propagating in the reception path 72.

[0087] In addition, the amplitude adjustment circuit 56 is not an essential component of the IMD suppression circuit 50 .

[0088] [1.5 Circuit Configuration of High-Frequency Module 1A According to Modification 1]

[0089] Figure 5 1 is a circuit diagram of a high-frequency module 1A and a communication device 4A according to a modification example 1 of the embodiment. As shown in the figure, the communication device 4A includes a high-frequency module 1A, antennas 2a and 2b, and an RFIC 3. The communication device 4A according to this modification example is different from the communication device 4 according to the embodiment in that the structure of the high-frequency module 1A is different. Therefore, the structure of the high-frequency module 1A according to this modification example is described below.

[0090] like Figure 5 As shown, the high-frequency module 1A includes power amplifiers 11, 12 and 13, low-noise amplifiers 21, 22, 23, 24, 25 and 26, filters 31, 32, 33, 34, 35, 36, 37, 38 and 39, a switch 40A, an IMD suppression circuit 50A, antenna connection terminals 101 and 102, signal input terminals 111, 112 and 115, and signal output terminals 113, 114, 116, 117, 118 and 119.

[0091] The high-frequency module 1A according to this modification is different from the high-frequency module 1 according to the embodiment in the number of power amplifiers, the number of low-noise amplifiers, and the circuit structure of the IMD suppression circuit 50A. In the following, the high-frequency module 1A according to this modification is described with the structure that is the same as that of the high-frequency module 1 according to the embodiment omitted, and the description will be centered on the different structures. Figure 5 In the high-frequency module 1A shown, the control circuit 80 is not shown, but the control circuit 80 may be arranged similarly to the high-frequency module 1 according to the embodiment.

[0092] Signal input terminals 111, 112, and 115 are terminals for receiving transmission signals such as 4G-LTE or 5G-NR, respectively. Signal input terminal 111 is connected to the input end of RFIC 3 and power amplifier 11. Signal input terminal 112 is connected to the input end of RFIC 3 and power amplifier 12. Signal input terminal 115 is connected to the input end of RFIC 3 and power amplifier 13.

[0093] Signal output terminals 113 to 114 and 116 to 119 are terminals for outputting reception signals such as 4G-LTE or 5G-NR, respectively. Signal output terminal 113 is connected to the output end of RFIC 3 and low noise amplifier 21. Signal output terminal 114 is connected to the output end of RFIC 3 and low noise amplifier 22. Signal output terminal 116 is connected to the output end of RFIC 3 and low noise amplifier 23. Signal output terminal 117 is connected to the output end of RFIC 3 and low noise amplifier 24. Signal output terminal 118 is connected to the output end of RFIC 3 and low noise amplifier 25. Signal output terminal 119 is connected to the output end of RFIC 3 and low noise amplifier 26.

[0094] The power amplifier 11 is an example of a first power amplifier, and can amplify a transmission signal of the first frequency band input from the signal input terminal 111. The power amplifier 11 is arranged in the transmission path 61 (first transmission path) connecting the signal input terminal 111 and the antenna connection terminal 101 or 102.

[0095] The power amplifier 12 is an example of a second power amplifier, and can amplify a transmission signal in the third frequency band input from the signal input terminal 112. The power amplifier 12 is arranged in a transmission path 62 (second transmission path) connecting the signal input terminal 112 and the antenna connection terminal 101 or 102.

[0096] The power amplifier 13 is an example of the third power amplifier and the fourth power amplifier, and can amplify the transmission signal of the fifth frequency band input from the signal input terminal 115. The power amplifier 13 is arranged in the transmission path 63 connecting the signal input terminal 115 and the antenna connection terminal 101 or 102.

[0097] The low noise amplifier 21 is an example of a second low noise amplifier, and can amplify a reception signal of the fourth frequency band input from the antenna connection terminal 101 or 102. The low noise amplifier 21 is arranged in the reception path 71 connecting the signal output terminal 113 and the antenna connection terminal 101 or 102.

[0098] The low noise amplifier 22 is an example of a first low noise amplifier and can amplify a reception signal of the second frequency band input from the antenna connection terminal 101 or 102. The low noise amplifier 22 is arranged in the reception path 72 (first reception path) connecting the signal output terminal 114 and the antenna connection terminal 101 or 102.

[0099] The low noise amplifier 23 can amplify a reception signal in the sixth frequency band input from the antenna connection terminal 101 or 102. The low noise amplifier 23 is disposed in a reception path 73 connecting the signal output terminal 116 and the antenna connection terminal 101 or 102.

[0100] The low noise amplifier 24 can amplify a reception signal in the seventh frequency band input from the antenna connection terminal 101 or 102. The low noise amplifier 24 is arranged in a reception path 74 connecting the signal output terminal 117 and the antenna connection terminal 101 or 102.

[0101] The low noise amplifier 25 can amplify a reception signal in the eighth frequency band input from the antenna connection terminal 101 or 102. The low noise amplifier 25 is arranged in a reception path 75 connecting the signal output terminal 118 and the antenna connection terminal 101 or 102.

[0102] The low noise amplifier 26 can amplify a reception signal of the ninth frequency band input from the antenna connection terminal 101 or 102. The low noise amplifier 26 is arranged in the reception path 76 connecting the signal output terminal 119 and the antenna connection terminal 101 or 102.

[0103] In addition, at least two of the transmission signals in the first frequency band, the third frequency band, and the fifth frequency band can be transmitted simultaneously with at least one of the reception signals in the second frequency band, the fourth frequency band, and the sixth to ninth frequency bands.

[0104] The filter 35 has a passband including the fifth frequency band. The input end of the filter 35 is connected to the output end of the power amplifier 13, and the output end of the filter 35 is connected to the antenna connection terminal 101 or 102 via the switch 40A.

[0105] The filter 36 has a passband including the sixth frequency band. The input end of the filter 36 is connected to the antenna connection terminal 101 or 102 via the switch 40A, and the output end of the filter 36 is connected to the input end of the low noise amplifier 23 .

[0106] The filter 37 has a passband including the seventh frequency band. The input end of the filter 37 is connected to the antenna connection terminal 101 or 102 via the switch 40A, and the output end of the filter 37 is connected to the input end of the low noise amplifier 24 .

[0107] The filter 38 has a passband including the eighth frequency band. The input end of the filter 38 is connected to the antenna connection terminal 101 or 102 via the switch 40A, and the output end of the filter 38 is connected to the input end of the low noise amplifier 25 .

[0108] The filter 39 has a passband including the ninth frequency band. The input end of the filter 39 is connected to the antenna connection terminal 101 or 102 via the switch 40A, and the output end of the filter 39 is connected to the input end of the low noise amplifier 26 .

[0109] In addition, the seventh frequency band may be the same frequency band as the fourth frequency band, the eighth frequency band may be the same frequency band as the second frequency band, and the ninth frequency band may be the same frequency band as the sixth frequency band. In this case, the circuit including the power amplifiers 11, 12, and 13 and the low noise amplifiers 21, 22, and 23 may constitute a main circuit (transmitting and receiving circuit), and the circuit including the low noise amplifiers 24 to 26 may constitute a diversity circuit (receiving circuit).

[0110] The switch 40A is an example of a first switch, and is connected between the antenna connection terminals 101 and 102 and the power amplifiers 11 to 13 and the low noise amplifiers 21 to 26. Specifically, the switch 40A has a first common terminal, a second common terminal, and a first selection terminal to a sixth selection terminal. The first common terminal is connected to the antenna connection terminal 101, the second common terminal is connected to the antenna connection terminal 102, the first selection terminal is connected to the power amplifier 11 and the low noise amplifier 21, the second selection terminal is connected to the power amplifier 12 and the low noise amplifier 22, the third selection terminal is connected to the power amplifier 13 and the low noise amplifier 23, the fourth selection terminal is connected to the low noise amplifier 24, the fifth selection terminal is connected to the low noise amplifier 25, and the sixth selection terminal is connected to the low noise amplifier 26.

[0111] The IMD suppression circuit 50A is connected to the power amplifiers 11, 12, and 13 and the low noise amplifiers 21 to 26, and generates an IMD suppression signal including frequency components of intermodulation distortion (IMD) in two frequency bands among the first frequency band, the third frequency band, and the fifth frequency band. In addition, the IMD suppression circuit 50A may not be directly connected to the power amplifiers 11, 12, and 13 and the low noise amplifiers 21 to 26, but may be connected to the transmission paths 61, 62, and 63 and the reception paths 71 to 76, respectively.

[0112] Furthermore, the frequency of the unwanted signal of intermodulation distortion generated by interference between two of the transmission signals in the first, third and fifth frequency bands amplified by the power amplifiers 11 to 13 is included in one of the second, fourth and sixth to ninth frequency bands.

[0113] The IMD suppression circuit 50A receives two transmission signals among the transmission signals propagating through the transmission paths 61 to 63 and generates an IMD suppression signal having a phase opposite to that of an unwanted signal of intermodulation distortion propagating through the reception paths 71 to 76 which is intermodulation distortion of the two transmission signals.

[0114] The IMD suppression circuit 50A includes input terminals 151 , 152 , 154 , 155 , 156 and 157 , output terminals 153 , 158 , 159 , 160 , 161 and 162 , switches 41 , 42 and 43 , amplitude adjustment circuits 51 , 52 and 56 , phase adjustment circuits 53 and 54 , and an IMD signal generation circuit 55 .

[0115] The input terminal 151 is an example of a first terminal, the input terminal 152 is an example of a second terminal, the input terminal 154 is an example of a fourth terminal, and the input terminal 155 is an example of a fifth terminal.

[0116] Input terminal 151 is connected to power amplifier 11 (and transmission path 61), input terminal 152 is connected to power amplifier 12 (and transmission path 62), input terminal 154 is connected to power amplifier 13 (and transmission path 63), input terminal 155 is connected to power amplifier 13 (and transmission path 63), input terminal 156 is connected to power amplifier 12 (and transmission path 62), and input terminal 157 is connected to power amplifier 11 (and transmission path 61).

[0117] The output terminal 153 is an example of the third terminal, and the output terminal 158 is an example of the sixth terminal.

[0118] Output terminal 153 is connected to the low noise amplifier 22 (and the receiving path 72), output terminal 158 is connected to the low noise amplifier 21 (and the receiving path 71), output terminal 159 is connected to the low noise amplifier 23 (and the receiving path 73), output terminal 160 is connected to the low noise amplifier 24 (and the receiving path 74), output terminal 161 is connected to the low noise amplifier 25 (and the receiving path 75), and output terminal 162 is connected to the low noise amplifier 26 (and the receiving path 76).

[0119] The switch 41 is an example of a second switch, is connected between the input terminals 151 , 154 , and 156 and the amplitude adjustment circuit 51 , and switches the connection between any one of the input terminals 151 , 154 , and 156 and the amplitude adjustment circuit 51 .

[0120] The switch 42 is an example of a third switch, is connected between the input terminals 152 , 155 , and 157 and the amplitude adjustment circuit 52 , and switches the connection between any one of the input terminals 152 , 155 , and 157 and the amplitude adjustment circuit 52 .

[0121] The amplitude adjustment circuit 51 is an example of a first amplitude adjustment circuit, and is connected to the input terminals 151, 154, and 156 via the switch 41. The amplitude adjustment circuit 51 adjusts the amplitude of a part of the transmission signal input via one of the input terminals 151, 154, and 156. The amplitude adjustment circuit 52 is an example of a second amplitude adjustment circuit, and is connected to the input terminals 152, 155, and 157 via the switch 42. The amplitude adjustment circuit 52 adjusts the amplitude of a part of the transmission signal input via one of the input terminals 152, 155, and 157.

[0122] The amplitude adjustment circuits 51 and 52 are, for example, amplifiers. In addition, the amplitude adjustment circuits 51 and 52 may also be gain-variable amplifiers. Thus, the amplitudes of the signals output from the amplitude adjustment circuits 51 and 52 can be adjusted according to the frequency band combination, frequency, and amplitude of the two transmission signals input from the input terminal of the IMD suppression circuit 50A.

[0123] The phase adjustment circuit 53 is an example of a first phase adjustment circuit, and is connected to the output terminal of the amplitude adjustment circuit 51. The phase adjustment circuit 53 adjusts the phase of the signal output from the amplitude adjustment circuit 51. The phase adjustment circuit 54 is an example of a second phase adjustment circuit, and is connected to the output terminal of the amplitude adjustment circuit 52. The phase adjustment circuit 54 adjusts the phase of the signal output from the amplitude adjustment circuit 52.

[0124] The phase adjustment circuits 53 and 54 are, for example, phase shifters. Alternatively, the phase adjustment circuits 53 and 54 may be phase-variable phase shifters. Thus, the phases of the signals output from the phase adjustment circuits 53 and 54 can be adjusted according to the frequency band combination, frequency, and amplitude of the two transmission signals.

[0125] In addition, the connection order of the amplitude adjustment circuit 51 and the phase adjustment circuit 53 may be reversed. That is, the phase adjustment circuit 53 may be connected to the switch 41, and the amplitude adjustment circuit 51 may be connected to the output end of the phase adjustment circuit 53. In addition, the connection order of the amplitude adjustment circuit 52 and the phase adjustment circuit 54 may be reversed. That is, the phase adjustment circuit 54 may be connected to the switch 42, and the amplitude adjustment circuit 52 may be connected to the output end of the phase adjustment circuit 54.

[0126] The IMD signal generating circuit 55 is connected to the output ends of the phase adjustment circuits 53 and 54. The IMD signal generating circuit 55 generates an IMD suppression signal including a frequency component of intermodulation distortion of the two signals and having a phase opposite to that of an unwanted signal of intermodulation distortion propagating in one of the receiving paths 71 to 76 at the output terminals 153 and 158 to 162, based on a signal of one of the first frequency band, the third frequency band, and the fifth frequency band output from the amplitude adjustment circuit 51 and the phase adjustment circuit 53, and a signal of one of the first frequency band, the third frequency band, and the fifth frequency band output from the amplitude adjustment circuit 52 and the phase adjustment circuit 54 and different from the signal output from the amplitude adjustment circuit 51 and the phase adjustment circuit 53.

[0127] The IMD signal generating circuit 55 is composed of, for example, frequency multiplying circuits 57 and 58 and a mixer 59 .

[0128] The amplitude adjustment circuit 56 is an example of a third amplitude adjustment circuit, and is connected between the IMD signal generation circuit 55 and the switch 43. The amplitude adjustment circuit 56 adjusts the amplitude of the IMD suppression signal generated by the IMD signal generation circuit 55.

[0129] The amplitude adjustment circuit 56 is, for example, an amplifier. In addition, the amplitude adjustment circuit 56 may also be a gain-variable amplifier. Accordingly, the IMD suppression signal generated by the IMD signal generation circuit 55 can be adjusted according to the frequency band combination, frequency, and amplitude of the two transmission signals input from the input terminal, so as to suppress the unnecessary signal propagating in one of the reception paths 71 to 76.

[0130] In addition, the amplitude adjustment circuit 56 is not an essential component of the IMD suppression circuit 50A.

[0131] The switch 43 is an example of a fourth switch, and is connected between the output terminals 153 and 158 to 162 and the IMD signal generating circuit 55 (and the amplitude adjusting circuit 56 ), and switches the connection between any one of the output terminals 153 and 158 to 162 and the IMD signal generating circuit 55 (and the amplitude adjusting circuit 56 ).

[0132] According to the above configuration, the IMD suppression circuit 50A generates an IMD suppression signal having a phase different from that of the unwanted signal and including a frequency component of an unwanted signal of intermodulation distortion generated by simultaneous transmission of two of the transmission signals amplified by the power amplifiers 11 to 13 .

[0133] According to the above configuration of the high frequency module 1A, an IMD suppression signal having a phase opposite to that of the above unwanted signal is generated in the IMD suppression circuit 50A, and the above unwanted signal and the IMD suppression signal are synthesized near any of the output terminals 153 and 158 to 162, so that it is possible to suppress the unwanted signal propagating in any of the receiving paths 71 to 76. Therefore, it is possible to suppress the deterioration of the receiving sensitivity due to the intermodulation distortion of two transmission signals having different frequencies.

[0134] The high-frequency module 1A switches the switches 41 to 43 of the IMD suppression circuit 50A according to the IMD unwanted signal that changes due to the combination of simultaneously transmitted frequency bands, thereby making the frequency, amplitude, phase, etc. of the IMD suppression signal of the IMD suppression circuit 50A variable.

[0135] It should be noted that the filters 31 to 39 and the switch 40A are not essential components of the high-frequency module 1A according to the present modification.

[0136] In this case, one of the input terminals 154 and 155 of the IMD suppression circuit 50A may be connected to the power amplifier 13 (third power amplifier), and the other of the input terminals 154 and 155 may be connected to the fourth power amplifier.

[0137] In addition, the input terminals 156 and 157 of the IMD suppression circuit 50A may not exist, and at least two of the output terminals 153 and 158 to 162 may be provided.

[0138] In addition, the high-frequency module 1A does not need to include six low-noise amplifiers, and may only include two or more low-noise amplifiers.

[0139] In addition, the high-frequency module 1A may also include a plurality of IMD suppression circuits. For example, the input terminal of a first IMD suppression circuit among the plurality of IMD suppression circuits is connected to the power amplifiers 11 and 12, and the output terminal is connected to the low-noise amplifier 22. In addition, the input terminal of a second IMD suppression circuit among the plurality of IMD suppression circuits is connected to the power amplifiers 12 and 13, and the output terminal is connected to the low-noise amplifier 23. In addition, the input terminal of a third IMD suppression circuit among the plurality of IMD suppression circuits is connected to the power amplifiers 11 and 13, and the output terminal is connected to the low-noise amplifier 21.

[0140] According to this, the high-frequency module 1A selects the IMD suppression circuit according to the IMD unnecessary signal that changes due to the combination of simultaneously transmitted frequency bands, thereby making the frequency, amplitude, phase, etc. of the IMD suppression signal variable.

[0141] [1.6 Circuit Configuration of High-Frequency Module 1B According to Modification 2]

[0142] Figure 6 1 is a circuit diagram of a high-frequency module 1B and a communication device 4B according to a second variation of the embodiment. As shown in the figure, the communication device 4B includes high-frequency modules 1B and 200, antennas 2a, 2b, 2c and 2d, and RFIC 3. The communication device 4B according to this variation is different from the communication device 4 according to the embodiment in the following aspects: the structure of the high-frequency module 1B is different; and the communication device 4B includes the high-frequency module 1B and 200. The structures of the high-frequency modules 1B and 200 according to this variation are described below.

[0143] like Figure 6 As shown, the high frequency module 1B includes power amplifiers 11 and 12 , low noise amplifiers 21 and 22 , filters 31 , 32 , 33 and 34 , a switch 40 , an IMD suppression circuit 50 , antenna connection terminals 101 and 102 , signal input terminals 111 and 112 , and signal output terminals 113 and 114 .

[0144] The high frequency module 200 also includes power amplifiers 81 and 82 , low noise amplifiers 91 and 92 , filters 95 , 96 , 97 and 98 , a switch 45 , antenna connection terminals 103 and 104 , signal input terminals 181 and 182 , and signal output terminals 183 and 184 .

[0145] The high-frequency module 1B according to this modification is different from the high-frequency module 1 according to the embodiment in the connection structure of the IMD suppression circuit 50. In the following, the high-frequency module 1B according to this modification will be described with the structure that is the same as that of the high-frequency module 1 according to the embodiment omitted, and the description will be centered on the different structures. Figure 6 In the high-frequency module 1B shown, the control circuit 80 is not shown in the figure, but the control circuit 80 may be arranged in the high-frequency module 1B similarly to the high-frequency module 1 according to the embodiment.

[0146] The high-frequency module 200 according to the present modification is different from the high-frequency module 1 according to the embodiment in that it does not include the IMD suppression circuit 50. Hereinafter, the description of the structure of the high-frequency module 200 according to the present modification will be omitted.

[0147] The power amplifier 11 is an example of a first power amplifier, and can amplify a transmission signal of a first frequency band input from a signal input terminal 111. The power amplifier 11 is arranged in a transmission path 61 (first transmission path) connecting the signal input terminal 111 and the antenna connection terminal 101.

[0148] The power amplifier 12 can amplify a transmission signal input from the signal input terminal 112. The power amplifier 12 is arranged in a transmission path 62 connecting the signal input terminal 112 and the antenna connection terminal 102.

[0149] The low noise amplifier 21 is an example of a second low noise amplifier, and can amplify a reception signal in the fourth frequency band input from the antenna connection terminal 101 or 102. The low noise amplifier 21 is arranged in the reception path 71 connecting the signal output terminal 113 and the antenna connection terminal 101.

[0150] The low noise amplifier 22 is an example of a first low noise amplifier, and can amplify a reception signal of the second frequency band input from the antenna connection terminal 101 or 102. The low noise amplifier 22 is arranged in the reception path 72 (first reception path) connecting the signal output terminal 114 and the antenna connection terminal 102.

[0151] The power amplifier 81 can amplify the transmission signal input from the signal input terminal 181. The power amplifier 81 is arranged in the transmission path 65 connecting the signal input terminal 181 and the antenna connection terminal 103.

[0152] The power amplifier 82 is an example of a second power amplifier, and can amplify a transmission signal in the third frequency band input from the signal input terminal 182. The power amplifier 12 is arranged in the transmission path 66 (second transmission path) connecting the signal input terminal 182 and the antenna connection terminal 104.

[0153] The low noise amplifier 91 can amplify a reception signal input from the antenna connection terminal 103 or 104. The low noise amplifier 91 is arranged in the reception path 77 connecting the signal output terminal 183 and the antenna connection terminal 103.

[0154] The low noise amplifier 92 can amplify a reception signal input from the antenna connection terminal 103 or 104. The low noise amplifier 92 is arranged in the reception path 78 connecting the signal output terminal 184 and the antenna connection terminal 104.

[0155] In addition, the transmission signal of the first frequency band transmitted in the high frequency module 1B, the reception signal of the second frequency band transmitted in the high frequency module 1B, and the transmission signal of the third frequency band transmitted in the high frequency module 200 can be transmitted simultaneously.

[0156] The IMD suppression circuit 50 is connected to the power amplifiers 11 and 82 and the low noise amplifier 22, and generates an IMD suppression signal including the frequency components of the intermodulation distortion (IMD) of the first frequency band and the third frequency band. In addition, the IMD suppression circuit 50 may not be directly connected to the power amplifiers 11 and 82 and the low noise amplifier 22, but may be connected to the transmission paths 61 and 66 and the reception path 72, respectively. Specifically, the IMD suppression circuit 50 includes input terminals 151 (first terminal) and 152 (second terminal), and an output terminal 153 (third terminal). The input terminal 151 is connected to the input end of the power amplifier 11, the input terminal 152 is connected to the input end of the power amplifier 82 via the external connection terminal 120, and the output terminal 153 is connected to the output end of the low noise amplifier 22. That is, the IMD suppression circuit 50 involved in this modification is connected to the power amplifier 11 of the high frequency module 1B and the power amplifier 82 of the high frequency module 200.

[0157] Furthermore, the frequency of the unwanted signal of the intermodulation distortion generated by the interference between the transmission signal of the first frequency band amplified by the power amplifier 11 and the transmission signal of the third frequency band amplified by the power amplifier 82 is included in the second frequency band.

[0158] The IMD suppression circuit 50 is input with a transmission signal of a first frequency band propagating in the transmission path 61 and a transmission signal of a third frequency band propagating in the transmission path 66, and generates an IMD suppression signal having a phase opposite to the phase of the above-mentioned unnecessary signal propagating in the receiving path 72 which is the intermodulation distortion of the two transmission signals.

[0159] According to the above configuration, in the high frequency module 1B, an IMD suppression signal having a phase opposite to that of the unwanted signal is generated in the IMD suppression circuit 50, and the unwanted signal and the IMD suppression signal are combined near the output terminal 153, thereby suppressing the unwanted signal propagating in the reception path 72. Therefore, it is possible to suppress the deterioration of the reception sensitivity due to the intermodulation distortion between the first transmission signal and the second transmission signal.

[0160] In the high-frequency module 1B, the filters 31 to 34 , the switch 40 , the power amplifier 12 , and the low-noise amplifier 21 are not essential components of the high-frequency module 1B according to the present modification.

[0161] Furthermore, the communication device 4B according to the present modification may not include the high-frequency module 200 and the antennas 2 c and 2 d .

[0162] [2. Effects, etc.]

[0163] As described above, the high-frequency module 1 involved in the present embodiment and the high-frequency module 1B involved in the variant 2 include: a power amplifier 11, which is configured to amplify a signal in a first frequency band; a low-noise amplifier 22, which is configured to amplify a signal in a second frequency band; and an IMD suppression circuit 50, which is connected to the power amplifier 11, the power amplifier 12 configured to amplify a signal in a third frequency band, and the low-noise amplifier 22, to generate an IMD suppression signal including frequency components of intermodulation distortion of the first frequency band and the third frequency band, wherein the signal in the first frequency band, the signal in the second frequency band, and the signal in the third frequency band can be transmitted simultaneously, and the frequency of the above-mentioned intermodulation distortion is included in the second frequency band.

[0164] According to this, the IMD suppression signal generated by the IMD suppression circuit 50 can suppress the unwanted signal of the intermodulation distortion between the first transmission signal in the first frequency band and the second transmission signal in the third frequency band passing through the low noise amplifier 22. Therefore, the deterioration of the receiving sensitivity caused by the intermodulation distortion between the first transmission signal and the second transmission signal can be suppressed.

[0165] For example, in the high-frequency modules 1 and 1B, the IMD suppression circuit 50 may be connected to the input terminal of the power amplifier 11 , the input terminal of the power amplifier 12 , and the output terminal of the low-noise amplifier 22 .

[0166] Accordingly, the low-noise transmission signal before being amplified by the power amplifiers 11 and 12 is input to the IMD suppression circuit 50, so that a high-precision IMD suppression signal can be generated. In addition, the IMD suppression circuit 50 is connected to the output end of the low-noise amplifier 22, so that unnecessary signals superimposed on the receiving signal output from the high-frequency module 1 can be suppressed with high precision.

[0167] In addition, for example, the high-frequency module 1 may also further include a power amplifier 12, antenna connection terminals 101 and 102, signal input terminals 111 and 112, and a signal output terminal 114, the power amplifier 11 is configured in the transmission path 61 connecting the signal input terminal 111 and the antenna connection terminal 101, the power amplifier 12 is configured in the transmission path 62 connecting the signal input terminal 112 and the antenna connection terminal 102, the low-noise amplifier 22 is configured in the receiving path 72 connecting the signal output terminal 114 and the antenna connection terminal 101 or 102, and the IMD suppression circuit 50 is connected to the transmission paths 61 and 62 and the receiving path 72 to generate an IMD suppression signal that includes the frequency component of the unwanted signal of the above-mentioned intermodulation distortion and has a phase different from the phase of the above-mentioned unwanted signal propagating in the receiving path 72.

[0168] According to this, in the high frequency module 1, an IMD suppression signal having a phase opposite to that of the above-mentioned unwanted signal is generated in the IMD suppression circuit 50, and the above-mentioned unwanted signal and the IMD suppression signal are synthesized near the connection point between the IMD suppression circuit 50 and the receiving path 72, so that the unwanted signal propagating in the receiving path 72 can be suppressed. Therefore, the deterioration of the receiving sensitivity due to the intermodulation distortion between the first transmission signal and the second transmission signal can be suppressed.

[0169] In addition, for example, the high-frequency module 1 may also include: a filter 31, which is connected between the antenna connection terminal 101 and the power amplifier 11, and the passband of the filter 31 includes the first frequency band; a filter 34, which is connected between the antenna connection terminal 101 or 102 and the low-noise amplifier 22, and the passband of the filter 34 includes the second frequency band; and a filter 33, which is connected between the antenna connection terminal 102 and the power amplifier 12, and the passband of the filter 33 includes the third frequency band.

[0170] According to this, it is possible to reduce noise of the first transmission signal transmitted through the transmission path 61 , the second transmission signal transmitted through the transmission path 62 , and the reception signal transmitted through the reception path 72 .

[0171] For example, the high frequency module 1 may further include a switch 40 connected between the antenna connection terminals 101 and 102 and the power amplifiers 11 and 12 and the low noise amplifier 22 .

[0172] Thus, the connection between the antenna connection terminals 101 and 102 and the power amplifiers 11 and 12 and the low noise amplifier 22 can be switched depending on whether the signal of the first frequency band, the signal of the second frequency band, or the signal of the third frequency band is transmitted.

[0173] In addition, for example, in the high-frequency modules 1 and 1B, the IMD suppression circuit 50 may have an input terminal 151 connected to the power amplifier 11, an input terminal 152 connected to the power amplifier 12, and an output terminal 153 connected to the low-noise amplifier 22, and the IMD suppression circuit 50 includes: an amplitude adjustment circuit 51 connected to the input terminal 151; an amplitude adjustment circuit 52 connected to the input terminal 152; a phase adjustment circuit 53 connected to the amplitude adjustment circuit 51; a phase adjustment circuit 54 connected to the amplitude adjustment circuit 52; and an IMD signal generating circuit 55 connected to the phase adjustment circuits 53 and 54 to generate an IMD suppression signal.

[0174] According to this, the IMD suppression circuit 50 can generate the IMD suppression signal according to the power amplitude and phase of the first transmission signal and the second transmission signal.

[0175] For example, in the high-frequency module 1A involved in the modification example 1, the IMD suppression circuit 50A may further include: input terminals 154 and 155; a switch 41, which is connected between the input terminals 151 and 154 and the amplitude adjustment circuit 51, and switches the connection between the input terminal 151 and the amplitude adjustment circuit 51 and the connection between the input terminal 154 and the amplitude adjustment circuit 51; and a switch 42, which is connected between the input terminals 152 and 155 and the amplitude adjustment circuit 52, and switches the connection between the input terminal 152 and the amplitude adjustment circuit 52 and the connection between the input terminal 155 and the amplitude adjustment circuit 52, and the input terminal 154 is connected to the power amplifier 13, and the input terminal 155 is connected to the power amplifier 13. Here, the IMD suppression circuit 50A can also generate an IMD suppression signal that includes the frequency components of unnecessary signals of intermodulation distortion generated by the simultaneous transmission of two transmission signals, namely, a first transmission signal amplified by the power amplifier 11, a second transmission signal amplified by the power amplifier 12, and a third transmission signal amplified by the power amplifier 13.

[0176] According to this, in the IMD suppression circuit 50A, the transmission path connected to the IMD suppression circuit 50A can be selected by switching the switches 41 and 42 , and thus an IMD suppression signal corresponding to the combination of signals of two frequency bands that are transmitted simultaneously can be generated.

[0177] In addition, for example, the high-frequency module 1A involved in variant example 1 may also further include a low-noise amplifier 21, and the IMD suppression circuit 50A further includes: an output terminal 158; and a switch 43, which is connected between the output terminals 153 and 158 and the IMD signal generating circuit 55, and switches the connection between the output terminal 153 and the IMD signal generating circuit 55 and the connection between the output terminal 158 and the IMD signal generating circuit 55, the output terminal 158 is connected to the low-noise amplifier 21, and the IMD suppression circuit 50A generates an IMD suppression signal that includes the frequency component of the unwanted signal of the intermodulation distortion propagating in the low-noise amplifier 21 or 22, and the phase of which is different from the phase of the above-mentioned unwanted signal.

[0178] According to this, the IMD suppression circuit 50A generates an IMD suppression signal based on the combination of the signals of the two frequency bands transmitted simultaneously, and the above-mentioned unwanted signal and the IMD suppression signal are synthesized near one of the output terminals 153 and 158 by switching the switch 43, so that the unwanted signal propagating in one of the reception paths 71 and 72 can be suppressed. Therefore, the deterioration of the reception sensitivity caused by the intermodulation distortion of the two transmission signals with different frequencies can be suppressed.

[0179] For example, in the high-frequency modules 1 , 1A, and 1B, the IMD suppression circuit 50 (or 50A) may further include an amplitude adjustment circuit 56 connected between the IMD signal generation circuit 55 and the output terminal 153 .

[0180] Accordingly, the amplitude of the IMD suppression signal generated by the IMD signal generating circuit 55 can be adjusted according to the frequency band combination, frequency and amplitude of the two transmission signals input from the above-mentioned input terminals, so as to suppress the unnecessary signal propagating in any of the above-mentioned receiving paths.

[0181] For example, the high-frequency modules 1 , 1A, and 1B may further include a control circuit 80 that controls the IMD suppression circuit 50 (or 50A).

[0182] According to this, the control circuit 80 outputs a control signal to the IMD suppression circuit 50 (or 50A) based on information such as a combination of frequency bands to be transmitted simultaneously, and thus an IMD suppression signal can be generated with high accuracy.

[0183] Furthermore, the communication device 4 according to the present embodiment includes: a high-frequency module 1 ; and an RFIC 3 that processes a high-frequency signal transmitted and received by the high-frequency module 1 .

[0184] According to this, the effect of the high-frequency module 1 can be achieved by the communication device 4 .

[0185] (Other Embodiments)

[0186] In the above, the high-frequency module and the communication device involved in the embodiment are described by enumerating the embodiment and the modified example, but the high-frequency module and the communication device involved in the present invention are not limited to the above-mentioned embodiment and the modified example. Other embodiments implemented by combining any structural elements in the above-mentioned embodiment and the modified example, the modified example obtained by implementing various modifications that can be thought of by those skilled in the art without departing from the scope of the purpose of the present invention to the above-mentioned embodiment and the modified example, and various devices with the above-mentioned high-frequency module and the communication device built in are also included in the present invention.

[0187] For example, in the high-frequency modules and communication devices according to the above-described embodiments and modifications, other circuit elements, wirings, etc. may be inserted between paths connecting the circuit elements and signal paths disclosed in the drawings.

[0188] In addition, in the above-mentioned embodiment and its variation, the structure of the case where two different frequency bands are used simultaneously is exemplified, but the structure of the high-frequency module and the communication device involved in the present invention can also be applied to the structure where three or more different frequency bands are used simultaneously. In other words, the high-frequency module or communication device including the structure of the high-frequency module or communication device involved in the above-mentioned embodiment and its variation as a structure using three or more different frequency bands simultaneously is also included in the present invention.

[0189] Next, features of the high-frequency module and the communication device described based on the above-mentioned embodiment and modified examples will be described.

[0190] <1>

[0191] A high frequency module, comprising:

[0192] A first power amplifier configured to amplify a signal in a first frequency band;

[0193] a first low noise amplifier configured to amplify a signal in a second frequency band; and

[0194] The intermodulation distortion suppression circuit is an IMD suppression circuit, which is connected to the first power amplifier, the second power amplifier capable of amplifying the signal of the third frequency band, and the first low noise amplifier, and generates an IMD suppression signal containing the frequency components of the intermodulation distortion of the first frequency band and the third frequency band.

[0195] The signal of the first frequency band, the signal of the second frequency band and the signal of the third frequency band can be transmitted simultaneously.

[0196] The frequency of the intermodulation distortion is included in the second frequency band.

[0197] <2>

[0198] according to <1> The high frequency module, wherein:

[0199] The IMD suppression circuit is connected to an input end of the first power amplifier, an input end of the second power amplifier, and an output end of the first low noise amplifier.

[0200] <3>

[0201] according to <1> or <2> The high frequency module further comprises:

[0202] the second power amplifier; and

[0203] a first antenna terminal, a second antenna terminal, a first transmission input terminal, a second transmission input terminal, and a first reception output terminal,

[0204] The first power amplifier is arranged in a first transmission path connecting the first transmission input terminal and the first antenna terminal.

[0205] The second power amplifier is arranged in a second transmission path connecting the second transmission input terminal and the second antenna terminal.

[0206] The first low noise amplifier is arranged in a first receiving path connecting the first receiving output terminal and the first antenna terminal or the second antenna terminal.

[0207] The IMD suppression circuit is connected to the first transmission path, the second transmission path, and the first reception path, and generates the IMD suppression signal including the frequency component of the intermodulation distortion and having a phase different from a phase of an unwanted signal of the intermodulation distortion propagating in the first reception path.

[0208] <4>

[0209] according to <3> The high frequency module further comprises:

[0210] A first filter connected between the first antenna terminal and the first power amplifier, wherein a passband of the first filter includes the first frequency band;

[0211] a second filter connected between the first antenna terminal or the second antenna terminal and the first low noise amplifier, wherein a passband of the second filter includes the second frequency band; and

[0212] A third filter is connected between the second antenna terminal and the second power amplifier, and a passband of the third filter includes the third frequency band.

[0213] <5>

[0214] according to <3> or <4> The high frequency module, wherein:

[0215] The device further includes a first switch connected between the first antenna terminal and the second antenna terminal and the first power amplifier, the second power amplifier, and the first low-noise amplifier.

[0216] <6>

[0217] according to <1> ~ <5> The high-frequency module described in any one of the above, wherein:

[0218] The IMD suppression circuit has a first terminal connected to the first power amplifier, a second terminal connected to the second power amplifier, and a third terminal connected to the first low noise amplifier.

[0219] The IMD suppression circuit has:

[0220] A first amplitude adjustment circuit connected to the first terminal;

[0221] a second amplitude adjustment circuit connected to the second terminal;

[0222] A first phase adjustment circuit connected to the first amplitude adjustment circuit;

[0223] a second phase adjustment circuit connected to the second amplitude adjustment circuit; and

[0224] The IMD signal generating circuit is connected to the first phase adjusting circuit and the second phase adjusting circuit to generate the IMD suppression signal.

[0225] <7> according to <6> The high frequency module, wherein:

[0226] The IMD suppression circuit further comprises:

[0227] a fourth terminal and a fifth terminal;

[0228] a second switch connected between the first terminal and the fourth terminal and the first amplitude adjustment circuit, and switching a connection between the first terminal and the first amplitude adjustment circuit and a connection between the fourth terminal and the first amplitude adjustment circuit; and

[0229] a third switch connected between the second terminal and the fifth terminal and the second amplitude adjustment circuit, and switching the connection between the second terminal and the second amplitude adjustment circuit and the connection between the fifth terminal and the second amplitude adjustment circuit;

[0230] The fourth terminal is connected to the third power amplifier,

[0231] The fifth terminal is connected to the fourth power amplifier,

[0232] The IMD suppression circuit generates an IMD suppression signal including frequency components of unwanted signals of intermodulation distortion generated by simultaneous transmission of two transmission signals, namely, a first transmission signal amplified by the first power amplifier, a second transmission signal amplified by the second power amplifier, a third transmission signal amplified by the third power amplifier, and a fourth transmission signal amplified by the fourth power amplifier.

[0233] <8>

[0234] according to <6> or <7> The high frequency module, wherein:

[0235] It also has a second low noise amplifier,

[0236] The IMD suppression circuit further comprises:

[0237] a sixth terminal; and

[0238] a fourth switch connected between the third terminal and the sixth terminal and the IMD signal generating circuit, and switching the connection between the third terminal and the IMD signal generating circuit and the connection between the sixth terminal and the IMD signal generating circuit,

[0239] The sixth terminal is connected to the second low noise amplifier,

[0240] The IMD suppression circuit generates an IMD suppression signal that contains a frequency component of an unwanted signal of intermodulation distortion propagating through the first low noise amplifier or the second low noise amplifier and has a phase different from a phase of the unwanted signal.

[0241] <9>

[0242] according to <6> ~ <8> The high-frequency module described in any one of the above, wherein:

[0243] The IMD suppression circuit further includes a third amplitude adjustment circuit connected between the IMD signal generation circuit and the third terminal.

[0244] <10>

[0245] according to <1> ~ <9> The high-frequency module described in any one of the above, wherein:

[0246] A control circuit for controlling the IMD suppression circuit is further provided.

[0247] <11>

[0248] A communication device, comprising:

[0249] according to <1> ~ <10> The high frequency module described in any one of the above; and

[0250] The radio frequency signal processing circuit is an RF signal processing circuit, which processes the high frequency signal sent or received by the high frequency module.

[0251] Industrial Applicability

[0252] The present invention can be widely used in communication devices such as mobile phones as a front-end module supporting multi-band / multi-mode using CA (Carrier Aggregation) or ENDC (Eutra NR Dual Connectivity).

[0253] Description of Reference Numerals

[0254] 1, 1A, 1B, 200: high frequency module; 2a, 2b, 2c, 2d: antenna; 3: RF signal processing circuit (RFIC); 4, 4A, 4B: communication device; 11, 12, 13, 81, 82: power amplifier; 21, 22, 23, 24, 25, 26, 91, 92: low noise amplifier; 31, 32, 33, 34, 35, 36, 37, 38, 39, 95, 96, 97, 98: filter; 40, 40A, 41, 42, 43, 45: switch; 50, 50A: IMD suppression circuit; 51, 52, 56: amplitude adjustment circuit; 53, 54: phase adjustment circuit; 55: IMD signal generation circuit; 57, 5 8: frequency multiplication circuit; 59: mixer; 61, 62, 63, 65, 66: transmission path; 71, 72, 73, 74, 75, 76, 77, 78: reception path; 80: control circuit; 101, 102, 103, 104: antenna connection terminals; 111, 112, 115, 181, 182: signal input terminals; 113, 114, 116, 117, 118, 119, 183, 184: signal output terminals; 120: external connection terminal; 130: control signal terminal; 151, 152, 154, 155, 156, 157: input terminals; 153, 158, 159, 160, 161, 162: output terminals.

Claims

1. A high frequency module, comprising: A first power amplifier configured to amplify a signal in a first frequency band; a first low noise amplifier configured to amplify a signal in a second frequency band; and The intermodulation distortion suppression circuit is an IMD suppression circuit, which is connected to the first power amplifier, the second power amplifier capable of amplifying the signal of the third frequency band, and the first low noise amplifier, and generates an IMD suppression signal containing the frequency components of the intermodulation distortion of the first frequency band and the third frequency band. in, The signal of the first frequency band, the signal of the second frequency band and the signal of the third frequency band can be transmitted simultaneously, The frequency of the intermodulation distortion is included in the second frequency band.

2. The high frequency module according to claim 1, wherein: The IMD suppression circuit is connected to an input end of the first power amplifier, an input end of the second power amplifier, and an output end of the first low noise amplifier.

3. The high frequency module according to claim 1 or 2, wherein: Also available: the second power amplifier; and a first antenna terminal, a second antenna terminal, a first transmission input terminal, a second transmission input terminal, and a first reception output terminal, The first power amplifier is arranged in a first transmission path connecting the first transmission input terminal and the first antenna terminal. The second power amplifier is arranged in a second transmission path connecting the second transmission input terminal and the second antenna terminal. The first low noise amplifier is arranged in a first receiving path connecting the first receiving output terminal and the first antenna terminal or the second antenna terminal. The IMD suppression circuit is connected to the first transmission path, the second transmission path, and the first reception path, and generates the IMD suppression signal including the frequency component of the intermodulation distortion and having a phase different from a phase of an unwanted signal of the intermodulation distortion propagating in the first reception path.

4. The high frequency module according to claim 3, wherein: Also available: A first filter connected between the first antenna terminal and the first power amplifier, wherein a passband of the first filter includes the first frequency band; A second filter connected between the first antenna terminal or the second antenna terminal and the first low noise amplifier, wherein a passband of the second filter includes the second frequency band; as well as A third filter is connected between the second antenna terminal and the second power amplifier, and a passband of the third filter includes the third frequency band.

5. The high frequency module according to claim 3 or 4, wherein: The device further includes a first switch connected between the first antenna terminal and the second antenna terminal and the first power amplifier, the second power amplifier, and the first low-noise amplifier.

6. The high frequency module according to any one of claims 1 to 5, wherein: The IMD suppression circuit has a first terminal connected to the first power amplifier, a second terminal connected to the second power amplifier, and a third terminal connected to the first low noise amplifier. The IMD suppression circuit has: A first amplitude adjustment circuit connected to the first terminal; a second amplitude adjustment circuit connected to the second terminal; A first phase adjustment circuit connected to the first amplitude adjustment circuit; a second phase adjustment circuit connected to the second amplitude adjustment circuit; and The IMD signal generating circuit is connected to the first phase adjusting circuit and the second phase adjusting circuit to generate the IMD suppression signal.

7. The high frequency module according to claim 6, wherein: The IMD suppression circuit further comprises: a fourth terminal and a fifth terminal; a second switch connected between the first terminal and the fourth terminal and the first amplitude adjustment circuit, and switching the connection between the first terminal and the first amplitude adjustment circuit and the connection between the fourth terminal and the first amplitude adjustment circuit; as well as a third switch connected between the second terminal and the fifth terminal and the second amplitude adjustment circuit, and switching the connection between the second terminal and the second amplitude adjustment circuit and the connection between the fifth terminal and the second amplitude adjustment circuit; The fourth terminal is connected to the third power amplifier, The fifth terminal is connected to the fourth power amplifier, The IMD suppression circuit generates an IMD suppression signal including frequency components of unwanted signals of intermodulation distortion generated by simultaneous transmission of two transmission signals, namely, a first transmission signal amplified by the first power amplifier, a second transmission signal amplified by the second power amplifier, a third transmission signal amplified by the third power amplifier, and a fourth transmission signal amplified by the fourth power amplifier.

8. The high frequency module according to claim 6 or 7, wherein: It also has a second low noise amplifier, The IMD suppression circuit further comprises: a sixth terminal; and a fourth switch connected between the third terminal and the sixth terminal and the IMD signal generating circuit, and switching the connection between the third terminal and the IMD signal generating circuit and the connection between the sixth terminal and the IMD signal generating circuit, The sixth terminal is connected to the second low noise amplifier, The IMD suppression circuit generates an IMD suppression signal that contains a frequency component of an unwanted signal of intermodulation distortion propagating through the first low noise amplifier or the second low noise amplifier and has a phase different from a phase of the unwanted signal.

9. The high frequency module according to any one of claims 6 to 8, wherein: The IMD suppression circuit further includes a third amplitude adjustment circuit connected between the IMD signal generation circuit and the third terminal.

10. The high frequency module according to any one of claims 1 to 9, wherein: A control circuit for controlling the IMD suppression circuit is further provided.

11. A communication device comprising: The high frequency module according to any one of claims 1 to 10; and The radio frequency signal processing circuit is an RF signal processing circuit, which processes the high frequency signal sent or received by the high frequency module.

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