Power amplification module

Abstract

The present application provides a power amplification module, which aims to properly combine a wideband signal while reducing the module. The power amplification module comprises: a first amplifier, which amplifies the power level of a first input signal of a given frequency band and outputs a first signal of a first power level; a first impedance converter connected with the first amplifier and comprising a transmission line transformer; a second amplifier, which amplifies the power level of a second input signal of the given frequency band and outputs a second signal of the first power level; a second impedance converter connected with the second amplifier and comprising a transmission line transformer; and a combiner, which combines the first signal input through the first impedance converter and the second signal input through the second impedance converter into an output signal of a second power level greater than the first power level, and comprises a transmission line transformer.

Description

Technical Field

[0001] This disclosure relates to power amplifier modules. Background Technology

[0002] In recent years, portable terminals have employed devices with multiple frequency bands specified by 3GPP (Third Generation Partnership Project) for their RF (Radio Frequency) front-end circuits. Furthermore, due to the requirement for high-speed communication, multi-band operation using multiple frequency bands simultaneously has been adopted. Therefore, a technique has been disclosed that combines signals amplified separately by dual-system amplifiers to generate a signal according to a desired communication standard (see Patent Document 1).

[0003] Prior art literature

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2016-42699

[0006] Patent Document 2: WO2015 / 133003A1

[0007] The front-end circuit described in Patent Document 1 combines the 3G / 4G signals of the dual systems using a power combiner that includes a matching circuit and a frequency band selection switch, and then outputs a 2G signal through an impedance transformation circuit. However, in this front-end circuit, an LC ladder circuit is used for the matching circuit, which presents the problem of not being able to achieve widebandwidth.

[0008] Furthermore, Patent Document 2 discloses an amplifier circuit for synthesizing amplified signals. The amplifier circuit described in Patent Document 2 synthesizes the respective signals and generates an output signal using quarter-wavelength lines separately arranged in the dual system. However, in the amplifier circuit described in Patent Document 2, output matching is performed using quarter-wavelength lines with optimal line lengths varying according to frequency, making widebanding difficult. That is, this amplifier circuit suffers from the problem of not being able to synthesize wideband signals. Furthermore, the quarter-wavelength lines occupy a large circuit area, resulting in a larger module size. Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] Therefore, the purpose of this disclosure is to appropriately synthesize wideband signals while miniaturizing the module.

[0011] Methods for solving problems

[0012] One aspect of the present invention relates to a power amplifier module comprising: a first amplifier for amplifying a power level of a first input signal in a given frequency band and outputting a first signal of a first power level; a first impedance transformer connected to the first amplifier and including a transmission line transformer; a second amplifier for amplifying a power level of a second input signal in the given frequency band and outputting a second signal of the first power level; a second impedance transformer connected to the second amplifier and including a transmission line transformer; and a synthesizer for combining the first signal input through the first impedance transformer and the second signal input through the second impedance transformer into an output signal of a second power level greater than the first power level, including a transmission line transformer.

[0013] Invention Effects

[0014] According to this disclosure, a power amplifier module that can appropriately synthesize a wideband signal while miniaturizing the module can be provided. Attached Figure Description

[0015] Figure 1 This is a diagram showing a general outline of the structure of the power amplifier module according to this embodiment.

[0016] Figure 2 This is a diagram illustrating an example of the structure of the power amplifier module according to this embodiment.

[0017] Figure 3A This is a simplified diagram illustrating an example of a transmission line transformer.

[0018] Figure 3B This is a perspective view that simplifies the construction of a transmission line transformer.

[0019] Figure 3C This is a perspective view that simplifies the construction of a transmission line transformer.

[0020] Figure 4 This is a diagram showing an example of the structure of a synthesizer of the first type.

[0021] Figure 5 This is a diagram showing an example of the structure of a synthesizer of the second type.

[0022] Figure 6 This is a diagram illustrating a structural example of the synthesizer of the third method.

[0023] Figure 7 This is a diagram showing an example of the structure of a synthesizer in the fourth manner.

[0024] Figure 8 This is a diagram showing a structural example of the synthesizer of the fifth method.

[0025] Figure 9A This is a diagram illustrating a schematic of the structure of a power amplifier module according to other embodiments.

[0026] Figure 9B This is a diagram illustrating a schematic of the structure of a power amplifier module according to other embodiments.

[0027] Figure 10 This is a diagram showing a general outline of the structure of the power amplifier module involved in the comparative example.

[0028] Explanation of reference numerals in the attached figures

[0029] 100, 200… power amplifier module, 110a… first amplifier, 120a… first impedance transformer, 110b… second amplifier, 120b… second impedance transformer, 180… synthesizer, 160… antenna switch, 140a, 140b… band selection switch, 150… duplexer. Detailed Implementation

[0030] Hereinafter, various embodiments of the present disclosure will be described with reference to the accompanying drawings. Here, circuit elements referred to by the same reference numerals are used to denote the same circuit element, and repeated descriptions are omitted.

[0031] ===Structure of Power Amplifier Module 100===

[0032] Reference Figure 1 An overview of the power amplifier module 100 involved in this embodiment will be described. Figure 1This diagram illustrates a schematic of the structure of the power amplifier module 100 according to this embodiment. The power amplifier module 100, for example, is mounted in a mobile communication device such as a portable telephone, amplifies the power of the input signal RFin to the level required for transmission to a base station, and outputs it as an amplified signal RFout. The input signal RFin is, for example, a radio frequency (RF) signal modulated by an RFIC (Radio Frequency Integrated Circuit) or the like according to a given communication method. The communication standard of the input signal RFin includes, for example, 2G (2nd generation mobile communication system), 3G (3rd generation mobile communication system), 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 5GNR (New Radio), LTE (Long Term Evolution)-FDD (Frequency Division Duplex), LTE-TDD (Time Division Duplex), LTE-Advanced, or LTE-Advanced Pro, with frequencies ranging from hundreds of MHz to tens of GHz. However, the communication standard and frequency of the input signal RFin are not limited to these.

[0033] For example, mobile terminals using downlink MIMO (Multiple-Input and Multiple-Output) technology, such as portable terminals supporting 5G NR, transmit reference signals to the base station to monitor radio wave propagation before data communication. At this time, the reference signals are output to two of the multiple antennas mounted on the mobile terminal. Conversely, during uplink transmission from the mobile terminal to the base station, transmission occurs from one antenna via PC2, and from each of the two antennas via PC3.

[0034] Here, PC2 and PC3 represent "Power Classes" indicating the output level of the signal, as specified by 3GPP. For example, PC3 has a transmit power of 23 dBm transmitted from the mobile terminal's antenna, while PC2 has a transmit power of 26 dBm transmitted from the mobile terminal's antenna. That is, PC2 has a transmit power 3 dBm higher than PC3, and therefore approximately twice the output power.

[0035] Therefore, in mobile terminals corresponding to 5G NR, for example, it is required to implement methods for transmitting reference signals, methods for transmitting from one antenna via PC2, and methods for transmitting from two antennas respectively via PC3. The power amplification module 100 according to this embodiment can achieve high-efficiency transmission at least for these methods.

[0036] First, refer to Figure 1 A summary of the above-described method in the power amplifier module 100 will be provided. Additionally, in Figure 1 In the example, dashed lines are used to show the communication path for transmitting PC3 signals from two antennas, ANT1 and ANT2, respectively, while double-dotted lines are used to show the communication path for transmitting PC2 signals from one antenna, ANT1 (or ANT2).

[0037] like Figure 1 As shown, input signal RFin1 is input to the first amplifier 110a from terminal TX1, and input signal RFin2 is input to the second amplifier 110b from terminal TX2. The first amplifier 110a and the second amplifier 110b are designed, for example, to be best suited for PC3.

[0038] When the power amplifier module 100 transmits PC3 signals from the two antennas ANT1 and ANT2 respectively, the input signal RFI1 is transmitted to antenna ANT1 via the first amplifier 110a, the first band selection switch 140a, the duplexer 150, and the antenna switch 160. Similarly, the input signal RFI2 is transmitted to antenna ANT2 via the second amplifier 110b, the second band selection switch 140b, the duplexer 150, and the antenna switch 160. Although not shown here, multiple duplexers 150 corresponding to their respective frequency bands can also be connected after the first and second band selection switches 140a and 140b.

[0039] On the other hand, when the power amplifier module 100 transmits the signal of PC2 from antenna ANT2, the input signal RFin1 is input to the combiner 180 via the first amplifier 110a, the first band selection switch 140a, the duplexer 150, and the antenna switch 160. The input signal RFin2 is input to the combiner 180 via the second amplifier 110b, the second band selection switch 140b, the duplexer 150, and the antenna switch 160. The combiner 180 combines the input signal RFin1 (amplified signal RFamp1) of PC3 and the input signal RFin2 (amplified signal RFamp2) of PC3, and outputs the signal of PC2. Here, the combiner 180 is configured to include a transmission line transformer. The signal output from the combiner 180 is transmitted to antenna ANT2 via path switching switch 170.

[0040] That is, the power amplifier module 100 uses two amplifiers designed to be best suited for PC3, which can send the signal of PC3 to the dual-system antennas ANT1 and ANT2, and further, can also send the signal of PC2 to the single-system antenna ANT1 (or ANT2).

[0041] Here, refer to Figure 10 The power amplifier module 1000 involved in the comparative example will be described. Figure 10 This is a diagram showing a general outline of the structure of the power amplifier module 1000 involved in the comparative example. Additionally, in Figure 10 In the example, dashed lines are used to show the communication paths for transmitting PC3 signals from two antennas, ANT1 and ANT2, respectively, while double-dotted lines are used to show the communication paths for transmitting PC2 signals from one antenna, ANT1.

[0042] When the power amplifier module 1000 transmits the PC3 signal from two antennas ANT1 and ANT2 respectively, the input signal RFin1 is input to amplifier 1112 located on a given substrate S1, and the input signal RFin2 is input to amplifier 1210 located on a substrate S2 different from the given substrate S1. Here, each amplifier 1112 and 1210 is designed to be most suitable for PC2 because PC2 is transmitted using only one antenna. The input signals RFin1 and RFin2 are transmitted to each antenna ANT1 and ANT2 respectively via frequency band selection switches 1142 and 1240 and duplexers 1152 and 1250 located on different substrates S1 and S2, and via antenna switch 1160 located on the given substrate S1.

[0043] Based on the above, compared with the power amplifier module 1000 of the comparative example, the power amplifier module 100 of this embodiment is designed with the first amplifier 110a and the second amplifier 110b most suitable for PC3, thus improving the transmission efficiency. Furthermore, the power amplifier module 100 synthesizes the signal of PC3 to generate PC2, thus eliminating the need for components (the substrate S2 of the power amplifier module 1000) for generating the signal of PC2, thereby reducing the number of components and miniaturizing the package. Moreover, the synthesizer 180 includes a transmission line transformer, thus enabling a single synthesizer 180 to handle the wideband frequencies of MB and HB. Furthermore, the synthesizer 180 is disposed on the antenna ANT1 and ANT2 side of the antenna switch 160, so the input / output terminals of the antenna switch 160 are 50 ohms, thus suppressing power loss caused by the resistive component of the antenna switch 160.

[0044] Next, refer to Figure 2 The structure of the power amplifier module 100 is described in detail. Figure 2 This is a diagram illustrating an example of the structure of the power amplifier module 100 according to this embodiment.

[0045] The power amplifier module 100 includes, for example, a first amplifier 110a, a first impedance transformer 120a, a first filter circuit 130a, a first band selection switch 140a, a second amplifier 110b, a second impedance transformer 120b, a second filter circuit 130b, a second band selection switch 140b, a duplexer 150, an antenna switch 160, a path switching switch 170, and a combiner 180. Each component will be described in detail later.

[0046] The first amplifier 110a is, for example, a circuit that amplifies the power level of the input signal RFin1 and outputs an amplified signal RFamp1. The first amplifier 110a is, for example, a circuit that handles the input signal RFin1 in the MB (Middle Band) and HB (High Band) frequency bands (1710MHz to 2690MHz). The first amplifier 110a is, for example, designed to be best suited for PC3.

[0047] The first impedance transformer 120a is, for example, a circuit that transforms impedance with a given transformation ratio, and is configured to include a transmission line transformer. Figure 2 As an example, the transformation ratio is shown as "1:9 to 25". By incorporating a transmission line transformer, wide-bandwidth and low-loss impedance transformation is possible. Transmission line transformers will be discussed in detail later.

[0048] The first filter circuit 130a filters signals in the MB and HB frequency bands, for example. The first filter circuit 130a can be, for example, a fixed filter with a passband fixed to a specific frequency band, a variable filter with a passband that varies according to multiple frequency bands, or a filter circuit that combines fixed and variable filters in a switchable manner. Thus, the attenuation characteristics are improved near the passband.

[0049] The Band Select Switch 140a is, for example, a switch that assigns multiple high-frequency signals with different frequency bands to a desired terminal. The Band Select Switch 140a receives an amplified signal RFamp1 at its input terminal and outputs that signal from the desired output terminal.

[0050] The second amplifier 110b, the second impedance transformer 120b, the second filter circuit 130b, and the second frequency band selection switch 140b are the same as the first amplifier 110a, the first impedance transformer 120a, the first filter circuit 130a, and the first frequency band selection switch 140a, so their description is omitted.

[0051] That is, high-frequency signals with approximately the same phase and amplitude are input to the first amplifier 110a and the second amplifier 110b. Then, the two amplifiers 110a and 110b amplify the input high-frequency signals and output high-frequency signals with approximately the same phase and amplitude. The high-frequency signals amplified by the two amplifiers 110a and 110b undergo impedance transformation by transmission line transformers in impedance transformers 120a and 120b, respectively, before being output to the duplexer 150.

[0052] A duplexer (DPX) 150 is, for example, a filter circuit that switches between the transmit and receive frequencies when they are different. The duplexer 150 is connected, for example, between the output terminals of the first and second band selection switches 140a and 140b and the input terminal 161 of the antenna switch 160, described later. Figure 2 The diagram shows the duplexer 150 distributing the amplified signal RFamp1 and the received signal RX. Alternatively, in communication methods such as TDD (Time Division Duplex), the duplexer 150 can be omitted, or it can be replaced with a conventional bandpass filter.

[0053] Antenna Switch 160, for example, is a switch that switches between the path connected to each antenna ANT1, ANT2 and the path connected to the synthesizer 180 described later. Thus, it is possible to selectively determine whether to output the signal of PC3 to each antenna ANT1, ANT2 or to input the signals of both PC3 to the synthesizer 180 and output the signal of PC2.

[0054] Specifically, the antenna switch 160 includes, for example, an input terminal 161, a first output terminal 162a, a second output terminal 162b, and a third output terminal 162c. The input terminal 161 is, for example, a terminal connected to each duplexer 150 and receiving amplified signals RFamp1 and RFamp2. The first output terminal 162a is, for example, a terminal connected to antenna ANT1, causing amplified signal RFamp1 to be output to antenna ANT1. The second output terminal 162b is, for example, a terminal connected to antenna ANT2, causing amplified signal RFamp2 to be output to antenna ANT2. The third output terminal 162c is, for example, a terminal connected to combiner 180, causing amplified signals RFamp1 and RFamp2 to be output to combiner 180.

[0055] The path switching switch 170 is a switch that distributes the signal output from the synthesizer 180 (described later) to the desired antenna.

[0056] Synthesizer 180 is, for example, a circuit that synthesizes the PC3 signal of amplified signals RFamp1 and RFamp2 to generate the PC2 signal. Synthesizer 180 is connected between antenna switch 160 and each antenna ANT1 and ANT2. Therefore, all input and output terminals of antenna switch 160 are approximately 50 ohms, thus suppressing power loss caused by the resistive component of antenna switch 160. Synthesizer 180 is, for example, constructed by incorporating transmission line transformers. By including transmission line transformers, wideband and low-loss impedance transformation is possible.

[0057] First, refer to Figure 3A , Figure 3B The construction of the transmission line transformer 190 will be described, and then, referring to... Figures 4-8 A variation of the synthesizer 180, which incorporates the transmission line transformer 190, will be described.

[0058] Figure 3A This is a simplified illustration of an example of a transmission line transformer 190. Figure 3B , Figure 3C This is a perspective view that simplifies the construction of a transmission line transformer 190.

[0059] like Figure 3A As shown, the transmission line transformer 190 includes, for example, a first transmission line 191, a second transmission line 192, and a third transmission line 193. First, the alternating current flowing through the first transmission line 191, the second transmission line 192, and the third transmission line 193 will be explained. The current flowing from the input terminal 190a to the output terminal 190b first flows from the first end 191a of the first transmission line 191 to the second end 191b, and then from the third end 192a of the second transmission line 192 to the fourth end 192b. The magnitude of the alternating current flowing through the first transmission line 191 is equal to the magnitude of the alternating current flowing through the second transmission line 192. An odd-mode current is induced in the third transmission line 193 from the fifth end 193a to the sixth end 193b due to the alternating current flowing through the first transmission line 191, and an odd-mode current is induced in the third transmission line 193 from the fifth end 193a to the sixth end 193b due to the alternating current flowing through the second transmission line 192. The direction of the odd-mode current induced in the third transmission line 193 is opposite to the direction of the alternating current flowing through the first transmission line 191 and the second transmission line 192. The magnitude and direction of the odd-mode current induced by the current flowing through the first transmission line 191 and the odd-mode current induced by the current flowing through the second transmission line 192 are the same.

[0060] That is, in the third transmission line 193, the odd-mode current from the first transmission line 191 and the odd-mode current from the second transmission line 192 flow superimposed. Therefore, an odd-mode current twice the magnitude of the current flowing through the series circuit containing the first transmission line 191 and the second transmission line 192 is induced in the third transmission line 193. If i represents the magnitude of the current flowing into the transmission line transformer 190 from the input terminal 190a, then (1 / 3)i current flows through the series circuit of the first transmission line 191 and the second transmission line 192, and (2 / 3)i current flows through the third transmission line 193. Therefore, the magnitude of the current output from the output terminal 190b is (1 / 3)i.

[0061] Next, the voltages will be explained. Let v1 represent the voltage at input terminal 190a, and v2 represent the voltage at output terminal 190b. The voltage at the first end 191a of the first transmission line 191 and the voltage at the fifth end 193a of the third transmission line 193 are both equal to the voltage v1 at input terminal 190a. The voltage at the fourth end 192b of the second transmission line 192 is equal to the voltage v2 at output terminal 190b. Let v3 represent the voltage at the second end 191b of the first transmission line 191. The voltage at the third end 192a of the second transmission line 192 is equal to the voltage v3 at the second end 191b of the first transmission line 191. The voltage at the sixth end 193b of the third transmission line 193 is 0V.

[0062] The potential difference between the first end 191a and the second end 191b of the first transmission line 191 is equal to the potential difference between the sixth end 193b and the fifth end 193a of the third transmission line 193, therefore v1-v3=0-v1 holds true. Similarly, between the second transmission line 192 and the third transmission line 193, v3-v2=0-v1 holds true. Solving this simultaneous equation yields 3×v1=v2. Thus, the voltage v2 at the output terminal 190b becomes three times the voltage v1 at the input terminal 190a.

[0063] When a load with impedance R2 is connected to output terminal 190b, v2 = (1 / 3)i × R2 holds true. If R1 represents the impedance observed from input terminal 190a at the load side, then v1 = R1 × i holds true. Solving these equations, we get R1 = (1 / 9)R2. Thus, the impedance R1 observed from input terminal 190a at the load side becomes (1 / 9) times the impedance R2 of the load connected to output terminal 190b. Conversely, if a load is connected to input terminal 190a, the impedance observed from output terminal 190b at the load side becomes 9 times that of the load connected to input terminal 190a. In this way, the transmission line transformer 190 based on this embodiment functions as an impedance transformation circuit with an impedance transformation ratio of 9.

[0064] like Figure 3B As shown, the transmission line transformer is configured such that the first to third transmission lines are stacked in the thickness direction of the substrate. Specifically, the first end 191a of the first transmission line 191, the fifth end 193a of the third transmission line 193, and the fourth end 192b of the second transmission line 192 are arranged to overlap each other in plan view. The second end 191b of the first transmission line 191 and the third end 192a of the second transmission line 192 are arranged to overlap each other in plan view. A conductor pattern 199 is arranged in the same layer as the third transmission line 193, at a position corresponding to the second end 191b of the first transmission line 191. A via conductor 195 connects the first end 191a of the first transmission line 191 and the fifth end 193a of the third transmission line 193. Via conductor 196 connects the second end 191b of the first transmission line 191 to the conductor pattern 199. Via conductor 197 connects the conductor pattern 199 to the third end 192a of the second transmission line 192. Via conductor 198 connects the fourth end 192b of the second transmission line 192 to the lead-out line 194. The first end 191a of the first transmission line 191 is connected to the input terminal 190a, and the lead-out line 194 is connected to the output terminal 190b. The sixth end 193b of the third transmission line 193 is connected to the ground conductor GND.

[0065] The above is set Figure 3A , Figure 3B The impedance transformation ratio of the transmission line transformer 190 shown is explained as 1:9, but as... Figure 3C As shown, for example, the impedance transformation ratio of the transmission line transformer 190, which has a two-layer structure of transmission line 191 and transmission line 193, is 1:4. Furthermore, in Figure 3A , Figure 3B In the transmission line transformer 190 shown, by connecting the first end 191a of the first transmission line 191 to the fifth end 193a of the third transmission line 193, connecting the sixth end 193b of the third transmission line 193 to the fourth end 192b of the second transmission line 192, and connecting the third end 192a of the second transmission line 192 to the grounding conductor GND, the impedance transformation ratio becomes 1:2.25.

[0066] In this embodiment, as an example, a synthesizer 180 configured by combining transmission line transformers with an impedance transformation ratio of 1:9 (or 9:1), 1:4 (or 4:1), and 1:2.25 (or 2.25:1) will be described. However, the synthesizer 180 can also be configured by combining transmission line transformers with various transformation ratios, for example, by configuring the impedance of the input terminal and the impedance of the output terminal to be approximately the same. Furthermore, for convenience, the portion of the transmission line transformer 190 connected to the input terminal 190a will be referred to as "one end," and the portion connected to the output terminal 190b will be referred to as "the other end."

[0067] <<Synthesizer 180a of the first method>>

[0068] Reference Figure 4 The synthesizer 180a of the first method will be described. Figure 4 This is a diagram showing a structural example of the synthesizer 180a of the first mode.

[0069] like Figure 4 As shown, the synthesizer 180a includes, for example, a first input terminal 181a, a first transmission line transformer 182a, a second input terminal 183a, a second transmission line transformer 184a, a first isolation section 185a, a synthesis terminal 186a, a third transmission line transformer 187a, and an output terminal 188a.

[0070] The first input terminal 181a is the terminal to which the amplified signal RFamp1 is input. The first transmission line transformer 182a is, for example, a circuit that performs impedance transformation with a transformation ratio of 1:9. One end of the first transmission line transformer 182a is connected to the first input terminal 181a, and the other end is connected to the synthesizing terminal 186a. The second input terminal 183a is the terminal to which the amplified signal RFamp2 is input. The second transmission line transformer 184a is, for example, a circuit that performs impedance transformation with the same transformation ratio as the first transmission line transformer 182a, 1:9. One end of the second transmission line transformer 184a is connected to the second input terminal 183a, and the other end is connected to the synthesizing terminal 186a. That is, the first transmission line transformer 182a and the second transmission line transformer 184a are connected in parallel. The first isolation section 185a is constructed by connecting a resistor R and a capacitor C in parallel. The first isolation section 185a is connected between the first input terminal 181a and the second input terminal 183a. The combining terminal 186a is used to combine the amplified signal RFamp1 input through the first transmission line transformer 182a and the amplified signal RFamp2 input through the second transmission line transformer 184a. The third transmission line transformer 187a is, for example, a circuit that performs impedance transformation with a transformation ratio of 4:1. One end of the third transmission line transformer 187a is connected to the combining terminal 186a, and the other end is connected to the output terminal 188a. The output terminal 188a is connected to the path switching switch 170.

[0071] Next, a summary of the impedance transformation in synthesizer 180a will be provided. The impedance at the first input terminal 181a of synthesizer 180a is ZS (50 ohms). In the first transmission line transformer 182a, ZS (50 ohms) is transformed to 9 × ZS (450 ohms). The same applies to the second input terminal 183a and the second transmission line transformer 184a. Furthermore, at the synthesizing terminal 186a, the impedance becomes 9 × ZS × 1 / 2 (225 ohms), and in the third transmission line transformer 187a, the impedance is transformed to one-quarter. Therefore, the impedance (ZL) at the output terminal 188a becomes ZS × 9 / 8 (approximately 50 ohms). Additionally, the impedance can be fine-tuned in the third transmission line transformer 187a.

[0072] Therefore, compared with the power amplifier module 1000 involved in the comparative example, the power amplifier module 100 can achieve low loss and wide bandwidth.

[0073] <<Synthesizer 180b of the second method>>

[0074] Reference Figure 5 The synthesizer 180b of the second method will be described. Figure 5 This is a diagram showing an example of the structure of synthesizer 180b in the second manner.

[0075] like Figure 5 As shown, the synthesizer 180b includes, for example, a third input terminal 181b, a fourth transmission line transformer 182b, a fourth input terminal 183b, a fifth transmission line transformer 184b, a second isolation section 185b, a synthesis terminal 186b, a sixth transmission line transformer 187b, and an output terminal 188b.

[0076] The synthesizer 180b of the second method replaces the first and second transmission line transformers 182a and 184a, which have a conversion ratio of 1:9 in the synthesizer 180a of the first method, with the fourth and fifth transmission line transformers 182b and 184b, which have a conversion ratio of 4:1, and replaces the third transmission line transformer 187a, which has a conversion ratio of 4:1, with the sixth transmission line transformer 187b, which has a conversion ratio of 1:9. This enables low-loss and wide-bandwidth power combining.

[0077] <<Synthesizer 180c of the third method>>

[0078] Reference Figure 6 The synthesizer 180c of the third method will be described. Figure 6 This is a diagram showing an example of the structure of the synthesizer 180c of the third method.

[0079] like Figure 6 As shown, the synthesizer 180c includes, for example, a fifth input terminal 181c, a seventh transmission line transformer 182c, an eighth transmission line transformer 183c, a sixth input terminal 184c, a ninth transmission line transformer 185c, a tenth transmission line transformer 186c, a third isolation section 187c, a synthesis terminal 188c, a first connection terminal 1881c, a second connection terminal 1882c, and an output terminal 189c.

[0080] Input terminal 5, 181c, is the terminal for the input amplified signal RFamp1. Transmission line transformer 7, 182c, is, for example, a circuit that performs impedance transformation with a transformation ratio of 1:9. One end of transmission line transformer 7, 182c, is connected to input terminal 5, 181c, and the other end is connected to one end of transmission line transformer 8, 183c, via connection terminal 1, 1881c. Transmission line transformer 8, 183c, is, for example, a circuit that performs impedance transformation with a transformation ratio of 4:1. The other end of transmission line transformer 8, 183c, is connected to the synthesis terminal, 188c. Input terminal 6, 184c, is the terminal for the input amplified signal RFamp2. Transmission line transformer 9, 185c, is, for example, a circuit that performs impedance transformation with the same transformation ratio as transmission line transformer 7, 182c, 1:9. One end of transmission line transformer 9, 185c, is connected to input terminal 6, 184c, and the other end is connected to one end of transmission line transformer 10, 186c, via connection terminal 2, 1882c. The 10th transmission line transformer 186c is, for example, a circuit that performs impedance transformation with the same transformation ratio as the 8th transmission line transformer 183c, 4:1. The other end of the 10th transmission line transformer 186c is connected to the combining terminal 188c. That is, the 7th transmission line transformer 182c, the 8th transmission line transformer 183c, the 9th transmission line transformer 185c, and the 10th transmission line transformer 186c are connected in parallel. The 3rd isolation section 187c is connected between the 5th input terminal 181c and the 6th input terminal 184c. The 3rd isolation section 187c is, for example, a resistor with a resistance value corresponding to the power distribution rate of the transmission line connected to the 5th input terminal 181c and the transmission line connected to the 6th input terminal 184c. The combining terminal 188c is used to combine the amplified signal RFamp1 input through the 7th transmission line transformer 182c and the 8th transmission line transformer 183c, and the amplified signal RFamp2 input through the 9th transmission line transformer 185c and the 10th transmission line transformer 186c. An output terminal 189c is connected to the combining terminal 188c. The output terminal 189c is connected to the path switching switch 170.

[0081] Next, a summary of the impedance transformation in synthesizer 180c will be provided. The impedance at input terminal 181c of synthesizer 180c is ZS (50 ohms). In transmission line transformer 182c, ZS (50 ohms) is transformed to 9 × ZS (450 ohms). Furthermore, in transmission line transformer 183c, it is transformed to ZS × 9 / 4 (112 ohms). The same applies to input terminal 184c, transmission line transformer 185c, and transmission line transformer 186c. Moreover, at synthesizing terminal 188c, ZS × 9 / 4 (112 ohms) is halved. Therefore, the impedance at output terminal 189c becomes ZS × 9 / 8 (approximately 50 ohms). Additionally, the impedance can be fine-tuned in transmission line transformer 183c and transmission line transformer 186c.

[0082] Therefore, compared with the power amplifier module 1000 involved in the comparative example, the power amplifier module 100 can achieve low loss and wide bandwidth.

[0083] <<Synthesizer 180d of the Fourth Mode>>

[0084] Reference Figure 7 The synthesizer 180d of the fourth method will be described. Figure 7 This is a diagram showing a structural example of the synthesizer 180d of the fourth method.

[0085] like Figure 7 As shown, the fourth-mode synthesizer 180d includes, for example, a 7th input terminal 181d, an 11th transmission line transformer 182d, a 12th transmission line transformer 183d, an 8th input terminal 184d, a 13th transmission line transformer 185d, a 14th transmission line transformer 186d, a 4th isolation section 187d, a synthesizing terminal 188d, and an output terminal 189d. The fourth-mode synthesizer 180d replaces the 7th and 9th transmission line transformers 182c and 185c with a conversion ratio of 1:9 in the third-mode synthesizer 180c with the 11th and 13th transmission line transformers 182d and 185d with a conversion ratio of 4:1, and replaces the 8th and 10th transmission line transformers 183c and 186c with a conversion ratio of 4:1 with the 12th and 14th transmission line transformers 183d and 186d with a conversion ratio of 1:9. This enables low-loss and wide-bandwidth power combining.

[0086] <<Synthesizer 180e of the fifth method>>

[0087] Reference Figure 8 The synthesizer 180e of the fifth method will be described. Figure 8 This is a diagram showing a structural example of the synthesizer 180e of the fifth mode.

[0088] like Figure 8 As shown, the synthesizer 180e includes, for example, a 9th input terminal 181e, a 10th input terminal 182e, a 15th transmission line transformer 183e, a 16th transmission line transformer 184e, a 5th isolation section 185e, an output terminal 186e, and a synthesis terminal 187e.

[0089] Input terminal 9, 181e, is the terminal for the input amplified signal RFamp1. Input terminal 10, 182e, is the terminal for the input amplified signal RFamp2. Transmission line transformer 15, 183e, is, for example, a circuit that performs impedance transformation with a transformation ratio of 4:1. In transmission line transformer 15, 183e, for example, in... Figure 3C The transmission line transformer 190 shown has a 9th input terminal 181e connected to the 2nd end 191b of the first transmission line 191, a 10th input terminal 182e connected to the 6th end 193b (2nd end) of the third transmission line 193, and a composite terminal 187e connected to the 1st end 191a of the first transmission line 191. Here, in Figure 3C The diagram shows a transmission line transformer 190 with a lead-out line 194, but it may also be without a lead-out line 194. In this case, the second end 191b of the first transmission line 191 may extend to the outside of the first transmission line 191, with a ninth input terminal 181e provided at the destination of the extension. The other end of the fifth transmission line transformer 183e is connected to one end of the sixth transmission line transformer 184e via a combination terminal 187e. The sixth transmission line transformer 184e is, for example, a circuit that performs impedance transformation with a transformation ratio of 1:2.25. One end of the sixth transmission line transformer 184e is connected to the other end of the fifth transmission line transformer 183e, and the other end is connected to the output terminal 186e. The output terminal 186e is connected to the path switching switch 170.

[0090] Next, a summary of the impedance transformation in synthesizer 180e will be explained. The impedance at input terminals 181e and 182e of synthesizer 180e is ZS (50 ohms). Here, transmission line transformer 183e transforms the total impedance connected between input terminal 9 181e and input terminal 182e to 1 / 4. When in-phase power is input to input terminals 181e and 182e of synthesizer 180e, the impedance between input terminals 181e and 182e can be considered as two ZS connected in series via a common terminal (ground), which is 2 × ZS, becoming 100 ohms. In transmission line transformer 183e, 2 × ZS (100 ohms) is transformed into 2 × ZS × 1 / 4 (25 ohms), becoming (25 ohms) at synthesizer terminal 187e (synthesizer terminal). Furthermore, in the 16th transmission line transformer 184e, the impedance is transformed to ZS / 2×2.25, and the impedance at the output terminal 186e becomes ZS / 2×2.25 (approximately 50 ohms). Additionally, the impedance can be fine-tuned in the 16th transmission line transformer 184e.

[0091] Therefore, compared with the power amplifier module 1000 involved in the comparative example, the power amplifier module 100 can achieve low loss and wide bandwidth.

[0092] ===Other Implementation Methods===

[0093] Reference Figure 9A as well as Figure 9B Other embodiments of the power amplifier module 200 will be described. Figure 9A as well as Figure 9B This is a diagram showing a schematic of the structure of the power amplifier module 200 according to other embodiments.

[0094] Other embodiments involve a power amplifier module 200 configured to include a combiner 280, which includes... Figure 1 The antenna switch 160 of the power amplifier module 100 shown is identical to that of the power amplifier module 100, and therefore its description is omitted.

[0095] exist Figure 9A The image shows a power amplifier module 200 with a transmission line transformer between antenna switch 282 and antennas ANT1 and ANT2. For example... Figure 9A As shown, the synthesizer 280 includes, for example, a pre-stage transmission line transformer 281, an antenna switch 282, a post-stage transmission line transformer 283, and a synthesizing terminal 284.

[0096] The transmission line transformer 281 of the preamplifier stage is connected to the antenna ANT1 and ANT2 sides of the duplexer 250. The transmission line transformer 281 of the preamplifier stage performs impedance transformation at a given transformation ratio. Specifically, the transmission line transformer 281 of the preamplifier stage corresponds, for example, to the first and second transmission line transformers 182a and 184a, and the fourth and fifth transmission line transformers 182b and 184b in the combiners 180a and 180b of the power amplifier module 100.

[0097] For example, in Figure 2 In the antenna switch 160 shown, the input terminal is connected to the duplexer 150, but in the antenna switch 282, instead, the input terminal is connected to the preceding transmission line transformer 281. The construction of the antenna switch 282 is similar to... Figure 2 The antenna switch 160 shown has the same construction, so its description is omitted. Furthermore, regarding the combining terminal of the combiner 180 in the power amplifier module 100, in the power amplifier module 200 of other embodiments, the combining terminal 284 is provided, for example, between the antenna switch 282 and the subsequent transmission line transformer 283.

[0098] The subsequent transmission line transformer 283 is connected to the antenna ANT1 and ANT2 sides of the antenna switch 282. The subsequent transmission line transformer 283 performs impedance transformation at a given transformation ratio. Specifically, the subsequent transmission line transformer 283 corresponds to the third transmission line transformer 187a and the sixth transmission line transformer 187b in the combiners 180a and 180b of the power amplifier module 100.

[0099] Therefore, compared with the power amplifier module 1000 involved in the comparative example, the power amplifier module 200 can be miniaturized.

[0100] exist Figure 9B The image shows a power amplifier module 200 that does not have a transmission line transformer between the antenna switch 282 and the antennas ANT1 and ANT2. For example... Figure 9BAs shown, the combiner 280 includes, for example, a pre-amplifier transmission line transformer 281, an antenna switch 282, and a combining terminal 284. The pre-amplifier transmission line transformer 281 is connected to the antenna ANT1 and ANT2 sides of the duplexer 250. The pre-amplifier transmission line transformer 281 performs impedance transformation at a given transformation ratio. Specifically, the pre-amplifier transmission line transformer 281 corresponds, for example, to the 7th and 8th transmission line transformers 182c and 183c, the 9th and 10th transmission line transformers 185c and 186c, the 11th and 12th transmission line transformers 182d and 183d, and the 13th and 14th transmission line transformers 185d and 186d in the combiners 180c and 180d of the power amplifier module 100. The antenna switch 282 is the same as described above, so its description is omitted. The combining terminal 284 is connected, for example, to a path switching switch 270. The path switching switch 270 is the same as the path switching switch 170, so its description is omitted. Therefore, compared with the power amplifier module 1000 involved in the comparative example, the power amplifier module 200 can be miniaturized.

[0101] ===Summary===

[0102] The power amplifier module 100 according to this embodiment includes: a first amplifier 110a, which amplifies the power level of an input signal RFin1 (first input signal) in a given frequency band and outputs an amplified signal RFamp1 (first signal) of PC3 (first power level); a first impedance transformer 120a, connected to the first amplifier 110a, and including a transmission line transformer; and a second amplifier 110b, which amplifies the power level of an input signal RFin2 (second input signal) in a given frequency band and outputs an amplified signal RFamp1 (first signal) of PC3 (first power level); The signal consists of: an amplified signal RFamp2 (the second signal) input through the first impedance transformer 120a; a second impedance transformer 120b connected to the second amplifier 110b, which includes a transmission line transformer; and a combiner 180 that combines the amplified signal RFamp1 (the first signal) input through the first impedance transformer 120a and the amplified signal RFamp2 (the second signal) input through the second impedance transformer 120b into an output signal PC2 (the second power level), which is larger than PC3 (the first power level), and includes a transmission line transformer. This allows for miniaturization of the module while improving transmission efficiency.

[0103] Furthermore, the power amplifier module 100 according to this embodiment also includes an antenna switch 160, which comprises: a terminal (first terminal) of the input terminals 161, through which an amplified signal RFamp1 (first signal) is input via a first impedance transformer 120a; a terminal (second terminal) of the input terminals 161, through which an amplified signal RFamp2 (second signal) is input via a second impedance transformer 120b; a first output terminal 162a for outputting the amplified signal RFamp1 (first signal) to antenna ANT1 (first antenna); a second output terminal 162b for outputting the amplified signal RFamp2 (second signal) to antenna ANT2 (second antenna), which is different from antenna ANT1 (first antenna); and a third output terminal 162c for outputting the amplified signals RFamp1 (first signal) and RFamp2 (second signal) to the combiner 180. Thus, while achieving module miniaturization, transmission efficiency can be improved. Furthermore, the synthesizer 180 is positioned on the antenna ANT1 and ANT2 side of the antenna switch 160, so the input and output terminals of the antenna switch 160 are 50 ohms, thus suppressing the power loss caused by the resistive component of the antenna switch 160.

[0104] Furthermore, the first-mode synthesizer 180a (synthesizer) in the power amplifier module 100 according to this embodiment includes: a synthesis terminal 186a, a synthesized amplified signal RFamp1 (first signal) and an amplified signal RFamp2 (second signal); a first transmission line transformer 182a, connected between the synthesis terminal 186a and the first input terminal 181a of the input amplified signal RFamp1 (first signal), performing impedance transformation with a transformation ratio of 1:9 (first transformation ratio) to increase the impedance; and a second transmission line transformer... A transformer 184a is connected between the synthesizer terminal 186a and the second input terminal 183a of the input amplified signal RFamp2 (the second signal), performing impedance transformation at a ratio of 1:9 (the first transformation ratio) to increase the impedance; a third transmission line transformer 187a is connected between the synthesizer terminal 186a and the output terminal 188a, performing impedance transformation at a ratio of 4:1 (the second transformation ratio) to decrease the impedance; and a first isolation section 185a is connected between the first input terminal 181a and the second input terminal 183a. This enables a low-loss and wide-bandwidth power amplifier module 100.

[0105] Furthermore, the synthesizer 180b (synthesizer) of the second type in the power amplification module 100 according to this embodiment includes: a synthesis terminal 186b, a synthesized amplified signal RFamp1 (first signal) and an amplified signal RFamp2 (second signal); a fourth transmission line transformer 182b, connected between the synthesis terminal 186b and the third input terminal 181b of the input amplified signal RFamp1 (first signal), performing impedance transformation with a transformation ratio of 4:1 (third transformation ratio) to reduce the impedance; and a fifth transmission line transformer... A transformer 184b is connected between the synthesizer terminal 186b and the fourth input terminal 183b of the input amplified signal RFamp2 (the second signal), performing impedance transformation at a ratio of 4:1 (the third transformation ratio) to reduce the impedance; a sixth transmission line transformer 187b is connected between the synthesizer terminal 186b and the output terminal 188b, performing impedance transformation at a ratio of 1:9 (the fourth transformation ratio) to increase the impedance; and a second isolation section 185b is connected between the third input terminal 181b and the fourth input terminal 183b. This enables a low-loss and wide-bandwidth power amplifier module 100.

[0106] Furthermore, the third-mode synthesizer 180c (synthesizer) in the power amplifier module 100 according to this embodiment includes: a synthesis terminal 188c, which synthesizes amplified signals RFamp1 (first signal) and RFamp2 (second signal); a seventh transmission line transformer 182c, which performs impedance transformation with a conversion ratio of 1:9 (fifth conversion ratio) to increase the impedance; an eighth transmission line transformer 183c, which is connected in series with the seventh transmission line transformer 182c through a first connection terminal 1881c, and performs impedance transformation with a conversion ratio of 4:1 (sixth conversion ratio) to decrease the impedance; a ninth transmission line transformer 185c, which performs impedance transformation with a conversion ratio of 1:9 (seventh conversion ratio) to increase the impedance; and a tenth transmission line transformer 186c, which is connected to the ninth transmission line transformer 185c through a second connection terminal 1882c. The series connection uses a 4:1 impedance transformation ratio (sixth transformation ratio) to reduce impedance. A seventh transmission line transformer 182c is connected between the first connection terminal 1881c and the fifth input terminal 181c of the amplified signal RFamp1 (first signal). An eighth transmission line transformer 183c is connected between the first connection terminal 1881c and the combining terminal 188c. A ninth transmission line transformer 185c is connected between the second connection terminal 1882c and the sixth input terminal 184c of the amplified signal RFamp2 (second signal). A tenth transmission line transformer 186c is connected between the second connection terminal 1882c and the combining terminal 188c. The combiner 180c also includes a third isolation section 187c connected between the fifth input terminal 181c and the sixth input terminal 184c. This enables a low-loss and wide-bandwidth power amplifier module 100.

[0107] Furthermore, the fourth type of synthesizer 180d in the power amplifier module 100 according to this embodiment includes: a synthesis terminal 188d, which synthesizes amplified signals RFamp1 (first signal) and RFamp2 (second signal); an 11th transmission line transformer 182d, which performs impedance transformation at a transformation ratio of 4:1 (7th transformation ratio) to reduce impedance; a 12th transmission line transformer 183d, which is connected in series via a 3rd connection terminal 1881d, and performs impedance transformation at a transformation ratio of 1:9 (8th transformation ratio) to increase impedance; a 13th transmission line transformer 185d, which performs impedance transformation at a transformation ratio of 4:1 (7th transformation ratio) to reduce impedance; and a 14th transmission line transformer 186d, which is connected in series with the 13th transmission line transformer 185d via a 4th connection terminal 1882d to reduce impedance; An impedance transformation with a conversion ratio of 1:9 (8th conversion ratio) increases the impedance. The 11th transmission line transformer 182d is connected between the 3rd connection terminal 1881d and the 7th input terminal 181d of the input amplified signal RFamp1 (1st signal). The 12th transmission line transformer 183d is connected between the 3rd connection terminal 1881d and the combining terminal 188d. The 13th transmission line transformer 185d is connected between the 4th connection terminal 1882d and the 8th input terminal 184d of the input amplified signal RFamp2 (2nd signal). The 14th transmission line transformer 186d is connected between the 4th connection terminal 1882d and the combining terminal 188d. The combiner 180d (combiner) also includes a 4th isolation section 187d connected between the 7th input terminal 181d and the 8th input terminal 184d. Thus, a low-loss and wide-bandwidth power amplifier module 100 can be realized.

[0108] Furthermore, the synthesizer 180e (synthesizer) of the fifth type in the power amplification module 100 according to this embodiment includes: a synthesis terminal 187e, a synthesized amplified signal RFamp1 (first signal) and an amplified signal RFamp2 (second signal); a 15th transmission line transformer 183e, having a first end 191a connected to the 9th input terminal 181e and input to the amplified signal RFamp1 (first signal), and a sixth end 193b connected to the 10th input terminal 182e and input to the amplified signal RFamp2 (second signal). The third end (the end connected to the synthesis terminal 187e) and the fourth end (the third end) undergo impedance transformation at a ratio of 4:1 (the ninth transformation ratio) to reduce impedance; the sixth transmission line transformer 184e, connected in series with the fifth transmission line transformer 183e via the synthesis terminal 187e, is connected between the synthesis terminal 187e and the output terminal 186e, and undergoes impedance transformation at a ratio of 1:2.25 (the tenth transformation ratio) to increase impedance; and the fifth isolation section 185e is connected between the ninth input terminal 181e and the tenth input terminal 182e. Thus, a low-loss and wide-bandwidth power amplifier module 100 can be realized.

[0109] Furthermore, the power amplifier module 200 according to this embodiment includes a combiner 280 comprising: a front-end transmission line transformer 281 (17th transmission line transformer) connected to a duplexer 150 (1st duplexer) that distinguishes between the received signal and the amplified signal RFamp1 (1st signal), performing impedance transformation at a given transformation ratio (11th transformation ratio); a front-end transmission line transformer 281 (18th transmission line transformer) connected to a duplexer 150 (2nd duplexer) that distinguishes between the received signal and the amplified signal RFamp2 (2nd signal), performing impedance transformation at a given transformation ratio (11th transformation ratio); and an antenna switch 282, comprising a circuit through the front-end transmission line transformer 281. The power amplifier module 200 is miniaturized by the following connections: the 11th input terminal of the 81 (17th transmission line transformer) to receive the amplified signal RFamp1 (1st signal); the 12th input terminal of the 281 (18th transmission line transformer) to receive the amplified signal RFamp2 (2nd signal); the 4th output terminal connected to the antenna ANT1 (1st antenna); the 5th output terminal connected to the antenna ANT2 (2nd antenna), which is different from the antenna ANT1 (1st antenna); and the 6th output terminal connected to the synthesis terminal 284 of the synthesized amplified signals RFamp1 (1st signal) and RFamp2 (2nd signal).

[0110] Furthermore, the synthesizer 280 of the power amplifier module 200 according to this embodiment includes a subsequent transmission line transformer 283 (19th transmission line transformer) connected between the synthesizing terminal 284 and the output terminal (e.g., the terminal connected to the path switching switch 270) to perform impedance transformation at a given transformation ratio (12th transformation ratio). As a result, the power amplifier module 200 can be miniaturized.

[0111] Furthermore, in the power amplification modules 100 and 200 of this embodiment, the synthesizers 180 and 280 are input with amplified signals RFamp1 (first signal) and RFamp2 (second signal) via first and second frequency band selection switches 140a and 140b, which allocate amplified signals RFamp1 (first signal) and RFamp2 (second signal) according to a given frequency band. This enables the realization of a module suitable for a wide frequency band.

[0112] Furthermore, in the power amplifier module 100 of this embodiment, the combiner 180 receives the amplified signals RFamp1 (first signal) and RFamp2 (second signal) through a duplexer 150 that distributes the amplified signal RFamp1 (first signal) and RFamp2 (second signal) with the received signal. This allows for transmission and reception using the same antenna, thus enabling module miniaturization.

[0113] Furthermore, the input signal RFin in the power amplifier modules 100 and 200 according to this embodiment has a given frequency band of 1710MHz to 2690MHz. By using the first amplifier 110a and the second amplifier 110b, which correspond to a wide frequency band, the number of components can be reduced, thereby enabling module miniaturization.

[0114] The embodiments described above are for the purpose of facilitating understanding of this disclosure and are not intended to limit or interpret this disclosure. This disclosure can be modified or improved without departing from its spirit, and equivalents are also included in this disclosure. That is, any product in which a person skilled in the art makes appropriate design changes to the embodiments, as long as it possesses the features of this disclosure, is also included within the scope of this disclosure. The elements and their configurations in the embodiments are not limited to those illustrated and can be appropriately modified.

Claims

1. A power amplification module, comprising: a first amplifier that amplifies a power level of a first input signal of a given frequency band and outputs a first signal of a first power level; a first impedance converter that is connected to the first amplifier and includes a transmission line transformer; a second amplifier that amplifies a power level of a second input signal of the given frequency band and outputs a second signal of the first power level; and a combiner that combines the first signal input through the first impedance converter and the second signal input through the second impedance converter into an output signal of a second power level that is greater than the first power level, the combiner including a transmission line transformer, the combiner including: a combining terminal that combines the first signal and the second signal; a first transmission line transformer that is connected between the combining terminal and a first input terminal to which the first signal is input, and that performs impedance conversion to make impedance large at a first conversion ratio; a second transmission line transformer that is connected between the combining terminal and a second input terminal to which the second signal is input, and that performs impedance conversion to make impedance large at the first conversion ratio; a third transmission line transformer that is connected between the combining terminal and an output terminal, and that performs impedance conversion to make impedance small at a second conversion ratio; and a first isolation section that is connected between the first input terminal and the second input terminal.

2. The power amplification module according to claim 1, further comprising an antenna switch, the antenna switch including: a first terminal to which the first signal is input through the first impedance converter; a second terminal to which the second signal is input through the second impedance converter; a first output terminal for outputting the first signal to a first antenna; a second output terminal for outputting the second signal to a second antenna that is different from the first antenna; and a third output terminal for outputting the first signal and the second signal to the combiner.

3. A power amplification module, comprising: a first amplifier that amplifies a power level of a first input signal of a given frequency band and outputs a first signal of a first power level; a first impedance converter that is connected to the first amplifier and includes a transmission line transformer; a second amplifier that amplifies a power level of a second input signal of the given frequency band and outputs a second signal of the first power level; and a combiner that combines the first signal input through the first impedance converter and the second signal input through the second impedance converter into an output signal of a second power level that is greater than the first power level, the combiner including a transmission line transformer, the combiner including: a combining terminal that combines the first signal and the second signal; a fourth transmission line transformer that is connected between the combining terminal and a third input terminal to which the first signal is input, and that performs impedance conversion to make impedance small at a third conversion ratio; and a fifth transmission line transformer that is connected between the combining terminal and a fourth input terminal to which the second signal is input, and that performs impedance conversion to make impedance small at the third conversion ratio. ​ a second impedance transformer connected to the second amplifier, comprising a transmission line transformer; ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ a second impedance transformer connected to the second amplifier, comprising a transmission line transformer; ​ ​ ​ ​ ​ ​ A 6th transmission line transformer connected between the synthesis terminal and an output terminal to perform impedance conversion with a 4th conversion ratio to make the impedance large; and A 2nd isolation section connected between the 3rd input terminal and the 4th input terminal.

4. A power amplification module comprising: a 1st amplifier amplifying a power level of a 1st input signal of a given frequency band and outputting a 1st signal of a 1st power level; a 1st impedance converter connected to the 1st amplifier, including a transmission line transformer; a 2nd amplifier amplifying a power level of a 2nd input signal of the given frequency band and outputting a 2nd signal of the 1st power level; a second impedance transformer connected to the second amplifier, comprising a transmission line transformer; and a synthesizer synthesizing the 1st signal input through the 1st impedance converter and the 2nd signal input through the 2nd impedance converter into an output signal of a 2nd power level larger than the 1st power level, including a transmission line transformer, the synthesizer including: a synthesis terminal synthesizing the 1st signal and the 2nd signal; a 7th transmission line transformer performing impedance conversion with a 5th conversion ratio to make the impedance large; an 8th transmission line transformer connected in series with the 7th transmission line transformer through a 1st connection terminal, performing impedance conversion with a 6th conversion ratio to make the impedance small; a 9th transmission line transformer performing impedance conversion with the 5th conversion ratio to make the impedance large; and an 10th transmission line transformer connected in series with the 9th transmission line transformer through a 2nd connection terminal, performing impedance conversion with the 6th conversion ratio to make the impedance small, the 7th transmission line transformer being connected between the 1st connection terminal and a 5th input terminal to which the 1st signal is input, the 8th transmission line transformer being connected between the 1st connection terminal and the synthesis terminal, the 9th transmission line transformer being connected between the 2nd connection terminal and a 6th input terminal to which the 2nd signal is input, the 10th transmission line transformer being connected between the 2nd connection terminal and the synthesis terminal, the synthesizer further including a 3rd isolation section connected between the 5th input terminal and the 6th input terminal.

5. A power amplification module comprising: a 1st amplifier amplifying a power level of a 1st input signal of a given frequency band and outputting a 1st signal of a 1st power level; a 1st impedance converter connected to the 1st amplifier, including a transmission line transformer; a 2nd amplifier amplifying a power level of a 2nd input signal of the given frequency band and outputting a 2nd signal of the 1st power level; and a second impedance transformer connected to the second amplifier, comprising a transmission line transformer; a synthesizer synthesizing the 1st signal input through the 1st impedance converter and the 2nd signal input through the 2nd impedance converter into an output signal of a 2nd power level larger than the 1st power level, including a transmission line transformer, the synthesizer including: a synthesis terminal synthesizing the 1st signal and the 2nd signal; a 11th transmission line transformer performing impedance conversion with a 7th conversion ratio to make the impedance small; ​ a 12th transmission line transformer connected in series with the 11th transmission line transformer through a 3rd connection terminal, and performing impedance conversion with the 8th conversion ratio to make the impedance large; a 13th transmission line transformer performing impedance conversion with the 7th conversion ratio to make the impedance small; and a 14th transmission line transformer connected in series with the 13th transmission line transformer through a 4th connection terminal, and performing impedance conversion with the 8th conversion ratio to make the impedance large, the 11th transmission line transformer is connected between the 3rd connection terminal and a 7th input terminal to which the 1st signal is input, the 12th transmission line transformer is connected between the 3rd connection terminal and the combining terminal, the 13th transmission line transformer is connected between the 4th connection terminal and an 8th input terminal to which the 2nd signal is input, the 14th transmission line transformer is connected between the 4th connection terminal and the combining terminal, the combiner further includes a 4th isolation section connected between the 7th input terminal and the 8th input terminal.

6. A power amplification module comprising: a 1st amplifier amplifying a power level of a 1st input signal of a given frequency band and outputting a 1st signal of a 1st power level; a 1st impedance converter connected to the 1st amplifier, including a transmission line transformer; a 2nd amplifier amplifying a power level of a 2nd input signal of the given frequency band and outputting a 2nd signal of the 1st power level; and a combiner combining the 1st signal input through the 1st impedance converter and the 2nd signal input through the 2nd impedance converter into an output signal of a 2nd power level larger than the 1st power level, including a transmission line transformer, a second impedance transformer connected to the second amplifier, comprising a transmission line transformer; the combiner including: a combining terminal combining the 1st signal and the 2nd signal; a 15th transmission line transformer having a 1st end connected to a 9th input terminal and inputting the 1st signal, a 2nd end connected to a 10th input terminal and inputting the 2nd signal, and a 3rd end connected to the combining terminal, and performing impedance conversion with a 9th conversion ratio to make the impedance small; a 16th transmission line transformer connected in series with the 15th transmission line transformer through the combining terminal, connected between the combining terminal and an output terminal, and performing impedance conversion with a 10th conversion ratio to make the impedance large; and a 5th isolation section connected between the 9th input terminal and the 10th input terminal.

7. The power amplification module according to any one of claims 1 to 6, wherein the combiner is input with the 1st signal and the 2nd signal through a duplexer that divides the 1st signal and the 2nd signal and a received signal received.

8. A power amplification module comprising: a 1st amplifier amplifying a power level of a 1st input signal of a given frequency band and outputting a 1st signal of a 1st power level; a 1st impedance converter connected to the 1st amplifier, including a transmission line transformer; a 2nd amplifier amplifying a power level of a 2nd input signal of the given frequency band and outputting a 2nd signal of the 1st power level; and a combiner combining the 1st signal input through the 1st impedance converter and the 2nd signal input through the 2nd impedance converter into an output signal of a 2nd power level larger than the 1st power level, including a transmission line transformer, the combiner including: a combining terminal combining the 1st signal and the 2nd signal; a 15th transmission line transformer having a 1st end connected to a 9th input terminal and inputting the 1st signal, a 2nd end connected to a 10th input terminal and inputting the 2nd signal, and a 3rd end connected to the combining terminal, and performing impedance conversion with a 9th conversion ratio to make the impedance small; a 16th transmission line transformer connected in series with the 15th transmission line transformer through the combining terminal, connected between the combining terminal and an output terminal, and performing impedance conversion with a 10th conversion ratio to make the impedance large; and a 5th isolation section connected between the 9th input terminal and the 10th input terminal. a second amplifier that amplifies a power level of a second input signal of the given frequency band and outputs a second signal of the first power level; a second impedance transformer connected to the second amplifier, comprising a transmission line transformer; and a combiner that combines the first signal input through the first impedance transformer and the second signal input through the second impedance transformer into an output signal of a second power level that is greater than the first power level, including a transmission line transformer, the combiner including: a seventeenth transmission line transformer connected to a first duplexer that distinguishes between a received signal and the first signal to perform impedance conversion at an eleventh conversion ratio; an eighteenth transmission line transformer connected to a second duplexer that distinguishes between the received signal and the second signal to perform impedance conversion at the eleventh conversion ratio; and an antenna switch including an eleventh input terminal to which the first signal is input through the seventeenth transmission line transformer, a twelfth input terminal to which the second signal is input through the eighteenth transmission line transformer, a fourth output terminal connected to a first antenna, a fifth output terminal connected to a second antenna that is different from the first antenna, and a sixth output terminal connected to a combining terminal that combines the first signal and the second signal.

9. The power amplification module according to claim 8, wherein the combiner includes a nineteenth transmission line transformer connected between the combining terminal and an output terminal to perform impedance conversion at a twelfth conversion ratio.

10. The power amplification module according to any one of claims 1 to 6, 8 and 9, wherein the combiner is input with the first signal and the second signal through a band selection switch that distributes the first signal and the second signal according to the given frequency band.

11. The power amplification module according to any one of claims 1 to 6, 8 and 9, wherein the given frequency band is a frequency band of 1710 MHz to 2690 MHz.

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