Power amplification device, radio frequency front-end equipment and mobile terminal

Abstract

The utility model discloses a power amplification device, radio frequency front-end equipment and a mobile terminal, and relates to the communication field, the power amplification device comprises an intermediate frequency power amplification module, the intermediate frequency power amplification module is internally provided with a receiving and transmitting mode change-over switch, the receiving and transmitting mode change-over switch comprises a mode switching contact, a transmitting contact and a receiving contact, when the mode switching contact is connected with the transmitting contact, the intermediate-frequency power amplification module is in a signal transmitting mode, and when the mode switching contact is connected with the receiving contact, the intermediate-frequency power amplification module is in a signal receiving mode, so that the intermediate-frequency power amplification module is in a signal receiving mode through a built-in receiving and transmitting mode switching switch. According to the technical scheme, switching of receiving and transmitting can be achieved in the intermediate frequency power amplification module without an external change-over switch, switching of signal receiving and transmitting can be achieved, an external switch does not need to be independently arranged on a circuit board, and the layout cost of the circuit board is reduced. The technical problem of high layout cost of a circuit board is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication technical field especially relates to power amplifier device, radio frequency front -end equipment and mobile terminal. BACKGROUND

[0002] In the field of mobile communication, power amplifier (PA, Power Amplifier) as radio frequency front -end core device, its performance directly influences signal transmission efficiency and communication quality. In order to meet the basic communication demand, the transmitting port of intermediate frequency is usually arranged in power amplifier. However, in the application scene of intermediate frequency TDD (Time Division Duplexing, time division duplexing) frequency band, it needs to rely on external switch to realize the switching of signal transmission and reception. The external switch needs to be independently laid out on the circuit board, and then the layout cost of the circuit board is increased.

[0003] The above content is only used to assist understanding the technical scheme of the utility model, and does not represent that the above content is prior art. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a kind of power amplifier device, radio frequency front -end equipment and mobile terminal, to solve the technical problem of high circuit layout cost.

[0005] To achieve the above-mentioned purpose, the utility model provides a kind of power amplifier device, the power amplifier device includes intermediate frequency power amplifier module, the intermediate frequency power amplifier module is built-in receiving transmitting mode switch, and the receiving transmitting mode switch includes mode switch contact, transmitting contact and receiving contact;

[0006] In the mode switch contact connects transmitting contact case, the intermediate frequency power amplifier module is in signal transmission mode;

[0007] In the mode switch contact connects receiving contact case, the intermediate frequency power amplifier module is in signal receiving mode.

[0008] In an embodiment, the package port of the intermediate frequency power amplifier module includes intermediate frequency receiving port and intermediate frequency transmitting port, the intermediate frequency receiving port is connected with the receiving contact, and the mode switch contact is connected with the intermediate frequency transmitting port.

[0009] In an embodiment, in the mode switch contact of receiving transmitting mode switch and the transmitting contact are closed, the mode switch contact and the receiving contact are disconnected case, the intermediate frequency transmitting port of the intermediate frequency power amplifier module emits signal;

[0010] In the case that the mode switching contact of the receiving-transmitting mode switching switch is closed with the receiving contact and is disconnected with the transmitting contact, the intermediate frequency transmitting port of the intermediate frequency power amplification module receives signals, and the signals received from the intermediate frequency transmitting port are output from the intermediate frequency receiving port.

[0011] In an embodiment, the intermediate frequency power amplification module further comprises an intermediate frequency band selection switch connected with the receiving-transmitting mode switching switch.

[0012] In an embodiment, the intermediate frequency band selection switch comprises a plurality of intermediate frequency band contacts, each of which is connected with a receiving contact and a transmitting contact in the receiving-transmitting mode switching switch.

[0013] In an embodiment, the receiving contact comprises a plurality of receiving sub-contacts, the transmitting contact comprises a plurality of transmitting sub-contacts, the mode switching contact comprises a plurality of sub-switching contacts, the intermediate frequency transmitting port comprises a plurality of sub-transmitting ports, the number of the receiving sub-contacts, the number of the transmitting sub-contacts, the number of the sub-switching contacts, the number of the sub-transmitting ports and the number of the intermediate frequency band contacts are the same.

[0014] Each of the intermediate frequency band contacts is connected with a corresponding receiving sub-contact and the transmitting sub-contact, the number of the receiving sub-contacts connected with each of the intermediate frequency band contacts is 1, the number of the transmitting sub-contacts connected with each of the intermediate frequency band contacts is 1, each of the sub-switching contacts is connected with a corresponding sub-transmitting port, and the number of the sub-transmitting ports connected with each of the sub-switching contacts is 1.

[0015] In an embodiment, the power amplification device further comprises a low frequency power amplification module, and the low frequency power amplification module is independently packaged.

[0016] In an embodiment, the power amplification device further comprises a high frequency power amplification module, the intermediate frequency power amplification module and the high frequency power amplification module of the power amplification device are integrated into a medium-high frequency power amplification module, and the medium-high frequency power amplification module is independently packaged.

[0017] In addition, in order to achieve the above object, the utility model provides a radio frequency front-end equipment, the radio frequency front-end equipment includes the power amplification device as described above.

[0018] In addition, in order to achieve the above object, the utility model provides a mobile terminal, the mobile terminal includes the power amplification device as described above.

[0019] The utility model discloses beneficial effect is: because the utility model discloses power amplifier device's intermediate frequency power amplifier module built -in receiving emission mode switch, and receiving emission mode switch includes mode switch contact, emission contact and receiving contact, when mode switch contact connects emission contact, intermediate frequency power amplifier module is in signal emission mode, when mode switch contact connects receiving contact, intermediate frequency power amplifier module is in signal receiving mode, to be able to realize receiving and emission's switching in intermediate frequency power amplifier module through built -in receiving emission mode switch, and need not external switch, can realize signal transceiver's switching, thereby also need not independent layout external switch on the circuit board, has reduced the layout cost of circuit board. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings incorporated in and forming a part of the specification, illustrate embodiments consistent with the present utility model and serve to explain the principles of the utility model, together with the description.

[0021] In order to more clearly illustrate the technical scheme in the embodiment or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows, and obviously, other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is the module schematic view of the embodiment of the utility model power amplifier device;

[0023] Figure 2 It is the connection schematic view between receiving emission mode switch and port in the utility model power amplifier device;

[0024] Figure 3 It is the module schematic view of intermediate frequency power amplifier module of another embodiment of the utility model power amplifier device;

[0025] Figure 4 It is the structure schematic view of the corresponding intermediate frequency band selection switch of the utility model power amplifier device;

[0026] Figure 5 It is the structure schematic view of the corresponding receiving emission mode switch of the utility model power amplifier device;

[0027] Figure 6 It is the specific connection schematic view of receiving emission mode switch and intermediate frequency band selection switch in the utility model power amplifier device;

[0028] Figure 7 It is the module structure schematic view of including low frequency power amplifier module, intermediate frequency power amplifier module and high frequency power amplifier module in the utility model power amplifier device;

[0029] Figure 8 The utility model discloses a high frequency power amplification module corresponding to the packaging port schematic diagram of power amplification device one example.

[0030] The utility model discloses the realization, function characteristics and advantages will combine embodiment, and make further explanation with reference to the drawings.

[0031] Explanation of the drawings:

[0032] 100, intermediate frequency power amplification module;110, receive transmission mode switch;120, intermediate frequency band selection switch;113, emission contact;112, receiving contact;111, mode switching contact;1000, power amplification device;200, low frequency power amplification module;300, high frequency power amplification module;400, intermediate frequency power amplification module;MBRX, intermediate frequency receiving port;MBTX, intermediate frequency transmitting port;MBD, intermediate frequency amplification unit;X0, band selection contact;X1-X4, each intermediate frequency band contact;F1-F4, each emission subcontact;J1-J4, each receiving subcontact;Q1-Q4, each sub switching contact;MB1-MB4, each sub transmitting port;K, switch;HBRX, high frequency receiving signal port;RFIN_H, high frequency radio frequency input port;RFIN_M1, first intermediate frequency radio frequency input port;RFIN_M2, second intermediate frequency radio frequency input port;HB1-HB4, each high frequency band port. DETAILED DESCRIPTION

[0033] It should be understood that the specific embodiments described herein merely exemplify the technical solutions of the utility model, and are not used to limit the utility model.

[0034] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments are merely used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications will also change accordingly.

[0035] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0036] For better understanding of the technical scheme of the utility model, the following will be combined with the description and specific implementation mode to make detailed description.

[0037] In the mobile communication module, the power amplifier is one of the most critical radio frequency front-end devices. The current radio frequency front-end, for the Sub-3GHz (Sub-3 Gigahertz lower than 3 gigahertz) frequency band, usually adopts the architecture of PA + duplexer + switch + frequency divider. Among them, the packaging size of PA is unified as 4mm*6.8mm in the industry, and the multi-frequency band support function of low frequency band (less than 1GHz) and medium-high frequency band (greater than 1GHz and less than 3GHz) is integrated in the package. Among them, only the transmission port of the intermediate frequency is set in the intermediate frequency, however, in the application scene of the intermediate frequency TDD (Time Division Duplexing) frequency band, the switching of signal transmission and reception is needed, which makes it necessary to set an external switch outside the power amplifier to realize the switching of the transmission and reception channels, and the external switch needs to be independently laid out on the circuit board, which not only increases the layout area, but also increases the circuit cost.

[0038] Therefore, the utility model provides a kind of power amplification device, because the intermediate frequency power amplification module in the power amplification device of the utility model is built-in receiving transmission mode switch, and receiving transmission mode switch includes mode switching contact, transmission contact and receiving contact, when mode switching contact connects transmission contact, intermediate frequency power amplification module is in signal transmission mode, when mode switching contact connects receiving contact, intermediate frequency power amplification module is in signal receiving mode, so as to realize the switching of receiving and transmitting in intermediate frequency power amplification module by built-in receiving transmission mode switch, without external switching switch, to realize the switching of signal transmission and reception, so as to also not need to independently lay out external switch on circuit board, reduce the layout cost of circuit board.

[0039] Based on this, the embodiment provides a kind of power amplification device 1000, refer to Figure 1 The power amplification device 1000 includes intermediate frequency power amplification module 100, and the intermediate frequency power amplification module 100 is built-in receiving transmission mode switch 110;

[0040] The receiving transmission mode switch 110 includes mode switching contact 111, transmission contact 113 and receiving contact 112;

[0041] In the case where the mode switching contact 111 connects the transmission contact 113, the intermediate frequency power amplification module is in signal transmission mode;

[0042] In the case where the mode switching contact 111 connects the receiving contact 112, the intermediate frequency power amplification module is in signal receiving mode.

[0043] It should be noted that the power amplification device can support the intermediate frequency band, and in other embodiments, the power amplification device can also support the low frequency band, the intermediate frequency band and the high frequency band at the same time. The intermediate frequency power amplification module 100 can be a power amplifier for amplifying signals of the intermediate frequency band. The power amplification device can be arranged on a PCB (Printed Circuit Board).

[0044] The low frequency band, the intermediate frequency band and the high frequency band can be divided according to the frequency. The frequency range of the low frequency band is smaller than the frequency range of the intermediate frequency band, and also smaller than the frequency range of the high frequency band.

[0045] The low frequency band usually refers to a frequency band with a frequency range of 30MHz to 1GHz. The low frequency signal has a longer wavelength and smaller propagation loss, and is suitable for wide area coverage (such as rural and remote areas). The low frequency signal has strong penetration ability: the low frequency signal can better penetrate buildings and other obstacles, and is suitable for indoor deep coverage. The intermediate frequency band usually refers to a frequency band with a frequency range of 1GHz to 3GHz. The intermediate frequency band can provide a larger bandwidth and support a higher data transmission rate. The high frequency band usually refers to a frequency band with a frequency range of 3GHz to 6GHz. The high frequency band can provide a larger bandwidth and support a higher data transmission rate, but the high frequency signal has a shorter wavelength and larger propagation loss.

[0046] The receiving and transmitting mode switching switch 110 can switch the signal transmission and reception in the intermediate frequency power amplification module 100, so that the external switch is not needed to realize the switching of the signal transmission and reception. Referring to Figure 1 , Figure 1 The connection between the mode switching contact and the receiving contact is a dashed line, and the connection between the mode switching contact and the transmitting contact is a dashed line. The dashed line indicates that the mode switching contact is not fixedly connected to the receiving contact, and the mode switching contact is not fixedly connected to the transmitting contact. The mode switching contact can switch the connection between the receiving contact and the transmitting contact.

[0047] The signal transmission mode refers to that the port corresponding to the mode switching contact in the intermediate frequency power amplification module transmits the amplified intermediate frequency signal outward, and the signal reception mode refers to that the port corresponding to the mode switching contact in the intermediate frequency power amplification module receives the intermediate frequency signal. The port corresponding to the mode switching contact is the corresponding packaged port in the intermediate frequency power amplification module. In this embodiment, the port corresponding to the mode switching contact is the intermediate frequency transmission port, and it can be understood that the intermediate frequency transmission port can receive signals or transmit signals.

[0048] The power amplification device in the embodiment has a built-in receive-transmit mode switching switch in the intermediate frequency power amplification module, and the receive-transmit mode switching switch includes a mode switching contact, a transmit contact and a receive contact. When the mode switching contact is connected to the transmit contact, the intermediate frequency power amplification module is in a signal transmitting mode. When the mode switching contact is connected to the receive contact, the intermediate frequency power amplification module is in a signal receiving mode. Thus, the receive and transmit switching can be realized in the intermediate frequency power amplification module through the built-in receive-transmit mode switching switch, and the signal receiving and transmitting switching can be realized without an external switching switch, so that an external switch does not need to be independently laid out on the circuit board, thereby reducing the layout cost of the circuit board. Meanwhile, the complexity of the front-end radio frequency can be reduced.

[0049] In a feasible embodiment, please refer to Figure 2 , the packaging port of the intermediate frequency power amplification module 100 includes an intermediate frequency receiving port MBRX and an intermediate frequency transmitting port MBTX. The intermediate frequency receiving port MBRX is connected to the receive contact 112, and the mode switching contact 111 is connected to the intermediate frequency transmitting port MBTX.

[0050] It should be noted that the intermediate frequency transmitting port MBTX can be used to transmit the amplified intermediate frequency signal, and the intermediate frequency transmitting port MBTX can also be used to receive the signal in the intermediate frequency band. The intermediate frequency receiving port MBRX can be used to output the signal received by the intermediate frequency transmitting port MBTX. The receive contact 112 is connected to the intermediate frequency receiving port, and the mode switching contact 111 is connected to the intermediate frequency transmitting port MBTX. When the mode switching contact 111 is connected to the transmit contact 113, the intermediate frequency transmitting port MBTX is used to transmit the amplified intermediate frequency signal. When the mode switching contact 111 is connected to the receive contact 112, the intermediate frequency transmitting port MBTX is used to receive the signal in the intermediate frequency band, and the intermediate frequency receiving port MBRX is used to output the signal received by the intermediate frequency transmitting port MBTX.

[0051] For better understanding of the connection relationship between the intermediate frequency receiving port and the intermediate frequency transmitting port and the receive-transmit mode switching switch, please refer to Figure 2 , Figure 2 The other forms of the receive contact, the transmit contact and the mode switching contact are shown in

[0052] The packaging port is the port when the power amplification device is packaged. The power amplification device can have multiple packaging ports, and the embodiment does not make specific limitations thereto. The embodiment sets the receiving and transmitting mode switching switch 110 in the intermediate frequency power amplification module 100, and the corresponding intermediate frequency receiving port and intermediate frequency transmitting port are also packaged when packaging, so as to realize the integration of the receiving and transmitting mode switching switch 110 in the intermediate frequency power amplification module 100, reduce the layout area, and also reduce the layout cost. TDD is a technology for realizing bidirectional communication. The data uplink and data downlink of TDD use the same frequency band. In order to avoid signal conflict, the receiving and transmitting operations cannot be performed at the same time, so the receiving and transmitting operations need to be performed at different times to complete the bidirectional communication. Therefore, the integration of the receiving and transmitting mode switching switch 110 in the intermediate frequency power amplification module 100 can reduce the layout area and also reduce the circuit cost.

[0053] In a feasible embodiment, when the mode switching contact 111 of the receiving and transmitting mode switching switch 110 is closed with the transmitting contact 113 and the mode switching contact 111 is disconnected with the receiving contact 112, the intermediate frequency transmitting port MBTX of the intermediate frequency power amplification module 100 transmits a signal.

[0054] In a feasible embodiment, when the mode switching contact 111 of the receiving and transmitting mode switching switch 110 is closed with the receiving contact 112 and the mode switching contact 111 is disconnected with the transmitting contact 113, the intermediate frequency transmitting port MBTX of the intermediate frequency power amplification module 100 receives a signal, and the signal received from the intermediate frequency transmitting port MBTX is output from the intermediate frequency receiving port MBRX.

[0055] It should be noted that the receiving and transmitting mode switching switch 110 can switch the receiving channel and the transmitting channel of the intermediate frequency power amplification module 100. When the mode switching contact 111 is closed with the transmitting contact 113, the mode switching contact 111 is disconnected with the receiving contact 112. At this time, the intermediate frequency transmitting port MBTX transmits the amplified intermediate frequency signal. When the mode switching contact 111 is closed with the receiving contact 112, the mode switching contact 111 is disconnected with the transmitting contact 113. At this time, the intermediate frequency transmitting port MBTX receives the signal of the intermediate frequency band and directly outputs from the intermediate frequency receiving port MBRX.

[0056] Therefore, the mode switching contact 111, the transmitting contact 113, and the receiving contact 112 in the receiving and transmitting mode switching switch 110 can switch the signal receiving and transmitting without an external switching switch.

[0057] Further, in a feasible embodiment, referring to Figure 3The intermediate frequency power amplification module 100 further comprises an intermediate frequency band selection switch 120 connected to the receiving and transmitting mode switching switch 110.

[0058] It should be noted that the intermediate frequency band selection switch 120 is used to select different intermediate frequency bands, and the total intermediate frequency band range can be subdivided into a plurality of subdivided intermediate frequency bands. The intermediate frequency band selection switch 120 can select a corresponding subdivided intermediate frequency band, and then the corresponding intermediate frequency transmitting port MBTX can transmit and receive signals belonging to the subdivided intermediate frequency band. The intermediate frequency band selection switch 120 can be connected to the mode switching switch of the receiving and transmitting mode. The intermediate frequency transmitting port MBTX can also comprise a plurality of sub-transmitting ports. Each sub-transmitting port can also be used for signal transmission and reception.

[0059] In addition, it should be noted that the intermediate frequency power amplification module 100 further comprises an intermediate frequency amplification unit MBD, which can amplify intermediate frequency signals. The intermediate frequency amplification unit MBD can be connected to the intermediate frequency band selection switch 120. The intermediate frequency band selection switch 120 can select a corresponding sub-transmitting port for signal transmission based on the subdivided intermediate frequency band to which the amplified intermediate frequency signal belongs. When transmitting the intermediate frequency signal amplified by the intermediate frequency amplification unit MBD, the mode switching switch in the receiving and transmitting mode switching switch 110 is closed with the transmitting contact 113.

[0060] In the embodiment, the frequency band selection switch is provided, so that different subdivided intermediate frequency bands can be supported, and different communication requirements can be met.

[0061] In a feasible embodiment, please refer to Figure 4 The intermediate frequency band selection switch 120 comprises a plurality of intermediate frequency band contacts, each of which is connected to the receiving contact 112 and the transmitting contact 113.

[0062] It should be noted that the intermediate frequency band selection switch 120 further comprises a frequency band selection contact x0, the number of which is 1, and the intermediate frequency band contacts can be multiple. The frequency band selection contact x0 is closed with different intermediate frequency band contacts, so that different subdivided intermediate frequency bands can be selected. Each intermediate frequency band contact is connected to the transmitting contact 113 and the receiving contact 112. Thus, the intermediate frequency receiving port MBRX corresponding to the receiving contact 112 can also output signals of different subdivided intermediate frequency bands, and the intermediate frequency transmitting port MBTX corresponding to the transmitting contact 113 can also receive and transmit signals of different subdivided intermediate frequency bands, so that different communication requirements can be met.

[0063] In addition, it should be noted that the intermediate frequency power amplification module 100 further comprises an intermediate frequency amplification unit MBD, the intermediate frequency amplification unit MBD can amplify signals of the intermediate frequency band, the intermediate frequency amplification unit MBD can be connected to the intermediate frequency band selection switch 120, and the intermediate frequency band selection switch 120 can select a corresponding sub-transmission port for signal transmission based on the subdivided intermediate frequency band to which the amplified intermediate frequency signal belongs. When the intermediate frequency amplification unit MBD amplifies the intermediate frequency signal, the mode switching switch in the receiving and transmitting mode switching switch 110 is closed with the transmitting contact 113.

[0064] For example, in Figure 4 , the number of intermediate frequency band contacts can be 4, which are x1-x4. MBD is an intermediate frequency amplification unit MBD. x0 is a frequency band selection contact x0.

[0065] Further, in another possible embodiment, please refer to Figure 5 and Figure 6 , the receiving contact 112 comprises a plurality of receiving sub-contacts, the transmitting contact 113 comprises a plurality of transmitting sub-contacts, the mode switching contact 111 comprises a plurality of sub-switching contacts, the intermediate frequency transmission port MBTX comprises a plurality of sub-transmission ports, the number of receiving sub-contacts, the number of transmitting sub-contacts, the number of sub-switching contacts, the number of sub-transmission ports and the number of said intermediate frequency band contacts are the same;

[0066] Each of the intermediate frequency band contacts is connected to a corresponding receiving sub-contact and the transmitting sub-contact, the number of receiving sub-contacts connected by each of the intermediate frequency band contacts is 1, the number of transmitting sub-contacts connected by each of the intermediate frequency band contacts is 1, each of the sub-switching contacts is connected to a corresponding sub-transmission port, and the number of sub-transmission ports connected by each sub-switching contact is 1.

[0067] It should be noted that the receiving contact 112 can comprise 4 receiving sub-contacts, the transmitting sub-contact can also comprise 4 transmitting sub-contacts, the mode switching contact 111 can also comprise 4 sub-switching contacts, and the intermediate frequency transmission port MBTX can also comprise 4 sub-transmission ports. The intermediate frequency receiving port MBRX is 1. Each intermediate frequency band contact corresponds to a receiving sub-contact and a transmitting sub-contact one by one, and the sub-switching contact corresponds to a receiving sub-contact and a transmitting sub-contact one by one. In the receiving and transmitting mode switching switch, the same sub-switching contact cannot be connected to the sub-transmission contact and the sub-receiving contact at the same time. The intermediate frequency band selection switch 120 can be a multi-pole switch, and the frequency band selection contact x0 in the intermediate frequency band selection switch 120 can be closed with different intermediate frequency band contacts. The intermediate frequency band contacts closed by the frequency band selection contact x0 are different, the subdivided intermediate frequency band to which the signal received by the intermediate frequency power amplification module 100 belongs is different, and the subdivided intermediate frequency band to which the signal transmitted by the intermediate frequency power amplification module 100 belongs is different.

[0068] For each target intermediate frequency band contact in the intermediate frequency band selection switch 120, the target intermediate frequency band contact is any intermediate frequency band contact in the intermediate frequency band selection switch 120. When the frequency band selection contact x0 is closed with the target intermediate frequency band contact, if the target sub-emission contact connected with the target intermediate frequency band contact is closed with the target sub-switching contact corresponding to the target sub-emission contact, the signal amplified by the intermediate frequency amplification unit MBD can be emitted from the sub-emission port corresponding to the sub-switching contact. If the target sub-reception contact connected with the target intermediate frequency band contact is closed with the target sub-switching contact, the target sub-emission port connected with the target sub-switching contact can receive the signal of the subdivided intermediate frequency band corresponding to the target sub-emission port, and can output the signal of the intermediate frequency band received by the target sub-emission port from the intermediate frequency reception port MBRX. Wherein, the same sub-switching contact cannot be connected with the corresponding sub-reception contact j and sub-emission contact f at the same time.

[0069] For example, referring to Figure 5 , Figure 5 There are four reception sub-contacts in the figure, which are j1-j4, and j1-j4 are connected with the intermediate frequency reception port MBRX. Figure 5 The figure shows four emission sub-contacts, which are f1-f4, four sub-switching contacts, which are q1-q4, and four sub-emission ports, which are MB1-MB4. Among them, the sub-switching contact q1 is connected with the sub-emission port MB1, the sub-switching contact q2 is connected with the sub-emission port MB2, the sub-switching contact q3 is connected with the sub-emission port MB3, and the sub-switching contact q4 is connected with the sub-emission port MB4. Please refer to Figure 6 , Figure 6 The figure shows the specific connection diagram of the reception and emission mode switching switch 110 and the intermediate frequency band selection switch 120. Among them, the intermediate frequency band contact x1 is connected with the sub-emission contact f1, the intermediate frequency band contact x2 is connected with the sub-emission contact f2, the intermediate frequency band contact x3 is connected with the sub-emission contact f3, and the intermediate frequency band contact x4 is connected with the sub-emission contact f4. When the frequency band selection contact x0 in the intermediate frequency band selection switch 120 is closed with the intermediate frequency band contact x1, if the mode selection contact q1 is closed with the sub-emission contact f1, the signal amplified by the intermediate frequency amplification unit MBD can be emitted from the sub-emission port MB1; if the mode selection contact q1 is closed with the sub-reception contact j1, the sub-emission port MB1 can receive the signal of the subdivided intermediate frequency band corresponding to the sub-emission port MB1, and can output the signal of the intermediate frequency band received by the sub-emission port MB1 from the intermediate frequency reception port MBRX. Thus, for the intermediate frequency TDD band, the conversion of signal reception and emission can be realized without external switch. Among them, Figure 6The middle K is a switch, K can refer to the middle frequency band selection switch 120 and the overall of the receiving and transmitting mode switch 110, it can be understood that the middle frequency band selection switch 120 and the receiving and transmitting mode switch 110 can be regarded as a whole.

[0070] Further, please refer to Figure 7 In another possible embodiment, the power amplification device further comprises a low-frequency power amplification module 200, and the low-frequency power amplification module 200 is independently packaged.

[0071] In a possible embodiment, the power amplification device further comprises a high-frequency power amplification module 300, and the middle-frequency power amplification module 100 and the high-frequency power amplification module 300 of the power amplification device are integrated into a middle-high-frequency power amplification module 400, and the middle-high-frequency power amplification module 400 is independently packaged.

[0072] It should be noted that the low-frequency power amplification module can be used to amplify signals of a low-frequency frequency band, and the high-frequency power amplification module can be used to amplify signals of a high-frequency frequency band. The low-frequency power amplification module can be a power amplifier used to amplify signals of a low-frequency frequency band, and the high-frequency power amplification module can be a power amplifier used to amplify signals of a high-frequency frequency band.

[0073] In the embodiment, the low-frequency power amplification module can be independently packaged, and the middle-high-frequency power amplification module can also be independently packaged. In other embodiments, the low-frequency power amplification module, the middle-frequency power amplification module 100, and the high-frequency power amplification module can be packaged together. The embodiment does not make specific limitations in this regard.

[0074] When the low-frequency power amplification module and the middle-high-frequency power amplification module are independently packaged, the low-frequency power amplification module does not interfere with the middle-high-frequency power module when amplifying low-frequency signals of a low-frequency frequency band, thereby improving the signal processing quality of the power amplification device. The packaging size corresponding to the low-frequency power amplification module and the middle-high-frequency power amplification module can be the same. The packaging size corresponding to the low-frequency power amplification module and the middle-high-frequency power amplification module is 3 mm x 3 mm. The low-frequency power amplification module and the middle-high-frequency power amplification module can be packaged by using the same packaging mold, which can save the cost of manufacturing the mold.

[0075] In addition, since the packaging size of the power amplification module integrating low, middle, and high frequencies is 4 mm x 6.8 mm, the low-frequency power amplification module and the middle-high-frequency power amplification module can be independently packaged in the embodiment, so that the packaging size can be reduced, the layout of the low-frequency power amplification module and the middle-high-frequency power amplification module on the circuit board can be more flexible, and the isolation degree between the low frequency and the middle-high frequency is also increased.

[0076] Further, for better understanding of the packaging port provided in the embodiment, please refer to Figure 8 When the intermediate frequency power amplification module 100 and the high frequency power amplification module are integrated together, the packaging diagram corresponding to the high frequency power amplification module corresponding to the power amplification device. The high frequency power amplification module has 23 pins, and the 23 pins correspond to 23 packaging ports, respectively. Among them, the packaging port corresponding to each pin is respectively SCLK: serial clock port, used for synchronous data transmission. SDATA: serial data port, used for transmitting data, VIO: I / O voltage pin, used for setting the voltage level of the input / output signal, VBAT: battery voltage input port, which can be used for direct connection of battery power supply, MB1-MB4: sub-emission port, HB1-HB4: high frequency band port. VCC1, VCC2 are power input ports, usually used to provide working voltage, GND represents the ground port. RFIN_H is a high frequency radio frequency input port RFIN_H, RFIN_M1 is a first intermediate frequency radio frequency input port RFIN_M1, and RFIN_M2 is a second intermediate frequency radio frequency input port RFIN_M2. HBRX is a high frequency receive signal port, and MBRX is an intermediate frequency receive signal port.

[0077] The high frequency radio frequency input port RFIN_H is used to receive a high frequency radio frequency signal so that the high frequency power amplification module can amplify the high frequency radio frequency signal. The high frequency receive signal port is used to receive the high frequency receive signal fed back by the antenna. The number of high frequency band ports can also be multiple, for example, there can be 4 high frequency band ports, and the 4 high frequency band ports can support different high frequency bands respectively. The high frequency band corresponding to each high frequency band port can be set based on actual conditions, and the embodiment does not make specific limitation. The intermediate frequency radio frequency input port can include a first intermediate frequency radio frequency input port and a second intermediate frequency radio frequency input port. The first intermediate frequency radio frequency input port and the second intermediate frequency radio frequency input port can be used to receive an intermediate frequency radio frequency signal so that the intermediate frequency power amplification module 100 can amplify the intermediate frequency radio frequency signal. The intermediate frequency receive signal port can be used to receive the intermediate frequency receive signal fed back by the antenna, and the first intermediate frequency radio frequency input port and the second intermediate frequency radio frequency input port can transmit the received intermediate frequency radio frequency signal to the intermediate frequency amplification unit for the intermediate frequency amplification unit to amplify the intermediate frequency radio frequency signal. The intermediate frequency radio frequency signal is a signal belonging to the intermediate frequency band that needs to be amplified.

[0078] In addition, the embodiment also provides a radio frequency front-end device, which includes the power amplification device provided in the above embodiment.

[0079] Since the radio frequency front-end device provided in the embodiment comprises the power amplification device provided in the above embodiment, the radio frequency front-end device has the beneficial effects provided in the above embodiment.

[0080] In addition, the embodiment further provides a mobile terminal, which comprises the power amplification device provided in the above embodiment.

[0081] Since the mobile terminal provided in the embodiment comprises the power amplification device provided in the above embodiment, the mobile terminal has the beneficial effects provided in the above embodiment.

[0082] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and equivalent structures or equivalent process transformations using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent processing range of the utility model.

Claims

1. A power amplifying device, characterized by comprising: The power amplification device comprises an intermediate frequency power amplification module, the intermediate frequency power amplification module is internally provided with a receiving and transmitting mode switching switch, the receiving and transmitting mode switching switch comprises a mode switching contact, a transmitting contact and a receiving contact; In a case where the mode switching contact is connected to the transmitting contact, the intermediate frequency power amplification module is in a signal transmitting mode; In a case where the mode switching contact is connected to the receiving contact, the intermediate frequency power amplification module is in a signal receiving mode.

2. The power amplifying device of claim 1, wherein The packaging port of the intermediate frequency power amplification module comprises an intermediate frequency receiving port and an intermediate frequency transmitting port, the intermediate frequency receiving port is connected to the receiving contact, and the mode switching contact is connected to the intermediate frequency transmitting port.

3. The power amplifying device of claim 2, wherein In a case where the mode switching contact of the receiving and transmitting mode switching switch is closed to the transmitting contact and the mode switching contact is disconnected to the receiving contact, the intermediate frequency transmitting port of the intermediate frequency power amplification module transmits a signal; In a case where the mode switching contact of the receiving and transmitting mode switching switch is closed to the receiving contact and the mode switching contact is disconnected to the transmitting contact, the intermediate frequency transmitting port of the intermediate frequency power amplification module receives a signal, and the signal received from the intermediate frequency transmitting port is output from the intermediate frequency receiving port.

4. The power amplifying device of claim 3, wherein The intermediate frequency power amplification module further comprises an intermediate frequency frequency band selection switch, and the intermediate frequency frequency band selection switch is connected to the receiving and transmitting mode switching switch.

5. The power amplifying device of claim 4, wherein The intermediate frequency frequency band selection switch comprises a plurality of intermediate frequency frequency band contacts, each of the intermediate frequency frequency band contacts is connected to the receiving contact and the transmitting contact in the receiving and transmitting mode switching switch.

6. The power amplifying device of claim 5, wherein The receiving contact comprises a plurality of receiving sub-contacts, the transmitting contact comprises a plurality of transmitting sub-contacts, the mode switching contact comprises a plurality of sub-switching contacts, the intermediate frequency transmitting port comprises a plurality of sub-transmitting ports, the number of the receiving sub-contacts, the number of the transmitting sub-contacts, the number of the sub-switching contacts, the number of the sub-transmitting ports and the number of the intermediate frequency frequency band contacts are the same; Each of the intermediate frequency frequency band contacts is connected to a corresponding receiving sub-contact and the transmitting sub-contact, the number of the receiving sub-contacts connected by each of the intermediate frequency frequency band contacts is 1, the number of the transmitting sub-contacts connected by each of the intermediate frequency frequency band contacts is 1, each of the sub-switching contacts is connected to a corresponding sub-transmitting port, and the number of the sub-transmitting ports connected by each of the sub-switching contacts is 1.

7. The power amplifying device of claim 1, wherein The power amplification device further comprises a low frequency power amplification module, and the low frequency power amplification module is independently packaged.

8. The power amplification device of claim 1, wherein, The power amplification device further comprises a high frequency power amplification module, the intermediate frequency power amplification module and the high frequency power amplification module of the power amplification device are integrated into a medium-high frequency power amplification module, and the medium-high frequency power amplification module is independently packaged.

9. A radio frequency front-end device, characterized by The radio frequency front-end device comprises the power amplification device according to any one of claims 1-8.

10. A mobile terminal, characterized by The mobile terminal comprises the power amplification device according to any one of claims 1-8.

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