Radio frequency signal module and mobile terminal
By using switching multiplexing technology of low-frequency amplifiers and switching switches in the RF front-end, the problems of space occupation and cost increase caused by increasing RF devices are solved, and a more efficient RF signal module design is achieved.
Patent Information
- Application Number
- CN202422404236.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-09-29
AI Technical Summary
When existing 4G mobile phone RF circuits support the two low-frequency bands B28A and B29, they need to add RF components, resulting in increased space occupation, increased routing difficulty and high costs.
The RF power amplification unit in the RF front end includes a low-frequency amplifier and a switching switch. By controlling the switching of the switching switch, the low-frequency signal transmission path is reused, reducing the space occupied by the RF front end and the design difficulty.
By reusing low-frequency signal transmission paths, the space occupancy and design difficulty of the RF front end are reduced, thereby reducing costs.
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Figure CN223414868U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of circuit technology, and in particular to a radio frequency signal module and a mobile terminal. Background Art
[0002] The Phase 2 solution for 4G mobile phone RF circuits typically includes an RF transceiver, a RF front-end module (TRX-FEM), and an RF antenna. Due to its simple structure and compact layout, it is currently the mainstream 4G mobile phone RF solution on the market.
[0003] Some products require support for RF signals in both the B28A and B29 low-frequency bands. The more frequency bands required, the more RF components are needed. The B28A band includes both uplink and downlink signals, while the B29 band includes only downlink signals. Assuming the existence of RF components corresponding to the B28A band, the B29 band needs to pass through the corresponding B29 filter; or, based on the RF components corresponding to the B28A band signals, an RF switch can be added to reuse the RF components corresponding to the B28 band by switching the RF switch. However, adding filters or RF switches requires more space on the RF front end, making routing more difficult and increasing the cost of the additional components. Utility Model Content
[0004] In order to solve the above technical problems, the present disclosure provides a radio frequency signal module and a mobile terminal.
[0005] In a first aspect, the present disclosure provides a radio frequency signal module, comprising: a radio frequency front end;
[0006] The RF front end includes a RF power amplification unit; the RF power amplification unit includes a low-frequency amplifier, a first switch, and a second switch;
[0007] The input end of the low-frequency amplifier is electrically connected to the low-frequency input port of the RF power amplification unit; the output end of the low-frequency amplifier is electrically connected to the fixed end of the first switching switch; the first switching switch further includes at least one first switching end and a second switching end; the first switching end is electrically connected to the first low-frequency transmission port of the RF power amplification unit in a one-to-one correspondence;
[0008] The fixed end of the second switch is electrically connected to the second low-frequency transmission port of the RF power amplification unit; the second switch further includes a third switch end and a fourth switch end; the third switch end is electrically connected to the second switch end; the fourth switch end is electrically connected to the low-frequency receiving port of the RF power amplification unit; the low-frequency receiving port is electrically connected to the RF transceiver;
[0009] The low-frequency receiving port is used to receive the low-frequency signal sent by the RF antenna to the second low-frequency transmission port and transmit it to the RF transceiver; the first switching switch is used to select the low-frequency amplifier to be connected to the first low-frequency transmission port or the second switching switch; the second switching switch is used to select the second low-frequency transmission port to be connected to the low-frequency amplifier or the low-frequency receiving port.
[0010] In some embodiments, the first switch includes a first sub-switch and a second sub-switch;
[0011] The fixed end of the first sub-switch is electrically connected to the output end of the low-frequency amplifier; the first sub-switch includes a fifth switching end and a sixth switching end; the fifth switching end is connected to the fixed end of the second sub-switch; the sixth switching end is connected to the third switching end of the second switching switch; the second sub-switch also includes at least one seventh switching end; the seventh switching end is connected to the first low-frequency transmission port in a one-to-one correspondence;
[0012] The first sub-switch and the second sub-switch are used to select the connection between the low-frequency amplifier and the first low-frequency transmission port; the first sub-switch and the second switch are used to select the connection between the low-frequency amplifier and the second low-frequency transmission port, or the connection between the second low-frequency transmission port and the low-frequency receiving port.
[0013] In some embodiments, the first sub-switch and the second sub-switch are both single-pole double-throw switches; and the second sub-switch is a single-pole four-throw switch.
[0014] In some embodiments, a radio frequency antenna and a radio frequency transceiver are also included;
[0015] The radio frequency front end further includes: a duplex unit;
[0016] The first low-frequency transmission port and the second low-frequency transmission port are both electrically connected to the duplex unit; the duplex unit is electrically connected to the RF antenna; and the low-frequency receiving port is electrically connected to the first receiving end of the RF transceiver.
[0017] In some embodiments, the duplexing unit includes a first duplexer;
[0018] The first end of the first duplexer is electrically connected to the second low-frequency transmission port; the second end of the first duplexer is electrically connected to the second receiving end of the RF transceiver; the third end of the first duplexer is electrically connected to the RF antenna; the first duplexer is used to filter low-frequency signals.
[0019] In some embodiments, the RF front end further includes a third switch;
[0020] The third switching switch is electrically connected between the duplex unit and the RF antenna; the third switching switch is used to select a transmission path for the RF antenna to receive low-frequency signals, or to select a transmission path for the RF power amplification unit to send low-frequency signals.
[0021] In some embodiments, the radio frequency power amplification unit includes an intermediate frequency amplifier, an intermediate frequency switch, and at least one intermediate frequency output port;
[0022] The input end of the intermediate frequency amplifier is electrically connected to the intermediate frequency input port of the radio frequency power amplification unit; the intermediate frequency switching switch is electrically connected between the output end of the intermediate frequency amplifier and the intermediate frequency transmission port of the radio frequency power amplification unit;
[0023] The intermediate frequency amplifier is used to amplify the intermediate frequency signal input by the radio frequency transceiver and then output it; the intermediate frequency switching switch is used to select the intermediate frequency amplifier and the target intermediate frequency transmission port to be connected.
[0024] In some embodiments, the radio frequency power amplification unit includes a high-frequency amplifier, a high-frequency switching unit, at least one high-frequency output port, and at least one high-frequency receiving port; the high-frequency switching unit includes at least one high-frequency switching switch;
[0025] The input end of the high-frequency amplifier is electrically connected to the high-frequency input port of the radio frequency power amplification unit; the high-frequency switching unit is electrically connected between the output end of the high-frequency amplifier and the high-frequency transmission port and the high-frequency receiving port of the radio frequency power amplification unit;
[0026] The high-frequency amplifier is used to amplify the high-frequency signal input by the radio frequency transceiver and then output it; the high-frequency switching unit is used to select the high-frequency amplifier to be connected to the target high-frequency transmission port or the target high-frequency receiving port.
[0027] In some embodiments, the radio frequency power amplification unit further includes a control unit;
[0028] The control unit is electrically connected to the first switch and the second switch; the control unit is used to provide control signals to the first switch and the second switch to control the switching of the first switch and the second switch.
[0029] In a second aspect, the present disclosure further provides a mobile terminal comprising any of the radio frequency signal modules provided in the first aspect.
[0030] The technical solution provided by the present disclosure has the following advantages compared with the existing technology:
[0031] The RF signal module provided by the present disclosure includes an RF front end, and the RF power amplification unit in the RF front end includes a low-frequency amplifier, a first switching switch and a second switching switch. By controlling the switching of the first switching switch and the second switching switch, the second low-frequency transmission port can be connected to the low-frequency amplifier or the second low-frequency transmission port can be connected to the low-frequency receiving port. If the second low-frequency transmission port is connected to the low-frequency amplifier, a low-frequency signal is sent to the RF antenna. If the second low-frequency transmission port is connected to the low-frequency receiving port, the low-frequency receiving port can receive the low-frequency signal sent by the RF antenna to the second low-frequency transmission port and transmit it to the RF transceiver. The present disclosure multiplexes the low-frequency signal transmission path by controlling each switching switch and receives the low-frequency signal sent by the RF antenna, which can reduce the occupation of the RF front-end space and reduce the design difficulty and cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0033] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0034] Figure 1 This is a schematic diagram of the structure of a radio frequency module in the prior art;
[0035] Figure 2 Schematic diagram of the structure of another radio frequency module in the prior art;
[0036] Figure 3 A schematic structural diagram of a radio frequency signal module provided in an embodiment of the present disclosure;
[0037] Figure 4 A schematic diagram of a local amplification structure of a radio frequency signal module provided in an embodiment of the present disclosure;
[0038] Figure 5 A schematic diagram of the local amplification structure of another radio frequency signal module provided in an embodiment of the present disclosure. DETAILED DESCRIPTION
[0039] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other in the absence of conflict.
[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.
[0041] In existing mobile phone RF solutions, some products require support for both B28A and B29 low-frequency bands. The more bands required, the more RF components are needed. B28A includes both uplink and downlink signals, while B29 only supports downlink signals.
[0042] Figure 1 This is a structural diagram of a radio frequency signal module in the prior art. Figure 2 This is a structural diagram of another radio frequency signal module in the prior art, refer to Figure 1 and Figure 2 The RF signal module includes RF transceiver (RF Transceiver), RF front-end module (TRX-FEM), RF antenna and RF front-end module (TRX-FEM), but the RF front-end module structures of the two structures are different. Figure 1 The RF front-end module includes a multi-mode, multi-band power amplifier (3G / 4G MMMB PA), a B28A duplexer (B28A DUP), a B29 filter (B20 SAW), and a single-pole, four-throw switch (SP4T). The signal path for the RF transceiver receiving the B29 frequency band is: RF antenna - SP4T switch - B29 filter - RF transceiver. Figure 2 The RF front-end module includes a multi-mode, multi-band power amplifier (3G / 4G MMMB PA), a B28A duplexer (B28A DUP), a single-pole, double-throw switch (SPDT), and a single-pole, four-throw switch (SP4T). The RF transceiver's signal path for receiving the B29 band is: RF antenna - SP4T switch - SPDT switch - RF transceiver. Switching the SPDT switch multiplexes the B28A band signal transmission path, completing reception of the B29 band signal.
[0043] As shown in the above structure, on the basis of the RF front end including the B28 frequency band, if it is also necessary to be able to receive the B29 frequency band, it is necessary to add RF devices to the RF front end, for example, Figure 1 The structure in the above example adds a B29 filter to the RF front end. Figure 2 The structure in the embodiment adds a switching switch to the RF front end, which results in a larger space for the RF front end, increases the difficulty of routing, and increases the cost of adding components.
[0044] In order to solve the above problems, an embodiment of the present disclosure provides a radio frequency signal module. Figure 3A schematic diagram of the structure of a radio frequency signal module provided in an embodiment of the present disclosure is provided. Figure 4 A schematic diagram of a local amplification structure of a radio frequency signal module provided in an embodiment of the present disclosure, with reference to Figure 3 and Figure 4 The RF signal module includes a RF front end; the RF front end includes a RF power amplification unit 10; the RF power amplification unit 10 includes a low-frequency amplifier 110, a first switching switch 120 and a second switching switch 130.
[0045] The input end of the low-frequency amplifier 110 is electrically connected to the low-frequency input port of the RF power amplification unit 10; the output end of the low-frequency amplifier 110 is electrically connected to the fixed end of the first switching switch 120; the first switching switch 120 also includes at least one first switching end and a second switching end; the first switching end is electrically connected to the first low-frequency transmission port of the RF power amplification unit 10 in a one-to-one correspondence.
[0046] The fixed end of the second switching switch 130 is electrically connected to the second low-frequency transmission port of the RF power amplification unit 10; the second switching switch 130 also includes a third switching end and a fourth switching end; the third switching end is electrically connected to the second switching end; the fourth switching end is electrically connected to the low-frequency receiving port of the RF power amplification unit 10; the low-frequency receiving port is electrically connected to the RF transceiver 20.
[0047] The low-frequency receiving port is used to receive the low-frequency signal sent by the RF antenna 30 to the second low-frequency transmission port and transmit it to the RF transceiver 20; the first switching switch 120 is used to select whether the low-frequency amplifier 110 is connected to the first low-frequency transmission port or the second switching switch; the second switching switch 130 is used to select whether the second low-frequency transmission port is connected to the low-frequency amplifier 110 or the low-frequency receiving port.
[0048] Exemplarily, the first switch 120 includes a fixed terminal and at least one first switching terminal and a second switching terminal. For example, the first switching terminal may be electrically connected to the first low-frequency transmission ports LB1-LB4, respectively, and the second switching terminal may be electrically connected to the third switching terminal or the fourth switching terminal of the second switch 130. The fixed terminal of the first switch 120 is electrically connected to the low-frequency amplifier 110, while the second switch 130 is electrically connected to the second low-frequency transmission port LB5. The fourth switching terminal of the second switch 130 is electrically connected to the low-frequency receiving port LBRX.
[0049] The low-frequency amplifier 110 is electrically connected to the RF transceiver 20 and is configured to amplify and output the low-frequency signal input by the RF transceiver. When the low-frequency amplifier 110 receives a low-frequency signal from the low-frequency input port of the RF power amplifier unit 10 and transmits it to the RF antenna 30, it controls the switching between the first switch 120 and the second switch 130 based on the frequency of the low-frequency signal.
[0050] For example, if the low-frequency signal needs to be transmitted to the RF antenna 30 through the first low-frequency transmission port LB1-LB4, the first switching switch 120 needs to be controlled to switch to the first switching end. At this time, the state of the second switching switch 130 will not affect the transmission of the first low-frequency signal. If the low-frequency signal needs to be transmitted to the RF antenna 30 through the second low-frequency transmission port LB5, for example, the low-frequency signal is a signal in the B28A frequency band, the first switching switch 120 needs to be controlled to switch to the second switching end, and the second switching switch 130 needs to be controlled to switch to the third switching end. At this time, the first low-frequency signal is transmitted to the RF antenna 30 through the second low-frequency transmission port LB5 and then emitted outward.
[0051] When the RF antenna receives a low-frequency signal that needs to be transmitted to the RF transceiver 20, for example, the second low-frequency signal is a signal in the B29 frequency band, it is necessary to control the second switching switch 130 to switch to the fourth switching end so that the second low-frequency transmission port LB5 is connected to the low-frequency receiving port LBRX. The low-frequency receiving port LBRX is electrically connected to the receiving end (PRX_B29) of the RF transceiver. As a result, the low-frequency receiving port can receive the low-frequency signal sent by the RF antenna 30 to the second low-frequency transmission port and transmit it to the RF transceiver 20. At this time, the low-frequency signal is received by the RF antenna 30 and transmitted to the RF transceiver 20 via the second switching switch 130. Among them, the state of the first switching switch will not affect the transmission of the second low-frequency signal, so no restriction is made on the first switching switch. In other embodiments, the first switching switch can also be switched to the first switching end to better play an isolation role.
[0052] The frequency range of the low-frequency signal transmitted from the RF antenna 30 to the second low-frequency transmission port is less than or equal to the frequency of the low-frequency signal transmitted from the low-frequency amplifier 110 to the second low-frequency transmission port. During operation, the RF signal only uses one frequency band. Therefore, when the second low-frequency transmission port is not used to transmit the low-frequency signal to the RF antenna, the second switch can connect the second low-frequency transmission port to the low-frequency receiving port, receiving the low-frequency signal transmitted by the RF antenna and transmitting it to the RF transceiver through the low-frequency receiving port. This achieves multiplexing of the transmission path and reduces the number of RF components in the RF front end.
[0053] In an embodiment of the present disclosure, by controlling the switching of the first switching switch and the second switching switch, the second low-frequency transmission port can be connected to the low-frequency amplifier or the second low-frequency transmission port can be connected to the low-frequency receiving port. If the second low-frequency transmission port is connected to the low-frequency amplifier, a low-frequency signal is sent to the RF antenna. If the second low-frequency transmission port is connected to the low-frequency receiving port, the low-frequency receiving port can receive the low-frequency signal sent by the RF antenna to the second low-frequency transmission port and transmit it to the RF transceiver. The present disclosure multiplexes the low-frequency signal transmission path by controlling each switching switch and receives the low-frequency signal sent by the RF antenna, which can reduce the occupation of the RF front-end space and reduce the design difficulty and cost.
[0054] It should be noted that Figure 3 TX means receiving, RX means sending, B28A means Band 28A, and B29 means Band 29. The control chip can be CMOS. Figure 3 The multiple interfaces included in are not used in the embodiments of the present disclosure, so they are not explained and are only briefly illustrated.
[0055] In some embodiments, Figure 5 A schematic diagram of a local amplification structure of another radio frequency signal module provided in an embodiment of the present disclosure, referring to Figure 5 The first switch 120 includes a first sub-switch 121 and a second sub-switch 122 .
[0056] The fixed end of the first sub-switching switch 121 is electrically connected to the output end of the low-frequency amplifier 110; the first sub-switching switch 121 includes a fifth switching end and a sixth switching end; the fifth switching end is connected to the fixed end of the second sub-switching switch 122; the sixth switching end is connected to the third switching end of the second switching switch 122; the second sub-switching switch 122 also includes at least one seventh switching end; the seventh switching end is connected to the first low-frequency transmission port in a one-to-one correspondence.
[0057] The first sub-switch 121 and the second sub-switch 122 are used to select whether to connect the low-frequency amplifier 110 to the first low-frequency transmission port; the first sub-switch 121 and the second sub-switch 130 are used to select whether to connect the low-frequency amplifier 110 to the second low-frequency transmission port, or to connect the second low-frequency transmission port to the low-frequency receiving port.
[0058] Exemplarily, when the low-frequency amplifier receives a low-frequency signal from the low-frequency input port of the RF power amplification unit 10, the first sub-switch 121 is controlled to switch according to the frequency of the low-frequency signal to select the corresponding low-frequency transmission port. For example, if the low-frequency signal needs to be transmitted to the RF antenna 30 through the first low-frequency transmission port LB1-LB4, it is necessary to control the first sub-switch 121 to switch to the fifth switching end. The fifth switching end is connected to the fixed end of the second sub-switch 122, and then by controlling the second sub-switch 122, the corresponding seventh switching end (LB1-LB4) is selected.
[0059] If a low-frequency signal needs to be transmitted to the RF antenna 30 via the second low-frequency transmission port LB5, for example, if the first low-frequency signal is a signal in the B28A frequency band, the first switch 120 needs to be switched to the fourth switching end, and the second switch 130 needs to be switched to the third switching end. At this time, the low-frequency signal is transmitted to the RF antenna 30 via the second low-frequency transmission port LB5 and then emitted outward.
[0060] When the RF antenna 30 receives a low-frequency signal and needs to transmit it to the RF transceiver 20, it is also necessary to select a corresponding transmission path based on the frequency range of the low-frequency signal. For example, if the low-frequency signal is a signal in the B28A frequency band, the RF antenna 30 transmits the low-frequency signal to the RF transceiver 20 without passing through the second switch 130. If the low-frequency signal is a signal in the B29 frequency band, when transmitting it to the RF transceiver 20, it is necessary to control the second switch 130 to switch to the fourth switching end to connect the second low-frequency transmission port LB5 and the low-frequency receiving port LBRX, and transmit it to the RF transceiver 20 through the low-frequency receiving port LBRX.
[0061] In some embodiments, continue to refer to Figure 5 The first sub-switch 121 and the second switch 130 are both single-pole double-throw switches; the second sub-switch 122 is a single-pole four-throw switch.
[0062] For example, when the first sub-switch 121 includes two switching terminals, a single-pole double-throw (SPDT) switch can be selected. Similarly, when the second sub-switch 130 includes two switching terminals, a SPDT switch can also be selected. However, if the second sub-switch 122 includes four switching terminals, a single-pole four-throw (SP4T) switch is required. SPDT switches are low-cost and simple in structure, facilitating the design and use of RF signal modules. Where n > 1, the specific selection can be based on the desired number of switching terminals, and this disclosed embodiment is provided for illustrative purposes only.
[0063] In some embodiments, continue to refer to Figure 3 The RF signal module also includes a RF antenna 30 and a RF transceiver 20 ; the RF front end also includes: a duplex unit 40 .
[0064] The first low-frequency transmission port and the second low-frequency transmission port are both electrically connected to the duplex unit 40 ; the duplex unit 40 is electrically connected to the RF antenna 30 ; and the low-frequency receiving port is electrically connected to the first receiving end of the RF transceiver 20 .
[0065] Exemplarily, when the first low-frequency transmission ports (LB1-LB4) are connected to the low-frequency amplifier 110, they are used to transmit low-frequency signals to the RF antenna 30. When the second low-frequency transmission port LB5 is connected to the low-frequency amplifier 110, it is used to transmit low-frequency signals to the RF antenna 30. Different low-frequency transmission ports transmit low-frequency signals with different frequency ranges. When the second low-frequency transmission port LB5 is connected to the low-frequency receiving port LBRX, it can receive the low-frequency signal transmitted by the RF antenna 30. The low-frequency receiving port LBRX is electrically connected to the first receiving terminal (PRX_B29) of the RF transceiver 20 to transmit the low-frequency signal to the RF transceiver 20.
[0066] It should be noted that the naming of each port in this disclosure is only for example description and can be specifically set according to the frequency range of the actual signal, port function, etc.
[0067] In some embodiments, continue to refer to Figure 3 , the duplex unit 40 includes a first duplexer.
[0068] The first end of the first duplexer is electrically connected to the second low-frequency transmission port; the second end of the first duplexer is electrically connected to the second receiving end of the RF transceiver; and the third end of the first duplexer is electrically connected to the RF antenna. The first duplexer is used to filter low-frequency signals.
[0069] Exemplarily, the duplex unit 40 includes a first duplexer (B28A DUP), the first end of which is electrically connected to the second low-frequency transmission port LB5. The first duplexer can integrate the uplink and downlink paths, isolate the transmitted and received low-frequency signals, and play a filtering role. For example,
[0070] If a low-frequency signal needs to be transmitted to the RF antenna 30 via the second low-frequency transmission port LB5, for example, if the low-frequency signal is a signal in the B28A frequency band, the low-frequency signal is transmitted to the first end of the first duplexer via the second low-frequency transmission port LB5, and then transmitted to the RF antenna 30 for outward transmission. When it is necessary to receive a signal in the B28A frequency band, the signal received by the RF antenna 30 is transmitted to the first duplexer for filtering and directly transmitted to the second receiving end (PRX_B28A) of the RF transceiver 20. When it is necessary to receive a signal in the B29 frequency band, the signal received by the RF antenna 30 is transmitted to the first duplexer for filtering and transmitted to the first receiving end (PRX B29) of the RF transceiver 20 via the low-frequency receiving port LBRX.
[0071] Optionally, the duplex unit further includes multiple second duplexers for electrically connecting to other first low-frequency transmission ports of the RF amplification unit, for example, correspondingly connecting to LB1-LB4, respectively, to isolate and filter signals of different frequency bands. The specific configuration can be determined based on actual needs, and the disclosed embodiments are merely illustrative.
[0072] In some embodiments, continue to refer to Figure 3 , the RF front end also includes a third switch 50.
[0073] The third switching switch 50 is electrically connected between the duplex unit 40 and the RF antenna 30; the third switching switch 50 is used to select the transmission path of the low-frequency signal received by the RF antenna 30, or to select the transmission path of the low-frequency signal sent by the RF power amplification unit 10.
[0074] Exemplarily, the RF signal front end further includes a third switching switch 50, such as a single-pole four-throw switch (SP4T). The fixed end of the third switching switch 50 is electrically connected to the RF antenna 30, and the switching end is electrically connected to the duplex unit 40. For example, each switching end is electrically connected to each duplexer in the duplex unit 40 in a one-to-one correspondence. By controlling the switching of the third switching switch 50, a transmission path for a low-frequency signal to be conducted can be selected, such as selecting a transmission path for a low-frequency signal received by the RF antenna 30 or selecting a transmission path for a low-frequency signal sent by the RF power amplifier unit 10.
[0075] Optionally, the frequency range of the first low-frequency signal provided by the second low-frequency receiving port is 703 MHZ-733 MHZ; the frequency range of the second low-frequency signal is 717 MHZ-728 MHZ.
[0076] For example, the second low-frequency receiving port is used to transmit signals in the B28A frequency band, with a frequency range of 703MHZ-733MHZ; the second low-frequency signal is a signal in the B29 frequency band, with a frequency range of 717MHZ-728MHZ. The B28A frequency band includes uplink and downlink signals, so the path of the B28 frequency band signal includes a duplexer. The B29 frequency band includes downlink signals, and the first low-frequency signal of the second low-frequency receiving port covers the frequency range of the second low-frequency signal. Therefore, when the RF transceiver receives signals in the B29 frequency band, it can reuse the path of the B28 frequency band signal and use its duplexer for filtering without adding additional filters.
[0077] In some embodiments, continue to refer to Figure 3 The RF power amplification unit 10 includes an intermediate frequency amplifier 140, an intermediate frequency switch 150 and at least one intermediate frequency output port.
[0078] The input end of the intermediate frequency amplifier 140 is electrically connected to the intermediate frequency input port of the RF power amplification unit 10; the intermediate frequency switching switch 150 is electrically connected between the output end of the intermediate frequency amplifier 140 and the intermediate frequency transmission port of the RF power amplification unit 10.
[0079] The intermediate frequency amplifier 140 is used to amplify the intermediate frequency signal input by the radio frequency transceiver 20 and then output it; the intermediate frequency switching switch 150 is used to select the intermediate frequency amplifier 140 to be connected to the target intermediate frequency transmission port.
[0080] Exemplarily, the intermediate frequency amplifier 140 is electrically connected to the RF transceiver 20. The intermediate frequency amplifier 140 is configured to amplify the intermediate frequency signal input by the RF transceiver 20 and output the amplified signal to the intermediate frequency switching switch 150. The fixed end of the intermediate frequency switching switch 150 is electrically connected to the output end of the intermediate frequency amplifier 140. The intermediate frequency switching switch 150 also includes multiple switching ends, each of which is connected to an intermediate frequency transmission port (MB1-MB5) of the RF power amplification unit 10 in a one-to-one correspondence. When receiving intermediate frequency signals of different frequencies, the intermediate frequency switching switch 150 can be controlled to selectively connect the intermediate frequency amplifier 140 to the target intermediate frequency transmission port.
[0081] In some embodiments, continue to refer to Figure 3 The RF power amplification unit 10 includes a high-frequency amplifier 160, a high-frequency switching unit 170, at least one high-frequency output port and at least one high-frequency receiving port; the high-frequency switching unit 170 includes at least one high-frequency switching switch.
[0082] The input end of the high-frequency amplifier 160 is electrically connected to the high-frequency input port of the RF power amplification unit 10; the high-frequency switching unit 170 is electrically connected between the output end of the high-frequency amplifier 160 and the high-frequency transmission port and high-frequency receiving port of the RF power amplification unit 10.
[0083] The high frequency amplifier 160 is used to amplify the high frequency signal input by the RF transceiver 20 and then output it; the high frequency switching unit 170 is used to select the high frequency amplifier 160 to be connected to the target high frequency transmission port or the target high frequency receiving port.
[0084] Exemplarily, the high-frequency amplifier 160 is electrically connected to the RF transceiver 20. The high-frequency amplifier 160 is used to amplify the high-frequency signal input by the RF transceiver 20 and output it to the high-frequency switching unit 170. The fixed end of the high-frequency switching unit 170 is electrically connected to the output end of the high-frequency amplifier 160. The high-frequency switching unit 170 also includes multiple switching ends, each of which is electrically connected to the high-frequency transmission port (HB1-HB4) and the high-frequency receiving port (HBRX1-HBRX2) of the RF power amplification unit 10. By controlling the high-frequency switching unit 170, the high-frequency amplifier 160 can be selectively connected to the target high-frequency transmission port or the target high-frequency transmission and receiving port.
[0085] Optionally, the high-frequency switching unit includes multiple high-frequency switching switches to switch under different requirements and conduct the required high-frequency signal path. The embodiment of the present disclosure does not limit the specific structure of the high-frequency switching unit, which can be set according to actual needs.
[0086] In some embodiments, the RF power amplification unit further includes a control unit.
[0087] The control unit is electrically connected to the first switch and the second switch; the control unit is used to provide control signals to the first switch and the second switch to control the switching of the first switch and the second switch.
[0088] Specifically, the control unit can determine the signal transmission path or signal reception path corresponding to each low-frequency signal based on different signals, and then provide control signals to the first switch and the second switch, so that the switching ends of each switch are switched to connect with the corresponding ports to form the required path.
[0089] The present disclosure also provides a mobile terminal including the radio frequency signal module described in any of the above embodiments. Therefore, the mobile terminal provided by the present disclosure also has the above-mentioned beneficial effects, which will not be described in detail here. For example, the mobile terminal can be an electronic device such as a mobile phone or a tablet computer.
[0090] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.
[0091] The foregoing description is intended only to provide specific embodiments of the present disclosure, intended to enable those skilled in the art to understand and implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the embodiments described herein, but rather to be construed in the broadest manner consistent with the principles and novel features disclosed herein.
Claims
1. A radio frequency signal module, characterized in that: include: RF front end; The radio frequency front end includes a radio frequency power amplification unit; The radio frequency power amplification unit includes a low frequency amplifier, a first switch and a second switch; The input end of the low-frequency amplifier is electrically connected to the low-frequency input port of the RF power amplification unit; the output end of the low-frequency amplifier is electrically connected to the fixed end of the first switching switch; the first switching switch further includes at least one first switching end and a second switching end; the first switching end is electrically connected to the first low-frequency transmission port of the RF power amplification unit in a one-to-one correspondence; The fixed end of the second switch is electrically connected to the second low-frequency transmission port of the RF power amplification unit; the second switch further includes a third switch end and a fourth switch end; the third switch end is electrically connected to the second switch end; the fourth switch end is electrically connected to the low-frequency receiving port of the RF power amplification unit; The low frequency receiving port is electrically connected to the radio frequency transceiver; The low-frequency receiving port is used to receive the low-frequency signal sent by the RF antenna to the second low-frequency transmission port and transmit it to the RF transceiver; the first switching switch is used to select the low-frequency amplifier to be connected to the first low-frequency transmission port or the second switching switch; the second switching switch is used to select the second low-frequency transmission port to be connected to the low-frequency amplifier or the low-frequency receiving port.
2. The radio frequency signal module according to claim 1, wherein: The first switch includes a first sub-switch and a second sub-switch; The fixed end of the first sub-switch is electrically connected to the output end of the low-frequency amplifier; the first sub-switch includes a fifth switching end and a sixth switching end; the fifth switching end is connected to the fixed end of the second sub-switch; the sixth switching end is connected to the third switching end of the second switching switch; the second sub-switch also includes at least one seventh switching end; the seventh switching end is connected to the first low-frequency transmission port in a one-to-one correspondence; The first sub-switch and the second sub-switch are used to select the connection between the low-frequency amplifier and the first low-frequency transmission port; the first sub-switch and the second switch are used to select the connection between the low-frequency amplifier and the second low-frequency transmission port, or the connection between the second low-frequency transmission port and the low-frequency receiving port.
3. The radio frequency signal module according to claim 2, wherein: The first sub-switch and the second sub-switch are both single-pole double-throw switches; the second sub-switch is a single-pole four-throw switch.
4. The radio frequency signal module according to claim 1, wherein: Also includes a radio frequency antenna and a radio frequency transceiver; The radio frequency front end further includes: a duplex unit; The first low-frequency transmission port and the second low-frequency transmission port are both electrically connected to the duplex unit; the duplex unit is electrically connected to the RF antenna; and the low-frequency receiving port is electrically connected to the first receiving end of the RF transceiver.
5. The radio frequency signal module according to claim 4, wherein: The duplex unit includes a first duplexer; The first end of the first duplexer is electrically connected to the second low-frequency transmission port; the second end of the first duplexer is electrically connected to the second receiving end of the RF transceiver; the third end of the first duplexer is electrically connected to the RF antenna; the first duplexer is used to filter low-frequency signals.
6. The radio frequency signal module according to claim 4, characterized in that: The RF front end further includes a third switch; The third switching switch is electrically connected between the duplex unit and the RF antenna; the third switching switch is used to select a transmission path for the RF antenna to receive low-frequency signals, or to select a transmission path for the RF power amplification unit to send low-frequency signals.
7. The radio frequency signal module according to claim 1, wherein: The radio frequency power amplification unit includes an intermediate frequency amplifier, an intermediate frequency switch and at least one intermediate frequency output port; The input end of the intermediate frequency amplifier is electrically connected to the intermediate frequency input port of the radio frequency power amplification unit; the intermediate frequency switching switch is electrically connected between the output end of the intermediate frequency amplifier and the intermediate frequency transmission port of the radio frequency power amplification unit; The intermediate frequency amplifier is used to amplify the intermediate frequency signal input by the radio frequency transceiver and then output it; the intermediate frequency switching switch is used to select the intermediate frequency amplifier and the target intermediate frequency transmission port to be connected.
8. The radio frequency signal module according to claim 1, wherein: The radio frequency power amplification unit includes a high-frequency amplifier, a high-frequency switching unit, at least one high-frequency output port and at least one high-frequency receiving port; the high-frequency switching unit includes at least one high-frequency switching switch; The input end of the high-frequency amplifier is electrically connected to the high-frequency input port of the radio frequency power amplification unit; the high-frequency switching unit is electrically connected between the output end of the high-frequency amplifier and the high-frequency transmission port and the high-frequency receiving port of the radio frequency power amplification unit; The high-frequency amplifier is used to amplify the high-frequency signal input by the radio frequency transceiver and then output it; the high-frequency switching unit is used to select the high-frequency amplifier to be connected to the target high-frequency transmission port or the target high-frequency receiving port.
9. The radio frequency signal module according to claim 1, wherein: The radio frequency power amplification unit further includes a control unit; The control unit is electrically connected to the first switch and the second switch; the control unit is used to provide control signals to the first switch and the second switch to control the switching of the first switch and the second switch.
10. A mobile terminal, characterized in that: Comprising the radio frequency signal module according to any one of claims 1 to 9.