Radio frequency circuit, mainboard and terminal equipment
By reusing the low-noise amplifier-filter module to implement the NR N41 SRS function, the high cost problem caused by adding extra switches in the RF circuit is solved, achieving cost reduction, improved integration and enhanced flexibility.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 南昌勤胜电子科技有限公司
- Filing Date
- 2025-05-16
- Publication Date
- 2026-04-28
AI Technical Summary
In the prior art, in order to realize the NR N41 SRS function, an additional switch needs to be added to the RF circuit, which results in high hardware design cost and increases circuit complexity and signal insertion loss.
The NR N41 SRS function is implemented by reusing the low-noise amplifier-filter module, eliminating the need for an additional switch. Function switching is achieved through software configuration, reducing hardware procurement and assembly costs, and optimizing the layout to reduce space occupation and simplify capacitors and signal routing.
It reduces hardware design costs, simplifies manufacturing processes, improves motherboard integration and design flexibility, shortens product iteration cycles, and enhances signal processing consistency and reliability.
Smart Images
Figure CN224178161U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of mobile communication technology, and in particular to a radio frequency circuit, a motherboard, and a terminal device. Background Technology
[0002] With the rapid development of mobile communication technology, wireless mobile terminals (such as smartphones and tablets) need to support more frequency bands and functions to meet market demands. Among them, under New Radio (NR), the N41 band is one of the important frequency bands, such as 5G Sub-6GHz. The Sounding Reference Signal (SRS) for the N41 band is crucial for achieving uplink channel measurement and beamforming.
[0003] In related technologies, in order to realize the NNR41 SRS function, it is usually necessary to add an extra switch in the radio frequency circuit to distribute the transmitted signal to different antenna paths.
[0004] However, it suffers from high hardware design costs. Utility Model Content
[0005] The radio frequency circuit, motherboard, and terminal device provided in this application are intended to improve the problem of high hardware design costs of radio frequency circuits in related technologies.
[0006] In a first aspect, this application provides a radio frequency circuit, comprising: a signal processing module, a switching module, a low-noise amplifier-filter module, and an antenna module, wherein:
[0007] The output of the signal processing module is connected to the input of the switching module; the three outputs of the switching module are respectively connected to the detection reference signal input of the low noise amplifier front-end module (L-FEM) and the first and second antennas in the antenna module; the two outputs of the low noise amplifier front-end module are respectively connected to the third and fourth antennas in the antenna module.
[0008] When the switching module connects the signal channel between the signal processing module and the first antenna, a main frequency transmission signal transmission channel is formed; when the switching module connects the signal channels between the signal processing module and the second antenna and the low noise amplifier-filter module respectively, a detection reference signal transmission channel is formed.
[0009] In one possible implementation, the switch module includes a triple-pole triple-throw switch (3P3T). The input terminal of the triple-pole triple-throw switch serves as the input terminal of the switch module, and the three output terminals of the triple-pole triple-throw switch serve as the three output terminals of the switch module.
[0010] In one possible implementation, the switch module includes a double-pole quadruple-throw (2P4T) switch, with the input terminal of the 2P4T switch serving as the input terminal of the switch module, and the three output terminals of the 2P4T switch serving as the three output terminals of the switch module.
[0011] In one possible implementation, the low-noise amplifier-filter module is a low-noise amplifier-filter module that supports the NR N77 band.
[0012] In one possible implementation, the main frequency transmission signal used for transmission in the main frequency transmission signal channel and the detection reference signal used for transmission in the detection reference signal transmission channel are both signals corresponding to the N41 frequency band.
[0013] In one possible implementation, the signal processing module includes a signal generation module and a power amplification module, wherein: the output terminal of the signal generation module is connected to the input terminal of the power amplification module, and the output terminal of the power amplification module serves as the output terminal of the signal processing module; the signal generation module is used to generate a main frequency transmission signal or a detection reference signal; the power amplification module is used to amplify the main frequency transmission signal or the detection reference signal to the target power, thereby obtaining and outputting the corresponding amplified signal.
[0014] In one possible implementation, the signal processing module further includes a filtering module connected between the power amplification module and the switching module.
[0015] In one possible implementation, the power amplifier module is a 5G power amplifier.
[0016] Secondly, this application provides a motherboard including the radio frequency circuitry as described in the first aspect.
[0017] Thirdly, this application provides a terminal device, which includes the radio frequency circuit as described in the first aspect, or the terminal device includes the motherboard as described in the second aspect.
[0018] The radio frequency circuit, motherboard, and terminal device provided in this application include: a signal processing module, a switching module, a low-noise amplifier-filter module, and an antenna module; wherein, the output terminal of the signal processing module is connected to the input terminal of the switching module; the three output terminals of the switching module are respectively connected to the detection reference signal input terminal of the low-noise amplifier-filter module, and the first and second antennas in the antenna module; the two output terminals of the low-noise amplifier-filter module are respectively connected to the third and fourth antennas in the antenna module; when the switching module conducts the signal channel between the signal processing module and the first antenna, a main frequency transmission signal transmission channel is formed; when the switching module conducts the signal channels between the signal processing module and the second antenna and the low-noise amplifier-filter module respectively, a detection reference signal transmission channel is formed. This application implements the NR N41 SRS function by reusing a low-noise amplifier-filter module, eliminating the need for an additional switch required in traditional solutions and directly reducing hardware procurement and assembly costs. In terms of layout optimization, the saved switch not only reduces its own footprint but also simplifies the power supply decoupling capacitors and control signal routing, significantly improving motherboard integration. Furthermore, when there is uncertainty regarding the NR N41 SRS functional requirements, function switching can be achieved solely through software configuration without any hardware modifications. This not only shortens the product iteration cycle but also enhances design flexibility. In summary, this optimized hardware architecture design has positive implications for reducing hardware design costs, simplifying manufacturing processes, and improving system integration. Attached Figure Description
[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0020] Figure 1 A simplified schematic diagram of the radio frequency circuit corresponding to the addition of an extra switch in the radio frequency circuit in the related technology;
[0021] Figure 2 This is a simplified schematic diagram of the low-noise amplifier-filter module in related technologies;
[0022] Figure 3 Schematic diagram of the radio frequency circuit provided for an exemplary embodiment of this application Figure 1 ;
[0023] Figure 4 Schematic diagram of the radio frequency circuit provided for an exemplary embodiment of this application Figure 2 ;
[0024] Figure 5 Schematic diagram of the radio frequency circuit provided for an exemplary embodiment of this application Figure 3 ;
[0025] Figure 6 A schematic diagram of a 5G power amplifier provided as an exemplary embodiment of this application;
[0026] Figure 7 Schematic diagram of the radio frequency circuit provided for an exemplary embodiment of this application Figure 4 .
[0027] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation
[0028] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the connection within two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0030] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0031] In the above description, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0032] In order to enable those skilled in the art to better understand the technical solutions provided in the embodiments of this application, the solutions of related technologies will be introduced before introducing the technical solutions provided in the embodiments of this application.
[0033] Figure 1 This is a simplified schematic diagram of the radio frequency (RF) circuit corresponding to the addition of an extra switch in the RF circuit in related technologies. For example... Figure 1 As shown, the RF circuit includes a signal processing module, a switching module, a switch, and an antenna. The switch, for example, is a single-pole four-throw (SP4T) switch. When this switch, according to the control system's instructions, opens the signal channel between the switching module and the antenna, it forms probe reference signal transmission channels, such as N41 SRS2, N41 SRS3, and N41 SRS4, allowing the probe reference signal to be transmitted to the corresponding antenna. Correspondingly, since the switch is a separate device, it requires additional chip area for integration, increasing hardware costs. Simultaneously, the introduction of the switch necessitates the design of additional control circuitry to manage its state, further increasing circuit complexity. Furthermore, the presence of the switch increases signal insertion loss and reduces signal quality, potentially requiring additional compensation circuitry, further increasing hardware design costs.
[0034] During their research, the inventors discovered that in traditional RF front-end designs, a low-noise amplifier-filter module is typically configured for the NR N77 band to implement its functions. This low-noise amplifier-filter module integrates various RF components, such as a low-noise amplifier (LNA), a power amplifier (PA), a filter, and switches, to perform functions such as RF signal reception, transmission, filtering, and amplification. For example, Figure 2 This is a simplified schematic diagram of a low-noise amplifier-filter module in related technologies. (Example:) Figure 2As shown, the low-noise amplifier-filter module is equipped with probe reference signal input terminals such as SRS1 and SRS2, and also has output terminals such as 5G_ANT1 and 5G_ANT2 that are connected to the antenna. Therefore, to solve the above problems, this application provides a radio frequency circuit solution. In the radio frequency circuit, a low-noise amplifier-filter module is shared with the NR N77 band, that is, the low-noise amplifier-filter module of the NRN77 band is reused. The NR N41 SRS function, which requires a separate switch in related technologies, is achieved by using the SRS switch integrated inside the low-noise amplifier-filter module. Since the additional switch is eliminated, the hardware procurement and assembly costs are directly reduced. In terms of layout optimization, the saved switch not only reduces its own footprint, but also simplifies the matching power supply decoupling capacitors and control signal traces, significantly improving the motherboard integration. In addition, when there is uncertainty in the NR N41 SRS function requirements, the function can be switched only through software configuration without any hardware modification. This not only shortens the product iteration cycle, but also improves design flexibility. This has positive significance for reducing hardware design costs, simplifying manufacturing processes, and improving system integration.
[0035] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.
[0036] Figure 3 Schematic diagram of the radio frequency circuit provided for an exemplary embodiment of this application Figure 1 ,like Figure 3 As shown, the radio frequency circuit provided in this application embodiment includes: a signal processing module 31, a switching module 32, a low-noise amplifier-filter module 33, and an antenna module 34, wherein:
[0037] The output terminal of the signal processing module 31 is connected to the input terminal of the switch module 32; the three output terminals of the switch module 32 are respectively connected to the detection reference signal input terminal of the low noise amplifier-filter module 33, and the first antenna 341 and the second antenna in the antenna module 34 342; the two output terminals of the low noise amplifier-filter module 33 are respectively connected to the third antenna 343 and the fourth antenna 344 in the antenna module 34.
[0038] When the switch module 32 conducts the signal channel between the signal processing module 31 and the first antenna 341, a main frequency transmission signal transmission channel is formed; when the switch module 32 conducts the signal channels between the signal processing module 31 and the second antenna 342 and the low noise amplifier-filter module 33 respectively, a detection reference signal transmission channel is formed.
[0039] The N41 band is a specific frequency band in 5G communication, with a frequency range of approximately 2496MHz - 2690MHz. The N41 band has its own characteristics in terms of coverage and penetration. Generally speaking, lower frequency bands (such as N41) have relatively longer signal propagation distances and stronger penetration capabilities, making them suitable for wide-coverage scenarios, such as urban suburbs and rural areas, providing users with basic 5G signal coverage. The sounding reference signal (SRS) is a special signal sent to the base station by terminal devices such as mobile phones or IoT devices, acting like a "detector" to help the base station detect the status information of the wireless channel. The NR N41 SRS function refers to the process in 5G communication where terminal devices send SRS signals on the N41 band, the base station receives these signals and analyzes the wireless channel status, and then performs corresponding processing based on the analysis results. Through this function, the base station can understand the changes in the wireless channel under the N41 band in real time, thereby optimizing communication resource allocation and improving communication quality and system performance.
[0040] For example, signal processing module 31 is used to process the signal transmitted by N41 to obtain the processed signal; switch module 32 is used to select and activate the corresponding signal transmission channel according to the instructions of the control system. For example, when switch module 32 activates the signal channel between signal processing module 31 and first antenna 341, a main frequency transmission signal transmission channel, such as N41 TRX channel, is formed, thereby transmitting the main frequency transmission signal to the first antenna 341; when switch module 32 activates the signal channels between signal processing module 31 and second antenna 342 and low noise amplifier-filter module 33 respectively, a detection reference signal transmission channel, such as N41 SRS2 channel, N41 SRS3 channel and N41 SRS4 channel, is formed, thereby transmitting the detection reference signal to second antenna 342, third antenna 343 or fourth antenna 344.
[0041] For example, in some embodiments, the low-noise amplifier-filter module 33 is a low-noise amplifier-filter module that supports the NR N77 band. Accordingly, the low-noise amplifier-filter module 33 can be configured via software to switch between NR N41SRS function and related functions of the NR N77 band. For example, in response to control command 1, the low-noise amplifier-filter module 33 is used to implement the NR N41 SRS function; in response to control command 2, the low-noise amplifier-filter module 33 is used to implement related functions of the NRN77 band.
[0042] In this embodiment, the NR N41 SRS function is implemented by reusing the low-noise amplifier-filter module, eliminating the need for an additional switch required in traditional solutions and directly reducing hardware procurement and assembly costs. In terms of layout optimization, the saved switch not only reduces its own footprint but also simplifies the power supply decoupling capacitors and control signal routing, significantly improving motherboard integration. Furthermore, when there is uncertainty regarding the NR N41 SRS functional requirements, function switching can be achieved solely through software configuration without any hardware modifications. This not only shortens the product iteration cycle but also enhances design flexibility. In summary, this optimized hardware architecture design has positive implications for reducing hardware design costs, simplifying manufacturing processes, and improving system integration.
[0043] In some embodiments, the switching module includes a three-pole three-throw switch, with the input terminal of the three-pole three-throw switch serving as the input terminal of the switching module, and the three output terminals of the three-pole three-throw switch serving as the three output terminals of the switching module.
[0044] For example, the input terminal of the three-pole three-throw switch is used as the input terminal of the switch module, that is, the output terminal of the signal processing module is connected to the input terminal of the three-pole three-throw switch; the three output terminals of the three-pole three-throw switch are respectively connected to the detection reference signal input terminal of the low noise amplifier-filter module, and the first and second antennas in the antenna module; the two output terminals of the low noise amplifier-filter module are respectively connected to the third and fourth antennas in the antenna module.
[0045] In some embodiments, the switching module includes a two-pole four-throw switch, with the input terminal of the two-pole four-throw switch serving as the input terminal of the switching module, and the three output terminals of the two-pole four-throw switch serving as the three output terminals of the switching module.
[0046] For example, the input terminal of the two-pole four-throw switch is used as the input terminal of the switch module, that is, the output terminal of the signal processing module is connected to the input terminal of the two-pole four-throw switch; the three output terminals of the two-pole four-throw switch are respectively connected to the detection reference signal input terminal of the low noise amplifier-filter module, and the first and second antennas in the antenna module; the two output terminals of the low noise amplifier-filter module are respectively connected to the third and fourth antennas in the antenna module.
[0047] Optionally, the switching module also includes a programmable radio frequency switch array with equivalent functionality. Correspondingly, the input terminal of the programmable radio frequency switch array serves as the input terminal of the switching module, i.e., the output terminal of the signal processing module is connected to the input terminal of the programmable radio frequency switch array; the three output terminals of the programmable radio frequency switch array are respectively connected to the detection reference signal input terminal of the low noise amplifier-filter module, and the first and second antennas in the antenna module; the two output terminals of the low noise amplifier-filter module are respectively connected to the third and fourth antennas in the antenna module.
[0048] This application embodiment, by employing a three-pole three-throw switch, a two-pole four-throw switch, or a programmable RF switch array with equivalent functionality as the switching module, can provide flexible signal management and path selection functions in different application scenarios, meeting diverse needs in various application scenarios. Furthermore, by using a three-pole three-throw switch, a two-pole four-throw switch, or a programmable RF switch array with equivalent functionality as the switching module, the motherboard area occupied is smaller, allowing for more space for component placement, which is crucial given the increasingly severe challenges in component placement. Additionally, the hardware design cost is lower. In summary, this design has positive implications for providing operational flexibility, reducing the space occupied by components on the motherboard, reducing the motherboard area, and saving hardware design costs.
[0049] In some embodiments, the main frequency transmission signal used to transmit the main frequency transmission signal in the main frequency transmission channel and the detection reference signal used to transmit the detection reference signal in the detection reference signal transmission channel are both signals corresponding to the N41 frequency band.
[0050] For example, the main frequency transmit signal channel is configured to transmit Orthogonal Frequency Division Multiplexing (OFDM) signals in the N41 band (2496MHz-2690MHz), with a center frequency of, for example, 2540MHz and a bandwidth of, for example, 100MHz, for transmitting downlink data and control information. The sounding reference signal transmission channel reuses reserved subcarriers within the N41 band, employing a frequency hopping mode with a frequency interval of, for example, 5MHz, to periodically transmit SRS signals for uplink channel quality measurement. It should be noted that the spectra of both signals are concentrated within the N41 band.
[0051] In some embodiments, the signal processing module includes a signal generation module and a power amplification module, wherein: the output terminal of the signal generation module is connected to the input terminal of the power amplification module, and the output terminal of the power amplification module serves as the output terminal of the signal processing module; the signal generation module is used to generate a main frequency transmission signal or a detection reference signal; the power amplification module is used to amplify the main frequency transmission signal or the detection reference signal to the target power, thereby obtaining and outputting the corresponding amplified signal.
[0052] For example, Figure 4 Schematic diagram of the radio frequency circuit provided for an exemplary embodiment of this application Figure 2 ,like Figure 4 As shown, the signal processing module 31 includes a signal generation module 311 and a power amplification module 312; wherein, the output terminal of the signal generation module 311 is connected to the input terminal of the power amplification module 312, and the output terminal of the power amplification module 312 serves as the output terminal of the signal processing module 31; wherein:
[0053] Signal generation module 31 is used to generate the main frequency transmission signal or the detection reference signal;
[0054] The power amplifier module 312 is used to amplify the main frequency transmission signal or the detection reference signal to the target power, and obtain and output the corresponding amplified signal.
[0055] For example, the signal generation module 31 can be configured to generate an OFDM main frequency transmission signal or a frequency hopping SRS reference signal in the N41 band; correspondingly, the power amplification module 312 boosts the power of these signals to a level that meets the transmission requirements of the N41 band before outputting them.
[0056] In this embodiment, the integrated signal generation and power amplification functions enable efficient processing of the main frequency transmission signal and the detection reference signal. This allows the signal generation module to directly generate the required signal, while the power amplification module can precisely adjust different signals to the target power. This ensures both the coverage performance of the main frequency signal and meets the measurement accuracy requirements of the reference signal. This integrated design not only simplifies the system architecture and reduces hardware complexity, but also improves the consistency and reliability of signal processing. Furthermore, it supports dynamic power adjustment, providing a flexible and efficient solution for signal transmission in 5G communication systems.
[0057] In some embodiments, the signal processing module further includes a filtering module connected between the power amplification module and the switching module.
[0058] For example, Figure 5 Schematic diagram of the radio frequency circuit provided for an exemplary embodiment of this application Figure 3 ,like Figure 5As shown, the signal processing module 31 also includes a filtering module 313; the output terminal of the power amplification module 312 is connected to the input terminal of the filtering module 313, and the output terminal of the filtering module 313 serves as the output terminal of the signal processing module 31. The filtering module 313 filters the corresponding amplified signal output by the power amplification module 312 to suppress spurious components outside the N41 frequency band (2496MHz-2690MHz). While ensuring signal integrity within the passband, it can achieve technical specifications such as out-of-band spurious suppression ≥40dBc and second harmonic attenuation ≥35dBc, thereby significantly improving the signal quality of the communication system and reducing interference from adjacent channels.
[0059] In this embodiment of the application, by setting a filtering module in the signal processing module, the signal after power amplification is bandpass filtered, which effectively suppresses out-of-band spurious and harmonic interference, thereby improving the spectral purity of the output signal to meet the spectrum transmission specifications of relevant communication standards.
[0060] In some embodiments, the power amplification module is a 5G power amplifier.
[0061] For example, since the N41 band is one of the important frequency bands for 5G Sub-6GHz, the power amplifier module is set up as a 5G power amplifier. By designing and optimizing the 5G power amplifier for the 5G band, the RF signals in the N41 band can be effectively amplified. Compared with traditional power amplifiers, the 5G power amplifier has better performance in terms of frequency band coverage, gain, and linearity, meeting the stringent signal amplification requirements of 5G communication.
[0062] For example, Figure 6 A schematic diagram of a 5G power amplifier provided as an exemplary embodiment of this application. Figure 6As shown in the diagram, "MIPI" represents the Mobile Industry Processor Interface (MIPI), a high-speed serial interface standard. In 5G power amplifiers, the MIPI interface is mainly used to receive configuration and control signals from the baseband chip or other control units. These signals cover important parameters such as power settings, gain adjustments, and operating mode selection, providing precise instructions for the operation of the power amplifier. The CMOS controller, as the core control unit of the power amplifier module, receives instructions from the MIPI interface, parses and processes these instructions, and generates corresponding control signals to adjust the operating state of the power amplifier. For example, it can precisely control key parameters such as the gain, output power, and operating frequency band of the power amplifier, ensuring that the power amplifier can operate stably as expected. The diagram shows multiple input signal interfaces, such as "RFIN_H", "RFIN_M", "RFIN_L1", and "RFIN_L2". These interfaces are used to receive radio frequency input signals of different levels or modes.
[0063] Correspondingly, in terms of workflow, the MIPI interface receives configuration and control signals from an external control unit and transmits them to the CMOS controller. The CMOS controller analyzes and processes these signals to generate corresponding control signals, thereby adjusting the operating state of the power amplifier. Simultaneously, the processed RF input signal enters the amplifier circuit. Under the action of the control signals, the transistors in the amplifier circuit amplify the input signal. This amplification process includes current amplification and voltage amplification, ultimately outputting an RF signal with sufficient power. Accordingly, the amplified RF signal is output through output ports (such as HB1-HB5, LB1-LB5, etc.). These output signals can be connected to antennas or other RF devices and are widely used in wireless communication or other RF application scenarios, providing strong support for the stable operation of 5G communication systems.
[0064] For example, Figure 7 Schematic diagram of the radio frequency circuit provided for an exemplary embodiment of this application Figure 4 .like Figure 7As shown, the signal processing module 31 includes a signal generation module 311, a power amplification module 312, and a filtering module 313, wherein the power amplification module 312 is a 5G power amplifier; the switching module 32 is a three-pole three-throw switch; correspondingly, when the three-pole three-throw switch conducts the signal channel between the filtering module 313 and the first antenna 341 in the signal processing module 31, a main frequency transmission signal transmission channel, such as the N41 TRX channel, is formed, thereby transmitting the main frequency transmission signal to the first antenna 341; when the three-pole three-throw switch conducts the signal channels between the filtering module 313 and the second antenna 342 and the low noise amplifier-filter module 33 in the signal processing module 31, respectively, a detection reference signal transmission channel, such as the N41 SRS2 channel, the N41 SRS3 channel, and the N41 SRS4 channel, is formed, thereby transmitting the detection reference signal to the second antenna 342, the third antenna 343, or the fourth antenna 344.
[0065] This application also provides a motherboard including the radio frequency circuit described in the above embodiments.
[0066] For example, in addition to radio frequency circuits, the motherboard also includes a central processing unit, memory units, storage, power management unit, connection interfaces, etc. These components together constitute the core functions of the motherboard, supporting the full operation of the device and the user experience.
[0067] Applying the radio frequency circuit provided in the above embodiments to the motherboard of this application embodiment effectively reduces the space occupied by the components on the motherboard and reduces the area occupied by the motherboard.
[0068] This application also provides a terminal device, which includes the radio frequency circuit described in the above embodiments, or the terminal device includes the motherboard described in the above embodiments.
[0069] For example, terminal devices can be mobile phones, tablets, smart TVs, wearable devices, computers with wireless transceiver capabilities, wireless terminals in autonomous driving, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and so on.
[0070] Applying the radio frequency circuit or motherboard provided in the above embodiments to the terminal device of this application embodiment can reduce the size and power consumption of the terminal device.
[0071] In summary, this application has at least the following advantages:
[0072] First, by reusing the low-noise amplifier-filter module to implement the NR N41 SRS function, the need for additional switches in traditional solutions is eliminated, directly reducing hardware procurement and assembly costs. In terms of layout optimization, the saved switches not only reduce their own footprint but also simplify the power supply decoupling capacitors and control signal routing, significantly improving motherboard integration. Furthermore, when there is uncertainty regarding the NR N41 SRS functional requirements, function switching can be achieved solely through software configuration without any hardware modifications. This not only shortens the product iteration cycle but also enhances design flexibility. In summary, this optimized hardware architecture design has positive implications for reducing hardware design costs, simplifying manufacturing processes, and improving system integration.
[0073] Second, by employing triple-pole triple-throw switches, double-pole quad-throw switches, or programmable RF switch arrays with equivalent functions as switch modules, flexible signal management and path selection capabilities can be provided in different application scenarios, meeting diverse needs. Furthermore, using triple-pole triple-throw switches, double-pole quad-throw switches, or programmable RF switch arrays with equivalent functions as switch modules results in a smaller motherboard footprint, increasing component placement space—a crucial factor given the increasingly challenging component space constraints—and also lowers hardware design costs. In summary, this design is significant for providing operational flexibility, reducing component space on the motherboard, decreasing motherboard footprint, and saving hardware design costs.
[0074] Third, through integrated signal generation and power amplification functions, efficient processing of the main frequency transmission signal and the detection reference signal is achieved. This allows the signal generation module to directly generate the required signal, while the power amplification module can precisely adjust different signals to the target power. This ensures both the coverage performance of the main frequency signal and meets the measurement accuracy requirements of the reference signal. This integrated design not only simplifies the system architecture and reduces hardware complexity, but also improves the consistency and reliability of signal processing. At the same time, it supports dynamic power adjustment, providing a flexible and efficient solution for signal transmission in 5G communication systems.
[0075] Fourth, by setting a filtering module in the signal processing module, the signal after power amplification is bandpass filtered, which effectively suppresses out-of-band spurious and harmonic interference, thereby improving the spectral purity of the output signal to meet the spectrum transmission specifications of relevant communication standards.
[0076] Finally, it should be noted that other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and alterations may be made without departing from its scope. The scope of this application is limited only by the appended claims.
Claims
1. A radio frequency circuit, characterized in that, include: The signal processing module, switching module, low-noise amplifier-filter module, and antenna module include: The output terminal of the signal processing module is connected to the input terminal of the switch module; the three output terminals of the switch module are respectively connected to the detection reference signal input terminal of the low noise amplifier-filter module, and the first and second antennas in the antenna module; the two output terminals of the low noise amplifier-filter module are respectively connected to the third and fourth antennas in the antenna module. When the switching module connects the signal channel between the signal processing module and the first antenna, a main frequency transmission signal transmission channel is formed; when the switching module connects the signal channels between the signal processing module and the second antenna and the low noise amplifier-filter module respectively, a detection reference signal transmission channel is formed.
2. The radio frequency circuit according to claim 1, characterized in that, The switch module includes a three-pole three-throw switch, the input terminal of which serves as the input terminal of the switch module, and the three output terminals of which serve as the three output terminals of the switch module.
3. The radio frequency circuit according to claim 1, characterized in that, The switch module includes a two-pole four-throw switch, the input terminal of which serves as the input terminal of the switch module, and the three output terminals of which serve as the three output terminals of the switch module.
4. The radio frequency circuit according to any one of claims 1 to 3, characterized in that, The low-noise amplifier-filter module is a low-noise amplifier-filter module that supports the NR N77 frequency band.
5. The radio frequency circuit according to any one of claims 1 to 3, characterized in that, The main frequency transmission signal used to transmit the main frequency transmission signal in the main frequency transmission channel and the detection reference signal used to transmit the detection reference signal in the detection reference signal transmission channel are both signals corresponding to the N41 frequency band.
6. The radio frequency circuit according to claim 5, characterized in that, The signal processing module includes a signal generation module and a power amplification module, wherein: The output terminal of the signal generation module is connected to the input terminal of the power amplification module, and the output terminal of the power amplification module serves as the output terminal of the signal processing module. The signal generation module is used to generate the main frequency transmission signal or the detection reference signal; The power amplification module is used to amplify the main frequency transmission signal or the detection reference signal to the target power, and obtain and output the corresponding amplified signal.
7. The radio frequency circuit according to claim 6, characterized in that, The signal processing module further includes a filtering module, which is connected between the power amplification module and the switching module.
8. The radio frequency circuit according to claim 6, characterized in that, The power amplifier module is a 5G power amplifier.
9. A motherboard, characterized in that, Includes the radio frequency circuit as described in any one of claims 1 to 8.
10. A terminal device, characterized in that, The terminal device includes the radio frequency circuit as described in any one of claims 1 to 8, or the terminal device includes the motherboard as described in claim 9.