Radio frequency front-end module, wireless communication module and wireless communication equipment
The combined structure of a duplexer and multiplexer solves the problems of high frequency band insertion loss and poor current consumption in carrier aggregation and dual-connection technologies, achieves more efficient frequency band sharing and improved sensitivity, and simplifies circuit design.
Patent Information
- Application Number
- CN202423043763.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Existing carrier aggregation and dual connectivity technologies use a common antenna solution, which results in high insertion loss in the frequency band, poor current consumption and sensitivity, and requires multiple filtering components, increasing circuit complexity and space occupancy.
A combined structure of a duplexer and a multiplexer is adopted. The low-frequency and medium-frequency signals are combined through the duplexer, and the high-frequency and ultra-high-frequency signals are combined through the multiplexer, eliminating the need for filtering devices. The coupling unit and the RF switch are used to achieve flexible switching of different frequency bands and share antennas.
It reduces circuit complexity, reduces circuit space occupation, improves frequency band performance and efficiency, enhances sensitivity and current consumption, and supports applications in more frequency bands.
Smart Images
Figure CN223463009U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of communication, in particular to a radio frequency front-end module, a wireless communication module and a wireless communication device. BACKGROUND
[0002] Carrier aggregation is a technology for improving user data transmission rate and reducing delay by integrating wireless channel resources within or between frequency bands; dual connectivity refers to a technology in which a device can be connected to a 4G base station and a 5G base station at the same time.
[0003] The existing carrier aggregation and dual connectivity technology adopts a common antenna scheme, and considering the influence of isolation, many filter devices need to be arranged on the path, the insertion loss of the frequency band is often large, and the performance such as flow consumption and sensitivity is not good. CONTENT OF THE UTILITY MODEL
[0004] In view of the deficiencies in the prior art, the present application provides a radio frequency front-end module, a wireless communication module and a wireless communication device to solve the problems in the prior art.
[0005] The technical scheme adopted by the embodiments of the present application is as follows:
[0006] In a first aspect, the embodiments of the present application provide a radio frequency front-end module, comprising: a duplexer, a multiplexer and a radio frequency antenna; wherein the first radio frequency end and the second radio frequency end of the duplexer are used to connect the low frequency port and the intermediate frequency port of the radio frequency transceiver respectively, the third radio frequency end of the duplexer is connected to the first radio frequency end of the multiplexer, the second radio frequency end and the third radio frequency end of the multiplexer are used to connect the high frequency port and the ultra-high frequency port of the radio frequency transceiver respectively, and the fourth radio frequency end of the multiplexer is connected to the radio frequency antenna.
[0007] Optionally, the radio frequency front-end module further comprises: a first coupling unit, a second coupling unit and a third coupling unit.
[0008] The first coupling unit is connected between the third radio frequency end of the duplexer and the first radio frequency end of the multiplexer, the second coupling unit is connected between the high frequency port and the second radio frequency end of the multiplexer, and the third coupling unit is connected between the ultra-high frequency port and the third radio frequency end of the multiplexer.
[0009] Optionally, the radio frequency front-end module further comprises: a first radio frequency switch, which is connected between the first radio frequency end of the duplexer and the low frequency port.
[0010] Optionally, the radio frequency front-end module further comprises: a second radio frequency switch, which is connected between the second radio frequency end of the duplexer and the intermediate frequency port.
[0011] Optionally, the radio frequency front-end module further comprises a third radio frequency switch connected between the second coupling unit and the high frequency port.
[0012] Optionally, the radio frequency front-end module further comprises a fourth radio frequency switch connected between the third coupling unit and the ultra-high frequency port.
[0013] Optionally, the first coupling unit, the second coupling unit and the third coupling unit each comprises a first inductor and a first capacitor.
[0014] Optionally, the radio frequency front-end module further comprises a second inductor, a third inductor and a second capacitor.
[0015] The fourth radio frequency end of the multiplexer is connected to the radio frequency antenna through the second inductor, the third inductor and the second capacitor in sequence.
[0016] In a second aspect, the embodiments of the present application provide a wireless communication module, comprising: a radio frequency transceiver, a power amplifier, a low noise amplifier, a filter and the radio frequency front-end module according to any one of the above embodiments.
[0017] The transmitting end of the radio frequency transceiver is connected to the radio frequency front-end module through the power amplifier and the filter in sequence.
[0018] The radio frequency front-end module is further connected to the receiving end of the radio frequency transceiver through the filter and the low noise amplifier in sequence.
[0019] In a third aspect, the embodiments of the present application provide a wireless communication device, comprising at least the wireless communication module according to the above embodiments.
[0020] The radio frequency front-end module provided by the present application comprises a duplexer, a multiplexer and a radio frequency antenna, wherein the first radio frequency end and the second radio frequency end of the duplexer are respectively used to connect the low frequency port and the intermediate frequency port of a radio frequency transceiver, the third radio frequency end of the duplexer is connected to the first radio frequency end of the multiplexer, the second radio frequency end and the third radio frequency end of the multiplexer are respectively used to connect the high frequency port and the ultra-high frequency port of the radio frequency transceiver, and the fourth radio frequency end of the multiplexer is connected to the radio frequency antenna.
[0021] The radio frequency front-end module provided by the present application does not need a filter device, reduces the complexity of the circuit, reduces the space occupied by the integrated circuit, is beneficial to the application of the radio frequency front-end module in a smaller scene, and improves the competitiveness of the product. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0023] Figure 1 A structural schematic diagram of a radio frequency front end module provided by an embodiment of the present application is shown in FIG. 2.
[0024] Figure 2 A circuit schematic diagram of the radio frequency front end module provided by the embodiment of the present application is shown in FIG. 3.
[0025] Figure 3 A structural schematic diagram of a radio frequency front end module provided by another embodiment of the present application is shown in FIG. 4.
[0026] Figure 4 A structural schematic diagram of a wireless communication module provided by an embodiment of the present application is shown in FIG. 5.
[0027] Legend: 1, duplexer; 2, multiplexer; 3, radio frequency antenna; K1, first radio frequency switch; K2, second radio frequency switch; K3, third radio frequency switch; K4, fourth radio frequency switch; L6, second inductor; L7, third inductor; C6, second capacitor. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments.
[0029] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art without creative labor on the basis of the embodiments in the present application are within the scope of the present application.
[0030] In the description of the present application, it should be noted that if the terms "upper", "lower", etc. indicate the orientation or position relationship shown in the drawings, or the orientation or position relationship in the usual use of the product of the present application, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be considered as limiting the present application.
[0031] Moreover, the terms "first", "second", and the like, in the description and in the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the use of such terms is arbitrary and the scope of the application should not be limited by such a mechanism. Furthermore, the terms "comprise", "comprising", "include", "including", and the like, are to be construed open-ended, i.e., in the sense of "including, but not limited to", to the extent not explicitly stated otherwise in this regards. It is to be understood that such terms are merely descriptive of certain examples of embodiments of the application, and do not, without further recursion, preclude the presence of one or more other features, functions, structures, or instances not expressly described.
[0032] In the description of the present application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0033] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.
[0034] First, the terms of the present application are explained: carrier aggregation (CA) is a technology that integrates wireless channel resources within or between frequency bands to improve user data transmission rate and reduce delay; ENDC stands for EUTRANR Dual-Connectivity, which means that 5G introduces dual connection (DC) technology under NSA architecture, and terminal equipment can be connected to 4G base station and 5G base station at the same time; sensitivity refers to the minimum receiver level, which is used to measure the degree of radio receiver response to input electric wave, the smaller the absolute value of sensitivity, the stronger the ability of the receiver to receive small signals; the isolation index directly indicates the attenuation of the signal, for example, the isolation between A and B is 20, which means that the signal of A will attenuate 20dB when reaching B, the greater the isolation, the smaller the interference caused by A to B.
[0035] In the carrier aggregation and dual connection (CA&ENDC) scenario, multiple carriers work together in the same antenna, so the common end must consider the carrier combining situation, in the design of radio frequency front-end architecture, the insertion loss and isolation of the device are the key, how to make the performance better and the architecture better is a major problem in the industry design.
[0036] Therefore, the application provides a radio frequency front-end module.
[0037] Figure 1 A structure diagram of the radio frequency front-end module provided by the application is shown in the figure. Figure 1 The radio frequency front-end module comprises a duplexer 1, a multiplexer 2 and a radio frequency antenna 3.
[0038] The first radio frequency end 11 and the second radio frequency end 12 of the duplexer 1 are respectively connected to the low frequency port and the intermediate frequency port of the radio frequency transceiver, the third radio frequency end 13 of the duplexer 1 is connected to the first radio frequency end 21 of the multiplexer 2, the second radio frequency end 22 and the third radio frequency end 23 of the multiplexer 2 are respectively connected to the high frequency port and the ultra-high frequency port of the radio frequency transceiver, and the fourth radio frequency end 24 of the multiplexer 2 is connected to the radio frequency antenna.
[0039] The low frequency port, the intermediate frequency port, the high frequency port and the ultra-high frequency port are all connected to a preset CPU, the low frequency port is used for receiving / sending a low frequency signal, the low frequency signal is a signal of 617-960 MHz, the intermediate frequency port is used for receiving / sending an intermediate frequency signal, the intermediate frequency signal is a signal of 1427-2200 MHz, the high frequency port is used for receiving / sending a high frequency signal, the high frequency signal is a signal of 2300-2690 MHz, and the ultra-high frequency port is used for receiving / sending an ultra-high frequency signal, the ultra-high frequency signal is a signal of 3300-4200 MHz.
[0040] The duplexer 1 can make the low frequency signal and the intermediate frequency signal share one antenna without mutual interference, and the size of the duplexer is 1.6*0.8mm 2 , and the area occupied by the circuit integration is small. The multiplexer 2 can make the high frequency signal, the ultra-high frequency signal and the signal received from the duplexer 1 share one antenna without mutual interference, and the size of the multiplexer 2 is 2.5*2.0mm 2 , and the area occupied by the circuit integration is small.
[0041] The radio frequency front-end module of the application combines the low frequency signal and the high frequency signal through the duplexer, optimizes the out-of-band suppression of the intermediate frequency signal at the same time, makes the high frequency and the ultra-high frequency pass through separate paths through the multiplexer, avoids the insertion loss, optimizes the out-of-band suppression of the high frequency, optimizes the return loss and the out-of-band suppression of the ultra-high frequency, and makes the device parameters more optimal.
[0042] The above structure enables the filter device to be omitted, removes the loss of the filter device itself, and improves the performance (power consumption and sensitivity) of the intermediate frequency, high frequency and ultrahigh frequency bands. Specifically, the current consumption of the high frequency is reduced by 200 mA, the efficiency is improved by about 25%, the high frequency sensitivity is improved by 1.5 dB or more, the low frequency sensitivity is improved by about 0.5 dB, the current consumption is reduced by about 50 mA, the efficiency is improved by about 10%, the ultrahigh frequency coexistence capability with WIFI is improved, and the performance is improved by 1 dB and the efficiency is improved by 15%.
[0043] In addition, in terms of space utilization, the radio frequency front-end module of the application does not need a filter device, reduces the complexity of the circuit, reduces the space occupied on the circuit board during circuit integration, is conducive to the application of the radio frequency front-end module in a smaller scene, and indirectly improves the ability of the product to support more frequency bands.
[0044] Figure 2 The circuit schematic diagram of the radio frequency front-end module provided by the embodiment of the application is shown in Figure 2 As shown in the figure, the radio frequency front-end module further comprises a first coupling unit, a second coupling unit and a third coupling unit.
[0045] The first coupling unit is connected between the third radio frequency end 13 of the duplexer 1 and the first radio frequency end 21 of the multiplexer 2, the second coupling unit is connected between the high frequency port and the second radio frequency end 22 of the multiplexer 2, and the third coupling unit is connected between the ultrahigh frequency port and the third radio frequency end 23 of the multiplexer. No coupling unit is added between the first radio frequency end 11 of the duplexer 1 and the low frequency port, and between the second radio frequency end 12 of the duplexer 1 and the intermediate frequency port, which is conducive to the coexistence of cellular and WIFI and obtains better throughput.
[0046] The first coupling unit, the second coupling unit and the third coupling unit each comprise an inductor, denoted as a first inductor, and a capacitor, denoted as a first capacitor.
[0047] For example Figure 2 The first coupling unit comprises an inductor L1 and a capacitor C1, the second coupling unit comprises an inductor L2 and a capacitor C2, and the third coupling unit comprises an inductor L3 and a capacitor C3. The function of each coupling unit is to realize power matching between different branches.
[0048] Continuing to refer to Figure 2The radio frequency front-end module further comprises a first radio frequency switch K1, a second radio frequency switch K2, a third radio frequency switch K3 and a fourth radio frequency switch K4, wherein the first radio frequency switch K1 is connected between the first radio frequency end 11 of the duplexer and the low frequency port, the second radio frequency switch K2 is connected between the second radio frequency end 12 of the duplexer and the intermediate frequency port, the third radio frequency switch K3 is connected between the second coupling unit and the high frequency port, and the fourth radio frequency switch K4 is connected between the third coupling unit and the ultra-high frequency port. The functions of the radio frequency switches are to realize the conduction / disconnection of the branch where the radio frequency switch is located by closing / opening the radio frequency switch, so that whether to use the branches of different frequency bands can be selected according to actual needs.
[0049] Figure 3 The structure diagram of the radio frequency front-end module provided for another embodiment of the application is shown in FIG. 6. Figure 3 The radio frequency front-end module further comprises a second inductor L6, a third inductor L7 and a second capacitor C6, and the fourth radio frequency end 24 of the multiplexer is connected to the radio frequency antenna in sequence through the second inductor L6, the third inductor L7 and the second capacitor C6. The function of the second inductor L6 is to adjust the load size on the branch where the second inductor L6 is located, the function of the third inductor L7 is to prevent static electricity and protect the circuit, and the function of the second capacitor C6 is to pass alternating current and block direct current, so as to avoid damage to the circuit caused by the user's mistake of connecting direct current. The second capacitor C6 also protects the circuit.
[0050] On the basis of the above-mentioned embodiments, the application further provides a wireless communication module, as shown in FIG. 6. Figure 4 The wireless communication module comprises a radio frequency transceiver, a power amplifier, a low noise amplifier, a filter and the radio frequency front-end module of any one of the above-mentioned embodiments.
[0051] Referring to FIG. 6, Figure 4 The radio frequency transceiver has a transmitting end and a receiving end, the transmitting end of the radio frequency transceiver is connected to the radio frequency front-end module in sequence through the power amplifier and the filter, and the radio frequency front-end module is further connected to the receiving end of the radio frequency transceiver in sequence through the filter and the low noise amplifier.
[0052] That is, the wireless communication module has the functions of transmitting signals and / or receiving signals, wherein the communication link of the transmitting signals is that the signals to be transmitted pass through the transmitting end of the radio frequency transceiver, the power amplifier and the filter in sequence, and are then emitted by the radio frequency antenna in the radio frequency front-end module; and the communication link of the receiving signals is that the signals to be received pass through the radio frequency antenna in the radio frequency front-end module, the filter and the low noise amplifier in sequence, and are then received by the receiving end of the radio frequency transceiver.
[0053] The application further provides a wireless communication device comprising at least the above-mentioned wireless communication module, and the wireless communication device can communicate by using the above-mentioned wireless communication module to realize the sharing of one antenna by multiple frequency bands.
[0054] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A radio frequency front end module, characterized by include: A duplexer, a multiplexer, and a radio frequency antenna; wherein the first radio frequency end and the second radio frequency end of the duplexer are respectively used to connect to the low frequency port and the intermediate frequency port of the radio frequency transceiver, the third radio frequency end of the duplexer is connected to the first radio frequency end of the multiplexer, the second radio frequency end and the third radio frequency end of the multiplexer are respectively used to connect to the high frequency port and the ultra-high frequency port of the radio frequency transceiver, and the fourth radio frequency end of the multiplexer is connected to the radio frequency antenna.
2. The radio frequency front-end module of claim 1, wherein, The RF front-end module further includes: a first coupling unit, a second coupling unit, and a third coupling unit; The first coupling unit is connected between the third RF terminal of the duplexer and the first RF terminal of the multiplexer, the second coupling unit is connected between the high frequency port and the second RF terminal of the multiplexer, and the third coupling unit is connected between the ultra-high frequency port and the third RF terminal of the multiplexer.
3. The radio frequency front-end module of claim 2, wherein, The RF front-end module further includes: a first RF switch connected between the first RF end of the duplexer and the low-frequency port.
4. The radio frequency front-end module of claim 2, wherein, The RF front-end module further includes: a second RF switch connected between the second RF terminal of the duplexer and the intermediate frequency port.
5. The radio frequency front end module of claim 2, wherein, The RF front-end module further includes: a third RF switch connected between the second coupling unit and the high-frequency port.
6. The radio frequency front-end module of claim 2, wherein, The RF front-end module further includes: a fourth RF switch connected between the third coupling unit and the UHF port.
7. The radio frequency front end module of claim 2, wherein, The first coupling unit, the second coupling unit and the third coupling unit each include: a first inductor and a first capacitor.
8. The radio frequency front-end module of claim 1, wherein, The RF front-end module further includes: a second inductor, a third inductor and a second capacitor; The fourth RF terminal of the multiplexer is connected to the RF antenna through the second inductor, the third inductor and the second capacitor in sequence.
9. A wireless communication module, characterized by include: A radio frequency transceiver, a power amplifier, a low noise amplifier, a filter, and a radio frequency front-end module according to any one of claims 1 to 8; The transmitting end of the radio frequency transceiver is connected to the radio frequency front-end module through the power amplifier and the filter in sequence; The RF front-end module is also connected to the receiving end of the RF transceiver through the filter and the low-noise amplifier in sequence.
10. A wireless communication device, comprising: At least: The wireless communication module according to claim 9.