Radio frequency circuit and electronic equipment

Abstract

The utility model relates to the technical field of communication, in particular to a radio frequency circuit and electronic equipment. The circuit comprises at least two matching circuits, configuration parameters of different matching circuits are adapted to different channels, and first ends of the matching circuits are connected with a receiving and transmitting port; a control module; the common end of the gating switch is connected with a radio frequency antenna, and the signal receiving end of the gating switch is connected with the control module and is used for receiving a control signal sent by the control module; the control signal is used for controlling the non-common end of the gating switch to be selectively communicated with the second end of any one of the at least two matching circuits. Based on the embodiment of the invention, each channel can be provided with the matching circuit with the adaptive configuration parameters, so that the power loss caused by inadaptive configuration parameters of the matching circuit is avoided, the situation that multiple channels use the same set of configuration parameters is avoided, and the wifi performance is prevented from being influenced.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a radio frequency circuit and electronic device. Background Technology

[0002] With the development of Wi-Fi technology, Wi-Fi can communicate across multiple channels.

[0003] In related technologies, when Wi-Fi switches channels from the first channel to the second channel, Wi-Fi performance may decrease, resulting in problems such as slow network speed, lag, and disconnection. Utility Model Content

[0004] To overcome the problems existing in related technologies, this disclosure provides a radio frequency circuit and electronic device that can solve the above-mentioned problems.

[0005] According to a first aspect of the present disclosure, a radio frequency circuit is provided, the circuit comprising: at least two matching circuits, different configuration parameters of the matching circuits being adapted to different channels, a first terminal of the matching circuit being connected to a transceiver port; a control module; and a gating switch, the common terminal of the gating switch being connected to a radio frequency antenna, the signal receiving terminal of the gating switch being connected to the control module for receiving a control signal sent by the control module, the control signal being used to control the non-common terminal of the gating switch to selectively connect to the second terminal of any one of the at least two matching circuits.

[0006] According to a second aspect of the present disclosure, an electronic device is provided, the electronic device including the radio frequency circuit as described in the first aspect.

[0007] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0008] The present disclosure configures at least two matching circuits, whose configuration parameters are adapted to different channels. A gating switch allows any one of the at least two matching circuits to be selectively connected to the radio frequency antenna. Based on embodiments of the present disclosure, each channel can have a matching circuit with adapted configuration parameters, thereby avoiding power loss due to mismatched matching circuit configuration parameters, preventing multiple channels from using the same set of configuration parameters, and avoiding any impact on Wi-Fi performance.

[0009] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0010] The accompanying drawings, which are incorporated in and form part of this disclosure, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0011] Figure 1 This is a schematic diagram of the structure of a radio frequency circuit according to an exemplary embodiment of the present disclosure.

[0012] Figure 2 This disclosure is a schematic diagram of a matching circuit adapted to a 5G band channel according to an exemplary embodiment.

[0013] Figure 3 This disclosure is a schematic diagram of a matching circuit adapted to a 6E band channel according to an exemplary embodiment.

[0014] Figure 4 This disclosure illustrates, according to an exemplary embodiment, the relationship between frequency band and scattering parameters of a radio frequency circuit employing a first matching circuit under test.

[0015] Figure 5 This disclosure illustrates, according to an exemplary embodiment, the relationship between frequency band and scattering parameters of a radio frequency circuit employing a second matching circuit under test.

[0016] Figure 6 This is a schematic diagram of the structure of a radio frequency circuit according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0017] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0018] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0019] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0020] Currently, the frequency bands of Wi-Fi 5G and 6E cover 5.1GHz to 7.1GHz, with a bandwidth of 2GHz. Wi-Fi 5G is currently more widely used and the technology is more mature.

[0021] In some embodiments, the first channel and the second channel use the same matching circuit.

[0022] Because Wi-Fi 5G has a wider range of applications and more mature technology, the 6E frequency band can be incorporated into the existing RF circuit of Wi-Fi 5G, enabling the switching between Wi-Fi 5G and Wi-Fi 6E without changing the RF circuit and matching circuit.

[0023] However, the wider frequency bands of 5G and 6E cannot achieve perfect coverage with a single matching circuit. When configuration parameters are mismatched, significant losses occur in the radio frequency circuitry. Specifically, to ensure the performance of Wi-Fi 5G, the matching circuit's configuration parameters are set to adapt to the 5G frequency band channel. In this case, since 6E and 5G use the same matching circuit, when switching from 5G to 6E, the channel and matching circuit configuration parameters become incompatible. This significantly impacts Wi-Fi communication performance under 6E, resulting in slow speeds, stuttering, and disconnections.

[0024] To address the aforementioned technical problems, this disclosure proposes a radio frequency circuit.

[0025] Figure 1 This is a schematic diagram of a radio frequency (RF) circuit according to an embodiment of the present disclosure. The RF circuit can be configured in a terminal. The terminal can perform wireless communication based on this RF circuit. The terminal includes, but is not limited to, communication devices such as mobile phones, tablets, wearable devices, sensors, and Internet of Things (IoT) devices.

[0026] like Figure 1 As shown, the radio frequency circuit includes:

[0027] At least two matching circuits 111 and 112, with different configuration parameters of the matching circuits adapted to different channels, and the first end of the matching circuit is connected to the transceiver port 120;

[0028] Control module 130;

[0029] A gating switch 140 is provided, the common terminal of which is connected to the radio frequency antenna 150. The signal receiving terminal of the gating switch 140 is connected to the control module 130 and is used to receive the control signal sent by the control module 130. The control signal is used to control the non-common terminal of the gating switch 140 to selectively connect to the second terminal of any of the at least two matching circuits.

[0030] In some embodiments, different configuration parameters of the matching circuit are adapted to different channels.

[0031] like Figure 1 As shown, the configuration parameters of matching circuit 111 and matching circuit 112 are different, and the channels adapted to matching circuit 111 are also different from those adapted to matching circuit 112.

[0032] In the embodiments of this disclosure, the configuration parameters of the matching circuit are adapted to the channel, indicating that when the matching circuit adopts specific configuration parameters, it can have a better communication effect on the channel adapted to the specific configuration parameters, without the wireless communication effect being affected by severe loss.

[0033] In some embodiments, the first end of the matching circuit is connected to the transceiver port.

[0034] The transceiver port (TRx) is connected to the internal circuitry of the terminal and is used to transmit received radio frequency signals to the terminal or to transmit radio frequency signals to be sent by the terminal to the radio frequency antenna.

[0035] In some embodiments, the gating switch includes a single-pole double-throw (SPDT) switch.

[0036] The gating switch can select any one of at least two matching circuits to connect to the radio frequency antenna, thereby enabling the radio frequency antenna to have better communication performance on the channel adapted by the selected matching circuit.

[0037] When wireless communication switches from one channel to another, the gating switch can be switched by the control module to connect to another matching circuit that is compatible with the other channel and the radio frequency antenna. This ensures that wireless communication still has good communication performance and does not affect the communication performance due to the large loss of the radio frequency circuit caused by the mismatch between the configuration parameters of the switched channel and the matching circuit.

[0038] For example, matching circuit 111 is adapted to the first channel, and matching circuit 112 is adapted to the second channel. When matching circuit 111 is connected to RF antenna 150 via gating switch 140, the RF circuit has good communication performance on the first channel adapted to matching circuit 111.

[0039] When wireless communication switches from the first channel to the second channel, if the matching circuit 111 is still used for communication, the matching circuit 111 is not compatible with the second channel, resulting in a large scattering parameter (S-parameter) and poor performance, leading to poor wireless communication performance. However, if the matching circuit 111 is switched to the matching circuit 112 through the gating switch 140, the matching circuit 112 is compatible with the second channel, so wireless communication can also have good communication performance on the second channel.

[0040] In embodiments of this disclosure, at least two matching circuits are provided in the radio frequency (RF) circuit, and the configuration parameters of different matching circuits are adapted to different channels. A selection switch allows any one of the at least two matching circuits to be connected to the RF antenna. Therefore, the RF circuit of this disclosure can be adapted to multiple different channels. By selecting a matching circuit adapted to the channel, the RF circuit can achieve good communication performance in different wireless communication channels.

[0041] In some embodiments, the at least two matching circuits include a first matching circuit and a second matching circuit, wherein the configuration parameters of the first matching circuit are adapted to a first channel, and the configuration parameters of the second matching circuit are adapted to a second channel.

[0042] In some embodiments, the first channel includes a 5G band channel, and the second channel includes a 6E band channel.

[0043] The configuration parameters of the first matching circuit are adapted to the 5G band channel, and the configuration parameters of the second matching circuit are adapted to the 6E band channel.

[0044] By setting up a matching circuit that is compatible with the channel, the radio frequency circuit can have good S-parameter performance in each frequency band, achieve good impedance matching, and thus avoid serious loss and degraded Wi-Fi performance.

[0045] For the first matching circuit and the second matching circuit, parameter configurations corresponding to the S-parameters of each frequency point under the corresponding channel are used, so that the first matching circuit and the second matching circuit can achieve the ideal radio frequency circuit configuration under the corresponding frequency band.

[0046] In some embodiments, the configuration parameters of the matching circuit include at least one of the following: capacitance and inductance.

[0047] Figure 2 This is a schematic diagram illustrating the structure of a matching circuit adapted to a 5G frequency band channel according to an embodiment of the present disclosure. Figure 3 This is a schematic diagram of a matching circuit adapted to a 6E band channel, according to an embodiment of the present disclosure.

[0048] like Figure 2 As shown, in some embodiments, the first matching circuit adapted to the 5G band channel may include a first capacitor C1, a second capacitor C2, and a first inductor L1.

[0049] Resistor Term1 and resistor Term2 are ports of the analog signal source and load. In the embodiments of this disclosure, resistor Term1 may represent a transceiver port, and resistor Term2 may represent a gating switch and an RF antenna.

[0050] like Figure 2 As shown, the first terminal of the first capacitor C1 is connected to the transceiver port, and the second terminal of the first capacitor C1 is grounded; the first terminal of the first inductor L1 is connected to the transceiver port, and the second terminal of the first inductor L1 is the second terminal of the first matching circuit, which is selectively connected to the non-common terminal of the selection switch; the first terminal of the second capacitor C2 is connected to the second terminal of the first inductor L1, and the second terminal of the second capacitor C2 is grounded.

[0051] In some embodiments, the value of the first capacitor C1 is 1.0 pF (picofarad), the value of the second capacitor C2 is 1.0 pF (picofarad), and the value of the first inductor L1 is 1.2 nH (nanohyn).

[0052] Figure 4 This is a schematic diagram illustrating the relationship between frequency band and scattering parameters under test for an RF circuit employing a first matching circuit, according to an embodiment of the present disclosure.

[0053] like Figure 4 As shown, Figure 4 The S-parameters at each frequency point in S(1,1) were tested based on the configuration parameters of this embodiment. With the impedance of resistors Term1 and Term2 at 50 Ohms, tests showed that, based on this first matching circuit, the S(1,1) parameters for the 5G band (5.180~5.875GHz) were all less than -10dB, indicating that the RF circuit using the first matching circuit has good wireless communication performance in this frequency band. Specifically, at the 5G edge frequency of 5.880GHz, the S(1,1) parameters can reach -19.309dB.

[0054] However, based on Figure 4As can be seen, although the S-parameter of the first matching circuit is small near the 5G band and has good wireless communication performance, when it reaches the 6E band, such as 6.4GHz and above, the S-parameter of the first matching circuit is greater than -10dB. This indicates that at 6.4GHz and above, the RF circuit reflects more signals and absorbs them poorly, which affects the wireless communication performance.

[0055] Therefore, when the radio frequency circuit operates in the 6E band channel, it is necessary to use a second matching circuit adapted to the 6E band channel.

[0056] like Figure 3 As shown, in some embodiments, the second matching circuit adapted to the 6E band channel may include a second inductor L2 and a third capacitor C3.

[0057] The first end of the second inductor L2 is connected to the transceiver port, and the second end of the second inductor L2 is grounded; the first end of the third capacitor C3 is connected to the transceiver port, and the second end of the third capacitor C3 is the second end of the second matching circuit, which is selectively connected to the non-common terminal of the gating switch.

[0058] In some embodiments, the value of the second inductor L2 is 4.3 nH (nanohyn) and the value of the third capacitor C3 is 0.6 pF (picofarad).

[0059] Figure 5 This is a schematic diagram illustrating the relationship between frequency band and scattering parameters under test for an RF circuit employing a first matching circuit, according to an embodiment of the present disclosure.

[0060] like Figure 5 As shown, Figure 5 The S-parameters at each frequency point in S(1,1) were tested based on the configuration parameters of this embodiment. With the impedance of resistors Term1 and Term2 at 50 Ohms, tests showed that, based on this second matching circuit, the S(1,1) parameters for the 6E band (5.875–7.115 GHz) were all less than -10 dB, indicating that the RF circuit using the second matching circuit has good wireless communication performance in this frequency band channel. Specifically, at the 5.880 GHz frequency point, the S(1,1) parameter was -10.168 dB.

[0061] In some embodiments, the transceiver port includes one, and the first ends of the at least two matching circuits are all connected to the transceiver port.

[0062] However, this connection method may lead to significant power leakage and reduce the effectiveness of wireless communication because there may be interference between the components in at least two matching circuits.

[0063] In some embodiments, the transceiver ports include at least two, wherein a first transceiver port of the at least two transceiver ports is connected to a first terminal of the first matching circuit, and a second transceiver port of the at least two transceiver ports is connected to a first terminal of the second matching circuit.

[0064] The number of transceiver ports can be multiple, each corresponding to at least two matching circuits, thereby avoiding the power leakage problem mentioned in the previous embodiment.

[0065] In some embodiments, the number of transceiver ports can be four.

[0066] Figure 6 This is a schematic diagram of the structure of a radio frequency circuit according to an embodiment of the present disclosure.

[0067] like Figure 6 As shown, in some embodiments, the number of gating switches is multiple, the common terminal of each gating switch is connected to a radio frequency antenna, the at least two matching circuits include at least two matching circuit groups, each matching circuit group includes at least two matching circuits, and the non-common terminal of each gating switch is selectively connected to any matching circuit in the corresponding matching circuit group.

[0068] The number of gating switches can be N, and the corresponding number of RF antennas is also N. At least two matching circuits can be divided into N matching circuit groups, each group containing at least two matching circuits. The common terminal of the i-th gating switch is connected to the i-th RF antenna, and the non-common terminal of the i-th gating switch selectively connects to any matching circuit in the i-th matching circuit group. Here, N and i are positive integers, and i is less than or equal to N.

[0069] For example, the number of gating switches can be at least two, and the corresponding number of radio frequency antennas can also be at least two. Multi-antenna architectures are beneficial for increasing channel capacity, improving data transmission rates, enhancing signal quality, and improving system robustness and reliability.

[0070] In some embodiments, when at least two gating switches 141, 142 and at least two radio frequency antennas 151, 152 are included, the control module 130 can be used to control the at least two gating switches 141, 142 to achieve switching between the same channels of different antennas through control signals, and / or to achieve switching from the first channel to the second channel.

[0071] In some embodiments, the radio frequency antenna includes a first radio frequency antenna 151 and a second radio frequency antenna 152, wherein the matching circuit 111 adapted to the first channel corresponding to the first radio frequency antenna 151 is different from the matching circuit 113 adapted to the first channel corresponding to the second radio frequency antenna 152.

[0072] by Figure 6 For example, the configuration parameters of matching circuit 111 are adapted to the first channel of the RF circuit where RF antenna 151 is located, and the configuration parameters of matching circuit 113 can be adapted to the first channel of the RF circuit where RF antenna 152 is located. The configuration parameters of matching circuit 111 are not the same as the configuration parameters of matching circuit 113. Based on the control signal, the communication of the RF circuit on the 5G band channel can be switched from the matching circuit 111 of RF antenna 151 to the matching circuit 113 of RF antenna 152.

[0073] In some embodiments, the radio frequency antenna includes a first radio frequency antenna 151 and a second radio frequency antenna 152, and the gating switch includes a first gating switch 141 and a second gating switch 142. The first radio frequency antenna 151 is connected to the common terminal of the first gating switch 141, and the matching circuit groups 111 and 112 corresponding to the non-common terminal of the first gating switch 141 are adapted to the first radio frequency antenna 151. The second radio frequency antenna 152 is connected to the second gating switch 142, and the matching circuit groups 113 and 114 corresponding to the non-common terminal of the second gating switch 142 are adapted to the second radio frequency antenna 152.

[0074] The configuration parameters used in the matching circuit must take into account not only the frequency band and channel in which it operates, but also the RF antenna and transceiver ports. Therefore, even in the same terminal, the configuration parameters of the matching circuit for the same channel corresponding to different RF antennas may differ.

[0075] In some embodiments, the circuit further includes a radio frequency (RF) front-end chip, a first terminal of which is connected to the common terminal of the gating switch, and a second terminal of which is connected to the radio frequency antenna. The RF front-end chip is used for at least one of the following: amplifying the radio frequency signal; and switching the receiving and transmitting states of the radio frequency antenna.

[0076] On the one hand, the FEM can amplify the radio frequency signal to enhance signal quality; on the other hand, since wireless communication is a time-division technology, the control module 130 needs to control the radio frequency front-end module (FEM) to be in a receiving or transmitting state. In embodiments of this disclosure, the FEM is also used to determine the operating channel of the radio frequency circuit.

[0077] In some embodiments, the control signal includes a radio frequency front end (RFFE) control signal.

[0078] RFFE control signals can be applied between various devices in radio frequency circuits. In the event of channel switching, RFFE control signals can prevent users from experiencing communication delays caused by the switching.

[0079] Embodiments of this disclosure also provide an electronic device comprising a radio frequency circuit as described in any of the foregoing embodiments.

[0080] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0081] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

[0082] 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, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0083] The methods and apparatus provided in the embodiments of this disclosure have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this disclosure. The descriptions of the embodiments above are only for the purpose of helping to understand the methods and core ideas of this disclosure. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this disclosure. Therefore, the content of this specification should not be construed as a limitation of this disclosure.

Claims

1. A radio frequency circuit, characterized in that, The circuit includes: At least two matching circuits, with different configuration parameters for each matching circuit adapted to different channels, and the first end of each matching circuit connected to a transceiver port; Control module; A gating switch is provided, wherein the common terminal of the gating switch is connected to the radio frequency antenna, and the signal receiving terminal of the gating switch is connected to the control module for receiving control signals sent by the control module. The control signals are used to control the non-common terminal of the gating switch to selectively connect to the second terminal of any one of the at least two matching circuits.

2. The circuit according to claim 1, characterized in that, The at least two matching circuits include a first matching circuit and a second matching circuit, wherein the configuration parameters of the first matching circuit are adapted to the first channel, and the configuration parameters of the second matching circuit are adapted to the second channel.

3. The circuit according to claim 2, characterized in that, The first channel includes a 5G band channel, and the second channel includes a 6E band channel.

4. The circuit according to claim 2, characterized in that, The transceiver ports include at least two, with the first transceiver port of the at least two transceiver ports connected to the first terminal of the first matching circuit, and the second transceiver port of the at least two transceiver ports connected to the first terminal of the second matching circuit.

5. The circuit according to claim 1, characterized in that, The number of gating switches is multiple, and the common terminal of each gating switch is connected to a radio frequency antenna. The at least two matching circuits include at least two matching circuit groups, and each matching circuit group includes at least two matching circuits. The non-common terminal of each gating switch is selectively connected to any matching circuit in the corresponding matching circuit group.

6. The circuit according to claim 5, characterized in that, The radio frequency antenna includes a first radio frequency antenna and a second radio frequency antenna. The gating switch includes a first gating switch and a second gating switch. The first radio frequency antenna is connected to the common terminal of the first gating switch. The matching circuit group corresponding to the non-common terminal of the first gating switch is adapted to the first radio frequency antenna. The second radio frequency antenna is connected to the second gating switch. The matching circuit group corresponding to the non-common terminal of the second gating switch is adapted to the second radio frequency antenna.

7. The circuit according to claim 1, characterized in that, The circuit also includes an radio frequency front-end chip. The first terminal of the RF front-end chip is connected to the common terminal of the gating switch, and the second terminal of the RF front-end chip is connected to the RF antenna. The RF front-end chip is used for at least one of the following: Amplify radio frequency signals; Switch the receiving and transmitting states of the radio frequency antenna.

8. The circuit according to any one of claims 1-7, characterized in that, The configuration parameters include at least one of the following: capacitance; inductance.

9. The circuit according to any one of claims 1-7, characterized in that, The control signals include: radio frequency front-end control signals.

10. An electronic device, characterized in that, The electronic device includes the circuitry described in any one of claims 1-7.

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