Radio frequency power protection method, protection circuit, protection device and terminal equipment

Abstract

The present disclosure relates to a radio frequency power protection method, a protection circuit, a protection device and a terminal device. The radio frequency power protection method comprises: obtaining a radio frequency power amplification signal output by a radio frequency power amplifier to a radio frequency device; comparing the radio frequency power amplification signal with a set threshold signal; and controlling whether the radio frequency power amplifier outputs the radio frequency power amplification signal to the radio frequency device according to a comparison result of the radio frequency power amplification signal and the set threshold signal. Through the technical solution of the present disclosure, the radio frequency device can be effectively prevented from being burned out, and the safety of the terminal device is improved.

Description

Technical Field

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

[0002] The radio frequency (RF) section in mobile communications features RF amplification. Amplified RF signals generate high voltage and high current, meaning they possess high power. RF devices receiving signals have limited power capacity; if the power of the amplified RF signal exceeds the maximum power of the receiving RF device, it can easily burn out. During calibration, signaling transmission, and non-signaling transmission, there are situations where maximum power transmission occurs, and in these cases, there is a risk of burning out the RF devices in the mobile terminal.

[0003] In existing technologies, power limiting is generally achieved through radio frequency (RF) power detection. Power couplers can be used for power detection, and their closed-loop control of RF power can be very precise. However, in non-signaling states or if the power coupler fails, power cannot be controlled, potentially leading to sudden high power surges that burn out RF devices. Therefore, protecting RF path components from sudden high power surges is a pressing issue that needs to be addressed. Summary of the Invention

[0004] To solve the above-mentioned technical problems, or at least partially solve them, this disclosure provides a radio frequency power protection method, protection circuit, protection device, and terminal equipment, which can effectively prevent radio frequency devices from being burned out and improve the safety of terminal equipment.

[0005] In a first aspect, this disclosure provides a radio frequency power protection method including:

[0006] Obtain the RF power amplification signal output from the RF power amplifier to the RF device;

[0007] The amplified radio frequency power signal is compared with a set threshold signal;

[0008] The radio frequency power amplifier is controlled to output the radio frequency power amplification signal to the radio frequency device based on the comparison result between the radio frequency power amplification signal and the set threshold signal.

[0009] Optionally, controlling whether the radio frequency power amplifier outputs the radio frequency power amplification signal to the radio frequency device based on the comparison result of the radio frequency power amplification signal and the set threshold signal includes:

[0010] When the level value of the RF power amplification signal is less than or equal to the level value of the set threshold signal, the RF power amplifier is controlled to output the RF power amplification signal to the RF device;

[0011] When the level of the RF power amplification signal is greater than the level of the set threshold signal, the RF power amplifier is controlled to stop outputting the RF power amplification signal to the RF device.

[0012] Optionally, before comparing the radio frequency power amplification signal with the set threshold signal, the method further includes:

[0013] The set threshold signal is dynamically calibrated based on the radio frequency power amplification signal; wherein the power value of the set threshold signal is equal to the sum of the power value of the radio frequency power amplification signal and the set calibration power.

[0014] Optionally, before dynamically calibrating the set threshold signal based on the radio frequency power amplification signal, the method further includes:

[0015] Adjust the level of the set threshold signal to the set lower limit level to control the RF power amplifier to stop outputting the RF power amplification signal to the RF device.

[0016] Secondly, this disclosure also provides a radio frequency power protection circuit, including:

[0017] A signal extraction circuit and a comparison circuit are provided. The signal extraction circuit is configured to correspond to the output connection line from the RF power amplifier to the RF device. The comparison circuit is electrically connected to both the signal extraction circuit and the RF power amplifier.

[0018] The signal extraction circuit is used to extract the RF power amplification signal output by the RF power amplifier to the RF device and send it to the comparison circuit. The comparison circuit is used to compare the RF power amplification signal with a set threshold signal and control whether the RF power amplifier outputs the RF power amplification signal to the RF device based on the comparison result of the RF power amplification signal and the set threshold signal.

[0019] Optionally, the signal extraction circuit includes:

[0020] A coupling element, wherein a first coupling terminal of the coupling element is electrically connected to the radio frequency power amplifier, a second coupling terminal of the coupling element is electrically connected to the radio frequency device, and a third coupling terminal of the coupling element is grounded or grounded through a resistor;

[0021] A unidirectional conducting element, wherein the anode of the unidirectional conducting element is grounded, and the cathode of the unidirectional conducting element is electrically connected to the fourth coupling terminal of the coupling element and is used to output the coupled radio frequency power amplification signal to the comparator circuit.

[0022] Optionally, the comparison circuit includes:

[0023] The comparator has its non-inverting input connected to the RF power amplifier signal, its inverting input connected to the set threshold signal, and its output electrically connected to the enable input of the RF power amplifier.

[0024] Optionally, the radio frequency power protection circuit further includes:

[0025] The radio frequency transceiver circuit is electrically connected to the comparison circuit, and the radio frequency transceiver circuit is used to output the set threshold signal to the comparison circuit.

[0026] Thirdly, this disclosure also provides a radio frequency power protection device, comprising:

[0027] The signal acquisition module is used to acquire the RF power amplification signal output from the RF power amplifier to the RF device;

[0028] The comparison module is used to compare the radio frequency power amplification signal with a set threshold signal;

[0029] The control module is used to control whether the radio frequency power amplifier outputs the radio frequency power amplification signal to the radio frequency device based on the comparison result between the radio frequency power amplification signal and the set threshold signal.

[0030] Fourthly, this disclosure also provides a terminal device, including the radio frequency power protection circuit as described in the second aspect, or including a radio frequency power protection device for performing the radio frequency power protection method described in the first aspect.

[0031] The radio frequency (RF) power protection method provided in this disclosure includes: acquiring the RF power amplification signal output from the RF power amplifier to the RF device; comparing the RF power amplification signal with a set threshold signal; and controlling whether the RF power amplifier outputs the RF power amplification signal to the RF device based on the comparison result of the RF power amplification signal and the set threshold signal. Therefore, this embodiment of the disclosure utilizes the comparison process of the RF power amplification signal and the set threshold signal to control whether the RF power amplifier outputs the RF power amplification signal to the RF device, realizing real-time detection of the RF power amplification signal output from the RF power amplifier to the RF device. When the corresponding parameter of the RF power amplification signal is greater than the corresponding parameter of the set threshold signal, the RF power amplifier can be controlled to stop outputting the RF power amplification signal to the RF device, preventing the RF device from being burned out and improving the security of the terminal device. Attached Figure Description

[0032] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0033] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0034] Figure 1 A schematic flowchart illustrating a radio frequency power protection method provided in this embodiment of the disclosure;

[0035] Figure 2 This is a schematic diagram of the structure of a radio frequency power protection circuit provided in an embodiment of the present disclosure;

[0036] Figure 3 This is a schematic diagram of the structure of a radio frequency power protection device provided in an embodiment of this disclosure;

[0037] Figure 4 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this disclosure. Detailed Implementation

[0038] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0039] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0040] This is a flowchart illustrating a radio frequency (RF) power protection method provided in an embodiment of this disclosure. The RF power protection method can be applied in application scenarios requiring protection of RF power devices, and can be executed by the RF power protection device provided in this embodiment. This RF power protection device can be implemented using software and / or hardware. Figure 1 As shown, the radio frequency power protection method includes:

[0041] S101. Obtain the RF power amplification signal output from the RF power amplifier to the RF device.

[0042] Figure 2 This is a schematic diagram of the structure of a radio frequency power protection circuit provided in an embodiment of this disclosure, as shown below. Figure 2 As shown, the RF power amplifier 3 can be, for example, a power amplifier or a low-noise amplifier. The RF devices may include, for example, a first switch 51, a second switch 52, a Band1 duplexer 61, a Band3 duplexer 62, a Band7 duplexer 63, a Band41 Tx filter 64, a Band41 Rx filter 65, and a second coupling element 7. The RF power amplifier 3 is connected to the first switch 51. After receiving the RF signal emitted from the high-frequency transmitting port in the RF transceiver circuit 4, the RF power amplifier 3 amplifies it and outputs an RF power amplified signal to the first switch 51. The first switch 51 is connected to different duplexers and filters through different contacts, thereby enabling the RF power amplified signal to be transmitted to the antenna 8 through different RF branches.

[0043] For example, the first switch 51 can be a single-pole four-throw switch. The four contacts of the single-pole four-throw switch are respectively connected to the transmitting end Band1 Tx of Band1 duplexer 61, the transmitting end Band3 Tx of Band3 duplexer 62, the transmitting end Band7 Tx of Band7 duplexer 63, and the Band41 Tx filter 64. The common terminal of Band1 duplexer 61, Band3 duplexer 62, and Band7 duplexer 63 and the Band41 Rx filter 65 are connected to the contacts of the second switch 52. The second switch 52 can be a single-pole five-throw switch. The first end of the second coupling element 7 is electrically connected to the single-pole five-throw switch. The second end of the second coupling element 7 is connected to the antenna 8. The third end of the second coupling element 7 is grounded or grounded through a resistor. The resistance value can be, for example, 50 ohms. The fourth end of the second coupling element 7 is connected to the power detection port of the radio frequency transceiver circuit 4. The radio frequency transceiver circuit 4 can receive the signal extracted by the antenna 8 from the second coupling element 7.

[0044] Therefore, the radio frequency signal transmitted by the radio frequency transceiver circuit 4 is amplified by the radio frequency power amplifier 3 and then input to the Band1 duplexer 61, Band3 duplexer 62, Band7 duplexer 63 or Band41 Tx filter 64, and transmitted to the antenna 8 through the second switch 52 and the second coupling element 7. The radio frequency signal received by the antenna 8 can also be transmitted to the Band1 duplexer 61, Band3 duplexer 62, Band7 duplexer 63 or Band41 Rx filter 65 through the second switch 52 and the second coupling element 7. After being filtered by the Band1 duplexer 61, Band3 duplexer 62, Band7 duplexer 63 or Band41 Rx filter 65, it is transmitted back to the radio frequency transceiver circuit 4. Thus, the simultaneous transmission and reception of Band1 signal, Band3 signal, Band7 signal, Band41 Tx signal or Band41 Rx signal can be achieved by toggling the single-pole four-throw switch and the single-pole five-throw switch. Figure 2 The example shows that the radio frequency power amplifier 3 is connected to the Band 1 duplexer via a first switch 51, and the antenna 8 is connected to the Band 1 duplexer 61 via a second switch 52 and a second coupling element 7, thereby realizing the transmission and reception of Band 1 signals.

[0045] It should be noted that the types and quantities of radio frequency devices can be set according to the radio frequency circuit of the terminal device, and this disclosure does not limit this.

[0046] S102. Compare the RF power amplification signal with the set threshold signal.

[0047] Specifically, in order to prevent the power of the RF power amplifier signal output by the RF power amplifier 3 from exceeding the maximum power of the RF device and causing the RF device to burn out, this embodiment compares the RF power amplifier signal with a set threshold signal. When the corresponding parameter of the RF power amplifier signal is greater than the corresponding parameter of the set threshold signal, it indicates that the power of the RF power amplifier signal is abnormal and is likely to cause the RF device to burn out. The operation of the RF power amplifier 3 should be stopped in time to protect the RF power amplifier 3 itself and the safety of the RF device.

[0048] Optionally, before comparing the RF power amplification signal with the set threshold signal, the method further includes: dynamically calibrating the set threshold signal based on the RF power amplification signal; wherein the power value of the set threshold signal is equal to the sum of the power value of the RF power amplification signal and the set calibration power.

[0049] Specifically, before comparing the RF power amplification signal with the set threshold signal, it is necessary to dynamically calibrate the power value of the set threshold signal based on the power value of the RF power amplification signal. That is, the power value of the set threshold signal will be different depending on the power value of the RF power amplification signal. For example, when antenna 8 needs to receive a 10dBm RF power amplified signal, considering the loss that occurs during signal transmission of the RF device, for example, a 5dB loss, the RF power amplifier 3 needs to output 15dBm. The calibration power is set as a margin, for example, 3dB, and the power value of the threshold signal is then set to 18dBm. When antenna 8 needs to receive a 23dBm RF power amplified signal, considering the loss that occurs during signal transmission of the RF device, for example, a 5dB loss, the RF power amplifier 3 needs to output 28dBm. The calibration power is set as a margin, for example, 3dB, and the power value of the threshold signal is then set to 31dBm. This achieves dynamic calibration of the threshold signal, meaning the threshold signal can be adjusted according to the magnitude of the RF power amplified signal and the signal received by antenna 8, thereby improving the flexibility of RF device protection.

[0050] Optionally, before dynamically calibrating the set threshold signal based on the RF power amplification signal, the method further includes: adjusting the level of the set threshold signal to a set lower limit level to control the RF power amplifier 3 to stop outputting the RF power amplification signal to the RF device.

[0051] Specifically, before the dynamic calibration setting threshold signal, the exact magnitude of the RF power amplification signal cannot be known. Therefore, in order to further protect the RF device, before the dynamic calibration setting threshold signal, the level of the setting threshold signal is set to the lower limit level. For example, the lower limit level can be 0V. When the level of the setting threshold signal is 0V, the RF power amplifier 3 is controlled to stop outputting the RF power amplification signal to the RF device, thereby preventing the RF power amplifier 3 from outputting any signal and ensuring that there is no RF signal output in the RF section of the terminal device without calibration.

[0052] S103. Control whether the RF power amplifier outputs the RF power amplifier signal to the RF device based on the comparison result between the RF power amplifier signal and the set threshold signal.

[0053] Optionally, the RF power amplifier 3 is controlled to output an RF power amplification signal to the RF device based on the comparison result between the RF power amplification signal and the set threshold signal, including: when the level value of the RF power amplification signal is less than or equal to the level value of the set threshold signal, the RF power amplifier 3 is controlled to output an RF power amplification signal to the RF device; when the level value of the RF power amplification signal is greater than the level value of the set threshold signal, the RF power amplifier 3 is controlled to stop outputting an RF power amplification signal to the RF device.

[0054] For example, if the threshold signal level is set to 15V and the RF power amplification signal level is 12V, the power of the RF power amplification signal exceeds the maximum power of the RF device, and the RF power amplifier 3 is controlled to output the RF power amplification signal normally to the RF device. If the threshold signal level is set to 15V and the RF power amplification signal level is 18V, the power of the RF power amplification signal does not exceed the maximum power of the RF device, and the RF power amplifier 3 is controlled to stop outputting the RF power amplification signal to the RF device, thereby preventing the RF device from being burned out. It should be noted that the threshold signal level is set according to the actual usage of the terminal device, and this embodiment does not limit it.

[0055] The radio frequency (RF) power protection method provided in this disclosure includes acquiring the RF power amplification signal output from the RF power amplifier to the RF device; comparing the RF power amplification signal with a set threshold signal; and controlling whether the RF power amplifier outputs the RF power amplification signal to the RF device based on the comparison result. Therefore, this disclosure utilizes the comparison process between the RF power amplification signal and the set threshold signal to control whether the RF power amplifier outputs the RF power amplification signal to the RF device, achieving real-time detection of the RF power amplification signal output from the RF power amplifier to the RF device. When the RF power amplification signal exceeds the set threshold signal, the RF power amplifier can be controlled to stop outputting the RF power amplification signal to the RF device, preventing the RF device from being burned out and improving the security of the terminal device.

[0056] This disclosure also provides an RF power protection circuit, such as Figure 2 As shown, the RF power protection circuit includes: a signal extraction circuit 1 and a comparison circuit 2. The signal extraction circuit 1 is set to the output connection line 100 from the RF power amplifier 3 to the RF device. The comparison circuit 2 is electrically connected to the signal extraction circuit 1 and the RF power amplifier 3 respectively. The signal extraction circuit 1 is used to extract the RF power amplification signal output from the RF power amplifier 3 to the RF device and send it to the comparison circuit 2. The comparison circuit 2 is used to compare the RF power amplification signal with a set threshold signal and control whether the RF power amplifier 3 outputs the RF power amplification signal to the RF device according to the comparison result of the RF power amplification signal and the set threshold signal.

[0057] Specifically, such as Figure 2 As shown, the RF power protection circuit includes a signal extraction circuit 1 and a comparison circuit 2. The signal extraction circuit 1 extracts the RF power amplification signal output from the RF power amplifier 3 to the RF device and inputs it to the comparison circuit 2. The comparison circuit 2 compares the RF power amplification signal with the level value of a set threshold signal. When the level value of the RF power amplification signal is less than the level value of the set threshold signal, the comparison circuit 2 controls the RF power amplifier 3 to work and output the RF power amplification signal to the RF device by adjusting the enable signal output to the RF power amplifier 3. When the level value of the RF power amplification signal is greater than the level value of the set threshold signal, the comparison circuit 2 controls the RF power amplifier 3 to stop working and no longer output the RF power amplification signal to the RF device by adjusting the enable signal output to the RF power amplifier 3, thus preventing the power of the abnormal RF power amplification signal from exceeding the maximum power of the RF device and burning out the RF device.

[0058] Optionally, such as Figure 2As shown, the signal extraction circuit 1 includes: a coupling element 11, the first coupling terminal of the coupling element 11 being electrically connected to the RF power amplifier 3, the second coupling terminal of the coupling element 11 being electrically connected to the RF device, and the third coupling terminal of the coupling element 11 being grounded or grounded through a resistor; and a unidirectional conducting element D1, the anode of the unidirectional conducting element D1 being grounded, and the cathode of the unidirectional conducting element D1 being electrically connected to the fourth coupling terminal of the coupling element 11 and used to output the coupled RF power amplified signal to the comparator circuit 2.

[0059] Specifically, such as Figure 2 As shown, the signal extraction circuit 1 includes a coupling element 11 and a unidirectional conducting element D1. A primary-side coupling coil can be connected between the first coupling end and the second coupling end of the coupling element 11, and a secondary-side coupling coil can be connected between the third coupling end and the fourth coupling end of the coupling element 11. After the coupling element 11 couples and extracts the RF power amplification signal output by the RF power amplifier 3, it outputs the coupled RF power amplification signal to the unidirectional conducting element D1. The unidirectional conducting element D1 can be, for example, a diode. The unidirectional conducting element D1 is used to extract the level of the coupled RF power amplification signal and output it to the comparison circuit 2.

[0060] Optionally, such as Figure 2 As shown, the comparator circuit 2 includes: a comparator, the non-inverting input of the comparator is connected to the RF power amplifier signal, the inverting input of the comparator is connected to the set threshold signal, and the output of the comparator is electrically connected to the enable input EN of the RF power amplifier 3.

[0061] Specifically, such as Figure 2 As shown, when the level of the RF power amplification signal connected to the non-inverting input of the comparator is greater than the level of the set threshold signal connected to the inverting input of the comparator, the output of the comparator outputs a low-level enable signal to the RF power amplifier 3, controlling the RF power amplifier 3 to stop outputting the RF power amplification signal to the RF device; when the level of the RF power amplification signal connected to the non-inverting input of the comparator is less than the level of the set threshold signal connected to the inverting input of the comparator, the output of the comparator outputs a high-level enable signal to the RF power amplifier 3, controlling the RF power amplifier 3 to normally output the RF power amplification signal to the RF device.

[0062] It should be noted that the embodiments disclosed herein do not limit the correspondence between the high and low levels of the enable signal and the operating state of the RF power amplifier 3. Alternatively, the inverting input of the comparator can be connected to the RF power amplifier signal, and the non-inverting input of the comparator can be connected to a set threshold signal, as long as the control logic described in the above embodiments can be implemented.

[0063] Optionally, the RF power protection circuit further includes: an RF transceiver circuit 4, which is electrically connected to the comparator circuit 2, and the RF transceiver circuit 4 is used to output a set threshold signal to the comparator circuit 2.

[0064] Specifically, such as Figure 2 As shown, the RF transceiver circuit 4 is electrically connected to the comparator circuit 2. Before the RF power amplification signal is dynamically calibrated to set the threshold signal, the RF transceiver circuit 4 outputs a threshold signal with a level of, for example, 0V, and the RF power amplifier 3 cannot output an RF power amplification signal to the RF device. During the dynamic calibration of the RF power amplification signal, the RF transceiver circuit 4 receives the RF power amplification signal through its electrical connection with the comparator circuit 2 and dynamically calibrates the threshold signal based on the RF power amplification signal. This ensures that the threshold signal can change according to the changes in the RF power amplification signal, improving the flexibility and protection range of the RF power protection circuit. The specific calibration process can be set up with reference to the above embodiment, and will not be described in detail in this embodiment.

[0065] It should be noted that the radio frequency power protection method described in the above embodiments can be implemented using a radio frequency power protection circuit consisting of a signal extraction circuit, a comparison circuit, and a radio frequency transceiver circuit as the main body.

[0066] This disclosure also provides an radio frequency power protection device. Figure 3 An embodiment of the present disclosure provides an RF power protection device, which includes a signal acquisition module 301, a comparison module 302, and a control module 303. The signal acquisition module 301 is used to acquire the RF power amplification signal output by the RF power amplifier to the RF device; the comparison module 302 is used to compare the RF power amplification signal with a set threshold signal; and the control module 303 is used to control whether the RF power amplifier outputs the RF power amplification signal to the RF device based on the comparison result between the RF power amplification signal and the set threshold signal.

[0067] Optionally, the control module 303 is specifically configured to control the RF power amplifier to output the RF power amplification signal to the RF device when the level value of the RF power amplification signal is less than or equal to the level value of the set threshold signal; and to control the RF power amplifier to stop outputting the RF power amplification signal to the RF device when the level value of the RF power amplification signal is greater than the level value of the set threshold signal.

[0068] Optionally, the radio frequency power protection device may further include a calibration module, which is used to dynamically calibrate the set threshold signal based on the radio frequency power amplification signal before comparing the radio frequency power amplification signal with the set threshold signal; wherein the power value of the set threshold signal is equal to the sum of the power value of the radio frequency power amplification signal and the set calibration power.

[0069] Optionally, the RF power protection device may further include a threshold adjustment module, which is used to adjust the level of the set threshold signal to a set lower limit level before dynamically calibrating the set threshold signal according to the RF power amplification signal, so as to control the RF power amplifier to stop outputting the RF power amplification signal to the RF device.

[0070] The radio frequency (RF) power protection method provided in this disclosure includes acquiring the RF power amplification signal output from the RF power amplifier to the RF device; comparing the RF power amplification signal with a set threshold signal; and controlling whether the RF power amplifier outputs the RF power amplification signal to the RF device based on the comparison result. Therefore, this disclosure utilizes the comparison process between the RF power amplification signal and the set threshold signal to control whether the RF power amplifier outputs the RF power amplification signal to the RF device, achieving real-time detection of the RF power amplification signal output from the RF power amplifier to the RF device. When the RF power amplification signal exceeds the set threshold signal, the RF power amplifier can be controlled to stop outputting the RF power amplification signal to the RF device, preventing the RF device from being burned out and improving the security of the terminal device.

[0071] This disclosure also provides a terminal device. Figure 4 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this disclosure. Figure 4 As shown, the terminal device includes a processor 401 and a memory 402. The processor executes the steps of the radio frequency power protection method as described in the above embodiments by calling the program or instructions stored in the memory. Therefore, it has the beneficial effects of the above embodiments, which will not be repeated here.

[0072] Specifically, such as Figure 4 As shown, a terminal device can be configured to include at least one processor 401, at least one memory 402, and at least one communication interface 403. The various components in the terminal device are coupled together via a bus system 404. The communication interface 403 is used for information transmission with external devices. It is understood that the bus system 404 is used to implement communication between these components. In addition to a data bus, the bus system 404 also includes a power bus, a control bus, and a status signal bus. However, for clarity, in... Figure 4 The general designated all buses as Bus System 404.

[0073] It is understood that the memory 402 in this embodiment may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. In some embodiments, the memory 402 stores elements such as executable units or data structures, or subsets thereof, or extended sets thereof, operating systems, and applications. In embodiments of this disclosure, the processor 401 executes the steps of various embodiments of the radio frequency power protection method provided in this disclosure by calling programs or instructions stored in the memory 402.

[0074] The radio frequency power protection method provided in this disclosure can be applied to, or implemented by, processor 401. Processor 401 can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by integrated logic circuits in the hardware of processor 401 or by instructions in software form. The processor 401 can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The general-purpose processor can be a microprocessor or any conventional processor.

[0075] The steps of the radio frequency power protection method provided in this disclosure can be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software units in the decoding processor. The software units can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory 402, and processor 401 reads the information in memory 402 and combines it with hardware to complete the steps of the method.

[0076] The terminal device may also include one or more physical components to execute instructions generated by the processor 401 when performing the radio frequency power protection method provided in this embodiment. Different physical components may be located within the terminal device or outside the terminal device, such as a cloud server. Each physical component, together with the processor 401 and the memory 402, works to implement the functions of the terminal device in this embodiment.

[0077] This disclosure also provides a terminal device, including the radio frequency power protection circuit as described in the above embodiments, or including a radio frequency power protection device for performing the radio frequency power protection method as described in the above embodiments. Therefore, the terminal device provided in this disclosure has the beneficial effects described in the above embodiments. Furthermore, the terminal device described in this disclosure can be a computer, mobile phone, etc., and this disclosure does not specifically limit it to these.

[0078] This disclosure also provides a storage medium, such as a computer-readable storage medium, which stores a program or instructions that cause a computer to execute a radio frequency power protection method.

[0079] Optionally, when executed by a computer processor, the computer-executable instructions can also be used to execute the technical solution of the radio frequency power protection method provided in any embodiment of this disclosure.

[0080] Based on the above description of the implementation methods, those skilled in the art can clearly understand that this application can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of the various embodiments of this disclosure.

[0081] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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. Furthermore, 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 limitations, 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.

[0082] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A radio frequency power protection method, characterized in that, include: Obtain the RF power amplification signal output from the RF power amplifier to the RF device; The amplified radio frequency power signal is compared with a set threshold signal; The radio frequency power amplifier is controlled to output the radio frequency power amplification signal to the radio frequency device based on the comparison result between the radio frequency power amplification signal and the set threshold signal. Before comparing the amplified radio frequency power signal with the set threshold signal, the method further includes: The set threshold signal is dynamically calibrated based on the radio frequency power amplification signal; wherein the power value of the set threshold signal is equal to the sum of the power value of the radio frequency power amplification signal and the set calibration power. Before dynamically calibrating the set threshold signal based on the radio frequency power amplification signal, the method further includes: Adjust the level of the set threshold signal to the set lower limit level to control the RF power amplifier to stop outputting the RF power amplification signal to the RF device.

2. The radio frequency power protection method according to claim 1, characterized in that, The step of controlling whether the radio frequency power amplifier outputs the radio frequency power amplification signal to the radio frequency device based on the comparison result of the radio frequency power amplification signal and the set threshold signal includes: When the level value of the RF power amplification signal is less than or equal to the level value of the set threshold signal, the RF power amplifier is controlled to output the RF power amplification signal to the RF device; When the level of the RF power amplification signal is greater than the level of the set threshold signal, the RF power amplifier is controlled to stop outputting the RF power amplification signal to the RF device.

3. A radio frequency power protection circuit, characterized in that, include: A signal extraction circuit and a comparison circuit are provided. The signal extraction circuit is configured to correspond to the output connection line from the RF power amplifier to the RF device. The comparison circuit is electrically connected to both the signal extraction circuit and the RF power amplifier. The signal extraction circuit is used to extract the RF power amplification signal output by the RF power amplifier to the RF device and send it to the comparison circuit. The comparison circuit is used to compare the RF power amplification signal with a set threshold signal and control whether the RF power amplifier outputs the RF power amplification signal to the RF device based on the comparison result of the RF power amplification signal and the set threshold signal. Before comparing the radio frequency power amplification signal with the set threshold signal, the method further includes: dynamically calibrating the set threshold signal based on the radio frequency power amplification signal; wherein the power value of the set threshold signal is equal to the sum of the power value of the radio frequency power amplification signal and the set calibration power. Before dynamically calibrating the set threshold signal based on the radio frequency power amplification signal, the method further includes: adjusting the level of the set threshold signal to a set lower limit level to control the radio frequency power amplifier to stop outputting the radio frequency power amplification signal to the radio frequency device.

4. The radio frequency power protection circuit according to claim 3, characterized in that, The signal extraction circuit includes: A coupling element, wherein a first coupling terminal of the coupling element is electrically connected to the radio frequency power amplifier, a second coupling terminal of the coupling element is electrically connected to the radio frequency device, and a third coupling terminal of the coupling element is grounded or grounded through a resistor; A unidirectional conducting element, wherein the anode of the unidirectional conducting element is grounded, and the cathode of the unidirectional conducting element is electrically connected to the fourth coupling terminal of the coupling element and is used to output the coupled radio frequency power amplification signal to the comparator circuit.

5. The radio frequency power protection circuit according to claim 3, characterized in that, The comparison circuit includes: The comparator has its non-inverting input connected to the RF power amplifier signal, its inverting input connected to the set threshold signal, and its output electrically connected to the enable input of the RF power amplifier.

6. The radio frequency power protection circuit according to claim 3, characterized in that, Also includes: The radio frequency transceiver circuit is electrically connected to the comparison circuit, and the radio frequency transceiver circuit is used to output the set threshold signal to the comparison circuit.

7. A radio frequency power protection device, characterized in that, include: The signal acquisition module is used to acquire the RF power amplification signal output from the RF power amplifier to the RF device; The comparison module is used to compare the radio frequency power amplification signal with a set threshold signal; The control module is used to control whether the radio frequency power amplifier outputs the radio frequency power amplification signal to the radio frequency device based on the comparison result between the radio frequency power amplification signal and the set threshold signal; A calibration module is used to dynamically calibrate the set threshold signal based on the radio frequency power amplification signal before comparing the radio frequency power amplification signal with the set threshold signal; wherein the power value of the set threshold signal is equal to the sum of the power value of the radio frequency power amplification signal and the set calibration power. The threshold adjustment module is used to adjust the level of the set threshold signal to a set lower limit level before dynamically calibrating the set threshold signal according to the RF power amplification signal, so as to control the RF power amplifier to stop outputting the RF power amplification signal to the RF device.

8. A terminal device, characterized in that, It includes the radio frequency power protection circuit as described in any one of claims 3-6, or includes a radio frequency power protection device for performing the radio frequency power protection method as described in any one of claims 1-2.

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