A ceramic filter-based electromagnetic protection assembly, method and computer device

Abstract

The application discloses a kind of based on ceramic filter electromagnetic protection assembly, method and computer equipment, belong to electromagnetic compatibility technical field.The assembly includes sequentially electrically connected first discharge network, ceramic filter network, second transient discharge network and residual voltage network.First discharge network is used to preprocess high-frequency interference;Ceramic filter network is used to attenuate the interference signal of preset frequency band;Second transient discharge network is used to suppress transient overvoltage;Residual voltage network is used to filter out residual noise.The application also discloses a kind of electromagnetic interference protection method and computer equipment.The application can comprehensively, efficiently and hierarchically protect high-frequency noise, specific frequency band narrowband interference, transient pulse and low-frequency residual voltage through the cooperative work of multi-level network, significantly improve the reliability and stability of electronic equipment in complex electromagnetic environment, especially suitable for communication, medical and other high-precision electronic equipment.

Description

Technical Field

[0001] This application belongs to the field of electromagnetic compatibility technology, and specifically relates to an electromagnetic protection component, method and computer device based on a ceramic filter. Background Technology

[0002] Electromagnetic interference (EMI) is a common problem faced by electronic devices during operation. It not only affects the normal operation of the device itself, causing signal distortion, data errors, or performance degradation, but can also affect the operation of other surrounding devices through conduction or radiation. As electronic technology develops towards higher frequencies, integration, and higher sensitivity, electromagnetic compatibility (EMC) design has become a critical aspect of ensuring the reliability of electronic systems.

[0003] Currently, filters are commonly used to suppress electromagnetic interference. However, most existing filters have relatively simple design concepts, such as using only LC filters or simple dielectric filters. These single-structure filters often fall short when facing complex and ever-changing electromagnetic environments. Specifically, they struggle to effectively handle multiple types of interference across a wide frequency band simultaneously: on the one hand, their suppression depth for high-frequency noise is limited; on the other hand, they lack rapid discharge and clamping capabilities for transient high-energy pulse interference generated by lightning, electrostatic discharge, etc., easily leading to damage to subsequent sensitive circuits; furthermore, even after interference suppression, a significant low-frequency residual voltage may still exist in the circuit, affecting the stability and accuracy of the equipment. Therefore, how to provide a comprehensive, efficient, and hierarchical protection solution for electromagnetic interference is a pressing technical problem that needs to be solved in this field. Summary of the Invention

[0004] The purpose of this application is to provide an electromagnetic protection component, method, and computer device based on a ceramic filter, in order to solve the technical problems of narrow frequency band coverage, poor transient suppression capability, and incomplete residual voltage processing in existing electromagnetic protection schemes.

[0005] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, an electromagnetic protection component based on a ceramic filter is provided, comprising the following components electrically connected in sequence: The primary discharge network is used to preprocess high-frequency interference in the input signal; A ceramic filter network is connected to the output of the first-stage discharge network and is used to attenuate interference signals in a preset frequency band. A secondary transient discharge network, connected to the output of the ceramic filter network, is used to suppress transient overvoltage; and The residual voltage network, connected to the output of the secondary transient discharge network, is used to filter out residual noise and output a protected signal.

[0006] In one possible implementation, the ceramic filter network is a high-Q multi-cavity ceramic filter network, which includes multiple ceramic resonant cavities connected in series or in parallel, each of the ceramic resonant cavities having a different resonant frequency; each of the ceramic resonant cavities is made of a ceramic material with high dielectric constant and low loss.

[0007] In one possible implementation, the secondary transient discharge network includes at least one transient voltage suppression diode connected in parallel between the signal line and the reference ground.

[0008] In one possible implementation, the residual voltage network includes a capacitor, or an LC filter circuit consisting of an inductor and a capacitor.

[0009] In one possible implementation, the primary discharge network is a high-pass filter structure or a low-pass filter structure, and its operating frequency band is higher or lower than the filtering frequency band of the ceramic filter network.

[0010] In one possible implementation, the primary discharge network, ceramic filter network, secondary transient discharge network, and residual voltage network are integrated within the same shielding housing.

[0011] Secondly, an electromagnetic interference protection method is provided, including: The input signal undergoes high-frequency interference preprocessing via a primary bleedering network. The preprocessed signal is input into a ceramic filter network to attenuate interference signals in a preset frequency band. The filtered signal is input into a two-stage transient discharge network to suppress transient overvoltage; The transient-suppressed signal is input into the residual voltage network to filter out residual noise and output a clean signal.

[0012] In one possible implementation, the ceramic filter network is a high-Q multi-cavity ceramic filter network, which selectively attenuates interference signals in multiple preset frequency bands through multiple ceramic resonant cavities with different resonant frequencies.

[0013] Thirdly, a computer device is provided, comprising: a processor and a computer-readable storage medium; the processor being adapted to execute a computer program; the computer-readable storage medium storing the computer program, wherein when the computer program is executed by the processor, it implements the electromagnetic interference protection method as described in the second aspect.

[0014] Compared with the prior art, this application has the following beneficial effects: An electromagnetic protection component based on ceramic filters achieves coordinated protection against electromagnetic interference by constructing a hierarchical structure consisting of a primary discharge network, a ceramic filter network, a secondary transient discharge network, and a residual voltage network, thus solving the problem of single-dimensional protection in existing technologies. The primary discharge network pre-processes high-frequency interference, significantly reducing the processing burden of subsequent networks; the ceramic filter network precisely attenuates interference in specific preset frequency bands; the secondary transient discharge network quickly suppresses transient overvoltages; and the residual voltage network thoroughly filters out residual low-frequency noise. The four-level network works in harmony to provide comprehensive and efficient protection against all types of high-frequency noise, narrowband interference in specific frequency bands, transient pulses, and low-frequency residual voltages, significantly improving the reliability of electronic equipment in complex electromagnetic environments.

[0015] In one possible implementation, the high frequency selectivity of high-Q ceramic materials is utilized to selectively and deeply attenuate interference signals in multiple preset frequency bands through multiple ceramic resonant cavities with different resonant frequencies. This achieves excellent out-of-band suppression capability, meeting the stringent suppression requirements of high-precision electronic equipment in communication, medical, and other fields for interference in specific frequency bands. Simultaneously, the high dielectric constant and low loss of the ceramic material enable the resonant cavity to acquire high Q-value characteristics, further improving the frequency selectivity and suppression depth of the filter network, while reducing insertion loss and ensuring the normal transmission of effective signals.

[0016] In one possible implementation, the picosecond or nanosecond response characteristics of the transient voltage suppression diode are utilized to quickly conduct and discharge energy when a transient overvoltage occurs, clamping the signal line voltage to a safe range and effectively preventing damage to subsequent sensitive circuits from transient high-energy pulse interference such as lightning and electrostatic discharge.

[0017] In one possible implementation, the picosecond or nanosecond response characteristics of a TVS diode can be utilized to quickly conduct and discharge energy when a transient overvoltage occurs, clamping the voltage to a safe range and effectively preventing damage to downstream sensitive circuits from transient interferences such as lightning and electrostatic discharge.

[0018] In one possible implementation, a capacitor or LC filter circuit is used to specifically filter out residual low-frequency noise and DC ripple after the pre-processing stage, ensuring the purity of the output signal. This solves the problem of incomplete residual voltage processing in existing technologies and meets the stringent requirements of high-precision analog circuits or high-speed digital circuits for low noise and low ripple.

[0019] In one possible implementation, by designing its operating frequency band to be complementary to or offset from the filtering frequency band of the ceramic filter network, high-frequency interference can be effectively discharged while avoiding attenuation of useful signals, thus optimizing the overall protection performance and signal transmission efficiency of the component.

[0020] In one possible implementation, the four-level network is integrated into the same shielded housing to form a modular electromagnetic protection device. This not only improves the integration of components and facilitates installation and application in miniaturized electronic devices, but also prevents external electromagnetic radiation intrusion and internal signal radiation through the shielded housing, further enhancing the overall electromagnetic protection effect.

[0021] An electromagnetic interference protection method achieves full-process hierarchical protection of input signals through four sequentially executed steps: high-frequency preprocessing, preset frequency band attenuation, transient overvoltage suppression, and residual noise filtering. This method corresponds one-to-one with the aforementioned components, comprehensively processing high-frequency noise, narrowband interference in specific frequency bands, transient pulses, and low-frequency residual voltage, ultimately outputting a clean signal and effectively ensuring the stable operation of electronic equipment in complex electromagnetic environments.

[0022] A computer device executes a computer program stored in a storage medium via a processor to implement the aforementioned electromagnetic interference protection method. This device implementation allows the technical solution of this application to be embedded in scenarios such as intelligent power management and adaptive filtering systems, achieving software-configurable electromagnetic protection functions and expanding the application scope and implementation forms of the technical solution. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an electromagnetic protection component based on a ceramic filter, provided for an embodiment of this application. It shows the sequential electrical connection relationship of each functional network in the component and the overall signal transmission flow. Figure 2 This is a schematic diagram of a high-Q multi-cavity ceramic filter network provided in an embodiment of this application, showing the arrangement of the ceramic resonant cavities and the resonant frequency ranges corresponding to different cavities; Figure 3 A schematic diagram of a primary discharge network provided in this application embodiment shows the component composition, connection relationship and high-frequency interference discharge path of the discharge network; Figure 4 A schematic diagram of a two-stage transient discharge network provided for an embodiment of this application shows the connection method of the transient suppression device and the discharge path of the transient signal; Figure 5 This is a schematic diagram of the circuit structure of a residual voltage network provided in an embodiment of this application, showing the composition, connection relationship, and low-frequency residual voltage filtering path of the residual voltage filtering device. Detailed Implementation

[0024] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0025] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] Example 1: This embodiment discloses a hardware structure for an electromagnetic protection component adapted to the radio frequency signal end of a communication base station. The component is designed for the 800MHz-2.6GHz operating frequency band of the communication base station, and meets the high reliability and high signal fidelity requirements of the base station's radio frequency signal for electromagnetic interference protection. It can effectively suppress various electromagnetic interferences encountered by the base station during operation, such as high-frequency noise, specific frequency band interference, lightning / static transient pulses, and low-frequency residual voltage.

[0031] like Figure 1-5 As shown, the electromagnetic protection component includes a primary discharge network, a ceramic filter network, a secondary transient discharge network, and a residual voltage network that are connected in sequence. The input end of the component is connected to the radio frequency signal source of the communication base station, and the output end is connected to the radio frequency receiving module of the base station. The radio frequency signal is transmitted along the path of the primary discharge network, the ceramic filter network, the secondary transient discharge network, and the residual voltage network to complete the entire process of electromagnetic interference protection.

[0032] Among them, the ceramic filter network is the core filtering module of the component, and it adopts a high-Q multi-cavity ceramic filter network structure; such as Figure 2 As shown, it includes three ceramic resonant cavities connected in series, such as cavity 1, cavity 2 and cavity 3. Each ceramic resonant cavity has a different resonant frequency, which is precisely matched to the three interference frequency bands commonly used by communication base stations: 1.2GHz, 1.8GHz and 2.4GHz, to achieve selective deep attenuation of target interference.

[0033] The specific design and working principle of each functional network: Primary discharge network: discharges high-frequency noise interference above 5GHz, performs high-frequency preprocessing on the input RF signal, and prevents high-frequency noise from entering the subsequent ceramic filter network and causing processing burden.

[0034] Structure: It adopts an RC low-pass filter structure, which consists of a surface mount resistor R1 (50Ω) and a surface mount capacitor C1 (10pF); wherein the resistor R1 is connected in series in the RF signal path, and the capacitor C1 is connected in parallel between the output terminal of the resistor R1 and the reference ground.

[0035] Working principle: The cutoff frequency of this RC low-pass filter structure is designed to be 3GHz, which is higher than the 800MHz-2.6GHz operating frequency band of ceramic filter networks. It has no attenuation effect on the effective radio frequency signal of the base station. High-frequency noise above 5GHz can be quickly discharged to the reference ground through capacitor C1, completing the pre-filtering of high-frequency interference and ensuring that the subsequent network only processes interference within the effective frequency band.

[0036] Ceramic filter network: It selectively and deeply attenuates the common interference frequency bands of three communication base stations, namely 1.2GHz, 1.8GHz, and 2.4GHz, and is the core module of the component to achieve interference suppression in specific frequency bands.

[0037] Structure: It includes three ceramic resonant cavities connected in series. All cavities are made of ceramic materials with high dielectric constant and low loss, achieving high resonance characteristics with a Q value ≥ 2000. The resonant frequencies of the three cavities are precisely matched to 1.2 GHz, 1.8 GHz, and 2.4 GHz, respectively.

[0038] Working principle: When the pre-processed RF signal passes through the ceramic filter network, the interference signal that matches the frequency of the resonant cavity will resonate in the cavity and be rapidly attenuated, achieving a suppression depth of ≥60dB for the three target interference frequency bands; while the effective RF signal in the range of 800MHz-2.6GHz can pass through without loss, taking into account both the interference suppression effect and the transmission fidelity of the effective signal.

[0039] Secondary transient discharge network: suppresses transient overvoltage / pulse interference caused by electrostatic discharge and lightning induction, and prevents transient high-energy pulses from damaging the sensitive circuits of the downstream base station RF receiver module.

[0040] Structure: It includes two bidirectional transient voltage suppressor diodes (TVS) in parallel, TVS1 and TVS2, both of which are connected in parallel between the radio frequency signal line and the reference ground.

[0041] Working principle: Utilizing the picosecond-level response characteristics of TVS diodes (response time ≤ 500ps), when a transient overvoltage occurs in the line, TVS1 and TVS2 instantly change from a high-impedance state to a low-impedance state, quickly dissipating the energy of the transient overvoltage to the reference ground and clamping the voltage of the RF signal line to a safe range; when the transient overvoltage disappears, the TVS diodes quickly return to the high-impedance state, without affecting the normal transmission of the RF signal.

[0042] Residual voltage network: Filters out residual low-frequency noise (≤100kHz) and DC ripple after pre-processing, and outputs a clean and stable RF signal to the base station RF receiver module.

[0043] Structure: It adopts an LC low-frequency filter structure, which consists of a surface mount inductor L1 (inductance value 1μH) and a surface mount capacitor C2 (capacitance value 100nF); wherein the inductor L1 is connected in series in the RF signal path, and the capacitor C2 is connected in parallel between the output terminal of the inductor L1 and the reference ground.

[0044] Working principle: For residual low-frequency noise and DC ripple of ≤100kHz, inductor L1 exhibits high impedance characteristics and capacitor C2 exhibits low impedance characteristics. Low-frequency noise can be discharged to the reference ground through capacitor C2, while the effective radio frequency signal can pass smoothly through inductor L1. After processing by this network, the low-frequency residual voltage ripple of the output radio frequency signal is ≤50mV, which meets the low noise requirements of the base station radio frequency receiver module.

[0045] In this embodiment, all components of the primary discharge network, ceramic filter network, secondary transient discharge network, and residual voltage network are soldered onto a ceramic substrate and integrated and packaged within the same aluminum alloy shielding housing, with the surface of the shielding housing grounded. This design improves the integration of the components, forming modular devices that are easy to install and replace in miniaturized communication base station equipment. Furthermore, the shielding housing effectively blocks external electromagnetic radiation from entering the components, while preventing signal radiation from within the components from interfering with surrounding circuits, further enhancing electromagnetic protection.

[0046] Example 2: This embodiment discloses a hardware structure for an electromagnetic protection component adapted to the signal end of medical testing equipment (such as biochemical analyzers and ultrasound diagnostic instruments). Medical testing equipment has much higher requirements for signal stability and low noise than ordinary electronic equipment, and there are various electromagnetic interference sources in the working environment, such as medical instruments and power supply lines. This component is designed for the 0-1GHz working frequency band of medical testing equipment to achieve efficient protection against various electromagnetic interferences and ensure the accuracy of test data.

[0047] Consistent with Example 1, the component includes a primary discharge network, a ceramic filter network, a secondary transient discharge network, and a residual voltage network connected in sequence. The input end is connected to the signal acquisition end of the medical testing equipment, and the output end is connected to the signal processing module of the equipment. The ceramic filter network is a high-Q multi-cavity ceramic filter network, which includes two parallel ceramic resonant cavities with resonant frequencies that match the 2.4GHz wireless interference and 50Hz power frequency interference commonly found in medical environments.

[0048] The primary discharge network adopts an RC low-pass filter structure with a cutoff frequency of 1.2GHz, which is higher than the 0-1GHz operating frequency band of medical testing equipment. It consists of a chip resistor R2 (20Ω) and a chip capacitor C3 (22pF) to discharge high-frequency noise above 1.2GHz, avoiding high-frequency interference from affecting the accuracy of the detection signal.

[0049] The ceramic filter network consists of two parallel ceramic resonant cavities with resonant frequencies of 2.4 GHz and 50 Hz, respectively, achieving deep attenuation of wireless clutter and power frequency interference with a suppression depth of ≥55 dB, ensuring distortion-free transmission of detection signals in the 0-1 GHz range.

[0050] The secondary transient discharge network includes a unidirectional transient voltage suppressor diode (TVS3) and a varistor (RV1), which are connected in series and then in parallel between the signal line and the reference ground. The TVS3 achieves nanosecond-level transient overvoltage clamping, and the varistor (RV1) assists in discharging high-energy transient pulses. It is suitable for strong transient interference coupled to the power supply lines of medical equipment and effectively protects the signal processing chip of the equipment.

[0051] The residual voltage network adopts a dual LC filter structure, consisting of surface mount inductors L2 (2.2μH) and L3 (2.2μH) and surface mount capacitors C4 (220nF) and C5 (220nF), to filter out residual low-frequency noise ≤50kHz. The output signal ripple is ≤30mV, meeting the stringent requirements of medical testing equipment for low noise and high stability of signals.

[0052] Consistent with Example 1, the four-level network is integrated into an aluminum alloy shielded housing, which is grounded; at the same time, the ceramic substrate adopts a high-temperature resistant and corrosion-resistant packaging process to adapt to the complex working environment of the hospital and improve the service life and reliability of the components.

[0053] Example 3: This embodiment, based on the electromagnetic protection component of the communication base station radio frequency signal terminal in Embodiment 1, discloses the specific execution process of the electromagnetic interference protection method. This method corresponds one-to-one with the hardware structure of the electromagnetic protection component, achieving full-process hierarchical electromagnetic interference protection for input signals, such as... Figure 3 As shown, the specific steps include: S1: High-frequency interference preprocessing steps The radio frequency input signal of the communication base station undergoes high-frequency interference preprocessing via a primary bleeder network. Specifically, the RC low-pass filter structure in the primary bleeder network utilizes the capacitor's high-frequency pass and low-frequency block characteristics to rapidly discharge high-frequency noise components above 5GHz (within the 3GHz cutoff frequency) to the reference ground, completing high-frequency pre-filtering. The preprocessed signal retains only the effective frequency band signal of 800MHz-2.6GHz before entering the subsequent ceramic filter network.

[0054] S2: Preset frequency band interference attenuation steps The preprocessed signal is input into a ceramic filter network to selectively attenuate the preset 1.2GHz, 1.8GHz, and 2.4GHz interference frequency bands. In this step, the ceramic filter network is a high-Q multi-cavity ceramic filter network. Three ceramic resonant cavities with different resonant frequencies resonate with the three target interference frequency bands respectively, achieving deep notch filtering of the target interference frequency bands ≥60dB. After this step, only the effective radio frequency signal is retained in the signal; a small amount of interference signal that is not completely attenuated enters the subsequent secondary transient discharge network along with the effective signal.

[0055] S3: Transient overvoltage suppression steps The filtered signal is input into a two-stage transient discharge network to suppress transient overvoltage. When transient overvoltage / pulse interference caused by electrostatic discharge, lightning induction, etc. occurs in the line, the bidirectional TVS diode in the two-stage transient discharge network quickly changes from a high-impedance state to a low-impedance state, instantly dissipating the energy of the transient overvoltage to the reference ground, while clamping the signal line voltage to a safe range. If the transient overvoltage disappears, the TVS diode quickly returns to the high-impedance state, and the effective RF signal passes through this network without loss, entering the subsequent residual voltage network.

[0056] S4: Residual noise filtering steps The transient-suppressed signal is input into a residual voltage network to filter out residual noise, and a clean signal is output to the base station RF receiver module. Specifically, through the LC low-frequency filter structure in the residual voltage network, the complementary characteristics of inductors passing low frequencies and blocking high frequencies, and capacitors passing high frequencies and blocking low frequencies, are utilized to filter out residual low-frequency noise and DC ripple in the signal. The final output RF signal has a low-frequency residual voltage ripple of ≤50mV, which is a clean, stable, and effective signal, achieving full-process protection against electromagnetic interference.

[0057] Each step of this method is executed sequentially, with the processing result of the previous step serving as the input basis for the next step. The four-level processing steps form an organic whole, achieving full-type electromagnetic interference protection against high-frequency noise, narrowband interference in specific frequency bands, transient pulses, and low-frequency residual voltage. Furthermore, the processing parameters of each step can be flexibly adjusted according to the operating frequency band and protection requirements of electronic equipment, making it suitable for electronic equipment in different fields such as communication and medical.

[0058] Example 4: In one embodiment, a computer device is provided, such as Figure 4 As shown, the computer device includes a processor, memory, network interface, display, and input device connected via a system bus.

[0059] Processor: It provides computing and control capabilities and is the core of computer equipment. It can be implemented using general-purpose CPUs, microprocessors, application-specific integrated circuits (ASICs), etc. Memory: includes non-volatile storage media and internal memory. Non-volatile storage media stores the operating system and computer programs, while internal memory provides the environment for the operation of the operating system and computer programs in the non-volatile storage media. Network interface: Used to communicate with external electronic devices and servers via network connection to enable remote configuration and adjustment of protection parameters; Display: Used to show information such as the working status of electromagnetic protection, interference signal strength, and filtering parameters; Input device: can be keyboard, touchpad, mouse, etc., used for manually configuring protection parameters such as filter frequency band, cutoff frequency, clamping voltage.

[0060] When the computer program is executed by the processor, it implements the electromagnetic interference protection method in Embodiment 3 above. By executing the computer program, the processor can configure the operating parameters of each network of the electromagnetic protection component in software, such as adjusting the cutoff frequency of the primary discharge network, the target interference frequency band of the ceramic filter network, and the filtering threshold of the residual voltage network, so as to realize the software-configurable electromagnetic protection function.

[0061] Those skilled in the art will understand that Figure 4 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0062] Example 5: In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When executed by a processor, the computer program implements the electromagnetic interference protection method of Embodiment 3 described above. The computer-readable storage medium can be any available medium accessible to a computer, or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (such as a floppy disk, hard disk, or magnetic tape), an optical medium (such as a DVD), a semiconductor medium (such as a solid-state drive, SSD), etc. The storage medium can be used to store the computer program, including various instructions, to cause the processor to execute the electromagnetic interference protection method of this application embodiment.

[0063] Example 6: In one embodiment, a computer program product is provided, comprising a computer program that, when executed by a processor, implements the electromagnetic interference protection method described in Embodiment 3. The computer program product can be a removable storage medium such as a USB flash drive, external hard drive, optical disc, or memory card, or it can be an online program package on a server. By installing this computer program product onto a computer device, the processor executes the computer program therein, thereby achieving software-configured electromagnetic interference protection and expanding the application forms of the technical solution of this application.

[0064] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on its differences from other embodiments. In particular, the device, medium, and program product embodiments are basically similar to the method embodiments, so the descriptions are relatively simple; relevant parts can be referred to the descriptions in the method embodiments. It should be noted that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An electromagnetic protection component based on a ceramic filter, characterized in that, Including those connected in sequence: The primary discharge network is used to preprocess high-frequency interference in the input signal; A ceramic filter network is connected to the output of the first-stage discharge network and is used to attenuate interference signals in a preset frequency band. A secondary transient discharge network is connected to the output of the ceramic filter network to suppress transient overvoltage. as well as The residual voltage network, connected to the output of the secondary transient discharge network, is used to filter out residual noise and output a protected signal.

2. The electromagnetic protection component according to claim 1, characterized in that, The ceramic filter network is a high-Q multi-cavity ceramic filter network, which includes multiple ceramic resonant cavities connected in series or in parallel, each of which has a different resonant frequency.

3. The electromagnetic protection component according to claim 2, characterized in that, Each of the ceramic resonant cavities is made of a ceramic material with a high dielectric constant and low loss.

4. The electromagnetic protection component according to claim 1, characterized in that, The secondary transient discharge network includes at least one transient voltage suppression diode connected in parallel between the signal line and the reference ground.

5. The electromagnetic protection component according to claim 1, characterized in that, The residual voltage network includes a capacitor, or an LC filter circuit composed of an inductor and a capacitor.

6. The electromagnetic protection component according to claim 1, characterized in that, The primary discharge network is a high-pass filter structure or a low-pass filter structure, and its operating frequency band is higher or lower than the filtering frequency band of the ceramic filter network.

7. An electromagnetic interference protection method, characterized in that, include: The input signal undergoes high-frequency interference preprocessing via a primary bleedering network. The preprocessed signal is input into a ceramic filter network to attenuate interference signals in a preset frequency band. The filtered signal is input into a two-stage transient discharge network to suppress transient overvoltage; The transient-suppressed signal is input into the residual voltage network to filter out residual noise and output a clean signal.

8. The method according to claim 7, characterized in that, The ceramic filter network is a high-Q multi-cavity ceramic filter network, which selectively attenuates interference signals in multiple preset frequency bands through multiple ceramic resonant cavities with different resonant frequencies.

9. The electromagnetic protection component according to any one of claims 1 to 6, characterized in that, The primary discharge network, ceramic filter network, secondary transient discharge network, and residual voltage network are integrated within the same shielding housing.

10. A computer device, characterized in that, include: Processor and computer-readable storage media; The processor is adapted to execute computer programs; The computer-readable storage medium stores a computer program, which, when executed by the processor, implements the electromagnetic interference protection method as described in claim 7 or 8.

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