Filtering assembly and antenna filtering system

Abstract

The utility model provides a filtering assembly and an antenna filtering system, and the filtering assembly comprises a switch assembly which is provided with an input end and a plurality of output ends, and the input end is used for being electrically connected with a main link of a multi-band radio frequency communication system; the filter assembly is provided with a plurality of filters, and each filter is electrically connected with one output end; the processor is in signal connection with the switch assembly; the processor can control the switch assembly to select one to open the output end based on the currently processed frequency band information.

Description

Technical Field

[0001] The present application relates to the field of filtering technology, and in particular to a filtering component and an antenna filtering system. Background Art

[0002] Multi-band RF communication systems can receive and transmit signals across multiple frequency bands, achieving broad coverage. To ensure signal quality in each frequency band, appropriate filters are typically installed in each frequency sub-link of a multi-band RF communication system. However, when operating in frequency bands with interference, these filters cannot effectively suppress interference, impacting antenna performance. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a filtering component and an antenna filtering system.

[0004] To solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0005] In a first aspect, the present application provides a filter assembly, comprising:

[0006] a switch assembly having an input end and a plurality of output ends, wherein the input end is used to electrically connect to a main link of a multi-band radio frequency communication system;

[0007] A filter assembly, wherein the filter assembly comprises a plurality of filters, each of the filters being electrically connected to one of the output terminals;

[0008] A processor is signal-connected to the switch component; the processor can control the switch component to selectively open one of the output ends based on the currently processed frequency band information.

[0009] In some modified implementations of the first aspect of the present application, the filter assembly has multiple filters including at least one of the following combinations:

[0010] The plurality of filters process signals in different ways;

[0011] The filtering characteristics of the plurality of filters are different;

[0012] The multiple filters process different frequency ranges.

[0013] In some embodiments, the filter assembly includes at least one band filter and / or at least one notch filter.

[0014] In some embodiments, one of the output terminals is connected to a matching capacitor; and / or one of the output terminals is in an open circuit state.

[0015] In some embodiments, the switch assembly includes a single-pole multi-throw switch having the input terminal and a plurality of the output terminals.

[0016] In some embodiments, it further includes:

[0017] A substrate, wherein the switch component and the filter component are both arranged on the substrate.

[0018] A second aspect of the present application provides an antenna filtering system, comprising:

[0019] A multi-band radio frequency communication system having a main link;

[0020] Filter components, including:

[0021] a switch assembly having an input end and a plurality of output ends, wherein the input end is used to be electrically connected to the main link;

[0022] A filter assembly, wherein the filter assembly comprises a plurality of filters, each of the filters being electrically connected to one of the output terminals;

[0023] A processor is signal-connected to the switch component; the processor can control the switch component to selectively open one of the output ends based on the currently processed frequency band information.

[0024] In some embodiments, it further includes:

[0025] A nonlinear device is provided between the signal input end of the main link and the filter component, and the nonlinear device is electrically connected to the main link.

[0026] In some embodiments, the nonlinear device comprises:

[0027] A radio frequency test socket, electrically connected to the main link;

[0028] The frequency modulator is arranged between the radio frequency test socket and the filter component, and the frequency modulator is electrically connected to the main link.

[0029] In some embodiments, the multi-band radio frequency communication system has multiple sub-links, each of which is used to transmit signals in different frequency bands; each of the filters is used to process a signal of at least one of the sub-links. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0031] Figure 1 The structure diagram of an embodiment of the filter assembly of the present application is schematically shown;

[0032] Figure 2 The figure schematically shows a structural diagram of one embodiment of the filter component of the present application.

[0033] Description of Figure Numbers:

[0034] 1. Switch component; 2. Filter component; 21. Notch filter; 22. Band filter for processing B13 frequency band; 23. Band filter for processing B14 frequency band; 3. Processor; 4. Matching capacitor; 5. Substrate; 6. Multi-band RF communication system; 61. Main link; 62. Sub-link; 63. Port switch; 64. Medium and high frequency input module; 65. Low, medium and high input and output module; 7. Nonlinear device; 71. RF test socket; 72. Frequency modulator. DETAILED DESCRIPTION

[0035] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0036] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this application belongs.

[0037] Example 1

[0038] like Figure 1 and Figure 2 As shown, embodiment 1 of the present application provides a filter component, including:

[0039] The switch assembly 1 has an input terminal and a plurality of output terminals, wherein the input terminal is used to electrically connect to the main link 61 of the multi-band radio frequency communication system 6;

[0040] The filter assembly 2 includes a plurality of filters, each of which is electrically connected to an output terminal;

[0041] Processor 3 is signal-connected to switch component 1; processor 3 can control switch component 1 to selectively open one output terminal based on the currently processed frequency band information.

[0042] Because the multi-band RF communication system 6 can operate in multiple different frequency bands, the switch assembly 1 can selectively activate a specific output port and select a corresponding filter to process signals in a specific frequency band based on the currently processed frequency band information. The switch assembly 1 is configured with a control interface circuit or a state feedback circuit to connect to the processor 3 via wireless signals (such as wireless networks or Bluetooth) or wired signals (such as data cables or coaxial cables). The switch assembly 1 can use a matrix switch with an RF coaxial connector interface; alternatively, the switch assembly 1 can use a matrix switch with a waveguide interface.

[0043] The multiple filters in the filter assembly can be set to correspond to different frequency bands to process the signals of the corresponding frequency bands to improve communication quality and efficiency. Each output end of the switch assembly 1 is connected to a filter to achieve a compact layout and integrated design, and to achieve efficient signal switching and filtering functions in a limited space. The number of filters can be the same as the number of frequency bands processed by the multi-band radio frequency communication system 6. In this case, the filters correspond to the frequency bands one by one, and each filter is used to process the signals of a frequency band, ensuring that the signals of each frequency band of the multi-band radio frequency communication system 6 undergo specialized filtering processing, thereby effectively ensuring the quality of the signals of each frequency band and minimizing the interference between different frequency bands and the impact of external interference on the signals. Alternatively, the number of filters can be less than the number of frequency bands processed by the multi-band radio frequency communication system. In this case, corresponding filters can be set for certain specific frequency bands in the multi-band radio frequency communication system 6. The number of filters can be less than the number of frequency bands processed by the multi-band radio frequency communication system 6. In this case, corresponding filters are set for certain frequency bands with greater interference in the multi-band radio frequency communication system 6. For example, the GPS system and the B13 frequency band are prone to mutual interference. Corresponding filters can be set for the GPS and B13 frequency bands to reduce interference between the two and ensure stable transmission and accurate reception of signals in each frequency band within its specific frequency band. Similarly, for the B14 frequency band, which may interfere with the GPS frequency band, corresponding filters can also be set to reduce the impact of interference, ensuring the quality of signals in each frequency band and the normal operation of the system. When the currently processed frequency band does not require filter processing, the processor 3 can send a control signal to control the shutdown of the switch component 1.

[0044] Processor 3 is signal-connected to multi-band RF communication system 6. For example, processor 3 can be signal-connected to an antenna controller or frequency band detection unit of multi-band RF communication system 6. Processor 3 can be wired to multi-band RF communication system 6, for example, via an interface or signal line; or processor 3 can be wirelessly connected to multi-band RF communication system 6, for example, via a wireless network or Bluetooth connection. Processor 3 can obtain frequency band information currently being processed by multi-band RF communication system 6 and convert this currently processed frequency band information into a control signal to control the activation of the output terminal connected to the filter corresponding to the currently processed frequency band information.

[0045] The filter component provided in Example 1 of the present application has a switch component 1 with multiple output terminals, and a filter component 2 with multiple filters, each of which is connected to a filter. This enables the switch component 1 and the filter component 2 to achieve a compact layout and integrated design, thereby realizing efficient signal switching and filtering functions within a limited space. The processor 3 controls the switch component 1 according to the currently processed frequency band information, and directs the main link 61 signal of the multi-band radio frequency communication system 6 to a suitable filter, thereby effectively removing interference signals and significantly improving signal quality and stability.

[0046] like Figure 1 and Figure 2 As shown, in some embodiments, the filter assembly 2 has multiple filters including at least one of the following combinations:

[0047] Multiple filters process signals differently;

[0048] The filtering characteristics of multiple filters are different;

[0049] Multiple filters process different frequency ranges.

[0050] Different signal processing methods can meet the specific signal requirements of different application scenarios. For example, low-pass filtering allows signals below a certain frequency to pass through, while significantly attenuating signals above this frequency. This can be used in audio processing to remove high-frequency noise and make the sound more mellow. High-pass filtering allows signals above a certain frequency to pass through, while attenuating signals below this frequency. In some image enhancement applications, high-pass filters can highlight image edges and details while removing low-frequency background information. Bandpass filtering allows signals within a specific frequency range to pass through, while attenuating signals outside this range. In radio communications, specific frequency bands are selected for signal reception to eliminate interference from other frequency bands.

[0051] Different filtering characteristics are used to adapt to different signal characteristics and interference situations. For example, the cutoff characteristic, where the signal changes very rapidly at the frequency boundary between passing and being cut off, can more accurately select signals within a specific frequency range and reduce interference from adjacent frequency bands. In high-precision communication systems, this can ensure signal purity. The passband characteristic, where the amplitude of the signal changes very little after passing through the filter, can maintain the same amplitude of the sound signal within a specific frequency range in audio signal processing. The linear phase characteristic, where the time delay of signals of different frequencies is linearly related to the frequency after passing through the filter, can keep the signal waveform undistorted in digital signal processing and communication systems.

[0052] By configuring filters that process different frequency ranges, the multi-band RF communication system 6 can meet its requirements for processing signals in different frequency bands. For example, filters designed specifically for the low-frequency range can be used to process low-frequency, medium-frequency, and high-frequency signals, respectively, ensuring efficient transmission and processing of signals in different frequency ranges.

[0053] like Figure 1 and Figure 2 As shown, in some embodiments, the filter assembly 2 includes at least one band filter and / or at least one notch filter 21 .

[0054] Band filters allow signals within a specific frequency range to pass while suppressing signals outside that range. For example, to ensure the accuracy of GPS signals, filter assembly 2 may include a band filter 22 that processes the B13 frequency band and / or a band filter 23 that processes the B14 frequency band. Notch filter 21 can suppress signals of specific frequencies while allowing signals of other frequencies to pass. For example, in an audio processing system, to eliminate 50-60 Hz power line interference, a notch filter 21 that processes 50-60 Hz frequencies may be implemented to ensure the clarity and quality of the audio signal.

[0055] like Figure 1 and Figure 2 As shown, in some embodiments, an output terminal can be connected to a matching capacitor 4; the impedance value of each frequency band that does not require filter processing can be calculated using electromagnetic formulas. When the frequency band currently being processed does not require filter processing and the impedance value is large, the processor 3 can send a control signal to turn on the output terminal connected to the matching capacitor 4, and adjust the impedance of the main link 61 when operating in this frequency band through the matching capacitor 4, thereby reducing signal reflection and improving power transmission efficiency. The matching capacitor 4 can be selected in the range of 0.5-1pF, for example, a matching capacitor 4 of 0.5pF or a matching capacitor 4 of 1pF can be selected.

[0056] To reduce wear and tear on the switch assembly 1 caused by frequent opening and closing, one output terminal can be in an open-circuit state. When the frequency band currently being processed does not require filter processing, the processor 3 can send a control signal to control the open-circuit output terminal to extend the service life of the switch assembly 1.

[0057] The matching capacitor 4 and the open circuit state can be used alone or in combination according to actual conditions to improve the performance and reliability of the filter component.

[0058] like Figure 1 and Figure 2 As shown, in some embodiments, the switch assembly 1 includes a single-pole multi-throw switch having an input terminal and multiple output terminals.

[0059] Switch component 1 can be a single-pole double-throw (SPDT) switch or a single-pole four-throw (SP4T) switch. Due to operationally clear testing standards for GPS signals, and to ensure GPS signal accuracy and reliability, when SPDT is used, the two output terminals can be connected to a band filter 22 for processing the B13 frequency band and a band filter 23 for processing the B14 frequency band, respectively. When SP4T is used, the first output terminal can be connected to the band filter 22 for processing the B13 frequency band; the second output terminal can be connected to the band filter 23 for processing the B14 frequency band. The third output terminal can be connected to a notch filter 21 for processing other specific frequency bands. The fourth output terminal can be connected to a matching capacitor 4 or left open-circuited. Alternatively, the third output terminal can be connected to a matching capacitor 4, and the fourth output terminal can be left open-circuited.

[0060] like Figure 1 and Figure 2 As shown, in some embodiments, it also includes:

[0061] The substrate 5 , the switch component 1 and the filter component 2 are all arranged on the substrate 5 .

[0062] The switch assembly 1 can be mounted on the substrate 5 using surface mount technology; alternatively, the switch assembly 1 can be connected by inserting pins into jacks on the substrate 5. The pins of the multiple filters in the filter assembly 2 can be connected to the substrate 5 by welding or conductive adhesive. The processor 3 can be connected to the substrate 5 using surface mount technology or conductive adhesive. Placing the switch assembly 1, filter assembly 2, and processor 3 on the substrate 5 reduces the complexity of external connections and wiring, making the entire system more compact. This not only saves space, but also helps improve system reliability and reduce signal loss and interference caused by poor connections or overly long lines.

[0063] Example 2

[0064] like Figure 1 and Figure 2 As shown, embodiment 2 of the present application provides an antenna filtering system, including:

[0065] A multi-band radio frequency communication system 6, the multi-band radio frequency communication system 6 having a main link 61;

[0066] Filter components, including:

[0067] The switch assembly 1 has an input terminal and a plurality of output terminals, wherein the input terminal is used to be electrically connected to the main link 61;

[0068] The filter assembly 2 includes a plurality of filters, each of which is electrically connected to an output terminal;

[0069] Processor 3 is signal-connected to switch component 1; processor 3 can control switch component 1 to selectively open one output terminal based on the currently processed frequency band information.

[0070] The multi-band RF communication system 6 can be a dual-band antenna, a tri-band antenna, or even an antenna with multiple frequency bands. The main link 61 of the multi-band RF communication system 6 is configured with an access point, and the interface of the access point can be an RF coaxial connector interface or a waveguide interface, etc. The input end of the switch component 1 can match the interface of the access point. For example, the interface of the access point and the input end of the switch component 1 can be the same type of interface, and signal transmission is achieved through direct connection, ensuring efficient signal transmission and reducing loss and interference that may be caused by intermediate links. Alternatively, the interface of the access point and the input end of the switch component 1 can be different types of interfaces, and the two are connected through an adapter. The adapter can perform conversion and matching functions, allowing signals to be smoothly transmitted between different types of interfaces.

[0071] The antenna filtering system provided in Example 2 of the present application includes the filtering component of Example 1. Since the switch component 1 has multiple output terminals and the filter component 2 has multiple filters, and each output terminal is connected to a filter, the switch component 1 and the filter component 2 achieve a compact layout and integrated design, and realize efficient signal switching and filtering functions in a limited space; the processor 3 controls the switch component 1 according to the currently processed frequency band information, and directs the main link 61 signal of the multi-band radio frequency communication system 6 to the appropriate filter, effectively removing interference signals, thereby significantly improving signal quality and stability.

[0072] like Figure 1 and Figure 2 As shown, in some embodiments, it also includes:

[0073] The nonlinear device 7 is disposed between the signal input end of the main link 61 and the filter component, and the nonlinear device 7 is electrically connected to the main link 61 .

[0074] When a signal passes through the nonlinear device 7, the waveform of the signal will be distorted, generating additional harmonics, because the input-output relationship of the nonlinear device 7 does not follow the linear superposition principle. The nonlinear device 7 is placed closer to the input end of the main link 61 relative to the filter component. Since the harmonics generated by the nonlinear device 7 in a single frequency band are basically the same, and the harmonics generated in different frequency bands are different, the harmonics generated by the nonlinear device 7 in each frequency band can be specifically tested. Based on the numerical value of the harmonics generated in each frequency band, it is determined which frequency band or bands need to process the harmonics generated by the nonlinear device 7, and corresponding filters are set. When the processor 3 obtains the processed frequency band information, it turns on the corresponding output end to effectively suppress the harmonic interference generated by the nonlinear device 7, thereby significantly improving the purity of the output signal and reducing distortion. The nonlinear device 7 can be connected to the main link 61 through an interface or a radio frequency cable, etc. The nonlinear device 7 may include a radio frequency amplifier and a diode, etc.

[0075] like Figure 1 and Figure 2 As shown, in some embodiments, the nonlinear device 7 includes:

[0076] RF test socket 71, electrically connected to the main link 61;

[0077] The frequency modulator 72 is disposed between the RF test socket 71 and the filter assembly, and is electrically connected to the main link 61 .

[0078] Welding points can be reserved on the circuit board of the main link 61, and the RF test socket 71 and the frequency modulator 72 can be welded to the main link 61 through the welding points to achieve electrical connection; alternatively, corresponding sockets can be provided on the circuit board of the main link 61, and the RF test socket 71 and the frequency modulator 72 can be electrically connected by plugging into the main link 61.

[0079] The RF test socket 71 provides a convenient test interface for the system. During product development, production, and maintenance, staff can quickly connect test equipment through the RF test socket 71 to monitor and analyze the signals of the main link 61, improving test efficiency and reducing test time and cost. The frequency modulator 72 can frequency modulate the signal in the main link 61. By adjusting the parameters of the frequency modulator 72, the frequency characteristics of the signal can be changed to meet different communication requirements.

[0080] In some embodiments, the multi-band RF communication system 6 has multiple sub-links 62, each of which is used to transmit signals in a different frequency band. Each filter is used to process the signal of at least one sub-link 62. Each sub-link 62 is specifically responsible for transmitting signals in a specific frequency band. When the multi-band RF communication system 6 includes multiple high frequency bands, multiple mid-frequency bands, and multiple low frequency bands, the multi-band RF communication system 6 may include a port switch 63, a mid-high frequency input module 64, and a low-mid-high frequency input and output module 65. The multiple sub-links 62 transmitting high frequency signals and the multiple sub-links 62 transmitting mid-frequency signals can be connected to the mid-high frequency input module 64 through a port switch 63, and then connected to the input of the low-mid-high frequency input and output module 65 through the mid-high frequency input module 64. The multiple sub-links 62 transmitting low frequency signals can be connected to the input of the low-mid-high frequency input and output module 65 through another port switch 63. The output of the low-mid-high frequency input and output module 65 is connected to the signal input of the main link 61.

[0081] Each filter can be used to process the signal of one sub-link 62. In this case, the number of filters can be equal to the number of sub-links 62, with a one-to-one correspondence between the filters and the frequency bands processed by the sub-links 62, thereby optimizing the signal quality of each frequency band. Alternatively, the number of filters can be less than the number of sub-links 62. In this case, filters can be set only for the frequency bands that require filtering (i.e., some sub-links 62 transmit frequency band signals that do not require filtering), thereby optimizing the signal quality of specific frequency bands. Alternatively, when the frequency bands processed by some sub-links 62 are similar in low, mid, or high frequency bands, each filter can be used to process the signals of multiple sub-links 62 transmitting similar frequency bands. This not only reduces hardware costs but also saves space, making the entire system more compact.

[0082] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A filter component, characterized in that: include: a switch assembly having an input end and a plurality of output ends, wherein the input end is used to electrically connect to a main link of a multi-band radio frequency communication system; A filter assembly, wherein the filter assembly comprises a plurality of filters, each of the filters being electrically connected to one of the output terminals; A processor is signal-connected to the switch component; the processor can control the switch component to selectively open one of the output ends based on the currently processed frequency band information.

2. The filter assembly according to claim 1, characterized in that The filter assembly has a plurality of filters including at least one of the following combinations: The plurality of filters process signals in different ways; The filtering characteristics of the plurality of filters are different; The multiple filters process different frequency ranges.

3. The filter assembly according to claim 2, characterized in that The filter assembly comprises at least one band filter and / or at least one notch filter.

4. The filter assembly according to claim 1, wherein: One of the output terminals is connected to a matching capacitor; and / or one of the output terminals is in an open circuit state.

5. The filter assembly according to claim 1, characterized in that The switch assembly includes a single-pole multi-throw switch having the input terminal and a plurality of output terminals.

6. The filter assembly according to claim 1, wherein: Also includes: A substrate, wherein the switch component and the filter component are both arranged on the substrate.

7. An antenna filtering system, characterized in that: include: A multi-band radio frequency communication system having a main link; Filter components, including: a switch assembly having an input end and a plurality of output ends, wherein the input end is used to be electrically connected to the main link; A filter assembly, wherein the filter assembly comprises a plurality of filters, each of the filters being electrically connected to one of the output terminals; A processor is signal-connected to the switch component; the processor can control the switch component to selectively open one of the output ends based on the currently processed frequency band information.

8. The antenna filtering system according to claim 7, wherein: Also includes: A nonlinear device is provided between the signal input end of the main link and the filter component, and the nonlinear device is electrically connected to the main link.

9. The antenna filtering system according to claim 8, wherein: The nonlinear device comprises: A radio frequency test socket, electrically connected to the main link; The frequency modulator is arranged between the radio frequency test socket and the filter component, and the frequency modulator is electrically connected to the main link.

10. The antenna filtering system according to claim 7, wherein: The multi-band radio frequency communication system has multiple sub-links, each of which is used to transmit signals in different frequency bands; each of the filters is used to process a signal of at least one of the sub-links.

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