Low-pass filter device
By introducing a combination of metal tubes and dielectric tubes into the low-pass filter to form a notch structure, the problem of increasing length of existing low-pass filters when improving attenuation performance is solved, and efficient signal filtering and cost savings are achieved.
Patent Information
- Application Number
- CN202421121635.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2023-05-31
- Filing Date
- 2024-05-22
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-05-22
AI Technical Summary
When existing low-pass filters improve attenuation performance, they cause increased device length, thereby increasing manufacturing costs.
A low-pass filter device is designed, which includes a metal tube inside and forms a notch, through the combination of the metal tube and the dielectric tube to improve attenuation performance without increasing the device length.
Compared with the same length of low-pass filter, the effect of improving attenuation performance is achieved, while reducing manufacturing costs, and saving production costs by shortening the device length.
Smart Images
Figure CN222775565U_ABST
Abstract
Description
[0001] CROSS-REFERENCE TO RELATED APPLICATIONS
[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0069807, filed on May 31, 2023, which is hereby incorporated by reference for all purposes as described herein. Technical Field
[0003] The present disclosure relates to low pass filter arrangements. Background Art
[0004] The contents recorded in this section are merely used to provide background information for the present disclosure and do not constitute prior art.
[0005] A filter is a device that uses the characteristics of frequency to shield unwanted signals and pass only the desired signals. There are many types of filters. A high-pass filter (HPF) is a filter that allows high-frequency signals to pass and shields low-frequency signals. A band-pass filter (BPF) is a filter that allows signals within a certain frequency band to pass and shields other signals. A low-pass filter (LPF) is a filter that allows low-frequency signals to pass and shields high-frequency signals.
[0006] Figure 1 This is a three-dimensional diagram of a conventional low-pass filter.
[0007] Reference Figure 1 , the existing low-pass filter 1 can be made by turning a round bar. The more the number of transformer components 3 (inductor member) and capacitor components 5 (capacitor member) is, the better the attenuation performance of the low-pass filter 1 is. Among them, the transformer component 3 forms a transformer (inductor) on the circuit diagram (circuit diagram, not shown), and the capacitor component 5 forms a capacitor (capacitor) on the circuit diagram. The more the number of transformer components 3 and capacitor components 5 arranged to improve the attenuation performance is, the longer the overall length of the low-pass filter 1 will be. The longer the length of the low-pass filter 1 is, the higher the manufacturing cost will be. Utility Model Content
[0008] 1. Technical issues to be resolved
[0009] Therefore, the present disclosure is proposed to solve the above-mentioned problems, and its purpose is to provide a low-pass filter device which includes a metal tube inside and forms a notch and has improved attenuation performance compared with the same length.
[0010] In addition, an object of the present disclosure is to reduce manufacturing costs by providing a low pass filter device having a shorter length compared to other products of the same performance.
[0011] (II) Technical solution
[0012] In order to achieve the above-mentioned purpose, according to one embodiment of the present disclosure, a low-pass filter device is provided, including: a first port, which is arranged on one side in the longitudinal direction; a second port, which is arranged on the other side in the longitudinal direction; a plurality of metal parts, which are arranged between the first port and the second port at intervals; a plurality of connecting parts, which are arranged between different metal parts among the plurality of metal parts; a first dielectric tube, which is arranged to surround at least one metal part among the plurality of metal parts; a metal tube, which is arranged to surround the first dielectric tube; and a second dielectric tube, which is arranged to surround the metal parts among the plurality of metal parts that are not surrounded by the first dielectric tube and the metal tube.
[0013] (III) Beneficial effects
[0014] As described above, according to the present embodiment, the low-pass filter device includes a metal tube inside and forms a notch, which has the effect of improving the attenuation performance compared with the same length.
[0015] Furthermore, it is possible to form a low-pass filter device having a shorter length than other products of the same performance, thereby having the effect of reducing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a three-dimensional diagram of a conventional low-pass filter.
[0017] Figure 2 is a stereoscopic diagram of a low-pass filter device according to an embodiment of the present disclosure.
[0018] Figure 3 is an exploded perspective view of a low-pass filter device according to an embodiment of the present disclosure.
[0019] Figure 4 is a cross-sectional view of a low-pass filter device according to an embodiment of the present disclosure.
[0020] Figure 5 It is along Figure 4 A-A' cross-sectional view.
[0021] Figure 6 is a graph illustrating attenuation characteristics of a low-pass filter device according to an embodiment of the present disclosure.
[0022] Figure 7 is a circuit diagram of a low-pass filter device according to an embodiment of the present disclosure.
[0023] Description of Reference Numerals
[0024] 10: Low pass filter device 100: First port
[0025] 200: Second port 300: Multiple metal parts
[0026] 400: a plurality of connection components 500: a first dielectric tube
[0027] 600: Metal tube 700: Second dielectric tube
[0028] 800: Shell DETAILED DESCRIPTION
[0029] Below, the embodiments of the present disclosure are described in detail with reference to the accompanying drawings. When the components of each figure are marked with reference numerals, the same reference numerals are used as much as possible even if the same technical features appear in different figures. It should also be noted that in the process of describing the present disclosure, if it is considered that the specific description of the relevant known technical features and functions may make the subject of the present disclosure unclear, its detailed description will be omitted.
[0030] In the process of describing the components of the embodiments involved in the present disclosure, terms such as first, second, i), ii), a), b) may be used. These terms are only used to distinguish one component from another component, and do not limit their essence, order or sequence, etc. In the specification, if a component is described as "including" or "having" another component, unless there is a special record to the contrary, it can be understood that one component also includes another component, rather than being understood as one component excluding another component.
[0031] In this disclosure, the longitudinal direction refers to Figure 4 The x-axis in the figure is the polarization direction. That is, the vertical direction refers to the length direction of the low-pass filter device 10.
[0032] Figure 2 is a stereoscopic diagram of a low-pass filter device according to an embodiment of the present disclosure.
[0033] Figure 3 is an exploded perspective view of a low-pass filter device according to an embodiment of the present disclosure.
[0034] Figure 4 is a cross-sectional view of a low-pass filter device according to an embodiment of the present disclosure.
[0035] Figure 5 It is along Figure 4 A-A' cross-sectional view.
[0036] Reference Figures 2 to 5 In one embodiment of the present disclosure, a low pass filter apparatus (10) includes a first port 100 (first port), a second port 200 (second port), a plurality of metal members 300 (metal members), a plurality of connecting members 400 (connecting members), a first dielectric tube 500 (first dielectric tube), a metal pipe 600 (metal pipe), a second dielectric tube 700 (second dielectric tube) and a case 800 (case) in whole or in part.
[0037] The first port 100 is arranged at one side in the longitudinal direction. The first port 100 is electrically connected to the plurality of metal components 300. The first port 100 can transmit an input signal to the plurality of metal components 300. The first port 100 can form a transformer. According to one embodiment, the first port 100 can be connected to the first metal component 300A.
[0038] The second port 200 is arranged on the other side of the longitudinal direction. The second port 200 outputs the filtered signal. The second port 200 is electrically connected to the plurality of metal components 300. The second port 200 can receive signals from the plurality of metal components 300. The second port 200 can form a transformer. According to one embodiment, the second port 200 can be connected to the fifth metal component 300E. According to Figure 3 to Figure 4 , the second port 200 is connected to the fifth metal component 300E, but is not limited thereto. For example, when the plurality of metal components 300 include three metal components, the second port 200 is connected to the third metal component 300C.
[0039] According to one embodiment, the first port 100 and the second port 200 may be formed with the same diameter size. According to one embodiment, the diameter of the first port 100 and the second port 200 may be larger than the diameter of the plurality of connection parts 400 and smaller than the diameter of the plurality of metal parts 300 .
[0040] The plurality of metal components 300 are arranged between the first port 100 and the second port 200. The plurality of metal components 300 may be arranged at intervals. The plurality of metal components 300 may form a capacitor.
[0041] The plurality of metal components 300 may include a first metal component 300A to an Nth metal component. In this case, the first metal component 300A to the Nth metal component are included in order based on the shortest distance from the first port 100. Wherein, N is a natural number greater than or equal to 2.
[0042] The plurality of metal components 300 according to an embodiment may include first to fifth metal components 300A to 300E. Figure 3 and Figure 4 The plurality of metal components 300 are shown as including first to fifth metal components 300A to 300E, but are not limited thereto. The plurality of metal components 300 may include more than five or less than five metal components.
[0043] The metal parts surrounded by the first dielectric tube 500 among the plurality of metal parts 300 may be formed with the same diameter. According to one embodiment, the outer peripheral surfaces of the first metal part 300A and the second metal part 300B may be surrounded by the first dielectric tube 500. In this case, the first metal part 300A and the second metal part 300B may be formed with the same diameter. Moreover, the diameters of the first metal part 300A and the second metal part 300B are smaller than the diameters of the third to fifth metal parts 300E.
[0044] According to one embodiment, each of the plurality of metal components 300 may be formed with the same or different lengths. The length of the metal component refers to the length in the longitudinal direction ( Figure 4 According to one embodiment, the length of the second metal component 300B may be greater than the length of the first metal component 300A.
[0045] According to one embodiment, the circumference of the outer circumference of the metal component not surrounded by the first dielectric tube 500 among the plurality of metal components 300 may be the same as the circumference of the outer circumference of the metal tube 600. According to one embodiment, the third metal component 300C to the fifth metal component 300E are not surrounded by the first dielectric tube 500, and the first metal component 300A to the second metal component 300B may be surrounded by the first dielectric tube 500. In this case, the circumference of the outer circumference of the third metal component 300C to the fifth metal component 300E may be the same as the circumference of the outer circumference of the metal tube 600. That is, the circumference of the outer circumference of all the component elements contacting the inner circumference of the second dielectric tube 700 is the same. As described above, when the circumference of the outer circumference of all the component elements is the same, the second dielectric tube 700 can stably fix the third metal component 300C to the fifth metal component 300E and the metal tube 600.
[0046] The plurality of connection components 400 are arranged between different metal components among the plurality of metal components 300. The plurality of connection components 400 are electrically connected to the plurality of metal components 300. The plurality of connection components 400 transmits input signals to the plurality of metal components 300. The plurality of connection components 400 may form a transformer. Figure 3 and Figure 4 The plurality of connection components 400 are shown as including first to fourth connection components 400A to 400D, but are not limited thereto. The plurality of connection components 400 may include more than four or less than four connection components.
[0047] The first dielectric tube 500 is arranged to surround at least one metal component among the plurality of metal components 300. The first dielectric tube 500 is arranged between the outer circumferential surfaces of the plurality of metal components 300 and the inner circumferential surface of the metal tube 600. According to one embodiment, the first dielectric tube 500 may be arranged to surround two or more metal components adjacent to each other among the plurality of metal components 300. According to one embodiment, the first dielectric tube 500 may be arranged to surround the first metal component 300A and the second metal component 300B.
[0048] Reference Figure 3 to Figure 4 The first dielectric tube 500 is shown as surrounding the first metal component 300A and the second metal component 300B, but is not limited thereto. The first dielectric tube 500 may be disposed to surround three or more metal components.
[0049] According to one embodiment, the first dielectric tube 500 may be made of Teflon (PTFE). According to one embodiment, the length of the first dielectric tube 500 may be greater than or equal to the length of the metal tube 600. When the length of the first dielectric tube 500 is greater than the length of the metal tube 600, the electrical stability of the low pass filter device 10 may be improved.
[0050] According to an embodiment, the first dielectric tube 500 may be a shrink tube. A shrink tube is a flexible tube having a property of shrinking upon heating. The shrink tube is mainly used as an insulator for wires and cables.
[0051] Figure 6 is a graph illustrating attenuation characteristics of a low-pass filter device according to an embodiment of the present disclosure.
[0052] Figure 7 is a circuit diagram of a low-pass filter device according to an embodiment of the present disclosure.
[0053] Reference Figures 2 to 7The metal tube 600 is arranged between the first dielectric tube 500 and the second dielectric tube 700. The metal tube 600 is arranged to surround the outer circumference of the first dielectric tube 500.
[0054] The metal tube 600 may form a capacitor CP. A notch (n) may be formed on a frequency response graph by the metal tube 600. The attenuation performance of the low-pass filter device 10 is improved by the notch (n).
[0055] The better the attenuation performance of the filter, the more effective filtering can be ensured. Since the attenuation performance is improved based on the notch (n), the low-pass filter device 10 can have a shorter longitudinal length than other filters that exhibit the same performance.
[0056] According to one embodiment, in order to achieve the same performance as the existing filter, the length of the low-pass filter device 10 is about 70% of the length of the existing filter. That is, in order to achieve the same performance, compared with the existing filter, the length of the filter can be shortened by more than 30%. As the length of the low-pass filter device 10 becomes shorter, the manufacturing cost can be saved. The number of transformers and capacitors is not limited to Figure 7 For example, the low-pass filter device 10 can be formed in different ways according to the number of metal parts 300 arranged, the length of the first dielectric tube 500, the number of first dielectric tubes 500 arranged, the length of the metal tube 600, the number of metal tubes 600 arranged, etc. Figure 7 A circuit diagram of a circuit diagram.
[0057] Reference Figure 3 and Figure 4 The metal tube 600 is shown as being arranged at the inner side of the second dielectric tube 700 with only one, but it is not limited thereto. A plurality of metal tubes 600 may be arranged. By arranging a plurality of metal tubes 600, the attenuation performance of the filter may be improved.
[0058] Reference Figure 4 The length of the metal tube 600 may be the same as the distance from the upper surface of the first metal component 300A to the lower surface of the second metal component 300B. The upper surface of the first metal component 300A refers to the surface close to the first port 100, and the lower surface of the second metal component 300B refers to the other surface close to the second port 200. The length of the metal tube 600 is not limited to Figure 4 The length of the metal tube 600 is not limited to the arrangement of the plurality of metal components 300 or the distance between the plurality of metal components 300 .
[0059] The second dielectric tube 700 is arranged inside the housing 800. The second dielectric tube 700 is arranged to surround the plurality of metal parts 300 and the metal tube 600. Specifically, the second dielectric tube 700 is arranged to surround the metal parts and the metal tube 600 of the plurality of metal parts 300 that are not surrounded by the first dielectric tube 500. According to one embodiment, the length of the second dielectric tube 700 may be greater than the length from the upper surface of the first metal part 300A to the lower surface of the fifth metal part 300E. In this case, the second dielectric tube 700 can stably fix the components arranged inside, thereby improving the electrical stability of the low-pass filter device 10.
[0060] According to one embodiment, the second dielectric tube 700 may be formed to surround the metal tube 600, the third metal component 300C, the fourth metal component 300D, and the fifth metal component 300E. In this case, the circumference of the outer circumference of the metal tube 600 is the same as the circumference of the outer circumference of the third metal component 300C, the fourth metal component 300D, and the fifth metal component 300E. Figure 3 , the second dielectric tube 700 surrounds the third to fifth metal components 300C to 300E and the metal tube 600, but is not limited thereto. Depending on the number of metal components arranged between the first port 100 and the second port 200, the number of metal components that the second dielectric tube 700 can surround is different. Depending on the number of metal components surrounded by the metal tube 600, the number of metal components that the second dielectric tube 700 can surround is different.
[0061] The second dielectric tube 700 is used to prevent current leakage or noise between adjacent components. The second dielectric tube 700 assists the operation of the low-pass filter device 10 by providing a stable electrical environment, thereby improving the filtering efficiency of the low-pass filter device 10. According to one embodiment, the second dielectric tube 700 can be made of Teflon. The second dielectric tube 700 can be a shrink tube.
[0062] The housing 800 has a receiving space formed inside. The housing 800 is formed to surround the second dielectric tube 700, the first port 100, and the second port 200. The housing 800 can improve the durability and electrical stability of the low pass filter device 10. Figure 2 and Figure 5 The cross section of the housing 800 is shown as a rectangular section including a hole in the center, but is not limited thereto. The cross section of the housing 800 may have various shapes.
[0063] The above description is only used to illustrate the technical idea of the present embodiment. For those with general knowledge in the technical field to which the present embodiment belongs, various modifications and variations can be made within the scope of the essential features of the present embodiment. Therefore, the present embodiment is not used to limit the technical idea of the present embodiment but is used for illustration, and the scope of the technical idea of the present embodiment is not limited by the present embodiment. The protection scope of the present embodiment shall be interpreted based on the attached claims, and all technical ideas within the scope equivalent to them shall be interpreted as belonging to the scope of rights of the present embodiment.
Claims
1. A low-pass filter device, characterized in that: include: A first port, which is arranged at one side in the longitudinal direction; A second port, which is arranged on the other side in the longitudinal direction; a plurality of metal components arranged between the first port and the second port at intervals; a plurality of connecting components arranged between different metal components among the plurality of metal components; a first dielectric tube disposed to surround at least one metal component of the plurality of metal components; a metal tube arranged to surround the first dielectric tube; as well as A second dielectric tube is arranged to surround the metal parts among the plurality of metal parts that are not surrounded by the first dielectric tube and the metal tube.
2. The low-pass filter device according to claim 1, characterized in that The first dielectric tube is arranged to surround at least two metal components adjacent to each other among the plurality of metal components.
3. The low-pass filter device according to claim 1, characterized in that The plurality of metal components include a first metal component, The plurality of metal components include second to N-th metal components, The first metal component is arranged closest to the first port, The Nth metal component is arranged farthest from the first port, N is a natural number greater than 3, The first dielectric tube is arranged to surround the first metal component and the second metal component.
4. The low-pass filter device according to claim 1, characterized in that Each of the plurality of metal parts is formed with a length different from each other.
5. The low-pass filter device according to claim 1, characterized in that The plurality of metal components include a first metal component, The plurality of metal components include second to N-th metal components, The first metal component is arranged closest to the first port, The Nth metal component is arranged farthest from the first port, N is a natural number greater than 3, The length of the second metal component is greater than the length of the first metal component.
6. The low-pass filter device according to claim 1, characterized in that Diameters of metal parts surrounded by the first dielectric tube among the plurality of metal parts are formed to have the same size.
7. The low-pass filter device according to claim 1, characterized in that The plurality of metal components include a first metal component, The plurality of metal components include second to N-th metal components, The first metal component is arranged closest to the first port, The Nth metal component is arranged farthest from the first port, N is a natural number greater than 3, A diameter of the first metal member and a diameter of the second metal member are formed to be the same size.
8. The low-pass filter device according to claim 1, characterized in that The circumference of the outer peripheral surface of the metal component not surrounded by the first dielectric tube among the plurality of metal components is the same as the circumference of the outer peripheral surface of the metal tube.
9. The low-pass filter device according to claim 1, characterized in that The plurality of metal components include a first metal component, a second metal component, a third metal component, a fourth metal component and a fifth metal component, The first metal component is arranged closest to the first port, The fifth metal component is arranged farthest from the first port, The first metal component and the second metal component are surrounded by the first dielectric tube, The third to fifth metal components are not surrounded by the first dielectric tube, The circumference of the outer circumferential surface of the third to fifth metal members is the same as the circumference of the outer circumferential surface of the metal pipe.
10. The low-pass filter device according to claim 1, wherein: The length of the first dielectric tube is greater than or equal to the length of the metal tube.
11. The low-pass filter device according to claim 1, characterized in that The metal tube forms a capacitor.
12. The low-pass filter device according to claim 1, characterized in that The metal tube forms a notch for improving attenuation performance.
13. The low-pass filter device according to claim 1, characterized in that The second dielectric tube further includes a housing for surrounding the first port and the second port.
14. The low-pass filter device according to claim 1, characterized in that The first port and the second port are formed with the same diameter.
15. The low-pass filter device according to claim 1, characterized in that The diameters of the first port and the second port are smaller than the diameters of the plurality of metal parts and larger than the diameters of the plurality of connection parts.
16. The low-pass filter device according to claim 1, characterized in that At least one of the first dielectric tube and the second dielectric tube is made of Teflon.
17. The low-pass filter device according to claim 1, characterized in that At least one of the first dielectric tube and the second dielectric tube is a shrink tube based on heat shrinkage.
18. The low-pass filter device according to claim 1, characterized in that The plurality of metal components include a first metal component, The plurality of metal components include second to N-th metal components, The first metal component is arranged closest to the first port, The Nth metal component is arranged farthest from the first port, N is a natural number greater than 3, The length of the metal pipe is the same as the distance from the upper surface of the first metal member to the lower surface of the second metal member.
19. The low-pass filter device according to claim 1, characterized in that The plurality of metal components include a first metal component, a second metal component, a third metal component, a fourth metal component and a fifth metal component, The first metal component is arranged closest to the first port, The fifth metal component is arranged farthest from the first port, The length of the second dielectric tube is greater than the length from the upper surface of the first metal member to the lower surface of the fifth metal member.