A hybrid-mode filter

Abstract

The present invention provides a hybrid-mode filter, which includes a filter body, a cover plate, a metal resonance component, and a comb-shaped resonance component. The cover plate is covered on the filter body. The filter body includes a first accommodation cavity and a second accommodation cavity opened in the filter body. The metal resonance component is fixed in the first accommodation cavity. The metal resonance component, the cavity wall of the first accommodation cavity, and the cover plate enclose a metal coaxial cavity. The comb-shaped resonance component is fixed in the second accommodation cavity. The comb-shaped resonance component, the cavity wall of the second accommodation cavity, and the cover plate enclose a comb-line cavity. A coupling window is provided between the metal coaxial cavity and the comb-line cavity, and the metal coaxial cavity and the comb-line cavity are communicated through the coupling window. The hybrid-mode filter realizes the strong zero-point cavity with a metal coaxial cavity and the weak pole with a comb-line cavity, and combines them into a single filter, achieving a filter product with high integration, high performance, low cost, and high quality in a limited space.

Description

Technical Field

[0001] The present invention relates to the field of filters, and more particularly to a hybrid-mode filter. Background Art

[0002] A filter is a filtering circuit composed of capacitors, inductors, and resistors. The filter can effectively filter out specific frequency points in the power supply line or frequencies outside that frequency point, obtaining a power supply signal with a specific frequency, or eliminating the power supply signal after a specific frequency.

[0003] In the current filter industry, due to the high degree of integration requirements of products by clients, small volume requirements, and low cost requirements, existing filters are difficult to meet the client's index requirements, volume requirements, and low-cost needs under the condition of limited space requirements; if the client's needs are met, it is difficult to ensure the product performance indicators. Summary of the Invention

[0004] The technical problem to be solved by the embodiments of the present invention is that existing filters have limited space and it is difficult to achieve high integration, small volume, and low cost of the products.

[0005] To solve the above technical problem, the technical solution adopted by the embodiments of the present invention is as follows:

[0006] The embodiments of the present invention provide a hybrid-mode filter, including a filter body, a cover plate, a metal resonance component, and a comb-shaped resonance component. The cover plate covers the filter body. The filter body includes a first accommodation cavity and a second accommodation cavity opened in the filter body. The metal resonance component is fixed in the first accommodation cavity. The metal resonance component, the cavity wall of the first accommodation cavity, and the cover plate enclose a metal coaxial cavity. The comb-shaped resonance component is fixed in the second accommodation cavity. The comb-shaped resonance component, the cavity wall of the second accommodation cavity, and the cover plate enclose a comb-shaped line cavity. A coupling window is provided between the metal coaxial cavity and the comb-shaped line cavity, and the metal coaxial cavity and the comb-shaped line cavity are communicated through the coupling window.

[0007] Further, there are at least two comb-shaped resonance components, and the comb-shaped resonance components are spaced apart from each other. The comb-shaped resonance component includes a comb-shaped line resonance platform. The comb-shaped resonance component is connected to the side wall of the comb-shaped line cavity through the comb-shaped line resonance platform, and adjacent comb-shaped line resonance platforms are connected through coupling connecting ribs.

[0008] Further, the comb-shaped resonant assembly further includes a first debugging nut, a first debugging screw, and a comb-shaped wire resonant column. The first debugging screw is fixed to the cover plate through the first debugging nut. The comb-shaped wire resonant column is suspended in the comb-shaped wire cavity through the comb-shaped wire resonant platform. The comb-shaped wire resonant column is disposed opposite to the first debugging screw, and there is a first gap between the comb-shaped wire resonant column and the first debugging screw.

[0009] Further, the comb-shaped wire resonant platform extends from the side wall of the comb-shaped wire cavity to the opposite side. The comb-shaped wire resonant platform is columnar. There is a second gap between the comb-shaped wire resonant platform and the cover plate, and between the comb-shaped wire resonant platform and the bottom wall of the comb-shaped wire cavity away from the cover plate. The comb-shaped wire resonant platforms are spaced apart.

[0010] Further, a through hole is formed on one side of the comb-shaped wire resonant column close to the first debugging screw, and the width of the through hole is greater than the width of the first debugging screw.

[0011] Further, there are at least two metal coaxial cavities, and each metal coaxial cavity is provided with the metal resonant assembly. The metal coaxial cavities are spaced apart from each other. There is a resonant cavity window between adjacent metal coaxial cavities. Adjacent metal coaxial cavities are communicated through the corresponding resonant cavity windows, and one metal coaxial cavity close to the comb-shaped wire cavity is communicated with the comb-shaped wire cavity through a coupling window.

[0012] Further, a fixing seat is arranged in the metal coaxial cavity. The metal resonant assembly includes a second debugging nut, a second debugging screw, and a metal resonant rod. The second debugging screw is fixed to the cover plate through the second debugging nut. The metal resonant rod is fixed to the fixing seat. The metal resonant rod is disposed opposite to the second debugging screw, and there is a third gap between the metal resonant rod and the second debugging screw.

[0013] Further, a groove is formed on one side of the metal resonant rod close to the cover plate, and the width of the groove is greater than the width of the second debugging screw. A fixing hole is formed on the side of the groove away from the cover plate. The metal resonant rod is connected to the fixing seat through the fixing hole.

[0014] Further, a tuning component is arranged on the resonant cavity window. The tuning component includes a third debugging screw and a third debugging nut. The third debugging screw is fixed to the cover plate through the third debugging nut. The third debugging screw is suspended in the resonant cavity window.

[0015] Further, the filter body further includes a fixing post disposed on one side of the coupling window. A hybrid coupling copper sheet is fixed on the fixing post, and the metal resonant rod and the comb-shaped line resonant post are coupled and connected through the hybrid coupling copper sheet.

[0016] The beneficial effects of the embodiments of the present invention are as follows: The embodiments of the present invention provide a hybrid-mode filter, including a filter body, a cover plate, a metal resonant component, and a comb-shaped resonant component. The cover plate covers the filter body. The filter body includes a first accommodation cavity and a second accommodation cavity opened in the filter body. The metal resonant component is fixed in the first accommodation cavity. The metal resonant component, the cavity wall of the first accommodation cavity, and the cover plate enclose a metal coaxial cavity. The comb-shaped resonant component is fixed in the second accommodation cavity. The comb-shaped resonant component, the cavity wall of the second accommodation cavity, and the cover plate enclose a comb-shaped line cavity. A coupling window is provided between the metal coaxial cavity and the comb-shaped line cavity, and the metal coaxial cavity and the comb-shaped line cavity are communicated through the coupling window. The hybrid-mode filter uses a metal coaxial cavity to realize a strong zero-point cavity and a comb-shaped line cavity to realize a weak pole, and combines them into a filter, achieving a filter product with high integration, high performance, low cost, and high quality in a limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following details the specific structure of the embodiments of the present invention with reference to the drawings

[0018] Figure 1 is a schematic structural diagram of the hybrid-mode filter provided by the embodiments of the present invention;

[0019] Figure 2 is a first-angle structural diagram of the hybrid-mode filter provided by the embodiments of the present invention;

[0020] Figure 3 is a cross-sectional view of the embodiment of the present invention along the Figure 1 A-A direction. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To describe in detail the technical content, structural features, achieved objectives, and effects of the present invention, the following is described in detail in conjunction with the embodiments and with reference to the drawings.

[0022] The following details the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0023] Please refer to Figures 1 to 3, an embodiment of the present invention provides a hybrid-mode filter, which includes a filter body 1, a cover plate 2, a metal resonant component 3, and a comb-shaped resonant component 4. The cover plate 2 is covered on the filter body 1. The filter body 1 includes a first accommodation cavity and a second accommodation cavity opened in the filter body 1. The metal resonant component 3 is fixed in the first accommodation cavity. The metal resonant component 3, the cavity wall of the first accommodation cavity, and the cover plate 2 enclose a metal coaxial cavity 5. The comb-shaped resonant component 4 is fixed in the second accommodation cavity. The comb-shaped resonant component 4, the cavity wall of the second accommodation cavity, and the cover plate 2 enclose a comb-line cavity 6. A coupling window 7 is provided between the metal coaxial cavity 5 and the comb-line cavity 6. The metal coaxial cavity 5 and the comb-line cavity 6 are communicated through the coupling window 7.

[0024] The hybrid-mode filter of this embodiment uses a metal coaxial cavity 5 to implement a strong zero cavity and a comb-line cavity 6 to implement a weak pole, and combines them into a filter. It can achieve a filter product with high integration, high performance, low cost, and high quality within the limited space of the filter body 1. Its S-parameter design is not only comparable to that of a coaxial cavity, but also has high production and manufacturing efficiency.

[0025] It should be noted that the cover plate 2 and the filter body 1 are fixedly connected by a threaded connection. Internal threads are provided on the filter body 1 and the cover plate 2, and the threaded structure is used for detachable connection, which is beneficial to reducing the assembly difficulty and improving the assembly efficiency. Of course, the connection form between the cover plate 2 and the filter body 1 is not limited to this. In other embodiments, the cover plate 2 and the filter body 1 can also be connected by screws or other connection methods. It should be understood that the specific fixing method between the cover plate 2 and the filter body 1 is determined according to the actual application scenario, and the embodiment of the present invention does not limit this.

[0026] Furthermore, there are at least two comb-shaped resonant components 4, and the comb-shaped resonant components 4 are arranged at intervals. The comb-shaped resonant component 4 includes a comb-line resonant platform 401. The comb-shaped resonant component 4 is connected to the side wall of the comb-line cavity 6 through the comb-line resonant platform 401, and adjacent comb-line resonant platforms 401 are connected by a coupling connecting rib 8. There are at least two metal coaxial cavities 5, and each metal coaxial cavity 5 is provided with a metal resonant component 3. The metal coaxial cavities 5 are arranged at intervals. There is a resonant cavity window 9 between adjacent metal coaxial cavities 5. Adjacent two metal coaxial cavities 5 are communicated through the corresponding resonant cavity window 9, and a metal coaxial cavity 5 close to the comb-line cavity 6 is communicated with the comb-line cavity 6 through the coupling window 7.

[0027] In this embodiment, there are three comb-shaped resonant components 4 and four metal resonant components 3. It should be noted that the three comb-shaped resonant components 4 can be arranged in three comb-shaped line cavities 6 or in the same comb-shaped line cavity 6; the four metal resonant components 3 can be arranged in four metal coaxial cavities 5 or in the same metal coaxial cavity 5. In this embodiment, the three comb-shaped resonant components 4 are arranged at intervals in the same comb-shaped line cavity 6, which saves more materials and can make better use of space. The three comb-shaped resonant components 4 form a weak zero point, and the zero points generated between the comb-shaped resonant components 4 are realized through the coupling connecting ribs 8 between the comb-shaped line resonant platforms 401. In this embodiment, the four metal resonant components 3 are arranged in four metal coaxial cavities 5, and strong zero points are formed between the metal coaxial cavities 5. The four metal coaxial cavities 5 are arranged in a matrix, in a 2×2 arrangement. Resonant cavity windows 9 are provided at the joints of adjacent two metal coaxial cavities 5, and the two diagonally arranged metal resonant components 3 can be connected through a resonant connecting rib 10, and the resonant connecting rib 10 can be arranged in the resonant cavity window 9. Among them, a coupling window 7 is provided in the metal coaxial cavity 5 far from the comb-shaped line resonant platform 401 in the two metal coaxial cavities 5 close to the comb-shaped line cavity 6, and the coupling window 7 is arranged on the side close to the comb-shaped line cavity 6. A metal coaxial cavity wall 502 is provided in the metal coaxial cavity 5 close to the comb-shaped line resonant platform 401, and the metal coaxial cavity wall 502 is arranged on the side close to the comb-shaped line cavity 6. In this embodiment, by arranging the three comb-shaped resonant components 4 and the four metal resonant components 3 in the limited space of the filter body 1, a design with multiple cavities and multiple zero points can be realized. When the S-parameter design is the same as the prior art, the cost advantage is more obvious, the production and manufacturing efficiency is high, and the product quality and reliability are good.

[0028] It should be noted that in another embodiment, the comb-shaped resonant component 4 can be three, and the metal resonant component 3 can be five. It should be understood that the specific number of the comb-shaped resonant component 4 and the metal resonant component 3 is determined according to the actual application scenario, and the embodiments of the present invention do not limit this.

[0029] Further, the comb-shaped resonant component 4 further includes a first debugging nut 402, a first debugging screw 403, and a comb-shaped wire resonant column 404. The first debugging screw 403 is fixed to the cover plate 2 through the first debugging nut 402. The comb-shaped wire resonant column 404 is suspended in the comb-shaped wire cavity 6 through the comb-shaped wire resonant platform 401. The comb-shaped wire resonant column 404 is disposed opposite to the first debugging screw 403, and there is a first gap between the comb-shaped wire resonant column 404 and the first debugging screw 403. The comb-shaped wire resonant platform 401 extends from the side wall of the comb-shaped wire cavity 6 to the opposite side. The comb-shaped wire resonant platform 401 is columnar. There is a second gap 405 between the comb-shaped wire resonant platform 401 and the cover plate 2 and between the comb-shaped wire resonant platform and the bottom wall of the comb-shaped wire cavity 6 away from the cover plate 2. The comb-shaped wire resonant platforms 401 are spaced apart. A through hole 406 is formed on the side of the comb-shaped wire resonant column 404 close to the first debugging screw 403. The width of the through hole 406 is greater than the width of the first debugging screw 403.

[0030] In this embodiment, the comb-shaped wire resonant platform 401 is connected between the cavity wall of the comb-shaped wire cavity 6 and the comb-shaped wire resonant column 404, which plays a role in fixing the comb-shaped wire cavity 6. At the same time, the comb-shaped wire resonant column 404 is suspended in the comb-shaped wire cavity 6, which can save space, and the second gap 405 can better realize space utilization and spacing adjustment. At the same time, the zero points generated between the comb-shaped resonant components 4 are realized through the coupling connecting ribs 8 between the comb-shaped wire resonant platforms 401. The cover plate 2 is provided with a connection hole for fixing the first debugging screw 403 and the first debugging nut 402. The first debugging screw 403 is fixed to the connection hole through the first debugging nut 402. The first debugging screw 403 and the first debugging nut 402 are used to adjust the spacing of the first gap. The through hole 406 provides a movement space for the first debugging screw 403 to adjust the spacing, and the width of the through hole 406 is greater than the width of the first debugging screw 403, which can prevent the first debugging screw 403 from being unable to move, getting stuck, or moving smoothly when adjusting the spacing.

[0031] Further, a fixing seat 501 is provided in the metal coaxial cavity 5. The metal resonant component 3 includes a second debugging nut 301, a second debugging screw 302, and a metal resonant rod 303. The second debugging screw 302 is fixed to the cover plate 2 through the second debugging nut 301. The metal resonant rod 303 is fixed to the fixing seat 501. The metal resonant rod 303 is disposed opposite to the second debugging screw 302, and there is a third gap 304 between the metal resonant rod 303 and the second debugging screw 302. A groove 305 is formed on the side of the metal resonant rod 303 close to the cover plate 2. The width of the groove 305 is greater than the width of the second debugging screw 302, and a fixing hole is formed on the side of the groove 305 away from the cover plate 2. The metal resonant rod 303 is connected to the fixing seat 501 through the fixing hole.

[0032] In this embodiment, the fixing hole and the fixing seat 501 are fixedly connected by screws. Of course, the connection form between the fixing hole and the fixing seat 501 is not limited to this. In other embodiments, the fixing hole and the fixing seat 501 can also be fixed by gluing. It should be understood that the specific fixing method between the fixing hole and the fixing seat 501 is determined according to the actual application scenario, and this embodiment of the present invention does not limit it; the fixing seat 501 is used to fix the metal resonance rod 303. The cover plate 2 is provided with a connection hole for fixing the second debugging screw 302 and the second debugging nut 301. The second debugging screw 302 is fixed to the connection hole through the second debugging nut 301 to improve the stability of the structure; the second debugging screw 302 and the second debugging nut 301 are used to adjust the distance of the third interval 304. The groove 305 provides a movement place for the second debugging screw 302 when adjusting the distance, and the width of the groove 305 is greater than the width of the second debugging screw 302, which can avoid the situation that the second debugging screw 302 cannot move, gets stuck or moves smoothly when adjusting the distance.

[0033] Further, a tuning component 11 is provided in the resonator window 9. The tuning component 11 includes a third debugging screw 1101 and a third debugging nut 1102. The third debugging screw 1101 is fixed to the cover plate 2 through the third debugging nut 1102, and the third debugging screw 1101 is suspended in the resonator window 9.

[0034] In this embodiment, the cover plate 2 is provided with a connection hole for fixing the third debugging screw 1101 and the third debugging nut 1102. The third debugging screw 1101 is fixed to the connection hole through the third debugging nut 1102 to improve the stability of the structure; the third debugging nut 1102 is mainly used to facilitate locking the connection between the third debugging screw 1101 and the cover plate 2 after debugging. The third debugging screw 1101 is located between the resonator windows 9 and can be used to finely adjust the coupling strength to improve the reliability of the product.

[0035] Further, the filter body 1 further includes a fixing column 12. The fixing column 12 is arranged on one side of the coupling window 7, and a hybrid coupling copper sheet 13 is fixed on the fixing column 12. The metal resonance rod 303 and the comb-shaped line resonance column 404 are coupled and connected through the hybrid coupling copper sheet 13.

[0036] In this embodiment, the fixing column 12 is used to fix the hybrid coupling copper sheet 13. The fixing column 12 and the hybrid coupling copper sheet 13 are fixedly connected by screws. The coupling between the metal resonance rod 303 and the comb-shaped line resonance column 404 is realized by using the hybrid coupling copper sheet 13.

[0037] The hybrid-mode filter provided by the present invention uses a metal coaxial cavity to implement a strong zero cavity and a comb-line cavity to implement a weak pole, and combines them into a single filter, which can achieve a filter product with high integration, high performance, low cost, and high quality within the limited space of the filter body.

[0038] The above are only embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural or equivalent process transformation made using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall similarly be included in the patent protection scope of the present invention.

Claims

1. A hybrid-mode filter, characterized in that: It includes a filter body, a cover plate, a metal resonant component, and a comb-shaped resonant component. The cover plate covers the filter body, and a threaded connection is adopted between the cover plate and the filter body. The filter body includes a first accommodation cavity and a second accommodation cavity opened in the filter body. The metal resonant component is fixed in the first accommodation cavity. The metal resonant component, the cavity wall of the first accommodation cavity, and the cover plate enclose a metal coaxial cavity. The comb-shaped resonant component is fixed in the second accommodation cavity. The comb-shaped resonant component, the cavity wall of the second accommodation cavity, and the cover plate enclose a comb-shaped line cavity. A coupling window is provided between the metal coaxial cavity and the comb-shaped line cavity, and the metal coaxial cavity and the comb-shaped line cavity are communicated through the coupling window; There are at least two comb-shaped resonant components, and the comb-shaped resonant components are arranged at intervals; The comb-shaped resonant component includes a comb-shaped line resonant platform, a first adjustment nut, a first adjustment screw, and a comb-shaped line resonant column. The comb-shaped resonant component is connected to the side wall of the comb-shaped line cavity through the comb-shaped line resonant platform, and adjacent comb-shaped line resonant platforms are connected through a coupling connecting rib. The first adjustment screw is fixed to the cover plate through the first adjustment nut. The comb-shaped line resonant column is suspended in the comb-shaped line cavity through the comb-shaped line resonant platform. The comb-shaped line resonant column is arranged opposite to the first adjustment screw, and there is a first interval between the comb-shaped line resonant column and the first adjustment screw.

2. The hybrid-mode filter according to claim 1, wherein: The comb-shaped line resonant platform extends from the side wall of the comb-shaped line cavity to the opposite side. The comb-shaped line resonant platform is columnar. There is a second interval between the comb-shaped line resonant platform and the cover plate, and between the comb-shaped line resonant platform and the bottom wall of the comb-shaped line cavity away from the cover plate. The comb-shaped line resonant platforms are arranged at intervals.

3. The hybrid-mode filter according to claim 1, wherein: A through hole is opened on one side of the comb-shaped line resonant column close to the first adjustment screw, and the width of the through hole is greater than the width of the first adjustment screw.

4. The hybrid-mode filter according to claim 1, wherein: There are at least two metal coaxial cavities, and each metal coaxial cavity is provided with a metal resonant component. The metal coaxial cavities are arranged at intervals. There is a resonant cavity window between adjacent metal coaxial cavities, and adjacent metal coaxial cavities are communicated through the corresponding resonant cavity window. And one metal coaxial cavity close to the comb-shaped line cavity is communicated with the comb-shaped line cavity through the coupling window.

5. The hybrid-mode filter according to claim 4, wherein: A fixing seat is arranged in the metal coaxial cavity. The metal resonant component includes a second adjustment nut, a second adjustment screw, and a metal resonant rod. The second adjustment screw is fixed to the cover plate through the second adjustment nut. The metal resonant rod is fixed to the fixing seat. The metal resonant rod is arranged opposite to the second adjustment screw, and there is a third interval between the metal resonant rod and the second adjustment screw.

6. The hybrid-mode filter according to claim 5, wherein: A groove is opened on one side of the metal resonant rod close to the cover plate. The width of the groove is greater than the width of the second adjustment screw. And a fixing hole is opened on the side of the groove away from the cover plate. The metal resonant rod is connected to the fixing seat through the fixing hole.

7. The hybrid-mode filter according to claim 4, wherein: A tuning component is provided on the resonator window. The tuning component includes a third debugging screw and a third debugging nut. The third debugging screw is fixed to the cover plate through the third debugging nut, and the third debugging screw is suspended over the resonator window.

8. The hybrid-mode filter according to claim 5, wherein: The filter body further includes a fixing post. The fixing post is disposed on one side of the coupling window. A hybrid coupling copper sheet is fixed on the fixing post. The metal resonant rod and the comb-shaped line resonant column are coupled and connected through the hybrid coupling copper sheet.

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