Filter and communication device
The filter addresses filtering accuracy and secondary harmonics issues by using capacitive coupling between resonators, improving communication quality and reducing costs.
Patent Information
- Application Number
- CN202420544629.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-19
AI Technical Summary
Existing RF and microwave filters face challenges in achieving high filtering accuracy and suppressing secondary harmonics at high frequencies, particularly with the flying rod structure, which generates clutter and interferes with communication signals.
A filter design incorporating capacitive coupling between resonators through coupling members, avoiding the use of flying rods, thereby realizing negative zero points and preventing secondary harmonics, while reducing assembly costs.
The filter achieves improved communication quality by eliminating secondary harmonics and clutter, enhancing filtering accuracy, and reducing assembly costs through capacitive coupling between resonators.
Smart Images
Figure CN222168659U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of communication technology, and in particular to a filter and a communication device. Background Art
[0002] A filter is a frequency filtering device that selects signals in the required frequency band and suppresses signals in the unnecessary frequency band. Filters are widely used in RF, microwave and other communication fields. Currently, the most widely used filter in RF and microwave bands is the coaxial cavity filter, which forms the desired working characteristics by adjusting the resonant frequency of the resonator and the coupling strength between the resonators. In actual application, as the spectrum isolation segments of different system networks become narrower and narrower, higher requirements are placed on the filtering accuracy of the filter.
[0003] With the development of communication technology, filters are widely used. In metal filters, to achieve negative zero point, flying rods and flying rod seats are usually used, that is, the flying rod is fixed between the two resonant cavities through the flying rod seat, and capacitive coupling is formed through the gap between the flying rod and the resonant rod, so as to achieve negative zero point. However, due to the influence of the length of the flying rod itself, secondary harmonics will be generated at high frequencies. Generally, low-pass filters are added to suppress the clutter. However, with the rapid development of 5GHz and other communications, the communication frequency is getting higher and higher. If the high-frequency filter adopts the flying rod structure, clutter will be generated at the near end of the channel, and low-pass filtering can no longer suppress the clutter, thereby interfering with the communication signal in the channel. Utility Model Content
[0004] In view of this, the purpose of the present application is to provide a filter and a communication device, aiming to solve the technical problems in the prior art.
[0005] To achieve the above objectives, the technical solutions adopted in this application are as follows:
[0006] In a first aspect, an embodiment of the present application provides a filter, including:
[0007] A filter body, wherein the filter body has a first accommodating cavity;
[0008] A resonance component, wherein the resonance component is arranged in the first accommodating cavity, the resonance component includes a first resonator and a second resonator, and the first resonator includes a first coupling member, the second resonator includes a second coupling member, a capacitive coupling is formed between the first resonator and the second resonator through the first coupling member and the second coupling member, and the first coupling member and the second coupling member are used to realize the negative zero point of the filter and avoid the generation of second harmonics.
[0009] In one of the embodiments of the first aspect, the filter body further includes a bottom plate, and the resonant component is fixedly connected to the bottom plate.
[0010] In one embodiment of the first aspect, the filter body has a first resonant cavity, a second resonant cavity and a third resonant cavity, a first coupling window is arranged between the first resonant cavity and the second resonant cavity, a second coupling window is arranged between the second resonant cavity and the third resonant cavity, a third coupling window is arranged between the first resonant cavity and the third resonant cavity, and the first resonant cavity, the second resonant cavity and the third resonant cavity are connected to form the first accommodating cavity.
[0011] In one embodiment of the first aspect, the first resonator is disposed in the first resonant cavity, and the first resonator is fixedly connected to the bottom plate;
[0012] The second resonator is arranged in the second resonant cavity, and the second resonator is fixedly connected to the bottom plate;
[0013] The resonant component further includes a third resonator, which is disposed in the third resonant cavity, the third resonator is coupled to the first resonator through the third coupling window, and the third resonator is coupled to the second resonator through the second coupling window.
[0014] In one embodiment of the first aspect, the first resonator further comprises a first resonant rod, the first resonant rod is disposed in the first resonant cavity, and one end of the first resonant rod is fixedly connected to the bottom plate;
[0015] The first coupling member is arranged at an end of the first resonant rod away from the bottom plate, and the first coupling member is located at a side of the first resonant rod close to the second resonator. The first coupling member is used to generate capacitive coupling between the first resonator and the second resonator.
[0016] In one embodiment of the first aspect, the first coupling member comprises:
[0017] A first connecting rod, the first connecting rod is arranged at an end of the first resonant rod away from the first resonant rod, and the first connecting rod is fixedly connected to the first resonant rod;
[0018] A first coupling plate is provided at one end of the first connecting rod close to the second resonator, and the first coupling plate is used for capacitively coupling the first resonator and the second resonator.
[0019] In one embodiment of the first aspect, the second resonator further comprises a second resonant rod, the second resonant rod is disposed in the second resonant cavity, and the second resonant rod is fixedly connected to the bottom plate;
[0020] The second coupling member is arranged at an end of the second resonant rod away from the bottom plate, the second coupling member is fixedly connected to the second resonant rod, and the second coupling member is arranged corresponding to the first coupling member.
[0021] In one embodiment of the first aspect, the second coupling member includes a second connecting rod, the second connecting rod is arranged at an end of the second resonant rod away from the base plate, the second connecting rod is located on a side of the second resonant rod close to the first resonator, and the second connecting rod is fixedly connected to the second resonant rod.
[0022] In one embodiment of the first aspect, the second coupling member further includes a second coupling plate, the second coupling plate is arranged at an end of the second connecting rod close to the first resonator, the second coupling plate is fixedly connected to the second connecting rod, the second coupling plate is arranged corresponding to the first coupling plate, the first coupling plate and the second coupling plate form a capacitor structure, and capacitive coupling is formed between the first resonator and the second resonator through the first coupling plate and the second coupling plate.
[0023] In a second aspect, an embodiment of the present application provides a communication device, comprising the filter described in any of the above embodiments.
[0024] Compared with the prior art, the beneficial effects of the present application are as follows: the present application proposes a filter and a communication device. The filter includes a filter body and a resonance component. The filter body has a first accommodating cavity. The resonance component is arranged in the first accommodating cavity. The resonance component includes a first resonator and a second resonator. The first resonator includes a first coupling member, and the second resonator includes a second coupling member. Capacitive coupling is formed between the first resonator and the second resonator through the first coupling member and the second coupling member. The first coupling member and the second coupling member are used to realize the negative zero point of the filter and avoid the generation of second harmonics. The present application generates capacitive coupling between the first resonator and the second resonator through the first coupling member and the second coupling member in the resonance component, thereby realizing the negative zero point of the filter and avoiding the generation of second harmonics, improving the communication quality of the filter, and reducing the assembly cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0026] Figure 1A schematic diagram of the three-dimensional structure of the filter in this application is shown;
[0027] Figure 2 Another schematic diagram of the three-dimensional structure of the filter in the present application is shown;
[0028] Figure 3 Another three-dimensional structural schematic diagram of the filter in the present application is shown;
[0029] Figure 4 A schematic diagram of the structure of the filter in the present application from one perspective is shown;
[0030] Figure 5 Another perspective structural schematic diagram of the filter in this application is shown.
[0031] Description of main component symbols:
[0032] 100-filter; 110-filter body; 111-first accommodating cavity; 1111-first resonant cavity; 1112-second resonant cavity; 1113-third resonant cavity; 112-bottom plate; 113-first coupling window; 114-second coupling window; 115-third coupling window; 120-resonant component; 121-first resonator; 1211-first resonant rod; 1212-first coupling member; 1212a-first connecting rod; 1212b-first coupling plate; 122-second resonator; 1221-second resonant rod; 1222-second coupling member; 1222a-second connecting rod; 1222b-second coupling plate; 123-third resonator; 1231-third resonant rod. DETAILED DESCRIPTION
[0033] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.
[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0036] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0037] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0038] like Figure 1 and Figure 3 As shown, an embodiment of the present application provides a filter 100. The filter 100 includes a filter body 110 and a resonant component 120.
[0039] The filter body 110 has a first accommodating cavity 111 . The resonant component 120 is disposed in the first accommodating cavity 111 .
[0040] Specifically, the resonant component 120 includes a first resonator 121 and a second resonator 122. The first resonator 121 includes a first coupling member 1212, and the second resonator 122 includes a second coupling member 1222. Capacitive coupling is generated between the first resonator 121 and the second resonator 122 through the first coupling member 1212 and the second coupling member 1222. In this embodiment, the negative zero point of the filter 100 is realized through the first coupling member 1212 and the second coupling member 1222, and the generation of second harmonics is avoided.
[0041] In the related art, in order to achieve the negative zero point in the metal filter, a flying rod and a flying rod seat are usually used, that is, the flying rod is fixed between the two resonant cavities through the flying rod seat, and a capacitive coupling is formed through the gap between the flying rod and the resonant rod, so as to achieve the negative zero point. However, due to the influence of the flying rod's own length and other factors, secondary harmonics will be generated at high frequencies. Generally, the clutter is suppressed by adding a low-pass filter, but the high-frequency filter adopts the flying rod structure, which will generate clutter at the near end of the channel, and the low-pass filter can no longer suppress the clutter, thereby interfering with the communication signal in the channel.
[0042] In the embodiment of the utility model, the filter 100 includes a filter body 110 and a resonant component 120. In this embodiment, the first coupling member 1212 and the second coupling member 1222 in the resonant component 120 generate capacitive coupling between the first resonator 121 and the second resonator 122, thereby realizing the negative zero point of the filter 100, and at the same time, no harmonics are generated at the high end, thereby avoiding the generation of secondary harmonics, improving the communication quality of the filter 100, and reducing the assembly cost.
[0043] Alternatively, if Figure 3 As shown, the filter body 110 further includes a bottom plate 112, wherein the resonant component 120 is fixedly connected to the bottom plate 112. Optionally, the resonant component 120 is connected to the bottom plate 112 of the filter body 110, for example, by bolts.
[0044] Alternatively, if Figure 2 and Figure 3 As shown, the filter body 110 has a first resonant cavity 1111 , a second resonant cavity 1112 and a third resonant cavity 1113 .
[0045] A first coupling window 113 is provided between the first resonant cavity 1111 and the second resonant cavity 1112, a second coupling window 114 is provided between the second resonant cavity 1112 and the third resonant cavity 1113, and a third coupling window 115 is provided between the first resonant cavity 1111 and the third resonant cavity 1113.
[0046] It should be noted that the first resonant cavity 1111 , the second resonant cavity 1112 , and the third resonant cavity 1113 are connected to form the first accommodating cavity 111 .
[0047] Optionally, the first resonator 121 is disposed in the first resonant cavity 1111, and the first resonator 121 is fixedly connected to the bottom plate 112. Optionally, the first resonator 121 is connected to the bottom plate 112, for example, by bolts.
[0048] Optionally, the second resonator 122 is disposed in the second resonant cavity 1112, and the second resonator 122 is fixedly connected to the bottom plate 112. Optionally, the second resonator 122 is connected to the bottom plate 112, for example, by bolts.
[0049] It should be noted that the first resonator 121 and the second resonator 122 form capacitive coupling in the first coupling window 113 through the first coupling member 1212 and the second coupling member 1222, thereby realizing the negative zero point of the filter 100 and avoiding the generation of the second harmonic.
[0050] Alternatively, if Figure 3 and Figure 4 As shown, the resonance component 120 further includes a third resonator 123 .
[0051] The third resonator 123 is disposed in the third resonant cavity 1113 , the third resonator 123 is coupled with the first resonator 121 through the third coupling window 115 , and the third resonator 123 is coupled with the second resonator 122 through the second coupling window 114 .
[0052] Optionally, the third resonator 123 includes a third resonant rod 1231, wherein the third resonant rod 1231 is disposed in the third resonant cavity 1113, and one end of the third resonant rod 1231 is fixedly connected to the bottom plate 112, and the fixed connection method is, for example, a bolt connection.
[0053] Alternatively, if Figure 3 and Figure 4 As shown, the first resonator 121 further includes a first resonant rod 1211, wherein the first resonant rod 1211 is disposed in the first resonant cavity 1111, and one end of the first resonant rod 1211 is fixedly connected to the bottom plate 112, and the fixed connection method is, for example, a bolt connection.
[0054] Specifically, the first coupling member 1212 is disposed at an end of the first resonant rod 1211 away from the bottom plate 112 , and the first coupling member 1212 is located at a side of the first resonant rod 1211 close to the second resonator 122 .
[0055] The first coupling member 1212 is fixedly connected to the first resonant rod 1211 , and the fixed connection method is, for example, welding or integral molding. In this embodiment, the first coupling member 1212 is used to generate capacitive coupling between the first resonator 121 and the second resonator 122 .
[0056] Alternatively, if Figure 5As shown, the first coupling member 1212 includes a first connecting rod 1212a and a first coupling piece 1212b.
[0057] The first connecting rod 1212a is disposed at an end of the first resonant rod 1211 away from the first resonant rod 1211, and the first connecting rod 1212a is fixedly connected to the first resonant rod 1211, and the fixed connection method is, for example, welding or integral molding.
[0058] In addition, the first coupling plate 1212b is disposed at one end of the first connecting rod 1212a close to the second resonator 122, and the first coupling plate 1212b is fixedly connected to the first connecting rod 1212a, and the connection method is, for example, welding.
[0059] In this embodiment, the first coupling plate 1212b is used to generate capacitive coupling between the first resonator 121 and the second resonator 122, thereby realizing the negative zero point of the filter 100, and at the same time, no second harmonic is generated, thereby improving the communication quality.
[0060] Alternatively, if Figure 3 and Figure 4 As shown, the second resonator 122 further includes a second resonant rod 1221, which is disposed in the second resonant cavity 1112, and the second resonant rod 1221 is fixedly connected to the bottom plate 112, and the fixed connection method is, for example, bolt connection.
[0061] Specifically, the second coupling member 1222 is disposed at one end of the second resonant rod 1221 away from the bottom plate 112 , and the second coupling member 1222 is fixedly connected to the second resonant rod 1221 , and the fixed connection manner is, for example, welding or integral molding.
[0062] It should be noted that the second coupling member 1222 is arranged corresponding to the first coupling member 1212 .
[0063] Alternatively, if Figure 5 As shown, the second coupling member 1222 includes a second connecting rod 1222a, which is arranged at an end of the second resonant rod 1221 away from the bottom plate 112, and the second connecting rod 1222a is located on a side of the second resonant rod 1221 close to the first resonator 121, and the second connecting rod 1222a is fixedly connected to the second resonant rod 1221.
[0064] Optionally, the second connecting rod 1222a and the second resonant rod 1221 are, for example, welded or integrally formed.
[0065] Optionally, the second coupling member 1222 further includes a second coupling plate 1222b, wherein the second coupling plate 1222b is arranged at an end of the second connecting rod 1222a close to the first resonator 121, and the second coupling plate 1222b is fixedly connected to the second connecting rod 1222a at one side close to the second connecting rod 1222a, and the fixed connection method is, for example, welding or integral molding.
[0066] It should be noted that the second coupling plate 1222b is disposed corresponding to the first coupling plate 1212b and close to each other, so that the first coupling plate 1212b and the second coupling plate 1222b form a capacitor structure.
[0067] In this embodiment, capacitive coupling is formed between the first resonator 121 and the second resonator 122 through the first coupling plate 1212b and the second coupling plate 1222b, thereby realizing the negative zero point of the filter 100 and avoiding the generation of second harmonics, thereby improving the communication quality of the filter 100 and reducing the assembly cost.
[0068] This embodiment provides a communication device, which has the filter 100 described in any of the above embodiments, and thus has all the beneficial effects of the filter 100, which will not be described in detail here.
[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0070] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A filter, characterized in that: include: A filter body, wherein the filter body has a first accommodating cavity; A resonance component, wherein the resonance component is arranged in the first accommodating cavity, the resonance component includes a first resonator and a second resonator, and the first resonator includes a first coupling member, the second resonator includes a second coupling member, a capacitive coupling is formed between the first resonator and the second resonator through the first coupling member and the second coupling member, and the first coupling member and the second coupling member are used to realize the negative zero point of the filter and avoid the generation of second harmonics.
2. The filter according to claim 1, characterized in that The filter body also includes a bottom plate, and the resonant component is fixedly connected to the bottom plate.
3. The filter according to claim 2, characterized in that The filter body comprises a first resonant cavity, a second resonant cavity and a third resonant cavity, a first coupling window is arranged between the first resonant cavity and the second resonant cavity, a second coupling window is arranged between the second resonant cavity and the third resonant cavity, a third coupling window is arranged between the first resonant cavity and the third resonant cavity, and the first resonant cavity, the second resonant cavity and the third resonant cavity are connected to form the first accommodating cavity.
4. The filter according to claim 3, characterized in that The first resonator is arranged in the first resonant cavity, and the first resonator is fixedly connected to the bottom plate; The second resonator is arranged in the second resonant cavity, and the second resonator is fixedly connected to the bottom plate; The resonant component further includes a third resonator, which is disposed in the third resonant cavity, the third resonator is coupled to the first resonator through the third coupling window, and the third resonator is coupled to the second resonator through the second coupling window.
5. The filter according to claim 4, characterized in that The first resonator further comprises a first resonant rod, the first resonant rod is arranged in the first resonant cavity, and one end of the first resonant rod is fixedly connected to the bottom plate; The first coupling member is arranged at an end of the first resonant rod away from the bottom plate, and the first coupling member is located at a side of the first resonant rod close to the second resonator. The first coupling member is used to generate capacitive coupling between the first resonator and the second resonator.
6. The filter according to claim 5, characterized in that The first coupling member comprises: A first connecting rod, the first connecting rod is arranged at an end of the first resonant rod away from the first resonant rod, and the first connecting rod is fixedly connected to the first resonant rod; A first coupling plate is provided at one end of the first connecting rod close to the second resonator, and the first coupling plate is used for capacitively coupling the first resonator and the second resonator.
7. The filter according to claim 6, characterized in that The second resonator further comprises a second resonant rod, the second resonant rod is arranged in the second resonant cavity, and the second resonant rod is fixedly connected to the bottom plate; The second coupling member is arranged at an end of the second resonant rod away from the bottom plate, the second coupling member is fixedly connected to the second resonant rod, and the second coupling member is arranged corresponding to the first coupling member.
8. The filter according to claim 7, characterized in that The second coupling member includes a second connecting rod, which is arranged at an end of the second resonant rod away from the bottom plate, is located on a side of the second resonant rod close to the first resonator, and is fixedly connected to the second resonant rod.
9. The filter according to claim 8, characterized in that The second coupling member also includes a second coupling plate, which is arranged at one end of the second connecting rod close to the first resonator, the second coupling plate is fixedly connected to the second connecting rod, the second coupling plate is arranged corresponding to the first coupling plate, the first coupling plate and the second coupling plate form a capacitor structure, and the first resonator and the second resonator form a capacitive coupling through the first coupling plate and the second coupling plate.
10. A communication device, characterized in that: A filter comprising the filter according to any one of claims 1 to 9.