CN209804861U - Interdigital band-stop filter - Google Patents
Interdigital band-stop filter Download PDFInfo
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- CN209804861U CN209804861U CN201920410106.7U CN201920410106U CN209804861U CN 209804861 U CN209804861 U CN 209804861U CN 201920410106 U CN201920410106 U CN 201920410106U CN 209804861 U CN209804861 U CN 209804861U
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- stop
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- 239000002184 metal Substances 0.000 claims description 4
- 230000008030 elimination Effects 0.000 abstract description 17
- 238000003379 elimination reaction Methods 0.000 abstract description 17
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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Abstract
The utility model is suitable for a cavity filter technical field provides an interdigital band elimination filter, including cavity structures, two at least stop band resonance units and two at least passband resonance units, the passband resonance unit is arranged and is fixed first horizontal plane in the cavity structures, the stop band resonance unit is arranged and is fixed second horizontal plane in the cavity structures, and two at least stop band resonance unit and two at least the passband resonance unit is the crisscross distribution of pectination in the vertical direction. Therefore, the utility model discloses simple structure, simple to operate can effectively reduce band elimination filter's volume.
Description
Technical Field
The utility model relates to a cavity filter technical field especially relates to an interdigital band elimination filter.
Background
With the rapid development of wireless mobile communication technology, filters are widely used as an important component in modern wireless communication systems. In the prior art, resonators in a band-stop filter are usually arranged in a long strip shape, that is, a plurality of resonators are distributed in a straight shape, and when the number of the resonators is large, the whole length of the band-stop filter is long, so that the miniaturization of the filter is not facilitated.
As can be seen from the above, the conventional band-stop filter has many problems in practical use, and therefore, it is necessary to improve the band-stop filter.
SUMMERY OF THE UTILITY MODEL
To foretell defect, the utility model aims to provide an interdigital band elimination filter, simple structure, simple to operate can effectively reduce band elimination filter's volume.
In order to achieve the above object, the utility model provides an interdigital band elimination filter, including cavity structures, two at least stop band resonance units and two at least band resonance units, the pass band resonance unit is arranged and is fixed first horizontal plane in the cavity structures, the stop band resonance unit is arranged and is fixed second horizontal plane in the cavity structures, and two at least stop band resonance unit and two at least the pass band resonance unit is the crisscross distribution of pectination in the vertical direction.
The interdigital band-stop filter also comprises at least one stop band adjustable unit, wherein the stop band adjustable unit is fixed on the surface of the cavity structure, and the at least one stop band adjustable unit and the at least two stop band resonant units are distributed in a comb-shaped staggered manner in the vertical direction.
According to the interdigital band elimination filter, the second horizontal plane is positioned between the first horizontal plane and the stop band adjustable unit.
The interdigital band elimination filter comprises eight passband resonance units, four stopband resonance units and six stopband resonance units.
According to the interdigital band elimination filter, the cavity structure is provided with an input port and an output port which extend outwards, and the input port and the output port are respectively connected with the two passband resonance units which are arranged end to end.
According to the interdigital band-stop filter, the cavity structure is of a rectangular structure, and the stop band resonant unit and the pass band resonant unit are of strip-shaped blocks.
According to the interdigital band elimination filter, the cavity structure is a metal structure.
Interdigital band elimination filter including cavity structures, two at least stop band resonance units and two at least passband resonance units, the passband resonance unit is arranged and is fixed first horizontal plane in the cavity structures, the stop band resonance unit is arranged and is fixed second horizontal plane in the cavity structures, and at least two stop band resonance unit and two at least the passband resonance unit is the crisscross distribution of pectination in the vertical direction. Therefore, the utility model discloses simple structure, simple to operate can effectively reduce band elimination filter's volume.
Drawings
Fig. 1 is a perspective view of an interdigital band stop filter according to a preferred embodiment of the present invention;
Fig. 2 is a top perspective view of an interdigital band stop filter according to the present invention;
Fig. 3 is a side perspective view of an interdigital band stop filter according to the present invention;
Fig. 4 is a schematic diagram of the internal assembly of the interdigital band stop filter according to the preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
fig. 1-4 show that preferred embodiment interdigital band elimination filter, including cavity structures 6, two at least stop band resonance unit 2 and two at least band-pass resonance unit 3, pass band resonance unit 3 arranges and fixes the first horizontal plane in cavity structures 6 inside, stop band resonance unit 2 arranges and fixes the second horizontal plane in cavity structures 6, and two at least stop band resonance unit 2 and two at least band-pass resonance unit 3 are pectinate staggered distribution in the vertical direction. This embodiment is including eight passband resonance unit 3 and four stop band resonance unit 2, wherein first horizontal plane is under the second horizontal plane, and eight passband resonance unit 3 interval arrangement on first horizontal plane, four stop band resonance unit 2 interval arrangement on the second horizontal plane, and stop band resonance unit 2 one-to-one with four clearances between passband resonance unit 3, four stop band resonance unit 2 and eight passband resonance unit 3 are comb structure promptly, adopt the realization of comb interdigital structure, can play the effect of reducing the filter structure size. The function of a band elimination filter can be realized by adjusting the size of the comb-shaped structure; more convenient and flexible, the coupling quantity can be adjusted more flexibly by adjusting the installation size and the structural length of the comb-shaped structure so as to meet the electrical performance requirements of different stop bands.
The tunable filter further comprises at least one stop band tunable unit 1, wherein the stop band tunable unit 1 is fixed on the surface of the cavity structure 6, and the at least one stop band tunable unit 1 and the at least two stop band resonant units 2 are distributed in a comb-like staggered manner in the vertical direction. The second level of this embodiment is between the first level and the stop band adjustable unit 1. The stop band adjustable unit 1 is added in the structural space of the stop band resonance unit 2 corresponding to the cavity structure 6, so that the tolerance of processing and assembly can be made up, the debugging of the interdigital band-stop filter is simplified, and the producibility is improved.
Preferably, six stop band adjustable units 1 are included, and every three stop band adjustable units 1 are set as a group, and the two groups of stop band adjustable units 1 and the four stop band resonant units 2 of the present embodiment are distributed in a comb-like staggered manner in the vertical direction.
The cavity structure 6 is also provided with an input port 4 and an output port 5 which extend outwards, and the input port 4 and the output port 5 are respectively connected with the two passband resonance units 3 which are arranged end to end; the input port 4 and the output port 5 extend outward.
The cavity structure 6 of this embodiment is a rectangular structure, and the stop band resonance unit 2 and the pass band resonance unit 3 are bar-shaped blocks. And the cavity structure 6 is a metal structure, that is, the filter is a conventional metal interdigital filter, and of course, the filter can also be applied to an interdigital filter comprising a dielectric resonator.
To sum up, interdigital band elimination filter including cavity structures, two at least stop band resonance units and two at least passband resonance units, the passband resonance unit is arranged and is fixed first horizontal plane in the cavity structures, the stop band resonance unit is arranged and is fixed second horizontal plane in the cavity structures, and at least two stop band resonance unit and two at least the passband resonance unit is the crisscross distribution of pectination in the vertical direction. Therefore, the utility model discloses simple structure, simple to operate can effectively reduce band elimination filter's volume, have solved the problem of prior art's band elimination filter structure and volume.
Naturally, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and it is intended that all such changes and modifications be considered as within the scope of the appended claims.
Claims (7)
1. The interdigital band-stop filter is characterized by comprising a cavity structure, at least two stop band resonant units and at least two passband resonant units, wherein the passband resonant units are arranged and fixed on a first horizontal plane in the cavity structure, the stop band resonant units are arranged and fixed on a second horizontal plane in the cavity structure, and at least two stop band resonant units and at least two passband resonant units are distributed in a comb-shaped staggered manner in the vertical direction.
2. The interdigital band-stop filter according to claim 1, further comprising at least one stopband tunable element fixed on the surface of the cavity, wherein the at least one stopband tunable element and at least two stopband resonant elements are disposed in a comb-like staggered manner in a vertical direction.
3. the interdigital band reject filter of claim 2, wherein the second level is between the first level and the stop band tunable element.
4. the interdigital band reject filter of claim 2, comprising eight of the passband resonant cells, four of the stopband resonant cells, and six of the stopband resonant cells.
5. The interdigital band reject filter according to claim 1, wherein the cavity structure is provided with an input port and an output port extending outwardly, and the input port and the output port are respectively connected with two of the passband resonance units arranged end to end.
6. The interdigital band reject filter of claim 1, wherein the cavity structure has a rectangular structure, and the stopband resonant units and the passband resonant units have a bar-shaped block shape.
7. The interdigital band reject filter of claim 1, wherein the cavity structure is a metal structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920410106.7U CN209804861U (en) | 2019-03-28 | 2019-03-28 | Interdigital band-stop filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920410106.7U CN209804861U (en) | 2019-03-28 | 2019-03-28 | Interdigital band-stop filter |
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| Publication Number | Publication Date |
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| CN209804861U true CN209804861U (en) | 2019-12-17 |
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| CN201920410106.7U Active CN209804861U (en) | 2019-03-28 | 2019-03-28 | Interdigital band-stop filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113394571A (en) * | 2021-07-20 | 2021-09-14 | 合肥工业大学 | Interdigital stepped resonance structure and wave absorber of low-frequency electromagnetic wave |
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2019
- 2019-03-28 CN CN201920410106.7U patent/CN209804861U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113394571A (en) * | 2021-07-20 | 2021-09-14 | 合肥工业大学 | Interdigital stepped resonance structure and wave absorber of low-frequency electromagnetic wave |
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