CN218513663U - Cavity filter - Google Patents
Cavity filter Download PDFInfo
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- CN218513663U CN218513663U CN202222425393.3U CN202222425393U CN218513663U CN 218513663 U CN218513663 U CN 218513663U CN 202222425393 U CN202222425393 U CN 202222425393U CN 218513663 U CN218513663 U CN 218513663U
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Abstract
The utility model discloses a cavity filter, include: resonant cavity, input-output connector, a plurality of resonance post and a plurality of tuning screw, wherein: the input and output connectors are respectively arranged on two wide side sides of the resonant cavity and connected with the resonant columns arranged in the resonant cavity; a hollow-out area is arranged inside the resonance column, and the tuning screw is inserted into the hollow-out area inside the resonance column; according to the position sequence of the resonance columns, the resonance columns in the middle are used as middle points to divide the distribution of the resonance columns into two sides, and the distance between the adjacent resonance columns in the distribution of the resonance columns on one side is respectively symmetrical to the distance between the adjacent resonance columns in the distribution of the resonance columns on the other side. By adopting the technical scheme, the size of the cavity filter is reduced, the structure is simplified, and meanwhile, a good filtering effect is realized.
Description
Technical Field
The utility model relates to a wave filter technical field especially relates to a cavity filter.
Background
With the development of semiconductor and microwave technologies and the limitation of frequency resources, more and more frequency resources are utilized, thereby causing mutual interference between microwave devices, and thus causing a series of problems. Electromagnetic compatibility tests and electromagnetic compatibility requirements have therefore been proposed, and microwave amplifiers are generally designed with filters to address such problems.
The filter has various types, such as an LC filter, a dielectric filter, a cavity filter, a microstrip filter, a waveguide filter, etc., wherein the cavity filter can be applied to a situation with larger power, so the application range of the cavity filter is theoretically wider than that of other types of filters, but if the cavity filter needs to achieve a better filtering effect, a loading capacitor is added, a tap effect is avoided, etc., the overall size of the cavity filter is inevitably larger, and thus the cavity filter is difficult to be widely applied.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model provides a cavity filter, which utilizes the hollow structure inside the resonant column, and inserts the hollow inside the resonant column through a tuning screw, thereby increasing the contact area between the resonant column and the resonant column, increasing the loading capacitance and further reducing the size of the cavity filter; furthermore, two adjacent resonance columns on two wide sides of the resonant cavity are not as high as other resonance columns, so that the tap effect is reduced, and the size of the cavity filter is further reduced.
The technical scheme is as follows: the utility model relates to a cavity filter, include: resonant cavity, input/output connector, a plurality of resonance post and a plurality of tuning screw, wherein: the input and output connectors are respectively arranged on two wide side sides of the resonant cavity and are connected with the resonant column arranged in the resonant cavity; a hollowed-out area is arranged inside the resonance column, and the tuning screw is inserted into the hollowed-out area inside the resonance column; according to the position sequence of the resonance columns, the resonance column in the middle is taken as a middle point to divide the distribution of the resonance columns into two sides, the distance between the adjacent resonance columns in the distribution of the resonance columns on one side is distributed symmetrically with the distance between the adjacent resonance columns in the distribution of the resonance columns on the other side; the distance between the two resonance columns arranged at intervals and the same long side of the resonant cavity is equal, and the distance between the two adjacent resonance columns and the same long side of the resonant cavity is unequal.
Specifically, the heights of two adjacent resonant columns on two wide sides of the resonant cavity are different from the heights of other resonant columns.
Specifically, the heights of two adjacent resonant columns on two wide sides of the resonant cavity are 13mm to 14.5mm, and the heights of other resonant columns are 10mm to 11mm.
Specifically, the heights of two adjacent resonant columns on two wide sides of the resonant cavity are 13.75mm, and the heights of other resonant columns are 10.46mm.
Specifically, the length of the tuning screw corresponding to two adjacent resonance columns on two broad sides of the resonant cavity is 2mm to 3mm.
Specifically, the length of the tuning screw corresponding to two adjacent resonance columns on two wide sides of the resonant cavity is 2.43mm.
Specifically, the insertion depth of the tuning screws corresponding to two adjacent resonance columns on two wide sides of the resonant cavity is 0.04mm to 0.12mm.
Specifically, the insertion depth of tuning screws corresponding to two adjacent resonance columns on two wide sides of the resonant cavity is 0.08mm.
Specifically, the input/output connector is coupled and connected with two adjacent resonant columns on two wide sides of the resonant cavity through conductors.
Specifically, the number of the resonance columns is 7.
Has the advantages that: compared with the prior art, the utility model has the advantages of it is as follows showing: the size of the cavity filter is reduced, the structure is simplified, and meanwhile, a good filtering effect is achieved.
Drawings
Fig. 1 is a schematic diagram of an internal structure of a cavity filter provided by the present invention;
fig. 2 is an overall schematic diagram of the cavity filter provided by the present invention;
fig. 3 is a schematic structural diagram of a pair of resonant posts and tuning screws provided by the present invention;
1-a resonant cavity; 2-a resonant column; 3-a tuning screw; 4. 5-input/output connector.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings.
See fig. 1, 2 and 3.
The utility model provides a cavity filter, include: a resonator 1, input-output connectors (4, 5), a plurality of resonant columns 2 and a plurality of tuning screws 3, wherein: the input and output connectors are respectively arranged on two wide side sides of the resonant cavity 1 and connected with the resonant column 2 arranged in the resonant cavity 1; a hollow area is arranged inside the resonance column 2, and the tuning screw 3 is inserted into the hollow area inside the resonance column 2; according to the position sequence of the resonance columns 2, the resonance columns 2 in the middle are taken as the middle points to divide the distribution of the resonance columns 2 into two sides, and the distance distribution between the adjacent resonance columns 2 in the distribution of the resonance columns 2 on one side is respectively symmetrical to the distance distribution between the adjacent resonance columns 2 in the distribution of the resonance columns 2 on the other side; the distance between the two resonance columns 2 arranged at intervals and the same long side of the resonant cavity 1 is equal, and the distance between the two adjacent resonance columns 2 and the same long side of the resonant cavity 1 is unequal.
In specific implementation, the hollow-out area is arranged inside the resonance column 2, further, the resonance column 2 can be of an axial hollow structure, and after the tuning screw 3 is inserted into the resonance column 2, the contact area between the resonance column 2 and the tuning screw 3 is increased, and then the loading capacitance of the cavity filter is increased.
The embodiment of the utility model provides an in, the quantity of resonance post 2 is the odd number, and under the preferred circumstances, quantity can be for 7, under the condition that reaches the filtering effect of ideal, reduces the size of wave filter, simplifies the structure.
In the specific implementation, the distance between the first left resonant column 2 and the left wide side of the resonant cavity 1 is L 01 The distance between the ith and (i + 1) th resonant columns 2 (counted from the left side) is L ii+1 The resonant column 2 is arranged in the resonant cavity 1 according to L 01 ＝L 70 、L 12 ＝L 67 、L 23 ＝L 56 、L 34 ＝L 45 (L 70 The first resonator column 2 on the right side is spaced from the right side of the resonator 1) are staggered and symmetrically distributed within the resonator 1.
In a specific implementation, the distance between the resonant columns 2 can be calculated according to the distance between the planes of two adjacent vertical surfaces facing each other of the two resonant columns 2.
In specific implementation, the distance between two resonance columns 2 arranged at intervals and the same long side of the resonant cavity 1 is equal, that is, one resonance column 2 (for example, the first resonance column 2 on the left side and the third resonance column 2 on the left side) is arranged at the middle interval, the distance between two adjacent resonance columns 2 and the same long side of the resonant cavity 1 is unequal, and the distance between two adjacent resonance columns 2 and the same long side of different resonant cavities 1 is equal, so that the staggered position arrangement of the resonance columns 2 is formed, and the filtering effect is improved.
In a specific implementation, the input/output connectors (4, 5) may be divided into an input connector 4 and an output connector 5, the input connector 4 is disposed on one wide side of the resonant cavity 1, and the output connector 5 is disposed on the other wide side of the resonant cavity 1.
In the embodiment of the utility model, input/output connector (4, 5) pass through the conductor respectively with two adjacent 2 coupled connection of resonance post of 1 two wide avris of resonant cavity.
In a specific implementation, the axial insertion direction of the tuning screws 3 is opposite for two adjacent resonant columns 2.
The embodiment of the utility model provides an in, the height of two adjacent resonance posts 2 of two wide avris of resonant cavity 1, with the high difference of other resonance posts 2.
In the specific implementation, in order to reduce the size of the filter, the input and output connectors are coupled with the resonant columns 2 through conductors, but a tap effect is generated due to the coupling, and in order to reduce the tap effect, the heights of two adjacent resonant columns 2 on two wide sides of the resonant cavity 1 are set to be different from the heights of other resonant columns 2, so that the tap effect is reduced.
In the embodiment of the utility model, in order to reach better filtering effect, the height of two adjacent resonance post 2 of two wide avris of resonant cavity 1 is 13mm to 14.5mm, and the height of other resonance post 2 is 10mm to 11mm.
The embodiment of the utility model provides an in order to reach better filtering effect, two adjacent resonance post 2 of 1 two wide avris of resonant cavity highly be 13.75mm, other resonance post 2 highly be 10.46mm.
The embodiment of the utility model provides an in, in order to reach better filtering effect, the tuning screw 3 lengths that 1 two adjacent 2 corresponding resonance posts of wide avris of resonant cavity are 2mm to 3mm.
The embodiment of the utility model provides an in, in order to reach better filtering effect, the tuning screw 3 length 2.43mm that two adjacent resonance posts 2 of 1 two wide avris of resonant cavity correspond.
In the embodiment of the utility model, in order to reach better filtering effect, the tuning screw 3 that two adjacent resonance post 2 of two wide avris of resonant cavity 1 correspond, the male degree of depth is 0.04mm to 0.12mm.
The embodiment of the utility model provides an in order to reach better filtering effect, the tuning screw 3 that two adjacent resonance posts 2 of 1 two wide avris of resonant cavity correspond, and the male degree of depth is 0.08mm.
In the specific implementation, two adjacent resonance columns 2 on two wide sides of the resonant cavity 1 refer to the leftmost and rightmost resonance columns 2 in the resonant cavity 1, and the other resonance columns 2 refer to the middle part of the resonance column 2 except for the leftmost and rightmost resonance columns 2.
In specific implementation, the structure and the size provided by the embodiment of the present invention are applied to obtain the simulation result of the filter in table 1 below.
Table 1:
can find out in table 1, use the embodiment of the utility model provides a structure and size, cavity filter insertion loss are within 0.1dB, and left side and right side both ends mouth return loss all are below-20 dB, and possess good outband suppression and 2 harmonic suppression, traditional cavity filter size: length is multiplied by width by height =35.9mm by 28.5mm by 8.1mm, uses the embodiment of the utility model provides a structure and size, cavity filter overall dimension: length × width × height =26.2mm × 16.1mm × 6.3mm, which is about 67% smaller than a conventional cavity filter.
Claims (10)
1. A cavity filter, comprising: resonant cavity, input-output connector, a plurality of resonance post and a plurality of tuning screw, wherein:
the input and output connectors are respectively arranged on two wide side sides of the resonant cavity and are connected with the resonant column arranged in the resonant cavity;
a hollow-out area is arranged inside the resonance column, and the tuning screw is inserted into the hollow-out area inside the resonance column;
according to the position sequence of the resonance columns, the resonance column in the middle is taken as a middle point to divide the distribution of the resonance columns into two sides, the distance between the adjacent resonance columns in the distribution of the resonance columns on one side is distributed symmetrically with the distance between the adjacent resonance columns in the distribution of the resonance columns on the other side;
the distance between the two resonance columns arranged at intervals and the same long side of the resonant cavity is equal, and the distance between the two adjacent resonance columns and the same long side of the resonant cavity is unequal.
2. The cavity filter according to claim 1, wherein the heights of two resonant columns adjacent to both broad sides of the resonant cavity are different from the heights of other resonant columns.
3. The cavity filter of claim 2, wherein the heights of two adjacent resonant columns on two wide sides of the resonant cavity are 13mm to 14.5mm, and the heights of the other resonant columns are 10mm to 11mm.
4. The cavity filter according to claim 3, wherein the heights of two adjacent resonant columns on both broad sides of the resonant cavity are 13.75mm, and the heights of the other resonant columns are 10.46mm.
5. The cavity filter of claim 3, wherein the tuning screws corresponding to two adjacent resonator columns on two broad sides of the resonator cavity have a length of 2mm to 3mm.
6. The cavity filter according to claim 5, wherein the tuning screws corresponding to two adjacent resonator posts on both broad sides of the resonator cavity have a length of 2.43mm.
7. The cavity filter of claim 5, wherein the tuning screws of two adjacent resonator columns on two broad sides of the resonator cavity are inserted to a depth of 0.04mm to 0.12mm.
8. The cavity filter according to claim 7, wherein the tuning screws corresponding to two adjacent resonator posts on two broad sides of the resonator cavity are inserted to a depth of 0.08mm.
9. The cavity filter of claim 8, wherein the input/output connector is coupled to two adjacent resonator columns on two broad sides of the resonator cavity by a conductor.
10. The cavity filter of claim 1, wherein the number of resonant columns is 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222425393.3U CN218513663U (en) | 2022-09-14 | 2022-09-14 | Cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222425393.3U CN218513663U (en) | 2022-09-14 | 2022-09-14 | Cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218513663U true CN218513663U (en) | 2023-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222425393.3U Active CN218513663U (en) | 2022-09-14 | 2022-09-14 | Cavity filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218513663U (en) |
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2022
- 2022-09-14 CN CN202222425393.3U patent/CN218513663U/en active Active
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