CN211743354U - Novel dielectric waveguide filter - Google Patents
Novel dielectric waveguide filter Download PDFInfo
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- CN211743354U CN211743354U CN202020283660.6U CN202020283660U CN211743354U CN 211743354 U CN211743354 U CN 211743354U CN 202020283660 U CN202020283660 U CN 202020283660U CN 211743354 U CN211743354 U CN 211743354U
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- waveguide filter
- capacitive coupling
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Abstract
The utility model relates to the technical field of filters, in particular to a novel dielectric waveguide filter, which can realize the capacitive cross coupling of the dielectric waveguide filter by arranging a first capacitive coupling hole between two first resonant cavities and a second capacitive coupling hole between two second resonant cavities, so that the dielectric waveguide filter realizes 4 transmission zero points in a limited space, thereby being beneficial to improving the performance of the dielectric waveguide filter and flexibly allocating the out-of-band rejection performance so as to realize the dielectric waveguide filter with high selectivity; compared with the prior art, the manufacturing process is simplified, the production is easy, the volume of the dielectric waveguide filter cannot be increased, and the miniaturization of the dielectric waveguide filter can be ensured; the dielectric waveguide filter designed by the scheme simultaneously considers the convenience of later debugging, so that the debugging performance is easier to converge, and the debugging time is saved.
Description
Technical Field
The utility model relates to a wave filter technical field, in particular to novel dielectric waveguide wave filter.
Background
In 3G and 4G communication era, the choice of the base station filter is mainly the metal coaxial cavity filter, in recent years, with the high-speed development of the communication industry, the 5G communication era has been forthcoming, and a core technology of the 5G communication is Massive MIMO (large-scale antenna technology), but is limited by the requirement of Massive MIMO on large-scale antenna integration, the filter needs to be more miniaturized and integrated, the traditional metal coaxial cavity filter cannot meet the design requirement, and the ceramic dielectric waveguide filter has the advantages of high Q value, good frequency selection characteristic, good working frequency stability, small insertion loss, small size and the like, so the ceramic dielectric waveguide filter is expected to become the mainstream choice in the 5G era.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to solve the technical problems that: a novel dielectric waveguide filter is provided.
In order to solve the technical problem, the utility model discloses a technical scheme be:
the utility model provides a novel dielectric waveguide filter, includes the medium body, be equipped with two first resonant cavity, two second resonant cavity, two third resonant cavity and inductive coupling hole on the side of medium body, two be equipped with first capacitive coupling hole between the first resonant cavity, two be equipped with second capacitive coupling hole between the second resonant cavity, the inductive coupling hole is located between first capacitive coupling hole and the second capacitive coupling hole.
Furthermore, the first capacitive coupling hole and the second capacitive coupling hole are both blind holes, and the depth of the first capacitive coupling hole is greater than that of the second capacitive coupling hole.
Furthermore, a third capacitive coupling hole is formed in the other side face, opposite to the one side face, of the medium body, the third capacitive coupling hole is opposite to the second capacitive coupling hole, and the structure of the third capacitive coupling hole is the same as that of the second capacitive coupling hole.
Further, be equipped with two signal holes on the opposite another side of a side of medium body, two the signal hole sets up and the center pin of signal hole and the center pin of the first resonant cavity who corresponds rather than on same straight line with two first resonant cavity one-to-ones respectively, first resonant cavity and signal hole are the blind hole, first resonant cavity's aperture is greater than the aperture of signal hole.
Furthermore, the inductive coupling hole is a through hole, and the horizontal section of the inductive coupling hole is in a cross shape.
Furthermore, the first resonant cavity, the second resonant cavity and the third resonant cavity are all the same in structure and are blind holes.
The beneficial effects of the utility model reside in that:
the first capacitive coupling hole is formed between the two first resonant cavities, and the second capacitive coupling hole is formed between the two second resonant cavities, so that capacitive cross coupling of the dielectric waveguide filter can be realized, 4 transmission zeros of the dielectric waveguide filter can be realized in a limited space, the performance of the dielectric waveguide filter can be improved, the out-of-band rejection performance can be flexibly adjusted, and the high-selectivity dielectric waveguide filter can be realized; compared with the prior art, the manufacturing process is simplified, the production is easy, the volume of the dielectric waveguide filter cannot be increased, and the miniaturization of the dielectric waveguide filter can be ensured; the dielectric waveguide filter designed by the scheme simultaneously considers the convenience of later debugging, so that the debugging performance is easier to converge, and the debugging time is saved.
Drawings
Fig. 1 is a schematic structural diagram of a novel dielectric waveguide filter according to the present invention;
fig. 2 is a schematic structural diagram of a novel dielectric waveguide filter according to the present invention;
fig. 3 is a schematic structural diagram of a novel dielectric waveguide filter according to the present invention;
fig. 4 is a schematic top view of a novel dielectric waveguide filter according to the present invention;
fig. 5 is a schematic top view of a novel dielectric waveguide filter according to the present invention;
description of reference numerals:
1. a dielectric body; 2. a first resonant cavity; 3. a second resonant cavity; 4. a third resonant cavity; 5. an inductive coupling aperture; 6. a first capacitive coupling hole; 7. a second capacitive coupling aperture; 8. a third capacitive coupling hole; 9. a signal aperture.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, the technical solution provided by the present invention is:
the utility model provides a novel dielectric waveguide filter, includes the medium body, be equipped with two first resonant cavity, two second resonant cavity, two third resonant cavity and inductive coupling hole on the side of medium body, two be equipped with first capacitive coupling hole between the first resonant cavity, two be equipped with second capacitive coupling hole between the second resonant cavity, the inductive coupling hole is located between first capacitive coupling hole and the second capacitive coupling hole.
From the above description, the beneficial effects of the present invention are:
the first capacitive coupling hole is formed between the two first resonant cavities, and the second capacitive coupling hole is formed between the two second resonant cavities, so that capacitive cross coupling of the dielectric waveguide filter can be realized, 4 transmission zeros of the dielectric waveguide filter can be realized in a limited space, the performance of the dielectric waveguide filter can be improved, the out-of-band rejection performance can be flexibly adjusted, and the high-selectivity dielectric waveguide filter can be realized; compared with the prior art, the manufacturing process is simplified, the production is easy, the volume of the dielectric waveguide filter cannot be increased, and the miniaturization of the dielectric waveguide filter can be ensured; the dielectric waveguide filter designed by the scheme simultaneously considers the convenience of later debugging, so that the debugging performance is easier to converge, and the debugging time is saved.
Furthermore, the first capacitive coupling hole and the second capacitive coupling hole are both blind holes, and the depth of the first capacitive coupling hole is greater than that of the second capacitive coupling hole.
It can be known from the above description that the first capacitive coupling hole and the second capacitive coupling hole are both blind holes, and the hole depth of the first capacitive coupling hole is greater than that of the second capacitive coupling hole, so that out-of-band rejection can be improved, and the influence on other communication frequency bands is reduced.
Furthermore, a third capacitive coupling hole is formed in the other side face, opposite to the one side face, of the medium body, the third capacitive coupling hole is opposite to the second capacitive coupling hole, and the structure of the third capacitive coupling hole is the same as that of the second capacitive coupling hole.
As can be seen from the above description, the third capacitive coupling hole and the second capacitive coupling hole form a capacitive coupling structure, and a double-sided hole structure is adopted, so that the depth of the hole can be effectively reduced, the size of the hole can be controlled, the overall performance is not affected, the capacitive cross coupling of the dielectric waveguide filter can be further realized, and the high-selectivity dielectric waveguide filter can be realized by adjusting the coupling amount between the cavities.
Further, be equipped with two signal holes on the opposite another side of a side of medium body, two the signal hole sets up and the center pin of signal hole and the center pin of the first resonant cavity who corresponds rather than on same straight line with two first resonant cavity one-to-ones respectively, first resonant cavity and signal hole are the blind hole, first resonant cavity's aperture is greater than the aperture of signal hole.
From the above description, it can be known that, by providing two signal holes on the other side surface opposite to the one side surface of the dielectric body, the signal holes are arranged corresponding to the first resonant cavity, and the signal holes are used as feed points for signal input and output, so that stable input and output of signals can be ensured, and stability of the working frequency of the dielectric waveguide filter can be ensured.
Furthermore, the inductive coupling hole is a through hole, and the horizontal section of the inductive coupling hole is in a cross shape.
It can be known from the above description that the inductive coupling hole is a through hole, and the horizontal cross section of the inductive coupling hole is cross-shaped, so that the inductive coupling amount between the cavities can be adjusted.
Furthermore, the first resonant cavity, the second resonant cavity and the third resonant cavity are all the same in structure and are blind holes.
Referring to fig. 1 to 5, a first embodiment of the present invention is:
referring to fig. 1, 2 and 4, a novel dielectric waveguide filter includes a dielectric body 1, two first resonant cavities 2, two second resonant cavities 3, two third resonant cavities 4 and an inductive coupling hole 5 are disposed on one side surface of the dielectric body 1, a first capacitive coupling hole 6 is disposed between the two first resonant cavities 2, a second capacitive coupling hole 7 is disposed between the two second resonant cavities 3, and the inductive coupling hole 5 is disposed between the first capacitive coupling hole 6 and the second capacitive coupling hole 7.
The first resonant cavity 2, the second resonant cavity 3 and the third resonant cavity 4 are all arranged along the edge of one side face of the medium body 1.
The first capacitive coupling hole 6 and the second capacitive coupling hole 7 are both blind holes, and the depth of the first capacitive coupling hole 6 is greater than that of the second capacitive coupling hole 7.
The inductive coupling hole 5 is a through hole, and the horizontal section of the inductive coupling hole 5 is in a cross shape.
Referring to fig. 4, the inductive coupling holes 5 are two in number, and each inductive coupling hole includes a first sub-inductive coupling hole 5 and a second sub-inductive coupling hole 5, the first sub-inductive coupling hole 5 is located between two first resonant cavities 2 and two third resonant cavities 4, and the second sub-inductive coupling hole 5 is located between two second resonant cavities 3 and two third resonant cavities 4.
Referring to fig. 3 and 5, a third capacitive coupling hole 8 is disposed on the other side surface of the dielectric body 1 opposite to the one side surface, the third capacitive coupling hole 8 is disposed opposite to the second capacitive coupling hole 7, and the structure of the third capacitive coupling hole 8 is the same as that of the second capacitive coupling hole 7.
Be equipped with two signal hole 9 on the relative another side in a side of medium body 1, two signal hole 9 sets up and the center pin of signal hole 9 and the center pin of the first resonant cavity 2 that corresponds rather than with two first resonant cavity 2 one-to-one respectively on same straight line, first resonant cavity 2 and signal hole 9 are the blind hole, the aperture of first resonant cavity 2 is greater than the aperture of signal hole 9.
The first resonant cavity 2, the second resonant cavity 3 and the third resonant cavity 4 are all the same in structure and are blind holes, and the hole depths of the first resonant cavity, the second resonant cavity and the third resonant cavity are also the same.
The novel dielectric waveguide filter designed by the scheme can flexibly adjust the coupling amount by adjusting the depth of the first capacitive coupling hole 6 and the second capacitive coupling hole 7 (both blind holes) and the diameter of the blind holes.
To sum up, the utility model provides a novel dielectric waveguide filter, through set up first capacitive coupling hole between two first resonant cavities, set up the second capacitive coupling hole between two second resonant cavities, can realize the capacitive cross coupling of dielectric waveguide filter, make dielectric waveguide filter realize 4 transmission zeros in limited space, be favorable to improving dielectric waveguide filter performance and allocate the outband rejection performance in a flexible way, in order to realize the dielectric waveguide filter of high selectivity; compared with the prior art, the manufacturing process is simplified, the production is easy, the volume of the dielectric waveguide filter cannot be increased, and the miniaturization of the dielectric waveguide filter can be ensured; the dielectric waveguide filter designed by the scheme simultaneously considers the convenience of later debugging, so that the debugging performance is easier to converge, and the debugging time is saved.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (6)
1. The utility model provides a novel dielectric waveguide filter, its characterized in that, includes the medium body, be equipped with two first resonant cavity, two second resonant cavity, two third resonant cavity and inductive coupling hole on the side of medium body, two be equipped with first capacitive coupling hole between the first resonant cavity, two be equipped with second capacitive coupling hole between the second resonant cavity, the inductive coupling hole is located between first capacitive coupling hole and the second capacitive coupling hole.
2. The novel dielectric waveguide filter of claim 1, wherein the first capacitive coupling hole and the second capacitive coupling hole are both blind holes, and the depth of the first capacitive coupling hole is greater than the depth of the second capacitive coupling hole.
3. The novel dielectric waveguide filter according to claim 1, wherein a third capacitive coupling hole is provided on the other side surface of the dielectric body opposite to the one side surface, the third capacitive coupling hole is opposite to the second capacitive coupling hole, and the structure of the third capacitive coupling hole is the same as that of the second capacitive coupling hole.
4. The novel dielectric waveguide filter according to claim 1, wherein two signal holes are provided on the other side surface opposite to the one side surface of the dielectric body, the two signal holes are respectively provided in one-to-one correspondence with the two first resonant cavities, and the central axes of the signal holes and the central axes of the corresponding first resonant cavities are on the same straight line, the first resonant cavities and the signal holes are blind holes, and the aperture of the first resonant cavities is larger than that of the signal holes.
5. The novel dielectric waveguide filter of claim 1, wherein the inductive coupling hole is a through hole, and the horizontal cross-sectional shape of the inductive coupling hole is cross-shaped.
6. The novel dielectric waveguide filter of claim 1, wherein the first resonant cavity, the second resonant cavity and the third resonant cavity have the same structure and are all blind holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020283660.6U CN211743354U (en) | 2020-03-10 | 2020-03-10 | Novel dielectric waveguide filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020283660.6U CN211743354U (en) | 2020-03-10 | 2020-03-10 | Novel dielectric waveguide filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112382835A (en) * | 2020-10-28 | 2021-02-19 | 南京六九零二科技有限公司 | Fully-adjustable cross-coupling dielectric waveguide filter |
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- 2020-03-10 CN CN202020283660.6U patent/CN211743354U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112382835A (en) * | 2020-10-28 | 2021-02-19 | 南京六九零二科技有限公司 | Fully-adjustable cross-coupling dielectric waveguide filter |
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