CN111600100A - Capacitive and inductive cross coupling structure and dielectric waveguide filter - Google Patents
Capacitive and inductive cross coupling structure and dielectric waveguide filter Download PDFInfo
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- CN111600100A CN111600100A CN202010612955.8A CN202010612955A CN111600100A CN 111600100 A CN111600100 A CN 111600100A CN 202010612955 A CN202010612955 A CN 202010612955A CN 111600100 A CN111600100 A CN 111600100A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/2002—Dielectric waveguide filters
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Abstract
The invention provides a capacitive and inductive cross-coupling structure and a dielectric waveguide filter, wherein the capacitive cross-coupling structure comprises a dielectric body, the dielectric body is provided with four resonance parts which are distributed in a matrix and provided with resonance blind holes, the capacitive cross-coupling structure also comprises four adjusting structures which are positioned between adjacent resonance parts on the edges of the matrix, and a coupling blind slot which is positioned in the middle of the matrix and has the length direction consistent with the connecting line direction of two nonadjacent resonance parts, and the depth of the coupling blind slot is more than one half of the thickness of the dielectric body. Through set up resonance blind hole and regulation structure at the medium body, adjust the resonant frequency of resonance portion. The depth of the coupling blind slot is larger than one half of the thickness of the medium body, so that the structure is a capacitive cross-coupling structure. And the mode of applying the matrix is placed the resonance blind hole to guarantee that coupling blind groove is unanimous with non-adjacent resonance portion line direction, can produce a pair of zero point, provide good frequency selection characteristic and outband rejection performance with this, guarantee the production quality of product.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to a waveguide type coupling device, and more particularly, to a capacitive and inductive cross-coupling structure and a dielectric waveguide filter.
[ background of the invention ]
In the 5G era, the filter is required to be more compact, integrated and lightweight due to the requirement of the large-scale antenna technology for large-scale antenna integration. The dielectric waveguide filter has small volume because the electromagnetic wave resonance occurs in the dielectric material without a metal cavity and the dielectric constant of the material per se is generally 20-50. Meanwhile, the ceramic dielectric waveguide filter has the advantages of high Q value, good frequency selection characteristic, good stability of working frequency, small insertion loss and the like.
Although the dielectric waveguide filter has the advantages, most of the dielectric waveguide filters are integrally formed by dry pressing at present, so that the actual structural requirements of the dielectric waveguide filter are high, and some structures which can be easily realized in a metal cavity are difficult to realize in the dielectric waveguide filter.
In view of this, there is a need for an improvement of the dielectric waveguide filter described above.
[ summary of the invention ]
The invention aims to provide a capacitive cross-coupling structure, an inductive cross-coupling structure and a dielectric waveguide filter, which have good frequency selection characteristics and out-of-band inhibition.
The technical scheme of the invention is as follows: the capacitive cross-coupling structure comprises a medium body, wherein the medium body is provided with four resonance parts which are distributed in a matrix and provided with resonance blind holes, the capacitive cross-coupling structure further comprises an adjusting structure which is arranged on the medium body and is positioned between any adjacent resonance parts, a coupling blind groove which is positioned in the middle of the matrix and has the length direction consistent with the connecting direction of the two nonadjacent resonance parts is positioned, and the depth of the coupling blind groove is greater than one half of the thickness of the medium body.
Optionally, the coupling blind slot connects two of the resonance parts located on a diagonal line of the matrix.
Further, the resonance blind holes and the coupling blind holes are circular or polygonal.
Further, the adjusting structure is a coupling through groove, a through hole or a coupling blind hole.
The invention also provides an inductive cross-coupling structure, which comprises a medium body, an adjusting structure and a coupling blind groove, wherein the medium body is provided with four resonance parts which are distributed in a matrix and provided with resonance blind holes, the adjusting structure is arranged on the medium body and positioned between any adjacent resonance parts, the coupling blind groove is positioned in the middle of the matrix, the length direction of the coupling blind groove is consistent with the connecting line direction of two nonadjacent resonance parts, and the depth of the coupling blind groove is less than or equal to one half of the thickness of the medium body.
Furthermore, the dielectric body comprises a first surface provided with the resonance part and the adjusting structure and a second surface arranged opposite to the first surface, two coupling blind grooves are arranged on the first surface and the second surface respectively.
The invention also provides a dielectric waveguide filter, which comprises an inductive cross-coupling structure and a capacitive cross-coupling structure connected with the inductive cross-coupling structure.
The invention has the beneficial effects that: through set up resonance blind hole and regulation structure at the medium body, adjust the resonant frequency of resonance portion. The depth of the coupling blind slot is larger than one half of the thickness of the medium body, so that the structure is a capacitive cross-coupling structure. And the mode of applying the matrix is placed resonance blind hole to guarantee that coupling blind groove is unanimous with non-adjacent resonance portion line direction, can produce a pair of zero point, thereby provide good frequency selection characteristic and outband rejection performance, guarantee the production quality of product.
[ description of the drawings ]
FIG. 1 is a top view of a capacitive cross-coupling structure according to a first embodiment of the present invention;
FIG. 2 is a cross-sectional view of the capacitive cross-coupling structure of FIG. 1 taken along the A-A direction;
FIG. 3 is a top view of an inductive cross-coupling structure according to a second embodiment of the present invention;
FIG. 4 is a cross-sectional view of the inductive cross-coupling structure of FIG. 3 taken along the direction B-B;
fig. 5 is a plan view of a dielectric waveguide filter in a third embodiment of the present invention;
fig. 6 is a front view of a dielectric waveguide filter in a third embodiment of the present invention;
FIG. 7 is a cross-sectional view of the dielectric waveguide filter of FIG. 5 taken along the direction C-C;
FIG. 8 is a cross-sectional view of the dielectric waveguide filter of FIG. 5 taken along the direction D-D;
fig. 9 is a cross-sectional view of the dielectric waveguide filter of fig. 6 taken along the direction E-E;
fig. 10 is a sectional view of the dielectric waveguide filter of fig. 7 taken along the direction F-F;
fig. 11 is a perspective view of a dielectric waveguide filter in a third embodiment of the present invention;
fig. 12 is a diagram showing a filtering effect of a dielectric waveguide filter in a third embodiment of the present invention;
fig. 13 is a schematic view of a topology of a dielectric waveguide filter in a third embodiment of the present invention.
[ detailed description ] embodiments
The invention is further described with reference to the following figures and embodiments.
Referring to fig. 1 and 2, fig. 1 is a top view of a capacitive cross-coupling structure according to a first embodiment of the invention. Fig. 2 is a cross-sectional view of the capacitive cross-coupling structure of fig. 1 taken along the direction a-a.
The invention provides a capacitive cross-coupling structure which comprises a medium body, an adjusting structure and a coupling blind groove 15, wherein the medium body is provided with four resonance parts which are distributed in a matrix and provided with resonance blind holes 11, the adjusting structure is arranged on the medium body and positioned between any adjacent resonance parts, the coupling blind groove 15 is positioned in the middle of the matrix, the length direction of the coupling blind groove is consistent with the connecting direction of two non-adjacent resonance parts, and the depth of the coupling blind groove 15 is more than one half of the thickness of the medium body.
The invention has the beneficial effects that: through set up resonance blind hole 11 and regulation structure at the medium body, can realize the regulation of the resonant frequency of the resonance portion of place, through resonance blind hole 11 and the depth of regulation structure, diameter isoparametric, adjust resonant frequency. The mode of applying the matrix to place the resonance blind holes 11 and adjust the structure is beneficial to arranging the coupling blind grooves 15 between the resonance parts on the diagonal line of the rectangular array, ensures that the connecting line directions of the coupling blind grooves and the nonadjacent resonance parts on the matrix are consistent, can generate a pair of zero points, thereby providing good frequency selection characteristic and out-of-band inhibition performance and ensuring the production quality of products.
In the present embodiment, the resonant blind hole 11 is generally disposed at the center of the corresponding resonant portion. The depths of all the resonant blind holes 11 can be equal or unequal, and the diameters of all the resonant blind holes 11 can be equal or unequal.
The adjusting structure is a coupling through groove 14, a through hole 13 or a coupling blind hole 16. In order to meet the actual use requirement, the adjusting structures with different depths and shapes can be arranged, so that the frequency can be correspondingly adjusted according to the actual requirement.
The coupling blind slots 15 in the above are directed to different resonance parts, respectively.
In particular, the length, width and depth of the coupling blind slot 15 can be referred to their performance parameters. The use of the coupling blind slot 15 in the rectangular array helps to generate capacitive coupling between the resonance parts on the diagonal of the rectangle, so that the dielectric waveguide filter 100 generates a pair of zeros, thereby improving out-of-band rejection. And through the structure, better frequency-selecting characteristics are obtained.
Alternatively, the coupling blind slot 15 connects two resonance portions located on diagonal lines of the matrix. The capacitive coupling can be realized regardless of whether the coupling blind slot 15 is communicated with the resonance part. In this embodiment, the coupling blind slot 15 is a strip, and the coupling characteristic thereof is better than that of an arc.
Further, the resonant blind hole 11 and the coupling blind hole 16 are circular or polygonal. By arranging the resonant blind holes 11 in different shapes, the suppression of out-of-band harmonics can be changed and the suppression effect can be adjusted accordingly.
The invention also provides an inductive cross-coupling structure, which comprises a medium body. The medium body is provided with four resonance parts which are distributed in a matrix and provided with resonance blind holes 11, and further comprises an adjusting structure which is arranged on the medium body and is positioned between any adjacent resonance parts, a coupling blind groove 12 which is positioned in the middle of the matrix and has the length direction consistent with the connecting direction of the two nonadjacent resonance parts, and the depth of the coupling blind groove 12 is less than or equal to one half of the thickness of the medium body.
In this embodiment, the resonant portion of the inductive cross-coupling structure and the coupling blind slot may generate a pair of zeros, so as to provide good frequency selection characteristics and out-of-band rejection performance, and ensure the production quality of the product. In a specific filtering structure, when the coupling bandwidth value is greater than 0, the coupling is inductive, and when the coupling bandwidth value is less than 0, the coupling is capacitive. In this embodiment, the inductive cross-coupling structure and the capacitive cross-coupling structure are similar as a whole, and in production, the inductive cross-coupling structure and the capacitive cross-coupling structure are respectively manufactured by changing the depth of the coupling blind slot 12. If the depth of the blind groove is larger than one half of the thickness of the body, the cross coupling structure is a capacitive cross coupling structure; if the depth of the coupling blind slot 12 is less than or close to half of the thickness of the medium body, the cross-coupling structure is an inductive cross-coupling structure.
In the inductive cross-coupling structure the dielectric body comprises a first surface 10 provided with a resonance and a tuning structure. In this embodiment, the coupling blind grooves 12 are provided on the first surface 10.
Further, in the inductive cross-coupling structure, the dielectric body includes a second surface 20 disposed opposite to the first surface 10, there are two coupling blind slots 12, and the two coupling blind slots 12 are disposed on the first surface 10 and the second surface 20, respectively. By providing two coupling blind slots 12, the parameters of the coupling blind slots are determined more precisely, and the resonance frequency is adjusted accordingly.
Further, please refer to fig. 5 to 11; fig. 5 is a plan view of a dielectric waveguide filter in a third embodiment of the present invention; fig. 6 is a front view of a dielectric waveguide filter in a third embodiment of the present invention; FIG. 7 is a cross-sectional view of the dielectric waveguide filter of FIG. 5 taken along the direction C-C; FIG. 8 is a cross-sectional view of the dielectric waveguide filter of FIG. 5 taken along the direction D-D; fig. 9 is a cross-sectional view of the dielectric waveguide filter of fig. 6 taken along the direction E-E; fig. 10 is a sectional view of the dielectric waveguide filter of fig. 7 taken along the direction F-F; fig. 11 is a perspective view of a dielectric waveguide filter in a third embodiment of the present invention.
The invention also provides a dielectric waveguide filter, which comprises an inductive cross-coupling structure and a capacitive cross-coupling structure connected with the inductive cross-coupling structure. Which forms a desired operating characteristic by adjusting the resonant frequency of the plurality of tuning structures and the coupling strength between the tuning structures.
In this embodiment, after the inductive coupling structure and the capacitive coupling structure are connected, the capacitive cross coupling is used to suppress the left passband, and the inductive cross coupling is used to suppress the right passband, so as to achieve the filtering effect. In the present embodiment, the specific effect of the dielectric waveguide filter 100 is as shown in fig. 12; the topology of the dielectric waveguide filter 100 is shown in fig. 13.
In summary, the dielectric waveguide filter 100 provided by the present invention can obtain good frequency-selective characteristics and out-of-band rejection performance, and the structure is simple and convenient to produce.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (7)
1. The capacitive cross-coupling structure comprises a medium body, wherein the medium body is provided with four resonance parts which are distributed in a matrix and provided with resonance blind holes, and the capacitive cross-coupling structure is characterized by further comprising an adjusting structure which is arranged on the medium body and is positioned between any adjacent resonance parts, and a coupling blind slot which is positioned in the middle of the matrix and has the length direction consistent with the connecting line direction of the two nonadjacent resonance parts, wherein the depth of the coupling blind slot is greater than one half of the thickness of the medium body.
2. The capacitive cross-coupling structure according to claim 1, wherein the coupling blind slot connects two of the resonance sections located on diagonal lines of the matrix.
3. The capacitive cross-coupling structure according to claim 1, wherein the resonant and coupling blind holes are circular or polygonal.
4. The capacitive cross-coupling structure of claim 1, wherein the adjustment structure is a coupling through slot, a through hole or a coupling blind hole.
5. An inductive cross-coupling structure is characterized by comprising a medium body, wherein the medium body is provided with four resonance parts which are distributed in a matrix and provided with resonance blind holes, the inductive cross-coupling structure is characterized by further comprising an adjusting structure which is arranged on the medium body and is positioned between any adjacent resonance parts, and a coupling blind slot which is positioned in the middle of the matrix and has the length direction consistent with the connecting direction of two nonadjacent resonance parts, and the depth of the coupling blind slot is less than or equal to half of the thickness of the medium body.
6. An inductive cross-coupling structure according to claim 5, wherein said dielectric body comprises a first surface on which said resonance portion and said adjusting structure are disposed and a second surface opposite to said first surface, and there are two coupling blind slots, and two coupling blind slots are disposed on said first surface and said second surface respectively.
7. A dielectric waveguide filter comprising an inductive cross-coupling structure and a capacitive cross-coupling structure connected to the inductive cross-coupling structure.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010612955.8A CN111600100A (en) | 2020-06-30 | 2020-06-30 | Capacitive and inductive cross coupling structure and dielectric waveguide filter |
| PCT/CN2020/102980 WO2022000590A1 (en) | 2020-06-30 | 2020-07-20 | Capacitive and inductive cross coupling structure and dielectric waveguide filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010612955.8A CN111600100A (en) | 2020-06-30 | 2020-06-30 | Capacitive and inductive cross coupling structure and dielectric waveguide filter |
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| CN111600100A true CN111600100A (en) | 2020-08-28 |
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| CN202010612955.8A Pending CN111600100A (en) | 2020-06-30 | 2020-06-30 | Capacitive and inductive cross coupling structure and dielectric waveguide filter |
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| WO (1) | WO2022000590A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112599949A (en) * | 2020-12-24 | 2021-04-02 | 京信射频技术(广州)有限公司 | Dielectric filter and filtering loop thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117638435B (en) * | 2023-12-05 | 2024-06-18 | 南京林业大学 | Cross-coupling dielectric waveguide filter and communication equipment |
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| JPH06296104A (en) * | 1993-04-09 | 1994-10-21 | Murata Mfg Co Ltd | Dielectric filter |
| CN110556613A (en) * | 2019-09-29 | 2019-12-10 | 江西一创新材料有限公司 | Cross coupling structure for adjusting transmission zero symmetry |
| CN210040477U (en) * | 2019-08-28 | 2020-02-07 | 中兴通讯股份有限公司 | Cross coupling filter |
| CN210468051U (en) * | 2019-09-29 | 2020-05-05 | 江西一创新材料有限公司 | Cross coupling structure for adjusting transmission zero symmetry |
| CN210778910U (en) * | 2019-07-11 | 2020-06-16 | 中兴通讯股份有限公司 | Filter coupling unit and filter |
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| JPH11220307A (en) * | 1998-01-30 | 1999-08-10 | Toko Inc | Dielectric filter |
| CN112886161B (en) * | 2015-11-27 | 2022-03-29 | 华为技术有限公司 | Dielectric filter, transceiver and base station |
| CN110148818A (en) * | 2019-06-13 | 2019-08-20 | 无锡惠虹电子有限公司 | A kind of 5G communication multilayer dielectricity waveguide filter |
| CN110504512A (en) * | 2019-07-25 | 2019-11-26 | 江苏江佳电子股份有限公司 | A kind of capacitive coupling structure and the dielectric filter using the structure |
| EP4037093A4 (en) * | 2019-09-27 | 2023-06-07 | Mobi Antenna Technologies (Shenzhen) Co., Ltd. | Ceramic dielectric filter |
| CN210379367U (en) * | 2019-09-27 | 2020-04-21 | 摩比天线技术（深圳）有限公司 | Ceramic dielectric filter |
| CN110783668B (en) * | 2019-10-12 | 2021-02-09 | 京信通信技术(广州)有限公司 | Communication device, dielectric waveguide filter and capacitance coupling adjusting method thereof |
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2020
- 2020-06-30 CN CN202010612955.8A patent/CN111600100A/en active Pending
- 2020-07-20 WO PCT/CN2020/102980 patent/WO2022000590A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06296104A (en) * | 1993-04-09 | 1994-10-21 | Murata Mfg Co Ltd | Dielectric filter |
| CN210778910U (en) * | 2019-07-11 | 2020-06-16 | 中兴通讯股份有限公司 | Filter coupling unit and filter |
| CN210040477U (en) * | 2019-08-28 | 2020-02-07 | 中兴通讯股份有限公司 | Cross coupling filter |
| CN110556613A (en) * | 2019-09-29 | 2019-12-10 | 江西一创新材料有限公司 | Cross coupling structure for adjusting transmission zero symmetry |
| CN210468051U (en) * | 2019-09-29 | 2020-05-05 | 江西一创新材料有限公司 | Cross coupling structure for adjusting transmission zero symmetry |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112599949A (en) * | 2020-12-24 | 2021-04-02 | 京信射频技术(广州)有限公司 | Dielectric filter and filtering loop thereof |
| CN112599949B (en) * | 2020-12-24 | 2022-05-03 | 京信射频技术(广州)有限公司 | Dielectric filter and filtering loop thereof |
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| WO2022000590A1 (en) | 2022-01-06 |
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Application publication date: 20200828 |
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