CN109728385B - Dielectric filter coupling structure with symmetrical zero characteristic - Google Patents
Dielectric filter coupling structure with symmetrical zero characteristic Download PDFInfo
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- CN109728385B CN109728385B CN201910132396.8A CN201910132396A CN109728385B CN 109728385 B CN109728385 B CN 109728385B CN 201910132396 A CN201910132396 A CN 201910132396A CN 109728385 B CN109728385 B CN 109728385B
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- blind hole
- dielectric filter
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- filter body
- blind
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- 230000008878 coupling Effects 0.000 title claims abstract description 52
- 238000010168 coupling process Methods 0.000 title claims abstract description 52
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 52
- 238000006880 cross-coupling reaction Methods 0.000 claims abstract description 18
- 238000010586 diagram Methods 0.000 description 4
- 230000002146 bilateral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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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
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
- H01P1/2088—Integrated in a substrate
Abstract
The invention relates to a dielectric filter coupling structure with symmetrical zero characteristics, which comprises a dielectric filter body, wherein the dielectric filter body is rectangular, two first blind holes are symmetrically formed in the upper surface of the dielectric filter body along two sides of a central axis, and a second blind hole is formed in the upper surface of the dielectric filter body along one end of the first blind hole; the medium between the first blind hole and the second blind hole on the same side forms a first main coupling, and the medium between the two first main couplings forms a first cross coupling; a third blind hole is arranged between the two second blind holes, the third blind hole forms second main coupling, and a medium between the two second blind holes and the third blind hole forms second cross coupling. By introducing the third blind hole, the invention can realize an asymmetric response curve of which the low-end zero point is close to the passband or the high-end zero point is close to the passband. Thereby improving the design flexibility of the dielectric filter.
Description
Technical Field
The invention relates to a dielectric filter coupling structure with symmetrical zero characteristics, and belongs to the technical field of electronic components in the communication field.
Background
In recent years, with increasing demands for high performance and miniaturization of communication devices, dielectric filters have been increasingly paid attention to. However, the prior dielectric filter coupling structure with symmetrical zero arrangement characteristic is fixed, namely, the zero at the high end of the filter passband is always closer to the passband than the zero at the low end.
Disclosure of Invention
The invention provides a dielectric filter coupling structure with symmetrical zero characteristics, which not only can realize a response curve with symmetrical zero, but also can realize an asymmetric response curve with a low-end zero close to a passband or a high-end zero close to the passband, and the specific scheme is as follows:
the utility model provides a dielectric filter coupling structure with symmetry zero characteristic, includes the dielectric filter body, the dielectric filter body is the rectangle, and the upper surface of dielectric filter body is provided with two first blind holes along the bilateral symmetry of axis, and the upper surface of dielectric filter body is provided with the second blind hole along the one end of first blind hole, and the side edge of dielectric filter body is provided with first through groove along between first blind hole and the second blind hole, is equipped with the second through groove along between two first blind holes; the medium between the first blind hole and the second blind hole on the same side forms a first main coupling, and the medium between the two first main couplings forms a first cross coupling; a third blind hole is arranged between the two second blind holes, the third blind hole forms second main coupling, and a medium between the two second blind holes and the third blind hole forms second cross coupling.
Further, the first main coupling and the first cross coupling are magnetic couplings.
Further, the depth of the third blind hole is not less than 1/2 of the thickness of the dielectric filter body, and the second main coupling is capacitive coupling.
Further, the axis of the third blind hole deviates from the axis connecting line of the two second blind holes and is positioned at one end close to the first blind hole, and the second cross coupling is capacitive coupling.
Further, the axis of the third blind hole deviates from the axis connecting line of the two second blind holes, is positioned at one end far away from the first blind hole and is close to the outer end edge of the dielectric filter body, and the second cross coupling is inductive coupling.
Further, the axis of the third blind hole deviates from the axis connecting line of the two second blind holes, is positioned at one end far away from the first blind hole and is close to the axis connecting line of the two second blind holes, and the coupling amount of the second cross coupling is zero.
The beneficial effects obtained by the invention are as follows: by introducing the third blind hole, the symmetrical zero points can be arranged more flexibly, so that not only the symmetrical response curve of the zero points can be realized, but also the asymmetrical response curve of the low-end zero point close to the passband or the high-end zero point close to the passband can be realized. Thereby improving the design flexibility of the dielectric filter.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic structural diagram of a dielectric filter body in embodiment 1;
FIG. 3 is a frequency response curve of the dielectric filter body in embodiment 1;
fig. 4 is a schematic structural diagram of a dielectric filter body in embodiment 2;
FIG. 5 is a frequency response curve of the dielectric filter body in embodiment 2;
fig. 6 is a schematic structural diagram of a dielectric filter body in embodiment 3;
fig. 7 is a frequency response curve of the dielectric filter body in embodiment 3.
Detailed Description
A dielectric filter coupling structure with symmetrical zero characteristic as shown in figure 1 comprises a dielectric filter body, wherein the dielectric filter body can adopt ceramic media in accordance with the prior art. In this scheme, the dielectric filter body is the rectangle, and the bilateral symmetry of dielectric filter body's upper surface along the axis is provided with two first blind holes 14, and the upper surface of dielectric filter body is provided with second blind hole 15 along the one end of first blind hole, combines the distribution of above-mentioned first blind hole, and the second blind hole is provided with two along the axis symmetry of dielectric filter body equally. A first through groove 16 is formed between the first blind hole and the second blind hole along the side edge of the dielectric filter body, and a second through groove 17 is formed between the two first blind holes along the dielectric filter body; the medium between the first blind hole and the second blind hole on the same side forms a first main coupling, namely main coupling (m 23) 1 and main coupling (m 45) 3 in the figure, and the medium between the two first main couplings forms a first cross coupling, namely cross coupling (m 25) 4 in the figure; a third blind hole is arranged between the two second blind holes, the third blind hole forms second main coupling, the main coupling (m 34) 2 is shown in the figure, and the medium between the two second blind holes and the third blind hole forms second cross coupling, and the medium is crossed (m 24) 5 in the figure. The above structural features are that the basic scheme of the invention is completed, in the scheme, the introduction of the third blind hole is a key point different from the prior art, the position of the third blind hole can be adjusted along the central axis of the dielectric filter body in specific design, the position adjustment of the third blind hole causes the position adjustment of the main coupling (m 34) 2, the adjustment of cross coupling (m 24) can be realized, and the adjustment of the symmetrical zero characteristic of the dielectric filter is further realized.
Preferably, the main coupling (m 23) 1, the main coupling (m 45) 3, and the cross coupling (m 25) 4 are magnetic couplings. The coupling amount is determined by the size of a window which is communicated with the two cavities, the larger the window is, the stronger the coupling is, and vice versa, the size of the window is adjusted by the opening widths of the first through groove and the second through groove.
Preferably, the depth of the third blind hole is not less than 1/2 of the thickness of the dielectric filter body, the main coupling (m 34) 2 is capacitive coupling, and the deeper the depth of the third blind hole, the smaller the coupling amount, and vice versa.
Example 1
Based on the above scheme, in one embodiment, as shown in fig. 2, if the third blind hole for implementing the main coupling (m 34) 2 is biased toward the center of the dielectric filter body, that is, toward one end of the first blind hole, the response curve is shown in fig. 3, the high-end zero point 6 is closer to the passband than the low-end zero point 7, and the cross coupling (m 24) is capacitive coupling. As shown in fig. 2, the greater the offset distance 5 of the axis of the third blind hole from the axis connecting line of the two second blind holes, the stronger the asymmetry of the high-end zero point 6 and the low-end zero point 7, and vice versa.
Example 2
In another embodiment, as shown in connection with fig. 4, if the third blind hole for realizing the main coupling (m 34) 2 is biased towards the outer edge of the dielectric filter body, the response curve is shown in fig. 5, where the low-side zero 10 is closer to the passband than the high-side zero 9. As shown in fig. 4, the greater the offset distance 8 of the axis of the third blind hole from the axis connecting line of the two second blind holes, the stronger the asymmetry of the high-end zero point 9 and the low-end zero point 10, and vice versa.
Example 3
In another embodiment, as shown in fig. 6, if the third blind hole for implementing the main coupling (m 34) 2 is slightly deviated from the outer edge of the dielectric filter body, the response curve is shown in fig. 7, and the low-end zero point 13 and the high-end zero point 12 are symmetrically arranged. Referring to fig. 6, when the offset distance 11 of the axis of the third blind hole from the axis connecting line of the two second blind holes is equal to a specific value, the distances between the high-end zero point 12 and the low-end zero point 13 and the passband are completely equal, and the symmetrical arrangement characteristic is presented.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides a dielectric filter coupling structure with symmetry zero characteristic, includes dielectric filter body, its characterized in that: the dielectric filter body is rectangular, two first blind holes are symmetrically formed in the upper surface of the dielectric filter body along two sides of the central axis, a second blind hole is formed in the upper surface of the dielectric filter body along one end of the first blind hole, a first through groove is formed in the side edge of the dielectric filter body between the first blind hole and the second blind hole, and a second through groove is formed in the dielectric filter body along the position between the two first blind holes; the medium between the first blind hole and the second blind hole on the same side forms a first main coupling, and the medium between the two first main couplings forms a first cross coupling; a third blind hole is arranged between the two second blind holes, the third blind hole forms second main coupling, and a medium between the two second blind holes and the third blind hole forms second cross coupling.
2. The dielectric filter coupling structure with symmetrical zero characteristic according to claim 1, wherein: the first main coupling and the first cross coupling are magnetic couplings.
3. The dielectric filter coupling structure having symmetrical zero characteristics according to claim 2, wherein: the depth of the third blind hole is not less than 1/2 of the thickness of the dielectric filter body, and the second main coupling is capacitive coupling.
4. A dielectric filter coupling structure having a symmetrical zero characteristic according to claim 3, wherein: the axis of the third blind hole deviates from the axis connecting line of the two second blind holes, is positioned at one end far away from the first blind hole and is close to the axis connecting line of the two second blind holes, and the coupling quantity of the second cross coupling is zero.
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| CN201910132396.8A CN109728385B (en) | 2019-02-22 | 2019-02-22 | Dielectric filter coupling structure with symmetrical zero characteristic |
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| CN109728385A CN109728385A (en) | 2019-05-07 |
| CN109728385B true CN109728385B (en) | 2023-12-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110137645B (en) * | 2019-07-01 | 2021-08-31 | 广东国华新材料科技股份有限公司 | Dielectric waveguide filter |
| CN110364790A (en) * | 2019-07-05 | 2019-10-22 | 京信通信技术(广州)有限公司 | Filter and its multi-zero realize module |
| CN210778910U (en) * | 2019-07-11 | 2020-06-16 | 中兴通讯股份有限公司 | Filter coupling unit and filter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101436698A (en) * | 2007-11-16 | 2009-05-20 | 泉州波园射频新技术研究中心 | Microwave low waveband TM010 module high selectivity cavity dielectric filter |
| CN202217763U (en) * | 2011-08-29 | 2012-05-09 | 武汉凡谷电子技术股份有限公司 | Cross coupling device of filter |
| WO2014194477A1 (en) * | 2013-06-04 | 2014-12-11 | 华为技术有限公司 | Dielectric resonator and dielectric filter, transceiver and base station using same |
| CN105633518A (en) * | 2016-01-04 | 2016-06-01 | 张家港保税区灿勤科技有限公司 | Filter for transceiver and base station |
| CN107534197A (en) * | 2015-11-27 | 2018-01-02 | 华为技术有限公司 | Dielectric filter, transceiver and base station |
| CN107994310A (en) * | 2017-11-29 | 2018-05-04 | 深圳市麦捷微电子科技股份有限公司 | A kind of dielectric waveguide filter negative zero point coupled structure |
-
2019
- 2019-02-22 CN CN201910132396.8A patent/CN109728385B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101436698A (en) * | 2007-11-16 | 2009-05-20 | 泉州波园射频新技术研究中心 | Microwave low waveband TM010 module high selectivity cavity dielectric filter |
| CN202217763U (en) * | 2011-08-29 | 2012-05-09 | 武汉凡谷电子技术股份有限公司 | Cross coupling device of filter |
| WO2014194477A1 (en) * | 2013-06-04 | 2014-12-11 | 华为技术有限公司 | Dielectric resonator and dielectric filter, transceiver and base station using same |
| CN107534197A (en) * | 2015-11-27 | 2018-01-02 | 华为技术有限公司 | Dielectric filter, transceiver and base station |
| CN105633518A (en) * | 2016-01-04 | 2016-06-01 | 张家港保税区灿勤科技有限公司 | Filter for transceiver and base station |
| CN107994310A (en) * | 2017-11-29 | 2018-05-04 | 深圳市麦捷微电子科技股份有限公司 | A kind of dielectric waveguide filter negative zero point coupled structure |
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