CN109672011B - Antenna and dielectric waveguide filter thereof - Google Patents
Antenna and dielectric waveguide filter thereof Download PDFInfo
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- CN109672011B CN109672011B CN201811322430.XA CN201811322430A CN109672011B CN 109672011 B CN109672011 B CN 109672011B CN 201811322430 A CN201811322430 A CN 201811322430A CN 109672011 B CN109672011 B CN 109672011B
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- 239000002184 metal Substances 0.000 claims abstract description 58
- 239000000758 substrate Substances 0.000 claims abstract description 25
- 238000009413 insulation Methods 0.000 claims abstract description 23
- 239000000919 ceramic Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 230000001629 suppression Effects 0.000 abstract description 6
- 230000005855 radiation Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000003989 dielectric material Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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Abstract
The application discloses an antenna and a dielectric waveguide filter thereof, wherein the dielectric waveguide filter comprises: the filter comprises a filter body and a low-pass circuit layer, wherein a first metal layer serving as an electric wall and a short circuit layer are arranged on the outer wall of the filter body, the short circuit layer comprises a connecting end electrically connected with the first metal layer and a short wire connected with the connecting end, a first insulation groove is arranged between the first metal layer and the short wire, and the bottom wall of the first insulation groove is a dielectric layer; one end of the low-pass circuit layer is electrically connected with the shorting stub, and the other end is provided with an input/output connection end. The low-pass circuit layer is arranged on the substrate to form the dielectric waveguide filter with broadband harmonic suppression, so that the problem of over-narrow out-of-band suppression width can be effectively solved; the antenna has more reliable radiation performance by using the dielectric waveguide filter.
Description
Technical Field
The application relates to the technical field of communication equipment, in particular to an antenna and a dielectric waveguide filter thereof.
Background
As the high-speed development of communication systems has advanced into the 5G age, miniaturization of components is a key for the development of communication devices thereof, and waveguide filters have also been forced to progress toward miniaturization as key components in wireless communication.
The dielectric material with high dielectric constant can be applied to a dielectric waveguide filter device to obtain the dielectric waveguide filter, the dielectric waveguide filter improves the air filling form of the traditional waveguide filter into the form of filling the dielectric material with high dielectric constant, the dielectric material plays roles of transmitting signals and supporting a structure after being molded, and the metal layer is attached to the surface of the dielectric material to form an electric wall, so that the electromagnetic shielding effect is achieved, and the size and the weight of the waveguide filter can be obviously reduced.
At present, in the traditional dielectric waveguide filter, the miniaturization of the dielectric waveguide filter can be realized by the dielectric material with high dielectric constant. But it brings about the drawing of the higher order modes, which results in an out-of-band rejection width that is too narrow to meet the requirements.
Disclosure of Invention
Based on this, it is necessary to provide an antenna and a dielectric waveguide filter thereof, wherein the dielectric waveguide filter is formed by arranging a low-pass circuit layer on a substrate, so that the problem that the out-of-band rejection width is too narrow can be effectively solved; the antenna has more reliable radiation performance by using the dielectric waveguide filter.
The technical scheme is as follows:
in one aspect, the present application provides a dielectric waveguide filter comprising: the filter comprises a filter body, wherein a first metal layer and a short circuit layer are arranged on the outer wall of the filter body, and the short circuit layer comprises a connecting end electrically connected with the first metal layer and a short circuit wire arranged in an insulating manner with the first metal layer; and one end of the low-pass circuit layer is electrically connected with the shorting stub, and the other end of the low-pass circuit layer is provided with a first input/output electrode.
When the dielectric waveguide filter is used, the dielectric waveguide filter with broadband harmonic suppression is formed by integrating the dielectric waveguide filter with the low-pass circuit layer, and compared with the traditional dielectric waveguide filter, the dielectric waveguide filter can greatly suppress a higher order mode and can greatly suppress the out-of-band suppression to be 3 times of frequency.
The technical scheme is further described as follows:
in one embodiment, the low-pass circuit layer is a strip line, and the strip line is provided with a filtering branch. Thus, the length of the filtering branch can be set to more accurately perform broadband harmonic suppression.
In one embodiment, the low-pass circuit layer is disposed on the filter body.
In one embodiment, the short-circuit layers include two short-circuit layers, and the two short-circuit layers are arranged at intervals; the dielectric waveguide filter further comprises a substrate which is arranged opposite to the filter body, the substrate comprises a first surface which is arranged opposite to the first metal layer and a second surface which is arranged opposite to the first surface, the second surface is provided with a grounding layer and two open lines which are arranged in an insulating manner with the grounding layer, one open line is electrically connected with a corresponding short line and forms an input/output electrode, one end of the low-pass circuit layer is electrically connected with the other short line, and the input/output connection end is electrically connected with the open line and forms the other input/output electrode. Thus, compared with the prior art, the dielectric waveguide filter reduces coaxial connectors and cables, reduces the cost and further reduces the volume; the open line is used as an input/output electrode, so that the connection between the dielectric waveguide filter and other components is more flexible; further, the port coupling bandwidth of the waveguide filter can be controlled by changing the size of the shorting stub, the debugging method is simple, and the adjustment can achieve a very wide port coupling bandwidth.
In one embodiment, the low-pass circuit layer is disposed on the substrate.
In one embodiment, the first surface is provided with connection wires electrically connected to the shorting bars in a one-to-one correspondence, wherein one connection wire is electrically connected to the open circuit line through one metal via, and the other connection wire is electrically connected to one end of the low-pass circuit layer through the other metal via.
In one embodiment, the substrate is further provided with at least two metal vias and a wire electrically connected with the two metal vias, one end of the wire is electrically connected with the connecting wire through one of the metal vias, and the other end of the wire is electrically connected with the open circuit through the other metal via.
In one embodiment, a first insulation groove is arranged between the first metal layer and the shorting bar, and the bottom wall of the first insulation groove is a dielectric layer.
In one embodiment, a dielectric filling layer is disposed in the first insulation groove.
In one embodiment, the shape of the connecting line is the same as or similar to the shape of the shorting line, and the area of the connecting line is smaller than the area of the shorting line.
On the other hand, the application also provides an antenna which comprises the dielectric waveguide filter, wherein the filter body is made of a ceramic medium with a high dielectric constant.
The antenna utilizes the dielectric waveguide filter, so that the volume of the antenna can be further reduced, and the miniaturization development of the base station antenna is facilitated. In addition, the dielectric waveguide filter can effectively solve the problem of over-narrow out-of-band rejection width, and is beneficial to ensuring the reliability of the overall performance.
Drawings
FIG. 1 is a schematic diagram of a dielectric waveguide filter according to one embodiment;
FIG. 2 is a schematic exploded view of the dielectric waveguide filter (schematic view of input/output structure) according to the embodiment shown in FIG. 1;
fig. 3 is a schematic diagram of the dielectric waveguide filter.
Reference numerals illustrate:
100. the filter comprises a filter body 110, a first metal layer 120, a short circuit layer 122, a connecting end 124, a short circuit wire 130, a first insulation groove 200, a substrate 210, a grounding layer 220, an opening line 230, a metal via 240, a low-pass circuit layer 242, a filtering branch 244, an input and output connecting end 250, a connecting wire 260, a conducting wire 270, a second metal layer 280 and a second insulation groove.
Detailed Description
The present application will be further described in detail with reference to the drawings and the detailed description, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the application.
It will be understood that when an element is referred to as being "mounted," "positioned," "secured" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, when one element is "electrically connected" to another element, the two may be detachably connected, or may not be detachably connected, such as welding, electro-adhesion, or metal plating, which may be implemented in the prior art, which is not further described herein. When an element is perpendicular or nearly perpendicular to another element, it is meant that the ideal conditions for both are perpendicular, but certain vertical errors may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" as used herein do not denote a particular quantity or order, but rather are used to distinguish one element from another.
As shown in fig. 1 to 2, in the present embodiment, there is provided a dielectric waveguide filter including: the filter body 100, the outer wall of the filter body 100 is provided with a first metal layer 110 and a shorting layer 120, the shorting layer 120 comprises a connecting end 122 electrically connected with the first metal layer 110, and a shorting wire 124 arranged in an insulating manner with the first metal layer 110; a low-pass circuit layer 240 is further provided, one end of the low-pass circuit layer 240 is electrically connected to one shorting bar 124, and the other end is provided with an input/output connection 244.
When the dielectric waveguide filter is used, the dielectric waveguide filter with broadband harmonic suppression is formed by integrating the dielectric waveguide filter with the low-pass circuit layer 240, and compared with the traditional dielectric waveguide filter, the dielectric waveguide filter can greatly suppress a higher order mode, and can greatly suppress the out-of-band to 3 times of frequency.
It should be noted that, the dielectric waveguide filter may use a conventional input/output device to input/output signals, such as a coaxial connector and a cable.
Based on the above embodiments, as shown in fig. 2 and 3, in one embodiment, the low-pass circuit layer 240 is a strip line, and the strip line is provided with a filtering branch 242. This allows for more accurate wideband harmonic rejection by setting the length of the filter stub 242.
Based on any of the above embodiments, as shown in fig. 2 and 3, in one embodiment, the shorting layers 120 include two shorting layers 120, and the two shorting layers 120 are spaced apart from each other; the dielectric waveguide filter further includes a substrate 100, the substrate 100 is disposed on the first metal layer 110, the substrate 200 includes a first surface 202 disposed near the first metal layer 110, and a second surface 204 opposite to the first surface 202, the second surface 204 is provided with a ground layer 210 and two open lines 220 disposed insulated from the ground layer 210, and the two open lines 220 are electrically connected to the shorting lines 124 of the corresponding shorting layers 120 respectively. Thus, one of the open lines 220 may be an input electrode and the other open line 220 may be an output electrode.
Further, one of the open lines 220 is electrically connected to a corresponding one of the shorting lines 124 and forms one of the input/output electrodes, one end of the low-pass circuit layer 240 is electrically connected to the other shorting line 124, and the input/output connection 244 is electrically connected to the open line 220 and forms the other of the input/output electrodes. In this way, the first metal layer 110 and the shorting layer 120 are sandwiched between the filter body 100 and the substrate 200, and are electrically connected (indirectly and directly electrically connected) to the shorting bar 124 through the opening line 220 on the substrate 200, so that the opening line 220 can be used as an input/output electrode, and thus, the signal input and the signal output of the dielectric waveguide filter can be realized by connecting (welding and fixing, etc.) the opening line 220 with other components. Thus, compared with the prior art, the dielectric waveguide filter reduces coaxial connectors and cables, reduces the cost and further reduces the volume; the open line 220 is used as an input/output electrode, so that the connection between the dielectric waveguide filter and other components is more flexible; further, the port coupling bandwidth of the waveguide filter can be controlled by changing the size of the shorting stub 124, the debugging method is simple, and the tuning can achieve a very wide port coupling bandwidth.
In the above embodiment, the low-pass circuit layer 240 is disposed at any position of the substrate 200, so long as it does not short-circuit with the open circuit 220, the ground layer 210 or the connection line. Of course, in other embodiments, the low-pass circuit layer 240 may also be disposed on the filter body 100.
The low pass circuit layer 240 does not short with other conductive structures.
Based on the above embodiment, as shown in fig. 2, in one embodiment, the substrate 200 is provided with a metal via 230 electrically connecting the open line 220 and the shorting bar 124. The electrical connection of the open wire 220 disposed on the second surface 204 with the shorting wire 124 disposed on the first surface 202 may then be accomplished in the form of a metal via 230, such that the electrical connection of the open wire 220 with the shorting wire 124 is more reliable.
Further, as shown in fig. 2, the first surface 202 is provided with connection wires 250 electrically connected to the shorting bars 124 in a one-to-one correspondence, one connection wire 250 is electrically connected to the open circuit line 220 through the metal via 230, and the other connection wire 250 is electrically connected to one end of the low-pass circuit layer 240 through the metal via 230. Thus, the connection wires 250 can be formed on the substrate 200, and the open circuit 220, the low-pass circuit layer and the metal vias 230 are manufactured by using the printed circuit board technology, and then the input/output electrodes are obtained by using the connection wires 250 to electrically connect (such as soldering, electric bonding, etc.) with the shorting wires 124 to integrate the printed circuit board with the filter body 100, so that the structures on the filter body 100 and the substrate 200 can be separately designed and manufactured and then combined, thereby improving the production efficiency and ensuring the performance of the waveguide filter (avoiding excessive manufacturing procedures on the filter body 100).
Specifically, as shown in fig. 2, in one embodiment, the shape of the connecting wire 250 is the same as or similar to the shape of the shorting bar 124, and the area of the connecting wire 250 is smaller than the area of the shorting bar 124. In this way, the connection of the connection wire 250 can be avoided, and the port coupling bandwidth of the set dielectric waveguide filter is affected.
The "same shape or similar shape" means that the shapes of the two may be the same or similar, as long as the above requirements are satisfied.
Further, in one embodiment, the connecting wire 250 is welded to the shorting wire 124. Thus, the connection strength between the filter body 100 and the substrate 200 can be ensured.
Of course, in other embodiments, the substrate 200 may be disposed on the filter body 100, and then the ground layer 210, the opening 220, and the metal vias 230 may be fabricated.
Based on any of the above embodiments, as shown in fig. 2, in one embodiment, a first insulation groove 130 is disposed between the first metal layer 110 and the shorting bar 124, and a bottom wall of the first insulation groove 130 is a dielectric layer; the first surface is further provided with a second metal layer 270, the second metal layer 270 is provided with a second insulation groove 280 opposite to the first insulation groove 130, and a metal layer located in the second insulation groove 280 of the second metal layer 270 serves as the connection line 250. Furthermore, the first insulation groove 130 is arranged on the first metal layer 110 and the shorting bar 124 is formed by surrounding, so that the embodiment is simple and reliable, the first metal layer 110 and the shorting bar 124 are ensured to be basically on the same plane, and the manufacturing error is reduced; similarly, the second metal layer 270 is disposed on the first surface of the substrate 200, and the second insulation groove 280 is disposed on the second metal layer 270, and the connection line 250 is formed by surrounding, so that the bonding tightness of the first metal layer 110 and the second metal layer 270 is improved, and meanwhile, the bonding between the shorting bar 124 and the connection line 250 is firm by welding the first metal layer 110 and the second metal layer 270, and the shorting bar 124 and the connection line 250. In addition, the adjustment of the port coupling bandwidth of the dielectric waveguide filter can be realized by only processing the shorting bars 124 or/and the first insulation grooves 130 with different sizes, and the adjustment mode is simple and easy to implement.
Specifically, as shown in fig. 2, in an embodiment, the shape of the second insulation groove 280 is the same as the shape of the first insulation groove 130 (allowing for manufacturing errors), and the area of the second insulation groove 280 is larger than the area of the first insulation groove 130; the shape of the connection line 250 is the same as the shape of the shorting line 124 (allowing for manufacturing errors), and the area of the connection line 250 is smaller than the area of the shorting line 124. In this way, the connection of the connection wire 250 can be avoided, and the port coupling bandwidth of the set dielectric waveguide filter is affected. The second insulating groove 280 and the first insulating groove 130, and the connecting wire 250 and the shorting bar 124, which are of similar patterns (same shape but different sizes).
Specifically, the thicknesses of the first metal layer 110 and shorting bar 124 are equal or approximately equal (allowing for some manufacturing errors).
In addition, in one embodiment, a dielectric filling layer is disposed in the first insulation groove 130. The port coupling bandwidth of the dielectric waveguide filter can thus be adjusted by filling the dielectric filling layer in the first insulation groove 130. The dielectric fill layer may be a gaseous medium, a solid medium, or the like.
Based on any of the above embodiments, in one embodiment, the material of the filter body 100 is a ceramic dielectric material.
Based on any of the above embodiments, in one embodiment, the substrate 200 is provided with at least two metal vias 230 and a wire 260 electrically connected to two of the metal vias, one end of the wire 260 is electrically connected to the connection wire 250 through one of the metal vias 230, and the other end of the wire 260 is electrically connected to the open circuit 220 through the other metal via 230. Thus, the open line 220 can be flexibly arranged on the ground layer, and interference of other lines is avoided. The wires 260 may be disposed in the substrate 200 and electrically connected to the connection wires 250 and the open circuit 220 by metal vias. The specific number of the wires may be set according to actual needs, and is not limited herein.
In an embodiment, an antenna is further provided, including the above-mentioned filter, where the material of the filter body 100 is a ceramic medium with a high dielectric constant.
The dielectric waveguide filter utilizes the dielectric waveguide filter, can solve the problems that the ceramic body of the ceramic waveguide is high in hardness and unchangeable after processing and forming, and the port coupling bandwidth is difficult to adjust, and meanwhile, the input and output structure is more reliably connected and fixed, so that the reliability of the overall performance is guaranteed; and the volume of the antenna can be further reduced, which is beneficial to the miniaturization development of the base station antenna. In addition, the dielectric waveguide filter can effectively solve the problem of over-narrow out-of-band rejection width, and is beneficial to ensuring the reliability of the overall performance.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. A dielectric waveguide filter, comprising:
the filter comprises a filter body, wherein a first metal layer serving as an electric wall and a short circuit layer are arranged on the outer wall of the filter body, the short circuit layer comprises a connecting end electrically connected with the first metal layer and a short circuit wire connected with the connecting end, a first insulation groove is arranged between the first metal layer and the short circuit wire, and the bottom wall of the first insulation groove is a dielectric layer; and
And one end of the low-pass circuit layer is electrically connected with the shorting bar, and the other end of the low-pass circuit layer is provided with an input and output connecting end.
2. The dielectric waveguide filter of claim 1, wherein the low-pass circuit layer is a strip line, the strip line being provided with a filtering stub.
3. The dielectric waveguide filter of claim 1, wherein the low-pass circuit layer is disposed on the filter body.
4. The dielectric waveguide filter of claim 1, wherein the shorting layers comprise two shorting layers spaced apart from each other; the dielectric waveguide filter further comprises a substrate which is arranged opposite to the filter body, the substrate comprises a first surface which is arranged opposite to the first metal layer and a second surface which is arranged opposite to the first surface, the second surface is provided with a grounding layer and two open lines which are arranged in an insulating manner with the grounding layer, one open line is electrically connected with a corresponding short line and forms an input/output electrode, one end of the low-pass circuit layer is electrically connected with the other short line, and the input/output connection end is electrically connected with the open line and forms the other input/output electrode.
5. The dielectric waveguide filter of claim 4, wherein the low pass circuit layer is disposed on the substrate.
6. The dielectric waveguide filter according to claim 4, wherein the first surface is provided with connection lines electrically connected to the shorting lines in a one-to-one correspondence, one of the connection lines being electrically connected to the open line, and the other of the connection lines being electrically connected to one end of the low-pass circuit layer.
7. The dielectric waveguide filter according to claim 4, wherein the substrate is further provided with at least two of the metal vias and a wire electrically connecting two of the metal vias, one end of the wire is electrically connected to the connection line through one of the metal vias, and the other end of the wire is electrically connected to the opening line through the other of the metal vias.
8. The dielectric waveguide filter of claim 6, wherein the shape of the connection line is the same as or similar to the shape of the shorting line, and the area of the connection line is smaller than the area of the shorting line.
9. A dielectric waveguide filter according to any one of claims 1 to 8, wherein a dielectric filling layer is provided in the first insulating recess.
10. An antenna comprising a dielectric waveguide filter according to any one of claims 1 to 9, wherein the filter body is made of a ceramic medium having a high dielectric constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811322430.XA CN109672011B (en) | 2018-11-08 | 2018-11-08 | Antenna and dielectric waveguide filter thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811322430.XA CN109672011B (en) | 2018-11-08 | 2018-11-08 | Antenna and dielectric waveguide filter thereof |
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| Publication Number | Publication Date |
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| CN109672011A CN109672011A (en) | 2019-04-23 |
| CN109672011B true CN109672011B (en) | 2023-08-25 |
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| CN201811322430.XA Active CN109672011B (en) | 2018-11-08 | 2018-11-08 | Antenna and dielectric waveguide filter thereof |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109449546B (en) * | 2018-11-08 | 2023-09-29 | 京信通信技术(广州)有限公司 | Dielectric waveguide filter and input/output structure thereof |
| CN110011010B (en) * | 2019-04-28 | 2024-05-10 | 重庆思睿创瓷电科技有限公司 | Strip line structure for low-pass filter, communication device and system |
| CN110336102B (en) * | 2019-07-09 | 2024-06-21 | 重庆思睿创瓷电科技有限公司 | Dielectric waveguide filter, radio frequency module and base station for improving harmonic performance |
| CN210403982U (en) * | 2019-11-21 | 2020-04-24 | 中兴通讯股份有限公司 | Filtering component, antenna device and base station system |
| US20230147406A1 (en) * | 2020-03-30 | 2023-05-11 | Telefonaktiebolaget Lm Ericsson (Publ) | AU and RU having CWG Filters, and BS having the AU or RU |
| CN114792874B (en) * | 2021-01-25 | 2024-04-02 | 南京以太通信技术有限公司 | Method for manufacturing dielectric filter and method for manufacturing electrode thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07336106A (en) * | 1994-06-13 | 1995-12-22 | Nippon Telegr & Teleph Corp <Ntt> | Terminal coupling filter packaging structure |
| CN102509821A (en) * | 2011-10-09 | 2012-06-20 | 西安电子科技大学 | Dual-mode bi-pass filter based on capacitance loading square resonant rings |
| CN107611540A (en) * | 2017-09-07 | 2018-01-19 | 西安电子科技大学 | One kind is mixed with consumption duplexer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3804407B2 (en) * | 2000-07-07 | 2006-08-02 | 日本電気株式会社 | filter |
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2018
- 2018-11-08 CN CN201811322430.XA patent/CN109672011B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07336106A (en) * | 1994-06-13 | 1995-12-22 | Nippon Telegr & Teleph Corp <Ntt> | Terminal coupling filter packaging structure |
| CN102509821A (en) * | 2011-10-09 | 2012-06-20 | 西安电子科技大学 | Dual-mode bi-pass filter based on capacitance loading square resonant rings |
| CN107611540A (en) * | 2017-09-07 | 2018-01-19 | 西安电子科技大学 | One kind is mixed with consumption duplexer |
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