CN213905564U - Micro-strip filter - Google Patents
Micro-strip filter Download PDFInfo
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- CN213905564U CN213905564U CN202023287113.4U CN202023287113U CN213905564U CN 213905564 U CN213905564 U CN 213905564U CN 202023287113 U CN202023287113 U CN 202023287113U CN 213905564 U CN213905564 U CN 213905564U
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- microstrip
- metal cavity
- dielectric slab
- dielectric
- circuit board
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Abstract
The utility model provides a microstrip filter, including a metal cavity, be provided with three-layer microstrip circuit board in the metal cavity, three-layer microstrip circuit board includes first dielectric slab and second dielectric slab, be provided with the microstrip ground plane that is used for connecting ground between first dielectric slab and the second dielectric slab, first dielectric slab upper surface is provided with many first microstrip lines, second dielectric slab lower surface is provided with many second microstrip lines, metal cavity openly left end is provided with the input connector who is connected with first microstrip line, metal cavity left surface front end is provided with the output connector who is connected with the second microstrip line; the utility model discloses simple structure, the simple operation can reduce the volume and the weight of wave filter.
Description
Technical Field
The utility model relates to a wireless communication technology field, especially a microstrip filter.
Background
With the rapid development of communication technology, various microwave filters are widely used. In some communication systems, each device is required to be small in size and moderate in power capacity. The existing microstrip filter adopts a double-layer microstrip circuit board (one side is used for transmitting signals, and the other side is grounded), and each resonance unit on the board can be coupled on only one side, so that the size is relatively large.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a can inside adopt three-layer microstrip circuit board, through the three-dimensional coupling in upper and lower face, when satisfying corresponding filter index requirement, can reduce the microstrip filter of the volume and the weight of wave filter.
The utility model discloses a following method realizes: a microstrip filter characterized by: the three-layer microstrip circuit board comprises a metal cavity, wherein a three-layer microstrip circuit board is arranged in the metal cavity, the three-layer microstrip circuit board comprises a first dielectric slab and a second dielectric slab, a microstrip grounding surface used for connecting the ground is arranged between the first dielectric slab and the second dielectric slab, the upper surface of the first dielectric slab is provided with a plurality of first microstrip lines, the lower surface of the second dielectric slab is provided with a plurality of second microstrip lines, the front left end of the metal cavity is provided with an input connector connected with the first microstrip lines, and the front end of the left side of the metal cavity is provided with an output connector connected with the second microstrip lines.
Furthermore, the input connector is fixed on the left side face of the metal cavity through a metal screw, and an inner conductor contact pin of the input connector is connected with the first microstrip line through welding.
Furthermore, the output connector is fixed at the left end of the front face of the metal cavity through a metal screw, and an inner conductor contact pin of the output connector is connected with the second microstrip line through welding.
Furthermore, first threaded holes are formed in the upper left corner, the upper right corner and the lower right corner of the first dielectric plate and the microstrip ground plane, second threaded holes are formed in the upper left corner, the lower left corner and the upper right corner of the second dielectric plate, and the first dielectric plate, the second dielectric plate and the microstrip ground plane are mounted in the middle of the metal cavity under the action of fixing screws.
Furthermore, a coupling window is arranged on the microstrip ground plane.
The beneficial effects of the utility model reside in that: the utility model adds the first dielectric plate, the second dielectric plate, the microstrip grounding surface, the first microstrip line and the second microstrip line into the device, which can increase the order of the filter, improve the attenuation amplitude of the stop band signal and greatly improve the performance of the filter; the coupling window is added in the device, so that the first microstrip line and the second microstrip line can be conveniently coupled; the utility model discloses simple structure, the simple operation when satisfying corresponding wave filter index requirement, can reduce the volume and weight, the reduce cost of wave filter, convenient to use, but wide application is in each miniaturized communication system.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the internal structure of the present invention.
Fig. 3 is a schematic structural diagram of the first dielectric plate, the second dielectric plate and the microstrip ground plane in cooperation.
Fig. 4 is a schematic structural view of the upper surface of the first dielectric plate.
Fig. 5 is a schematic structural view of the lower surface of the second dielectric plate.
Fig. 6 is a schematic structural diagram of the microstrip ground plane.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1 to 6, the present invention provides an embodiment: including a metal cavity 1, be provided with three-layer microstrip circuit board in the metal cavity 1, three-layer microstrip circuit board includes first dielectric slab 2 and second dielectric slab 3, first dielectric slab 2 with be provided with the microstrip ground plane 4 that is used for connecting ground between the second dielectric slab 3, first dielectric slab 2 upper surface is provided with many first microstrip lines 21, 3 lower surfaces of second dielectric slab are provided with many second microstrip lines 31, the positive left end of metal cavity 1 be provided with input connector 5 that first microstrip line 21 is connected, 1 left surface front end of metal cavity be provided with output connector 6 that second microstrip line 31 is connected. The communication transmission is realized by the action of the first microstrip line 21 and the second microstrip line 31 through the action of the first dielectric plate 2, the second dielectric plate 3 and the microstrip ground plane 4, and the signal transmission communication is realized by the action of the input connector 5 and the output connector 6.
As shown in fig. 1 to fig. 3, in an embodiment of the present invention, the input connector 5 is fixed on the left side surface of the metal cavity 1 by a metal screw, and an inner conductor pin of the input connector 5 is connected to the first microstrip line 21 by welding. So that an external signal is inputted by the action of the input connector 5.
As shown in fig. 1, fig. 2 and fig. 5, in an embodiment of the present invention, the output connector 6 is fixed at the left end of the front surface of the metal cavity 1 by a metal screw, and an inner conductor pin of the output connector 6 is connected to the second microstrip line 31 by welding. So that the signal can be output by the action of the output connector 6.
As shown in fig. 2 to fig. 6, in an embodiment of the present invention, first threaded holes 22 are disposed on the upper left corner, the upper right corner and the lower right corner of the first dielectric plate 2 and the microstrip ground plane 4, second threaded holes 32 are disposed on the upper left corner, the lower left corner and the upper right corner of the second dielectric plate 3, and the first dielectric plate 2, the second dielectric plate 3 and the microstrip ground plane 4 are mounted in the middle of the metal cavity 1 under the action of fixing screws 33. The first dielectric plate 2, the second dielectric plate 3 and the microstrip ground plane 4 can be fixed together from top to bottom in the middle of the metal cavity 1 by the action of the fixing screws 33 through the action of the first threaded holes 22 and the second threaded holes 32.
Please refer to fig. 6, in an embodiment of the present invention, a coupling window 41 is disposed on the microstrip ground plane 4. So that the coupling of the signal from the first microstrip line in the middle to the second microstrip line in the middle can be facilitated by the action of the coupling window 41, the size and position of the coupling window 41 being determined by the relative bandwidth of the filter.
The input connector and the output connector of the present invention may be SAM type connectors, but are not limited thereto, and those skilled in the art will clearly understand that they will not be described in detail herein.
In a word, the utility model discloses a key feature is to utilize three-layer microstrip board to realize each resonance unit of wave filter on plane and spatial structure's coupling to further reduce the volume of wave filter, use on in order to satisfy miniaturized communication equipment.
The above is only the preferred embodiment of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.
Claims (5)
1. A microstrip filter characterized by: the three-layer microstrip circuit board comprises a metal cavity, wherein a three-layer microstrip circuit board is arranged in the metal cavity, the three-layer microstrip circuit board comprises a first dielectric slab and a second dielectric slab, a microstrip grounding surface used for connecting the ground is arranged between the first dielectric slab and the second dielectric slab, the upper surface of the first dielectric slab is provided with a plurality of first microstrip lines, the lower surface of the second dielectric slab is provided with a plurality of second microstrip lines, the front left end of the metal cavity is provided with an input connector connected with the first microstrip lines, and the front end of the left side of the metal cavity is provided with an output connector connected with the second microstrip lines.
2. A microstrip filter according to claim 1 wherein: the input connector is fixed on the left side face of the metal cavity through a metal screw, and an inner conductor contact pin of the input connector is connected with the first microstrip line through welding.
3. A microstrip filter according to claim 1 wherein: the output connector is fixed at the left end of the front face of the metal cavity through a metal screw, and an inner conductor contact pin of the output connector is connected with the second microstrip line through welding.
4. A microstrip filter according to claim 1 wherein: first screw holes are formed in the upper left corner, the upper right corner and the lower right corner of the first dielectric plate and the microstrip ground plane, second screw holes are formed in the upper left corner, the lower left corner and the upper right corner of the second dielectric plate, and the first dielectric plate, the second dielectric plate and the microstrip ground plane are mounted in the middle of the metal cavity under the action of fixing screws.
5. A microstrip filter according to claim 1 wherein: the microstrip grounding surface is provided with a coupling window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023287113.4U CN213905564U (en) | 2020-12-30 | 2020-12-30 | Micro-strip filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023287113.4U CN213905564U (en) | 2020-12-30 | 2020-12-30 | Micro-strip filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213905564U true CN213905564U (en) | 2021-08-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023287113.4U Active CN213905564U (en) | 2020-12-30 | 2020-12-30 | Micro-strip filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213905564U (en) |
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2020
- 2020-12-30 CN CN202023287113.4U patent/CN213905564U/en active Active
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