CN210379362U - Ceramic filter for communication antenna - Google Patents
Ceramic filter for communication antenna Download PDFInfo
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- CN210379362U CN210379362U CN201922032009.1U CN201922032009U CN210379362U CN 210379362 U CN210379362 U CN 210379362U CN 201922032009 U CN201922032009 U CN 201922032009U CN 210379362 U CN210379362 U CN 210379362U
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Abstract
A communication antenna ceramic filter is provided with a rectangular ceramic dielectric block, wherein recessed resonant grooves are formed in the position, close to four corners, of the ceramic dielectric block, a first resonant groove is connected with an input terminal, and a fourth resonant groove is connected with an output terminal; the outer surface of the ceramic dielectric block, the bottom wall and the inner side wall of the resonant tank are respectively plated with a conductive layer, and gaps are reserved between the input terminal and the conductive layer and between the output terminal and the conductive layer; a first inductance equivalent piece is arranged between the first resonant tank and the second resonant tank, a first capacitance equivalent piece is arranged between the second resonant tank and the third resonant tank, a second inductance equivalent piece is arranged between the third resonant tank and the fourth resonant tank, and a third inductance equivalent piece is arranged between the fourth resonant tank and the first resonant tank; and a fourth inductance equivalent piece is arranged between the first resonance groove and the third resonance groove which are diagonally opposite, or between the second resonance groove and the fourth resonance groove. Therefore, the crosstalk can be reduced, the signal trend guiding function can be achieved, and the signal strength can be increased.
Description
Technical Field
The utility model relates to a 5G communication antenna technical field, especially a communication antenna ceramic filter.
Background
With the development of communication technology, the 5 th generation communication system is going to be commercially available. The characteristics of low time delay and high bandwidth of the 5G communication system provide a better platform for people's life and the application of the Internet of things. The 5G communication system improves signal coverage by introducing an active antenna array (the number of cooperative antennas on the base station side can support up to 128), and 128 filters are connected behind each antenna, which puts requirements on miniaturization of the filters. The high dielectric and low loss characteristics of the dielectric ceramic filter are very suitable for being applied to a 5G communication system. Compared with the traditional metal filter, the volume of the dielectric ceramic filter can be reduced to about 1/5.
The existing ceramic filter of the communication antenna is provided with a plurality of resonators, wherein the resonators form a main path matrix according to sequential trends, two diagonal resonators form a cross path, the first resonator is connected with an input end, and the last resonator is connected with an output end.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a can reduce to crosstalk, can play signal trend guide effect, increase signal strength's communication antenna ceramic filter to solve above-mentioned problem.
A communication antenna ceramic filter is provided with a rectangular ceramic dielectric block, wherein a first resonance groove, a second resonance groove, a third resonance groove and a fourth resonance groove which are sunken are sequentially arranged at the positions, close to four corners, of the ceramic dielectric block in a clockwise direction, wherein the first resonance groove is connected with an input terminal, and the fourth resonance groove is connected with an output terminal; conductive layers are plated on the outer surface of the ceramic dielectric block, the bottom wall and the inner side wall of the first resonant groove, the second resonant groove, the third resonant groove and the fourth resonant groove, and gaps are reserved between the input terminal and the conductive layer and between the output terminal and the conductive layers; a first inductance equivalent piece is arranged between the first resonant tank and the second resonant tank, a first capacitance equivalent piece is arranged between the second resonant tank and the third resonant tank, a second inductance equivalent piece is arranged between the third resonant tank and the fourth resonant tank, and a third inductance equivalent piece is arranged between the fourth resonant tank and the first resonant tank; and a fourth inductance equivalent piece is arranged between the first resonance groove and the third resonance groove which are diagonally opposite, or between the second resonance groove and the fourth resonance groove.
Furthermore, the first inductor equivalent piece, the second inductor equivalent piece, the third inductor equivalent piece and the fourth inductor equivalent piece are realized through a T-shaped through groove formed in the middle of the ceramic dielectric block, the T-shaped through groove comprises a vertical groove and a transverse groove vertically communicated with the middle of the vertical groove, and connecting lines between the vertical groove and the third resonant groove are parallel.
Further, the degree that the transverse groove stretches into between fourth resonance groove and the first resonance groove is greater than the degree that the vertical groove stretches to between first resonance groove and the second resonance groove, and stretches to between third resonance groove and the fourth resonance groove.
Furthermore, the first capacitor and the equivalent part are realized through a blind hole arranged between the second resonance groove and the third resonance groove, and the bottom wall and the inner side wall of the blind hole are plated with conducting layers.
Furthermore, the input terminal and the output terminal are arranged on one side of the ceramic dielectric block, which is far away from the first resonant groove, the second resonant groove, the third resonant groove and the fourth resonant groove.
Compared with the prior art, the communication antenna ceramic filter of the utility model is provided with a rectangular ceramic dielectric block, the ceramic dielectric block is provided with a first resonance groove, a second resonance groove, a third resonance groove and a fourth resonance groove which are sunken in sequence according to the clockwise direction near four corners, wherein the first resonance groove is connected with an input terminal, and the fourth resonance groove is connected with an output terminal; conductive layers are plated on the outer surface of the ceramic dielectric block, the bottom wall and the inner side wall of the first resonant groove, the second resonant groove, the third resonant groove and the fourth resonant groove, and gaps are reserved between the input terminal and the conductive layer and between the output terminal and the conductive layers; a first inductance equivalent piece is arranged between the first resonant tank and the second resonant tank, a first capacitance equivalent piece is arranged between the second resonant tank and the third resonant tank, a second inductance equivalent piece is arranged between the third resonant tank and the fourth resonant tank, and a third inductance equivalent piece is arranged between the fourth resonant tank and the first resonant tank; and a fourth inductance equivalent piece is arranged between the first resonance groove and the third resonance groove which are diagonally opposite, or between the second resonance groove and the fourth resonance groove. Therefore, the crosstalk can be reduced, the signal trend guiding function can be achieved, and the signal strength can be increased.
Drawings
Embodiments of the present invention are described below with reference to the accompanying drawings, in which:
fig. 1 is a schematic topology diagram of the ceramic filter for communication antenna provided by the present invention.
Fig. 2 is a schematic top view of the ceramic filter for a communication antenna provided by the present invention.
Detailed Description
The following describes in further detail specific embodiments of the present invention based on the drawings. It should be understood that the description herein of embodiments of the invention is not intended to limit the scope of the invention.
Referring to fig. 1, the present invention provides a ceramic filter for communication antenna, which has a rectangular ceramic dielectric block 10, wherein the ceramic dielectric block 10 is disposed at four corners in a clockwise direction, and has a first resonant tank a, a second resonant tank B, a third resonant tank C, and a fourth resonant tank D, wherein the first resonant tank a is connected to an input terminal in, and the fourth resonant tank D is connected to an output terminal out.
The outer surface of the ceramic dielectric block 10, the bottom wall and the inner side wall of the first resonant groove A, the second resonant groove B, the third resonant groove C and the fourth resonant groove D are respectively plated with a conductive layer, and gaps are reserved between the input terminal in and the output terminal out and the conductive layers, so that the input terminal in and the output terminal out are isolated from the conductive layers. The gap is achieved by leaving white. In the present embodiment, the input terminal in and the output terminal out are provided on the side of the ceramic dielectric block 10 away from the first resonant groove a, the second resonant groove B, the third resonant groove C, and the fourth resonant groove D.
A first inductance equivalent piece L1 is arranged between the first resonant tank A and the second resonant tank B, so that inductive coupling between the first resonant tank A and the second resonant tank B is realized; a first capacitance equivalent piece C1 is arranged between the second resonant tank B and the third resonant tank C, so that capacitive coupling between the second resonant tank B and the third resonant tank C is realized; a second inductance equivalent piece L2 is arranged between the third resonant tank C and the fourth resonant tank D, so that inductive coupling between the third resonant tank C and the fourth resonant tank D is realized; a third inductance equivalent piece L3 is arranged between the fourth resonant tank D and the first resonant tank A, so that inductive coupling between the fourth resonant tank D and the first resonant tank A is realized; a fourth inductance equivalent piece L4 is arranged between the first resonance groove a and the third resonance groove C, or between the second resonance groove B and the fourth resonance groove D, which are diagonally opposite, so that inductive coupling between the first resonance groove a and the third resonance groove C, or between the second resonance groove B and the fourth resonance groove D is realized.
Referring to fig. 2, in the present embodiment, the first inductance equivalent piece L1, the second inductance equivalent piece L2, the third inductance equivalent piece L3 and the fourth inductance equivalent piece L4 are implemented by a T-shaped through slot 30 opened in the middle of the ceramic dielectric block 10, the T-shaped through slot 30 includes a vertical slot 31 and a horizontal slot 32 vertically communicated with the middle of the vertical slot 31, and the vertical slot 31 and the connecting lines between the second resonance slot B and the third resonance slot C are parallel.
The degree of the vertical slot 31 extending between the first resonance slot a and the second resonance slot B can adjust the inductance value of the first inductance equivalent piece L1 between the first resonance slot a and the second resonance slot B; the degree to which the vertical groove 31 extends between the third resonance groove C and the fourth resonance groove D can adjust the inductance value of the second inductance equivalent piece L2 between the third resonance groove C and the fourth resonance groove D; the extent to which the lateral groove 32 extends between the fourth resonance groove D and the first resonance groove a can adjust the magnitude of the inductance value of the third inductance equivalent piece L3 between the fourth resonance groove D and the first resonance groove a; the overall width and length of the vertical slot 31 and the vertical slot 31 affect the inductance of the fourth inductance equivalent L4.
The extent to which the lateral groove 32 extends between the fourth resonance groove D and the first resonance groove a is greater than the extent to which the vertical groove 31 extends between the first resonance groove a and the second resonance groove B, and between the third resonance groove C and the fourth resonance groove D.
The first capacitive equivalent element C1 is implemented by a blind hole 20 opened between the second resonant groove B and the third resonant groove C, the bottom wall and the inner side wall of the blind hole 20 are also plated with conductive layers, and the diameter and the depth of the blind hole 20 affect the capacitance value of the first capacitive equivalent element C1.
The T-shaped through grooves 30 are arranged so that signals are transmitted preferentially from the positions, close to the side edges, of the ceramic dielectric blocks 10 and are not transmitted preferentially from the diagonal lines, and therefore crosstalk can be reduced, the signal moving direction guiding effect can be achieved, and the signal strength can be improved.
Compared with the prior art, the utility model discloses a communication antenna ceramic filter has rectangular ceramic dielectric block 10, and ceramic dielectric block 10 has set gradually sunken first resonance groove A, second resonance groove B, third resonance groove C, fourth resonance groove D according to the clockwise near four edges, wherein first resonance groove A is connected with input terminal in, fourth resonance groove D is connected with output terminal out; conductive layers are plated on the outer surface of the ceramic dielectric block 10, the bottom wall and the inner side wall of the first resonant groove A, the second resonant groove B, the third resonant groove C and the fourth resonant groove D, and gaps are reserved between the input terminal in and the output terminal out and the conductive layers; a first inductance equivalence piece L1 is arranged between the first resonance groove A and the second resonance groove B, a first capacitance equivalence piece C1 is arranged between the second resonance groove B and the third resonance groove C, a second inductance equivalence piece L2 is arranged between the third resonance groove C and the fourth resonance groove D, and a third inductance equivalence piece L3 is arranged between the fourth resonance groove D and the first resonance groove A; a fourth inductance equivalent piece L4 is provided between the first resonance groove a and the third resonance groove C, or between the second resonance groove B and the fourth resonance groove D, which are diagonally opposed to each other. Therefore, the crosstalk can be reduced, the signal trend guiding function can be achieved, and the signal strength can be increased.
The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention, and any modification, equivalent replacement or improvement within the spirit of the present invention is encompassed by the claims of the present invention.
Claims (5)
1. A ceramic filter for a communication antenna, comprising: the communication antenna ceramic filter is provided with a rectangular ceramic dielectric block, a first resonance groove, a second resonance groove, a third resonance groove and a fourth resonance groove which are sunken are sequentially arranged at the positions, close to four corners, of the ceramic dielectric block in a clockwise direction, wherein the first resonance groove is connected with an input terminal, and the fourth resonance groove is connected with an output terminal; conductive layers are plated on the outer surface of the ceramic dielectric block, the bottom wall and the inner side wall of the first resonant groove, the second resonant groove, the third resonant groove and the fourth resonant groove, and gaps are reserved between the input terminal and the conductive layer and between the output terminal and the conductive layers; a first inductance equivalent piece is arranged between the first resonant tank and the second resonant tank, a first capacitance equivalent piece is arranged between the second resonant tank and the third resonant tank, a second inductance equivalent piece is arranged between the third resonant tank and the fourth resonant tank, and a third inductance equivalent piece is arranged between the fourth resonant tank and the first resonant tank; and a fourth inductance equivalent piece is arranged between the first resonance groove and the third resonance groove which are diagonally opposite, or between the second resonance groove and the fourth resonance groove.
2. The communications antenna ceramic filter of claim 1, wherein: the first inductor equivalent piece, the second inductor equivalent piece, the third inductor equivalent piece and the fourth inductor equivalent piece are realized through a T-shaped through groove formed in the middle of the ceramic dielectric block, the T-shaped through groove comprises a vertical groove and a transverse groove vertically communicated with the middle of the vertical groove, and connecting lines between the vertical groove and the third resonant groove are parallel.
3. A ceramic filter for a communications antenna according to claim 2, wherein: the degree that the transverse groove stretches into between fourth resonance groove and the first resonance groove is greater than the degree that the vertical groove stretches to between first resonance groove and the second resonance groove, and stretches to between third resonance groove and the fourth resonance groove.
4. The communications antenna ceramic filter of claim 1, wherein: the first capacitor equivalent part is realized through a blind hole arranged between the second resonance groove and the third resonance groove, and the bottom wall and the inner side wall of the blind hole are plated with conducting layers.
5. The communications antenna ceramic filter of claim 1, wherein: the input terminal and the output terminal are arranged on one side, away from the first resonant groove, the second resonant groove, the third resonant groove and the fourth resonant groove, of the ceramic dielectric block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922032009.1U CN210379362U (en) | 2019-11-21 | 2019-11-21 | Ceramic filter for communication antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922032009.1U CN210379362U (en) | 2019-11-21 | 2019-11-21 | Ceramic filter for communication antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210379362U true CN210379362U (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922032009.1U Active CN210379362U (en) | 2019-11-21 | 2019-11-21 | Ceramic filter for communication antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210379362U (en) |
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2019
- 2019-11-21 CN CN201922032009.1U patent/CN210379362U/en active Active
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