CN211045679U - Coupler - Google Patents
Coupler Download PDFInfo
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- CN211045679U CN211045679U CN201921457225.4U CN201921457225U CN211045679U CN 211045679 U CN211045679 U CN 211045679U CN 201921457225 U CN201921457225 U CN 201921457225U CN 211045679 U CN211045679 U CN 211045679U
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Abstract
The utility model discloses a coupler sets up the signal hole through four angles at the coupler, four limits set up the ground hole, set up on the coupling line figure layer of coupler and correspond and connect the first signal pad and the second signal pad in signal hole with the signal hole, and correspond and connect the ground pad in ground hole with the ground hole, wherein the both ends of the coupling stripline of coupler set up two first signal pads, the ground pad is close to two first signal pads, and set up the both sides at the coupling stripline, wherein first signal pad, second signal pad and ground pad are with a central point symmetry on coupling line figure layer. Therefore, the isolation among the coupler ports is enhanced through the interaction among the grounding bonding pad, the first signal bonding pad, the second signal bonding pad and the coupling strip line, and the performance index of the coupler is further improved.
Description
Technical Field
The utility model relates to a coupler design technical field, more specifically say, especially relate to a coupler.
Background
As a commonly used passive device in communication systems, couplers, particularly 3dB couplers, are widely used in radio frequency, microwave circuits and communication systems. The coupler is a general microwave/millimeter wave component, and can be used for separating and synthesizing signals. The 3dB coupler can continuously sample transmission power along a certain determined direction of a transmission line, can divide an input signal into two signals which are mutually equal in amplitude and have a phase difference of 90 degrees, can also be used for multi-signal synthesis, and improves the utilization rate of an output signal. The 3dB couplers may also be used in power amplifiers, low noise amplifiers, adjustable phase shifters and adjustable attenuators. In practical applications, the process difficulty of the 3dB coupler mainly relates to the alignment precision of a pair of coupling strip lines in the middle layer, line width and line distance control, and the change of the bonding pad after dielectric lamination, which all affect the performance index of the coupler.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a coupler to reach the effect that solves promotion coupler performance index.
In order to solve the above technical problem, the utility model provides a coupler, include:
the four signal holes are respectively arranged at four corners of the coupler and penetrate through the coupler;
a plurality of ground holes which are respectively arranged on four sides of the coupler and penetrate through the coupler;
at least one pair of coupled line pattern layers, wherein each coupled line pattern layer comprises a coupled strip line and two first signal pads, the two first signal pads are correspondingly connected with two signal holes on one diagonal line of the coupler, and the coupled strip line is arranged in a region between the two first signal pads and is connected between the two first signal pads;
wherein the two first signal pads and the coupling strip line therein are symmetrical with respect to a center point.
Further, each of the coupled line pattern layers further includes two second signal pads connected with the other two signal holes located on the other diagonal line of the coupler, the two second signal pads are not connected with the coupling strip line, and the two second signal pads have the same shape and size and are symmetrical with respect to the center point.
Further, the first signal pad and the second signal pad have different shapes and sizes.
Further, the at least one pair of coupled line pattern layers comprises a first coupled line pattern layer and a second coupled line pattern layer, wherein two first signal pads in the first coupled line pattern layer are correspondingly connected with two signal holes on a first diagonal line of the coupler, and two first signal pads in the second coupled line pattern layer are correspondingly connected with two signal holes on a second diagonal line of the coupler;
the two second signal pads in the first coupled line pattern layer are correspondingly connected with the two signal holes on the second diagonal line of the coupler, and the two second signal pads in the second coupled line pattern layer are correspondingly connected with the two signal holes on the first diagonal line of the coupler.
Further, each of the coupling line pattern layers further includes two ground pads disposed correspondingly close to the two first signal pads, respectively, and located at both sides of the coupling stripline, wherein the two ground pads are connected to two corresponding ground holes of the plurality of ground holes, respectively, and the two ground pads have the same shape and size and are symmetrical with respect to the center point.
Further, the first signal pad, the second signal pad and the ground pad are respectively polygonal and respectively have an arc-shaped edge contacting with the signal hole or the ground hole and a plurality of linear edges, wherein the first signal pad and the ground pad respectively have at least one linear edge parallel to each other, so that the ground pad is arranged close to the ground pad.
Further, the two first signal pads, the two second signal pads and the two ground pads in the first coupled line pattern layer are centrosymmetric to the two first signal pads, the two second signal pads and the two ground pads in the second coupled line pattern layer.
Further, the coupler further includes: the signal holes and the ground holes respectively penetrate through the first core plate, the second core plate and the third core plate;
the first coupling line pattern layer and the second coupling line pattern layer are respectively positioned on two opposite surfaces of the second core plate.
Furthermore, a top graphic layer and a bottom graphic layer are respectively arranged on the outward surfaces of the first core board and the third core board, wherein the top graphic layer and the bottom graphic layer are respectively provided with four signal pads and at least one grounding pad, the four signal pads are respectively and correspondingly connected with the four signal holes, and the grounding pad is sequentially connected with the plurality of ground holes.
Wherein the four signal pads in the top graphics layer and the top graphics layer have the same shape and size.
Further, the signal hole and the ground hole inner wall are provided with metal walls, and the average thickness of the metal walls is 20 micrometers.
The utility model has the advantages that: the signal holes are arranged at four corners of the coupler, the ground holes are arranged at four sides of the coupler, the first signal pad and the second signal pad which correspond to the signal holes and are connected with the signal holes and the ground pad which corresponds to the ground holes and is connected with the ground holes are arranged on the coupling line pattern layer of the coupler, two first signal pads are arranged at two ends of the coupling strip line of the coupler, the ground pads are close to the two first signal pads and are arranged at two sides of the coupling strip line, and the first signal pad, the second signal pad and the ground pad are symmetrical with a center point of the coupling line pattern layer. Therefore, the isolation degree among the coupler ports is enhanced through the interaction among the grounding bonding pad, the first signal bonding pad and the second signal bonding pad, and the performance index of the coupler is further improved.
Drawings
Fig. 1 is a block diagram of a cross-sectional structure of a coupler according to the present invention;
fig. 2 is a schematic diagram of the coupler structure of the present invention;
fig. 3 is a schematic diagram of a top pattern layer structure of the coupler of the present invention;
fig. 4a is a schematic structural diagram of a first coupled line pattern layer according to the present invention;
fig. 4b is a schematic structural diagram of a second coupling line pattern layer according to the present invention;
fig. 5 is a schematic diagram of a bottom pattern layer structure of the coupler of the present invention;
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Fig. 1 is a block diagram of a cross-sectional structure of a coupler according to the present invention. Please refer to fig. 2, a schematic diagram of a coupler according to the present invention. The utility model provides a coupler 1, it is specific, coupler 1 includes first core plate 3, second core plate 30 and third core plate 31 of top-down with this range upon range of setting. The first core board 3, the second core board 30 and the third core board 31 are bonded through dielectric layers. In one embodiment, the dielectric layer is a prepreg 4. The first core board 3, the second core board 30 and the third core board 31 are all copper clad boards, in a specific embodiment, the upper and lower surfaces of the second core board 30 are both provided with metal layers, and one uniform surface of the first core board 3 and the third core board 31 is provided with a metal layer, and the metal layer is a copper foil. The metal layers on the surfaces of the first core board 3 and the third core board 31 are both far away from the second core board 30.
Wherein, four corners of the coupler 1 are provided with signal holes 8, and the signal holes 8 penetrate through the first core plate 3, the second core plate 30 and the third core plate 31 of the coupler 1. A plurality of ground holes 9 are provided on four sides of the coupler 1, and the ground holes 9 penetrate through the first core plate 3, the second core plate 30 and the third core plate 31 of the coupler 1. In one embodiment, there may be a plurality of ground holes 9 on one edge, or there may be one ground hole 9, and in this embodiment, the inner walls of the signal hole 8 and the ground hole 9 are plated with copper, and the thickness of the copper is 20 μm.
The first core board 3 of the coupler 1 includes a top graphic layer 2 far from the second core board 30, please refer to fig. 1, and the top graphic layer 2 is located on a metal layer of a surface of the first core board 3 far from the second core board 30.
In one embodiment, the top pattern layer 2 includes four signal pads 10 connected to four signal holes 8 at four corners of the coupler 1 and at least one ground pad 11 connected to a plurality of ground holes 9 at four sides of the coupler 1, the ground pad 11 is a one-piece metal layer, i.e., a copper layer, and corresponds to the ground hole 9 at the side. The four signal pads 10 are identical in shape and size.
Wherein the second core board 30 of the coupler 1 comprises at least one pair of coupled line pattern layers (as shown in fig. 4a and 4 b). In an embodiment, the at least one pair of coupled line pattern layers comprises a first coupled line pattern layer 51 (fig. 4a) and a second coupled line pattern layer 52 (fig. 4 b).
As shown in fig. 4a, the first coupled line pattern layer 51 includes two first signal pads 101 located on a first diagonal line and two second signal pads 102 located on a second diagonal line. Wherein, the two first signal pads 101 have a coupling strip line 7 connected to them. The first coupled line pattern layer 51 further includes two ground pads 111 located between the adjacent first signal pads 101 and second signal pads 102. In one embodiment, two ground pads 111 are located on the short sides of the coupler 1. The first signal pads 101 have the same shape and size, the second signal pads 102 have the same shape and size, and the ground pads 111 have the same shape and size. Wherein the two first signal pads 101 and the second signal pads 102 have different shapes and sizes.
In one embodiment, the first signal pad 101, the second signal pad 102 and the ground pad 111 are all polygonal, and the positions where the first signal pad contacts the signal hole 8 or the ground hole 9 are arc-shaped edges matching the signal hole 8 or the ground hole 9, and the rest are straight edges.
The position of the ground pad 111 adjacent to the first signal pad 101 has a straight edge parallel to one edge of the first signal pad 101, and the position of the ground pad 111 adjacent to the second signal pad 102 has a straight edge parallel to one edge of the second signal pad 102, so that the area of the ground pad 111 is increased as much as possible, the isolation between the ports of the coupler 1 is enhanced through the interaction between the ground pad 111 and the signal pads, and the performance index of the coupler 1 is further improved.
Wherein the two first signal pads 101, the two second signal pads 102, and the two ground pads 111 are symmetrical with respect to a center point of the first coupled line pattern layer 51. Specifically, as shown in fig. 4a, the first signal pad 101, the second signal pad 102 and the ground pad 111 on the left side of the first coupled line pattern layer 51 are rotated 180 degrees along the center point to coincide with the first signal pad 101, the second signal pad 102 and the ground pad 111 on the right side.
As shown in fig. 4b, the second coupled line pattern layer 52 includes two first signal pads 101 located on the second diagonal line and two second signal pads 102 located on the first diagonal line. Wherein, the two first signal pads 101 have a coupling strip line 7 connected to them. The second coupled line pattern layer 52 further includes two ground pads 111 located between the adjacent first signal pads 101 and second signal pads 102. In one embodiment, two ground pads 111 are located on the short sides of the coupler 1. The first signal pads 101 have the same shape and size, the second signal pads 102 have the same shape and size, and the ground pads 111 have the same shape and size. Wherein the two first signal pads 101 and the second signal pads 102 have different shapes and sizes.
In one embodiment, the first signal pad 101, the second signal pad 102 and the ground pad 111 are all polygonal, and the positions where the first signal pad contacts the signal hole 8 or the ground hole 9 are arc-shaped edges matching the signal hole 8 or the ground hole 9, and the rest are straight edges.
The position of the ground pad 111 adjacent to the first signal pad 101 has a straight edge parallel to one edge of the first signal pad 101, and the position of the ground pad 111 adjacent to the second signal pad 102 has a straight edge parallel to one edge of the second signal pad 102, so that the area of the ground pad 111 is increased as much as possible, the isolation between the ports of the coupler 1 is enhanced through the interaction between the ground pad 111 and the signal pads, and the performance index of the coupler 1 is further improved.
Wherein the second coupled line pattern layer 52 has two first signal pads 101, two second signal pads 102, and two ground pads 111 point-symmetrical with respect to a center of the second coupled line pattern layer 52. Specifically, as shown in fig. 4b, the first signal pad 101, the second signal pad 102 and the ground pad 111 on the left side of the second coupled line pattern layer 52 are rotated 180 degrees along the center point to coincide with the first signal pad 101, the second signal pad 102 and the ground pad 111 on the right side.
In an embodiment, the first coupled line pattern layer 51 is symmetrical to the second coupled line pattern layer 52, and specifically, as shown in fig. 3 and 4, the first coupled line pattern layer 51 is rotated 180 degrees along a center point to coincide with the second coupled line pattern layer 52.
Referring to fig. 5, the third core board 31 of the coupler 1 includes a bottom graphic layer 6 far from the second core board 30, and the bottom graphic layer 6 is located on a metal layer of a surface of the third core board 31 far from the second core board 30.
In one embodiment, the bottom pattern layer 6 includes four signal pads 10 connected to the four signal holes 8 at the four corners of the coupler 1 and at least one ground pad 11 connected to the ground holes 9 at the four sides of the coupler 1, and the ground pad 11 is a whole metal layer, i.e., a copper layer, and corresponds to the ground hole 9 at the side. The four signal pads 10 are identical in shape and size.
In one embodiment, the top graphics layer 2 is symmetrical to the bottom graphics layer 6. In particular, as shown in fig. 3 and 5, the top graphics layer 2 completely coincides with the bottom graphics layer 6.
The coupler also includes other devices, which are the same as other devices and functions of the coupler in the prior art, and are not described in detail herein.
The coupler in this embodiment has a pair of coupled line pattern layers, and in other embodiments, there may be more pairs of coupled line pattern layers, which are not described herein again.
The utility model provides a coupler sets up first signal pad and second signal pad through the position that corresponds the signal hole on the coupling line graphic layer of coupler, and the position that corresponds the ground hole sets up the ground connection pad. Specifically, the first signal pad is located on a first diagonal line of the coupler and connected with a coupling strip line of the coupler, the second signal pad is located on a second diagonal line of the coupler and not connected with the coupling strip line of the coupler, the ground pad is arranged between the first signal pad and the second signal pad and located on two sides of a connection point of the coupling strip line and the first signal pad, the second signal pad and the ground pad are symmetrical with a center point of the coupling line pattern layer, so that the isolation of a coupler port is enhanced through interaction between the ground pad and the first signal pad and the second signal pad, and further the performance index of the coupler is enhanced.
The above is only the embodiment of the present invention, not the limitation of the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A coupler, comprising:
the four signal holes are respectively arranged at four corners of the coupler and penetrate through the coupler;
a plurality of ground holes respectively arranged on four sides of the coupler and penetrating through the coupler;
at least one pair of coupled line pattern layers, wherein each coupled line pattern layer comprises a coupled strip line and two first signal pads, the two first signal pads are correspondingly connected with the two signal holes on one diagonal of the coupler, and the coupled strip line is arranged in a region between the two first signal pads and is connected between the two first signal pads;
wherein two of the first signal pads and the coupling striplines therein are symmetrical with respect to a center point.
2. The coupler of claim 1, wherein each of the coupled line pattern layers further comprises two second signal pads, wherein two of the second signal pads are connected to two other of the signal holes located on another diagonal of the coupler, wherein two of the second signal pads are not connected to the coupling stripline, and wherein the two second signal pads have the same shape and size and are symmetrical with respect to the center point.
3. The coupler of claim 2, wherein the first signal pad and the second signal pad have different shapes and sizes.
4. The coupler of claim 2, wherein the at least one pair of coupled line pattern layers comprises a first coupled line pattern layer and a second coupled line pattern layer, wherein two of the first signal pads in the first coupled line pattern layer are connected to two of the signal holes on a first diagonal of the coupler, and two of the first signal pads in the second coupled line pattern layer are connected to two of the signal holes on a second diagonal of the coupler;
two second signal pads in the first coupled line pattern layer are correspondingly connected with two signal holes on a second diagonal line of the coupler, and two second signal pads in the second coupled line pattern layer are correspondingly connected with two signal holes on a first diagonal line of the coupler.
5. The coupler of claim 4, wherein each of the coupled line pattern layers further comprises two ground pads disposed adjacent to two of the first signal pads, respectively, and on both sides of the coupled stripline, wherein the two ground pads are connected to two of the ground vias, respectively, and the two ground pads have the same shape and size and are symmetrical with respect to the center point.
6. The coupler of claim 5, wherein the first signal pad, the second signal pad, and the ground pad are each polygonal having an arcuate side contacting the signal aperture or the ground aperture and a plurality of linear sides, wherein the first signal pad and the ground pad each have at least one linear side parallel to each other such that the ground pad is disposed proximate to the ground pad.
7. The coupler of claim 5, wherein two of the first signal pads, two of the second signal pads, and two of the ground pads in the first coupled line pattern layer are centrosymmetric to two of the first signal pads, two of the second signal pads, and two of the ground pads in the second coupled line pattern layer.
8. The coupler of claim 5, wherein the coupler further comprises: the signal hole and the ground hole respectively penetrate through the first core plate, the second core plate and the third core plate;
the first coupling line pattern layer and the second coupling line pattern layer are respectively positioned on two opposite surfaces of the second core board.
9. The coupler of claim 8, wherein the first core board and the third core board are respectively provided with a top graphic layer and a bottom graphic layer on outward surfaces thereof, wherein the top graphic layer and the bottom graphic layer are respectively provided with four signal pads and at least one ground pad, the four signal pads are respectively correspondingly connected with the four signal holes, and the ground pad is sequentially connected with the plurality of ground holes;
wherein the four signal pads in the top graphics layer and the bottom graphics layer have the same shape and size.
10. The coupler of claim 1, wherein the signal aperture and the ground aperture inner wall are provided with metal walls, and wherein the average thickness of the metal walls is 20 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921457225.4U CN211045679U (en) | 2019-09-02 | 2019-09-02 | Coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921457225.4U CN211045679U (en) | 2019-09-02 | 2019-09-02 | Coupler |
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| Publication Number | Publication Date |
|---|---|
| CN211045679U true CN211045679U (en) | 2020-07-17 |
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| CN201921457225.4U Active CN211045679U (en) | 2019-09-02 | 2019-09-02 | Coupler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114615790A (en) * | 2020-12-09 | 2022-06-10 | 深南电路股份有限公司 | Coupler and electronic equipment |
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2019
- 2019-09-02 CN CN201921457225.4U patent/CN211045679U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114615790A (en) * | 2020-12-09 | 2022-06-10 | 深南电路股份有限公司 | Coupler and electronic equipment |
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