CN108242582B - A kind of DGS filter, printed circuit board and filter - Google Patents
A kind of DGS filter, printed circuit board and filter Download PDFInfo
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- CN108242582B CN108242582B CN201611207733.8A CN201611207733A CN108242582B CN 108242582 B CN108242582 B CN 108242582B CN 201611207733 A CN201611207733 A CN 201611207733A CN 108242582 B CN108242582 B CN 108242582B
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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
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
Abstract
The embodiment of the present invention provides a kind of DGS filter, printed circuit board and filter, is related to field of communication technology, DGS filter discrimination on multilayer printed circuit board can be improved.The DGS filter is for being filtered the signal transmitted on target cabling in the first routing layer in printed circuit board；The DGS filter includes: the first reference layer and destination layer being oppositely arranged, which is reference layer different from the first reference layer in printed circuit board, or is routing layer different from the first routing layer in printed circuit board；Wherein, it is provided with DGS plot shape in the first reference layer, the DGS plot shape is symmetrical as symmetry axis using upright projection of the target cabling in the first reference layer；In the periphery of DGS plot shape, the first reference layer and destination layer are provided with N number of ground via hole, the first reference layer is connected to by this N number of ground via hole with the reference locality domain in destination layer.
Description
Technical field
The present embodiments relate to field of communication technology more particularly to a kind of DGS filters, printed circuit board and filtering dress
It sets.
Background technique
Currently, DGS (Defected Ground Structure, defect ground structure) filter in printed circuit board, leads to
It is often that tool effigurate ground defect (Defected is etched on the ground connection substrate of printed circuit board interior cabling layer
Ground), such as it is humorous can to form LC using these defect ground structures for double C-type defect ground structure, U-shaped dumbbell defect ground structure
Vibration structure, to play filter action to the electric signal transmitted in printed circuit board in certain frequency band.
But for multilayer printed circuit board (including the printed circuit board of multiple routing layers and multiple ground connection substrates) shape
At communication substrate, if only on one layer of ground connection substrate be arranged drawbacks described above ground structure, may result in different ground connection substrates
Between generate resonance phenomena, then, DGS filter discrimination can be then substantially reduced, that is to say, that current DGS filtering
Device is not particularly suited for multilayer printed circuit board.
Summary of the invention
The embodiment of the present invention provides a kind of DGS filter, printed circuit board and filter, and multilayered printed electricity can be improved
DGS filter discrimination on the plate of road.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
In a first aspect, the embodiment of the present invention provides a kind of DGS filter, which is applied to printed circuit board,
The printed circuit board includes: the first routing layer, the first reference layer and destination layer, and the first reference layer is located at the first routing layer and mesh
It marks between layer, which is the routing layer different from the first routing layer (alternatively, the destination layer is different with the first reference layer
Reference layer)；At this point, the first reference layer and destination layer form DGS filter, which is used for mesh in the first routing layer
The signal transmitted on mark cabling is filtered；Wherein, it is provided with DGS plot shape in the first reference layer, the DGS plot shape is with target cabling
Upright projection in the first reference layer is that symmetry axis is symmetrical；In the periphery of DGS plot shape, through the first reference layer and mesh
Mark layer is provided with N (N > 1) a ground via hole, and the first reference layer is connected by the reference locality domain in this N number of ground via hole and destination layer
It is logical.
As can be seen that for multilayer printed circuit board, in the DGS filter that the embodiment of the present invention provides, Ke Yi
N number of ground via hole is arranged in the periphery of DGS plot shape, in turn, by this N number of ground via hole by the reference between the first reference layer and destination layer
Ground regional connectivity, so that the reference potential between the first reference layer and destination layer is identical, to reduce different reference layers or cabling
Resonance between layer, to guarantee DGS filter discrimination in multilayer printed circuit board.
In a kind of possible design method, the distance between adjacent ground via hole of any two is not more than DGS filter
Maximum functional wavelength 1/4.When the distance between two adjacent ground via hole is sufficiently small, this N number of ground via hole is equivalent to
Hole grid are formd in multilayer printed circuit board, due to this N number of ground, the periphery of DGS plot shape is arranged in via hole, printed circuit board
Interior DGS plot shape 22 is equivalent to is wrapped up by the hole grid that this N number of ground via hole is formed, the electromagnetic wave that can be generated to DGS filter
It is shielded, thus the electromagnetic radiation for effectively DGS filter being inhibited to generate.
In a kind of possible design method, on the first reference layer, which surrounds the periphery of the DGS plot shape
Form closed figure.In this way, DGS plot shape can be wrapped up by N number of ground via hole of reference locality domain adjacent thereto and surrounding
It is more complete, the electromagnetic radiation of DGS filter generation can be further suppressed.
In a kind of possible design method, which is through-hole, blind hole or buried via hole.
It in a kind of possible design method, is provided between the first reference layer and destination layer and hollows out layer, this hollows out layer and exists
Upright projection on destination layer is Chong Die with the reference locality domain in destination layer.When the depth for hollowing out layer is bigger, to common-mode noise
Inhibiting effect be more obvious, also, the bandwidth of operation of DGS filter is consequently increased.At this point, the reference locality domain, hollowing out layer
And inclusion enclave is collectively formed in N number of ground via hole of DGS plot shape surrounding, the electromagnetic radiation for inhibiting DGS filter to generate.
In a kind of possible design method, which includes the first U-shaped structure and the second U-shaped structure, the first U
Type structure and second U-shaped structure are respectively symmetrical axial symmetry point in the upright projection of first reference layer with the target cabling
Cloth；Wherein, the opening of first U-shaped structure and the opening of second U-shaped structure are oppositely arranged.
In a kind of possible design method, which includes: with the target cabling in the vertical of first reference layer
Be projected as symmetry axis symmetrical the first c-type structure and the second c-type structure, wherein the opening of the first c-type structure and this
The opening of two c-type structures is oppositely arranged, which is connected with the second c-type structure by connecting line, the connecting line with
Target cabling is vertical in the upright projection of the first reference layer.
In a kind of possible design method, which includes the first G type structure and the 2nd G type structure, the first G
Type structure and the 2nd G type structure are respectively symmetrical axial symmetry point in the upright projection of first reference layer with the target cabling
Cloth；Wherein, the opening of the opening and the 2nd G type structure of the first G type structure is oppositely arranged.
As can be seen that the embodiment of the invention also provides three kinds of DGS plot shapes of different shapes, i.e., symmetrical co-deflection G type DGS
Structure, symmetrical C-shaped dumbbell shape DGS structure and symmetrical double-U-shaped DGS structure.
In a kind of possible design method, which is differential lines or single cabling.
Second aspect, the embodiment of the present invention provide a kind of printed circuit board, which includes such as above-mentioned first
The DGS filter of any one of aspect.
The third aspect, the embodiment of the present invention provide a kind of filter, which includes such as above-mentioned second aspect
In printed circuit board.
Wherein, technical effect brought by any design method can be found in first aspect in second aspect or the third aspect
Technical effect brought by middle different designs mode, details are not described herein again.
The aspects of the invention or other aspects can more straightforwards in the following description.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram one of printed circuit board provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram one for the printed circuit board for being provided with DGS filter provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram one of DGS plot shape provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram two for the printed circuit board for being provided with DGS filter provided in an embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram two of DGS plot shape provided in an embodiment of the present invention；
Fig. 6 is a kind of structural schematic diagram three for the printed circuit board for being provided with DGS filter provided in an embodiment of the present invention；
Fig. 7 is a kind of structural schematic diagram three of DGS plot shape provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram four of DGS plot shape provided in an embodiment of the present invention；
Fig. 9 is a kind of structural schematic diagram five of DGS plot shape provided in an embodiment of the present invention；
Figure 10 is a kind of structural schematic diagram for the printed circuit board for being provided with DGS filter provided in an embodiment of the present invention
Four；
Figure 11 is the simulation result schematic diagram provided in an embodiment of the present invention to the printed circuit board for being provided with DGS filter
One；
Figure 12 is a kind of structural schematic diagram for the printed circuit board for being provided with DGS filter provided in an embodiment of the present invention
Five；
Figure 13 is the simulation result schematic diagram provided in an embodiment of the present invention to the printed circuit board for being provided with DGS filter
Two；
Figure 14 is a kind of structural schematic diagram for the printed circuit board for being provided with DGS filter provided in an embodiment of the present invention
Six；
Figure 15 is the simulation result schematic diagram provided in an embodiment of the present invention to the printed circuit board for being provided with DGS filter
Three；
Figure 16 is the simulation result schematic diagram provided in an embodiment of the present invention to the printed circuit board for being provided with DGS filter
Four；
Figure 17 is the simulation result schematic diagram provided in an embodiment of the present invention to the printed circuit board for being provided with DGS filter
Five.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention is retouched in detail
It states.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two
It is a or more than two.
The DGS filter that the embodiment of the present invention provides can be applied in multilayer printed circuit board, the multilayer printed circuit
Plate includes at least two reference layers and at least two routing layers, and each routing layer corresponds to a reference layer (alternatively, multiple cablings
Layer can correspond to the same reference layer), it is provided for the routing layer with reference to earth signal by the reference layer.
Illustratively, when each routing layer uniquely corresponds to a reference layer, as shown in Figure 1, multilayer printed circuit board
Routing layer 11 and reference layer 12 in 100 are successively arranged alternately.That is, including more in multilayer printed circuit board 100
A routing layer 11, each routing layer 11 are correspondingly arranged on a reference layer 12.Also, routing layer 11 and the reference of arbitrary neighborhood
It can be filled by the dielectric layer 13 of insulation between layer 12.For convenience of illustrating DGS filter provided in an embodiment of the present invention, after
It is illustrated by taking the routing layer 11 and reference layer 12 that are successively arranged alternately shown in Fig. 1 as an example in continuous embodiment.
Wherein, routing layer 11 is typically provided with the cabling for carrying electric signal, can specifically be walked by one or more metal
Line is constituted, and reference layer 12 is generally used for carrying power supply or refers to earth signal, the telecommunications of each metal routing carrying in routing layer 11
Number finally lead to each input/output (I/O, in/out) interface of printed circuit board 100.
As shown in Fig. 2, DGS filter 100 provided in an embodiment of the present invention is used for target cabling in the first routing layer 11a
The signal of upper transmission is filtered.Wherein, which can be differential lines 21, or single cabling, the embodiment of the present invention
This is not intended to be limited in any.
It illustrates by differential lines 21 of above-mentioned target cabling, as shown in Fig. 2, DGS filter 100 includes: the be oppositely arranged
One reference layer 12a and destination layer 11b, destination layer 11b can be any reference in printed circuit board in addition to the first reference layer 12a
Layer, or any routing layer in printed circuit board in addition to the first routing layer 11a is (with routing layer 11b for above-mentioned mesh in Fig. 2
Mark layer).
Specifically, DGS plot shape 22 is provided in the first reference layer 12a, as shown in figure 3, the DGS plot shape 22 is with differential lines 21
Upright projection in the first reference layer 12a is that symmetry axis is symmetrical.The shape of the DGS plot shape 22 is specifically as follows existing skill
Double C-type defect ground structure or U-shaped dumbbell shape defect ground structure in art, or other defect ground structures, the present invention are subsequent
It will be apparent from embodiment.
Wherein, in conjunction with shown in Fig. 2 and Fig. 3, in the periphery of DGS plot shape 22, along the direction perpendicular to the first reference layer 12a,
First reference layer 12a and destination layer 11b are provided with N (N > 1) a ground via hole 23, as shown in Fig. 2, the first reference layer 12a
It is connected to by the reference locality domain 24 being arranged in ground via hole 23 and destination layer 11b.Although each area in each reference layer 12
Domain can be provided with reference to earth signal, still, in embodiments of the present invention, DGS plot shape 22 in any reference layer can be projected
As reference locality domain, and in any routing layer, the region where DGS plot shape can also being projected is set as in the region at place
Reference locality domain.
It should be noted that in DGS filter 100 shown in Fig. 2, ground via hole 23 by the first reference layer 12a and with
Reference locality domain 24 in one layer of first reference layer 12a adjacent routing layer 11b (i.e. destination layer) is connected to.
It is understood that as shown in figure 4, ground via hole 23 can also in multilayer routing layer 11 and multilayer reference layer 12
The connection of reference locality domain.For example, ground via hole 23 has run through all routing layers 11 of printed circuit board (i.e. in (a) in Fig. 4
Routing layer 11a, routing layer 11b and routing layer 11c) 11 and all reference layers 12 (i.e. reference layer 12a, reference layer 12b and reference
Layer 12c)；In (b) in Fig. 4, ground via hole 23 has run through the first reference layer 12a, the destination layer 11b where DGS plot shape 22, with
And the first reference layer 12b between reference layer 12a and destination layer 11b.
That is, above-mentioned ground via hole 23 can be through-hole, blind hole or buried via hole, the embodiment of the present invention to this with no restriction.
By taking (b) in Fig. 4 as an example, when local via hole 23 is buried via hole, since ground via hole 23 has only run through the first reference layer
12a, destination layer 11b and reference layer 12b, then, it can also be normally routed in the routing layer 11c of not set ground via hole 23, from
And reduce the influence to the wiring in multilayer printed circuit board.
As can be seen that for multilayer printed circuit board, in the DGS filter that the embodiment of the present invention provides, Ke Yi
N number of ground via hole is arranged in the periphery of DGS plot shape, in turn, by this N number of ground via hole by the reference between different reference layers or routing layer
Ground regional connectivity, so that the reference potential in the reference locality domain between different reference layers or routing layer is identical, to reduce difference
Resonance between reference layer or routing layer, to guarantee DGS filter discrimination on multilayer printed circuit board.
Optionally, the distance between adjacent ground via hole 23 of any two is not more than the maximum functional wave of DGS filter 100
Long 1/4.For example, the working frequency range of DGS plot shape 22 is 25GHz-30GHz, that is to say, that the maximum operation frequency of DGS plot shape 22
For 30GHz, when DGS plot shape 22 works on 30GHz, the wavelength of the electromagnetic wave of radiation is λ (λ > 0), then, any two
The distance between a adjacent ground via hole 23 p should be less than or be equal to λ/4.
When the distance between two adjacent ground via hole is not more than the 1/4 of the maximum functional wavelength of DGS filter, this N
A ground via hole is equivalent to forms hole grid in multilayer printed circuit board, and due to this N number of ground, the outer of DGS plot shape is arranged in via hole
It encloses, therefore, the DGS plot shape in printed circuit board is equivalent to is wrapped up by the hole grid that this N number of ground via hole is formed, and can filter to DGS
The electromagnetic wave that wave device generates is shielded, thus the electromagnetic radiation for effectively DGS filter being inhibited to generate.
Optionally, as shown in Fig. 2, in the first reference layer 12a, above-mentioned N number of ground via hole 23 can be set around DGS plot shape
The figure that 22 periphery is formed is closed figure, that is, forms N number of ground via hole 23 as shown in Figure 5, in this way, DGS plot shape 22 can be with
By the more complete of N number of ground via hole 23 of reference locality domain 24 adjacent thereto and surrounding package, DGS can be further suppressed
The electromagnetic radiation that filter generates.
Further, it can also be arranged between above-mentioned first reference layer and destination layer and hollow out layer, hollowing out at this time can in layer 31
Filled with dielectric, illustratively, as shown in (a) in Fig. 6, the first reference layer is 12a, can be carried out to routing layer 11b
Processing is hollowed out, formation hollows out a layer 31a, the size of upright projection of the layer 31 on the first reference layer 12a hollowed out, with the first reference layer
The size for the figure that the Shangdi 12a via hole 23 is formed is identical, at this point, destination layer is reference layer 12b；Or such as (b) in Fig. 6
Shown, the first reference layer is 12a, can carry out hollowing out processing to routing layer 11b and reference layer 12b, and formation hollows out a layer 31b, this
When, destination layer is routing layer 11c, this hollows out layer 31 in the upright projection on destination layer 11c and the reference locality in destination layer 11c
Domain 24 is overlapped；Or as shown in (c) in Fig. 6, the first reference layer is 12a, can to routing layer 11b, reference layer 12b and
Routing layer 11c carries out hollowing out processing, and formation hollows out a layer 31c, at this point, destination layer is reference layer 12c.When the depth for hollowing out layer is bigger
When, the inhibiting effect of common-mode noise is more obvious, also, the bandwidth of operation of DGS filter is consequently increased.
As can be seen that no matter hollow out how many a reference layers or routing layer, reference locality domain in destination layer, hollow out layer and
Inclusion enclave is collectively formed in N number of ground via hole of DGS plot shape surrounding, the electromagnetic radiation for inhibiting DGS filter to generate.
Optionally, above-mentioned first routing layer be specifically as follows in above-mentioned DGS filter positioned at surface layer routing layer (such as Fig. 2,
First routing layer 11a of Fig. 4 or shown in fig. 6), or it is located at the routing layer of bottom in above-mentioned multilayer printed circuit board, also
Can be any routing layer for being located at middle layer in above-mentioned multilayer printed circuit board, the embodiment of the present invention to this with no restriction.
It should be noted that DGS filter 100 shown in Fig. 2, Fig. 4 and Fig. 6 can be used as in printed circuit board
The reference layer 12 of a part, DGS filter 100 shown in Fig. 2, Fig. 4 and Fig. 6 is not necessarily used as the ginseng of printed circuit board
Layer is examined, similar, the routing layer 11 of DGS filter shown in Fig. 2, Fig. 4 and Fig. 6 is not necessarily used as printed circuit board
Routing layer.By taking Fig. 2 as an example, reference layer 12b can be used as a reference layer in above-mentioned DGS filter 100, still, for DGS
For entire printed circuit board where filter 100, in this layer of reference layer 12b in addition to this partial region reference layer 12b,
Cabling can also be set, i.e. this layer of reference layer 12b routing layer can also be used as entire printed circuit board.
Further, based on the DGS filter provided in Fig. 1-Fig. 6, the embodiment of the invention also provides a variety of not similar shapes
The DGS plot shape 22 of shape, for example, symmetrical co-deflection G type DGS structure shown in Fig. 7, symmetrical C-shaped dumbbell shape DGS knot shown in Fig. 8
Structure and symmetrical double-U-shaped DGS structure shown in Fig. 9, carry out in detail above-mentioned DGS plot shape 22 of different shapes below with reference to attached drawing
Thin elaboration, it is to be understood that the DGS plot shape 22 being arranged in DGS filter provided in an embodiment of the present invention can also be it
His arbitrary shape, the embodiment of the present invention to this with no restriction.
In a kind of possible design method, the shape of above-mentioned DGS plot shape 22 is as shown in fig. 7, DGS plot shape 22 includes first
G type structure 61 and the 2nd G type structure 62, the first G type structure 61 and the 2nd G type structure 62 are respectively with differential lines 21 in the first reference
The upright projection of layer is that symmetry axis is symmetrical.Wherein, the opening phase of the opening and the 2nd G type structure 62 of the first G type structure 61
To setting.
Illustratively, as shown in fig. 7, the line width w of differential lines 21m=0.167mm, the distance s between differential lines 21m=
0.254mm, the thickness (being not shown in Fig. 7) of differential lines 21 are 0.0347mm.
Still as shown in fig. 7, the specific size of DGS plot shape 22 is as follows: perpendicular on 21 direction of differential lines, the first G type structure
The first side length s of 61 (or the 2nd G type structures 62)1=2.1mm is parallel on 21 direction of differential lines, the first G type structure 61 (or
2nd G type structure 62) the second side length s2=0.9412mm, the line width s of the first G type structure 61 (or the 2nd G type structure 62)3=
0.18mm (line width of settable 22 any position of DGS plot shape is equal), the first G type structure 61 (or the 2nd G type structure 62) are opened
The distance s of mouth position4=0.842mm, the distance s of aperture position to the second side length5=0.269mm；From aperture position to the first side
The long distance s extended6=0.18mm, the distance s between the first G type structure 61 and the 2nd G type structure 627=0.4572mm, DGS
The thickness of reference layer (being not shown in Fig. 6) where figure 22 is about 0.0347mm；In addition, being adjacent to the interval between via hole 23
P is about 0.4mm, and arbitrarily the spacing j between the side length nearest apart from DGS plot shape 22 of via hole 23 is about 0.127mm.
Further, DGS plot shape 22 shown in Fig. 7 can be applied in multilayer printed circuit board 200 shown in Fig. 10.Its
In, multilayer printed circuit board 200 includes 3 layers of routing layer (routing layer A, B and C) and 3 layers of reference layer (reference layer D, E and F), above-mentioned
The setting of differential lines 21 is arranged in routing layer A, above-mentioned DGS plot shape 22 in reference layer D, and ground via hole 23 is sequentially communicated reference layer D, cabling
Layer B, reference layer E, routing layer C and reference layer F.At this point, routing layer B is as destination layer in above-mentioned DGS filter 100, reference
For layer D as the first routing layer in above-mentioned DGS filter 100, ground via hole 23 has run through the reference locality domain 24 in routing layer B and ginseng
Examine a layer D.
After being emulated to the common mode Insertion Loss that multilayer printed circuit board 200 shown in Fig. 10 generates, obtained simulation result
As shown in figure 11, it can be seen that provided in an embodiment of the present invention compared to the printed circuit board of not set above-mentioned DGS plot shape 22
Printed circuit board 200 can inhibit common mode Insertion Loss in -10dB in the 6GHz bandwidth of 25GHz-31GHz or so hereinafter, to drop
The common-mode noise generated when differential signal transmission in low differential lines 21, to guarantee the filter of DGS plot shape 22 on multilayer printed circuit board
Wave energy power.
In alternatively possible design method, the shape of above-mentioned DGS plot shape 22 as shown in figure 8, DGS plot shape 22 include with
Differential lines 21 the first reference layer upright projection be the symmetrically arranged first c-type structure 71 of symmetry axis and the second c-type structure 72,
Wherein, the opening of the opening and the second c-type structure 72 of the first c-type structure 71 is oppositely arranged, and the first c-type structure 71 and the 2nd C
Type structure 72 is connected by connecting line 73, and connecting line 73 is vertical in the upright projection of the first reference layer with differential lines 21, for example, such as
Shown in Fig. 8, connecting line 73 is perpendicular bisector of the differential lines 21 in the upright projection of the first reference layer.
It is similar with DGS plot shape 22 shown in Fig. 7, in DGS plot shape 22 shown in Fig. 8, the line width w of differential lines 21m=
0.167mm, the distance s between differential lines 21m=0.254mm, the thickness (being not shown in Fig. 8) of differential lines 21 are 0.0347mm.
Still as shown in figure 8, the specific size of DGS plot shape 22 is as follows: being parallel on 21 direction of differential lines, the first c-type structure
The first side length z of 71 (or second c-type structures 72)1=1.8mm, perpendicular on 21 direction of differential lines, the first c-type structure 71 (or
Second c-type structure 72) the second side length z2=0.54mm, the third side length extended perpendicular to the second side length to 73 direction of connecting line
z3=0.43mm, the distance between third side length and connecting line 73 z4=0.18mm, the distance between third side length and the first side length
z5=0.18mm, the line width z of the first c-type structure 71 (or second c-type structure 72)6=0.18mm, the opening of the first c-type structure 71
Position is to the spacing z between the aperture position of the second c-type structure 727=0.8596mm.
In addition, being parallel on 21 direction of differential lines, the interval p being adjacent between via hole 23xAbout 0.3762mm, perpendicular to
On 21 direction of differential lines, the interval p that is adjacent between via hole 23yAbout 0.3995mm, arbitrarily via hole 23 is apart from DGS plot shape 22
Spacing j between nearest side length is about 0.2286mm.
Further, DGS plot shape 22 shown in Fig. 8 can be applied in the multilayer printed circuit board 300 shown in Figure 12.Its
In, multilayer printed circuit board 300 includes 3 layers of routing layer (routing layer A, B and C) and 3 layers of reference layer (reference layer D, E and F), above-mentioned
The setting of differential lines 21 is arranged in routing layer A, above-mentioned DGS plot shape 22 in reference layer D, and ground via hole 23 is sequentially communicated reference layer D, cabling
Layer B, reference layer E, routing layer C and reference layer F.At this point, routing layer B is as destination layer in above-mentioned DGS filter 100, reference
For layer D as the first routing layer in above-mentioned DGS filter 100, ground via hole 23 has run through the reference locality domain 24 in routing layer B and ginseng
Examine a layer D.
After being emulated to the common mode Insertion Loss that multilayer printed circuit board 300 shown in Figure 12 generates, obtained simulation result
As shown in figure 13, it can be seen that provided in an embodiment of the present invention compared to the printed circuit board of not set above-mentioned DGS plot shape 22
Printed circuit board 300 can in the 4.5GHz bandwidth of 24GHz-28.5GHz or so, by common mode Insertion Loss inhibit in -10dB hereinafter, from
And the common-mode noise generated when reducing differential signal transmission in differential lines 21, to guarantee DGS plot shape 22 on multilayer printed circuit board
Filter capacity.
In alternatively possible design method, the shape of above-mentioned DGS plot shape 22 is as shown in figure 9, DGS plot shape 22 includes the
One U-shaped structure 81 and the second U-shaped structure 82, the first U-shaped structure 81 and the second U-shaped structure 82 are respectively with differential lines 21 in the first ginseng
The upright projection for examining layer is that symmetry axis is symmetrical.Wherein, the opening and the opening of the second U-shaped structure 82 of the first U-shaped structure 81
It is oppositely arranged.
In DGS plot shape 22 shown in Fig. 9, the line width w of differential lines 21m=0.244m, the distance s between differential lines 21m=
0.264mm, the thickness (being not shown in Fig. 9) of differential lines 21 are 0.0512mm.
Still as shown in figure 9, the specific size of DGS plot shape 22 is as follows: being parallel on 21 direction of differential lines, the first U-shaped structure
The first side length u of 81 (or second U-shaped structures 82)1=0.397mm, line width u2=0.476mm；Perpendicular on 21 direction of differential lines,
Second side length u of the first U-shaped structure 81 (or second U-shaped structure 82)3=2.183mm, line width u4=0.18mm；First U-shaped structure
Spacing u between the aperture position of 81 aperture position to the second U-shaped structure 825=0.192mm.
In addition, the interval p being adjacent between via hole 23 is about 0.4mm, periphery setting of the ground via hole 23 along DGS plot shape 22.
Further, DGS plot shape 22 shown in Fig. 9 can be applied in the multilayer printed circuit board 400 shown in Figure 14.Its
In, multilayer printed circuit board 400 includes 3 layers of routing layer (routing layer A, B and C) and 3 layers of reference layer (reference layer D, E and F), above-mentioned
The setting of differential lines 21 is arranged in routing layer A, above-mentioned DGS plot shape 22 in reference layer D, and ground via hole 23 is sequentially communicated reference layer D, cabling
Layer B, reference layer E, routing layer C and reference layer F.At this point, reference layer E is as destination layer in above-mentioned DGS filter 100, reference
As the first routing layer in above-mentioned DGS filter 100, the routing layer B between reference layer D and reference layer E is hollowed out layer D, is formed
Layer 31 is hollowed out, ground via hole 23 has run through reference layer E, hollowed out layer 31 and reference layer D.
After being emulated to the common mode Insertion Loss that multilayer printed circuit board 400 shown in Figure 14 generates, obtained simulation result
As shown in figure 15, it can be seen that provided in an embodiment of the present invention compared to the printed circuit board of not set above-mentioned DGS plot shape 22
Printed circuit board 400 can inhibit common mode Insertion Loss in -10dB in the 2GHz bandwidth of 20GHz-22GHz or so hereinafter, to drop
The common-mode noise generated when differential signal transmission in low differential lines 21, to guarantee the filter of DGS plot shape 22 on multilayer printed circuit board
Wave energy power.
Further, it after the electromagnetic radiation generated to multilayer printed circuit board 400 shown in Figure 14 emulates, obtains
Simulation result is as shown in figure 16.As can be seen that the printed circuit board of traditional DGS filter is provided in compared with the prior art,
Electromagnetic radiation can be reduced 6dB- in the bandwidth of 10GHz-30GHz or so by printed circuit board 400 provided in an embodiment of the present invention
10dB.Wherein, the simulation result schematic diagram varying with frequency of electromagnetic radiation shown in Figure 16 is apart from printed circuit board ten
Position at rice is respectively to printed circuit board 400 provided in an embodiment of the present invention, and is provided with traditional DGS filter in the prior art
What the printed circuit board of wave device was emulated.
In addition, to DGS filter provided in an embodiment of the present invention is provided with (for example, Fig. 7, Fig. 8 or DGS shown in Fig. 9 are filtered
Wave device) the differential mode Insertion Loss that generates of multilayer printed circuit emulated after, as shown in figure 17, it can be seen that real using the present invention
The differential mode Insertion Loss that the DGS filter of example offer generates is applied, with filtering when not set above-mentioned DGS filter in 10GHz-35GHz
The differential mode Insertion Loss generated in bandwidth is essentially identical, within 0dB to -2dB.
That is, DGS filter provided in an embodiment of the present invention can guarantee the differential mode Insertion Loss generated in filtering bandwidth
While increase, the common mode Insertion Loss of generation is inhibited in -10dB hereinafter, and reduce the electromagnetic radiation of DGS filter generation,
To improve the filtering performance of DGS filter.
Further, the embodiment of the present invention also provides a kind of printed circuit board, may include above-mentioned in the printed circuit board
One DGS filter, the printed circuit board can be applied in all kinds of entity devices, the embodiment of the present invention to this with no restriction.
Further, the embodiment of the present invention also provides a kind of filter, for example, communication equipment etc., in the filter
May include above-mentioned printed circuit board, the embodiment of the present invention to this with no restriction.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all any modification, equivalent substitution, improvement and etc. on the basis of technical solution of the present invention, done should all
Including within protection scope of the present invention.
Claims (11)
1. a kind of defect ground structure DGS filter, which is characterized in that the DGS filter is applied to printed circuit board, the print
Circuit board processed includes: the first routing layer, the first reference layer and destination layer, and first reference layer is located at first routing layer
Between the destination layer, the destination layer are as follows: the routing layer different from first routing layer, alternatively, with first ginseng
Examine the different reference layer of layer；
First reference layer and the destination layer form the DGS filter, and the DGS filter to described first for walking
The signal transmitted on target cabling in line layer is filtered；
Wherein, DGS plot shape is provided in first reference layer, the DGS plot shape is with the target cabling in first ginseng
Examining the upright projection in layer is that symmetry axis is symmetrical；In the periphery of the DGS plot shape, through first reference layer and institute
It states destination layer and is provided with N number of ground via hole, first reference layer passes through the reference ground in N number of ground via hole and the destination layer
Regional connectivity, N > 1.
2. DGS filter according to claim 1, which is characterized in that adjacent the distance between the ground via hole of any two
No more than the 1/4 of the maximum functional wavelength of the DGS filter.
3. DGS filter according to claim 1, which is characterized in that on first reference layer, N number of ground mistake
Hole forms closed figure around the periphery of the DGS plot shape.
4. DGS filter according to claim 1, which is characterized in that described ground via hole is through-hole, blind hole or buried via hole.
5. DGS filter according to claim 1, which is characterized in that between first reference layer and the destination layer
It is provided with and hollows out layer, the layer that hollows out is in the upright projection on the destination layer and the reference locality domain weight in the destination layer
It is folded.
6. DGS filter according to any one of claims 1-5, which is characterized in that the DGS plot shape includes the first U
Type structure and the second U-shaped structure, upright projection of first U-shaped structure with the target cabling in first reference layer are
Symmetry axis is symmetrical, and second U-shaped structure is pair in the upright projection of first reference layer with the target cabling
Claim axial symmetry distribution；
Wherein, the opening of first U-shaped structure and the opening of second U-shaped structure are oppositely arranged.
7. DGS filter according to any one of claims 1-5, which is characterized in that the DGS plot shape includes: with institute
It is symmetrical the first c-type structure and the second c-type knot of symmetry axis that target cabling, which is stated, in the upright projection of first reference layer
Structure,
Wherein, the opening of the opening and the second c-type structure of the first c-type structure is oppositely arranged, the first c-type structure
It is connected with the second c-type structure by connecting line, the connecting line and the target cabling hanging down in first reference layer
It is vertical to deliver directly shadow.
8. DGS filter according to any one of claims 1-5, which is characterized in that the DGS plot shape includes the first G
Type structure and the 2nd G type structure, upright projection of the first G type structure with the target cabling in first reference layer are
Symmetry axis is symmetrical, and the 2nd G type structure is pair in the upright projection of first reference layer with the target cabling
Claim axial symmetry distribution；
Wherein, the opening of the opening and the 2nd G type structure of the first G type structure is oppositely arranged.
9. DGS filter according to any one of claims 1-5, which is characterized in that the target cabling is differential lines
Or single cabling.
10. a kind of printed circuit board, which is characterized in that the printed circuit board includes as described in any one of claim 1-9
DGS filter.
11. a kind of filter, which is characterized in that the filter includes printed circuit board as claimed in claim 10.
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| CN201611207733.8A CN108242582B (en) | 2016-12-23 | 2016-12-23 | A kind of DGS filter, printed circuit board and filter |
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| CN111342178B (en) * | 2020-03-17 | 2021-11-30 | 电子科技大学 | Dielectric integrated defected ground structure device, filter and communication system |
| JP2021164142A (en) * | 2020-04-03 | 2021-10-11 | 株式会社村田製作所 | High frequency module, high frequency circuit and communication device |
| JP2021164141A (en) * | 2020-04-03 | 2021-10-11 | 株式会社村田製作所 | High frequency module and communication device |
| CN114650647A (en) * | 2020-12-18 | 2022-06-21 | 青岛海信宽带多媒体技术有限公司 | Optical module |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM312785U (en) * | 2006-11-20 | 2007-05-21 | Weng Min Hang | Planar filter with the defected ground structure |
| KR101375581B1 (en) * | 2013-04-26 | 2014-03-18 | 한밭대학교 산학협력단 | Circuit element and method for tunable defected ground structure |
| CN105006618A (en) * | 2015-08-07 | 2015-10-28 | 南京理工大学 | LTCC-and-DGS-based miniature multi-path filter set |
| CN204793131U (en) * | 2015-07-01 | 2015-11-18 | 安徽大学 | Novel broadband band elimination filter based on DGS |
-
2016
- 2016-12-23 CN CN201611207733.8A patent/CN108242582B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM312785U (en) * | 2006-11-20 | 2007-05-21 | Weng Min Hang | Planar filter with the defected ground structure |
| KR101375581B1 (en) * | 2013-04-26 | 2014-03-18 | 한밭대학교 산학협력단 | Circuit element and method for tunable defected ground structure |
| CN204793131U (en) * | 2015-07-01 | 2015-11-18 | 安徽大学 | Novel broadband band elimination filter based on DGS |
| CN105006618A (en) * | 2015-08-07 | 2015-10-28 | 南京理工大学 | LTCC-and-DGS-based miniature multi-path filter set |
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