CN109301410A - A kind of SIW zigzag cross-coupling band pass filter - Google Patents
A kind of SIW zigzag cross-coupling band pass filter Download PDFInfo
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- CN109301410A CN109301410A CN201811119782.5A CN201811119782A CN109301410A CN 109301410 A CN109301410 A CN 109301410A CN 201811119782 A CN201811119782 A CN 201811119782A CN 109301410 A CN109301410 A CN 109301410A
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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
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
- H01P1/20327—Electromagnetic interstage coupling
- H01P1/20336—Comb or interdigital filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/003—Coplanar lines
- H01P3/006—Conductor backed coplanar waveguides
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Abstract
The invention discloses a kind of SIW zigzag cross-coupling band pass filters, including upper surface metal layer, medium substrate, lower surface ground metal layer, medium substrate is between upper surface metal layer and lower surface ground metal layer, upper surface metal layer includes zigzag cross-coupling metal structure, the first coplanar wave guide feedback structure and the second coplanar wave guide feedback structure, lower surface ground metal layer is ground plane, broached-tooth design in the metal layer of upper surface is connect by cylindrical metal through-hole with lower surface ground metal layer, and forms resonant cavity；Signal in SIW of the present invention transmits in the region that medium substrate and top and bottom metal layer are constituted, this region constitutes waveguiding structure, have many advantages, such as low-loss, low interference, and SIW technology itself has the advantages that small size, it transmits fast, wherein the filter realizes horizontal direction electromagnetic coupling, and zigzag cross coupling structure has controllable transmission zero, has the characteristics that good bandwidth selectivity and Out-of-band rejection.
Description
Technical field
The present invention relates to frequency microwave bandpass filter technical field more particularly to a kind of SIW zigzag cross coupling strips
Bandpass filter.
Background technique
Frequency microwave bandpass filter is one of module important in modern wireless communication systems, with RF IC
Fast development and frequency spectrum resource be becoming tight day, system proposes higher requirement to the performance and size of filter.It is existing
Some frequency spectrum resources is nervous, and filter not Out-of-band rejection when in use, can also effectively cause insertion loss, therefore will affect phase
The signal interference of side channel.Existing frequency microwave band pass filter system is bulky and more complicated, and integrated level compares
Low, Given this present invention provides a kind of SIW zigzag cross-coupling band pass filter.
Summary of the invention
The purpose of the present invention is to solve in the prior art and filter not Out-of-band rejection when in use, can also seriously make
At insertion loss, therefore it will affect the signal interference of adjacent channel.Existing frequency microwave band pass filter system is bulky,
And it is more complicated, integrated level is relatively low, the disadvantages of, and a kind of SIW zigzag cross-coupling band pass filter proposed.
To achieve the goals above, present invention employs following technical solutions:
A kind of SIW zigzag cross-coupling band pass filter, including upper surface metal layer, medium substrate, lower surface grounded metal
Layer, for the medium substrate between upper surface metal layer and lower surface ground metal layer, the upper surface metal layer includes saw
Dentation cross-coupling metal structure, the first coplanar wave guide feedback structure and the second coplanar wave guide feedback structure, the lower surface connect
Ground metal layer is ground plane, the entire medium substrate of area covering, and the broached-tooth design in the upper surface metal layer passes through cylinder
Metal throuth hole is connect with lower surface ground metal layer, and forms resonant cavity；
The zigzag cross coupling structure includes the first serrated metal and the second serrated metal；The first zigzag gold
Category be connected with the lower surface ground metal layer by multiple cylindrical metal through-holes, second serrated metal with it is described under
Surface earthing metal layer is connected also by multiple cylindrical metal through-holes；
The first coplanar wave guide feedback structure is symmetrical structure, and central part is the first microstrip line, first microstrip line one
Side is connected close to medium substrate edge, the other side with the first serrated metal；In the first coplanar wave guide feedback structure
One counterpoise grounding is rectangular microstrip line composition, and is connected by six cylindrical metal through-holes with the lower surface ground metal layer；
The second coplanar wave guide feedback structure is symmetrical structure, and central part is the second microstrip line, second microstrip line one
Side is connected close to medium substrate edge, the second serrated metal of the other side；Second in the second coplanar wave guide feedback structure
Counterpoise grounding is rectangular microstrip line composition, and is connected by six cylindrical metal through-holes with the lower surface ground metal layer.
Preferably, first serrated metal is formed by one section of rectangular microstrip line along y-axis just in the first counterpoise grounding
Extend eight the first dentation metals side by side in direction；The first dentation metal of four, left side is continuously distributed, the first tooth of four, right side
Shape metal is continuously distributed, and about y-axis or so central symmetry.
Preferably, the first dentation metal formed in first serrated metal is trapezoidal, the first dentation gold
The number of category is eight, and six of them the first dentation metal is isosceles trapezoid, and another two the first dentation metal is right-angled trapezium；Its
First dentation metal of middle right-angled trapezium shape is arranged at left and right sides of x-axis；Wherein trapezoidal longer bottom edge connects with described first
Rectangular microstrip line in area is connected, and the rectangular microstrip line in first counterpoise grounding passes through with the lower surface ground metal layer
Ten cylindrical metal through-hole connections, wherein cylindrical metal through-hole is continuously distributed along the x-axis direction.
Preferably, second serrated metal is formed by one section of rectangular microstrip line negative along y-axis in the second counterpoise grounding
Also extend eight the second dentation metals side by side in direction；The second dentation metal of four, left side is continuously distributed, four second, right side
Dentation metal is continuously distributed, and about y-axis or so central symmetry；The second dentation metal in second serrated metal is
Trapezoidal, the number of the second dentation metal is eight, and six of them the second dentation metal is isosceles trapezoid, the second tooth of another two
Shape metal is right-angled trapezium, and wherein the second dentation metal of right-angled trapezium is located at center, and trapezoidal longer bottom edge with
Rectangular microstrip line in second counterpoise grounding is connected, and the rectangular microstrip line and the lower surface in second counterpoise grounding are grounded
Metal layer is connected by ten cylindrical metal through-holes；The cylindrical metal through-hole is continuously distributed along the x-axis direction.
The beneficial effects of the present invention are: what the signal in SIW of the present invention was constituted in medium substrate and top and bottom metal layer
It is transmitted in region, this region constitutes waveguiding structure, has many advantages, such as low-loss, low interference, and SIW technology itself has small size
The advantages of, transmission is fast, and wherein the filter realizes horizontal direction electromagnetic coupling, and zigzag cross coupling structure has
Controllable transmission zero has good bandwidth selectivity and Out-of-band rejection, and has size small, the low spy of insertion loss
Point.
Detailed description of the invention
Fig. 1 is the overall structure diagram of SIW of embodiment of the present invention sawtooth cross-coupled filter.
Fig. 2 is the upper surface metal layer schematic top plan view of SIW of embodiment of the present invention sawtooth cross-coupled filter.
Fig. 3 is the detail view schematic diagram of serrated metal structure.
Fig. 4 is the lower surface metal layer schematic top plan view of SIW of embodiment of the present invention sawtooth cross-coupled filter.
In figure: the first microstrip line of 1-, the second microstrip line of 2-, the first counterpoise grounding of 3-, the second counterpoise grounding of 4-, the first zigzag of 5-
Metal, the second serrated metal of 6-, 7- cylindrical metal through-hole, 8- medium substrate, the lower surface 9- ground metal layer.
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 carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to Fig.1-4, a kind of SIW zigzag cross-coupling band pass filter, including upper surface metal layer, medium substrate 8,
Lower surface ground metal layer 9, medium substrate 8 is between upper surface metal layer and lower surface ground metal layer 9, upper surface metal
Layer includes zigzag cross-coupling metal structure, the first coplanar wave guide feedback structure and the second coplanar wave guide feedback structure, following table
Face ground metal layer 9 is ground plane, the entire medium substrate 8 of area covering, and the broached-tooth design in the metal layer of upper surface passes through cylinder
Shape metal throuth hole 7 is connect with lower surface ground metal layer 9, and forms resonant cavity.
Zigzag cross coupling structure includes the first serrated metal 5 and the second serrated metal 6；First serrated metal
5 are connected with lower surface ground metal layer 9 by multiple cylindrical metal through-holes 7, the second serrated metal 6 and lower surface ground connection gold
Belong to layer 9 to be connected also by multiple cylindrical metal through-holes 7.
First coplanar wave guide feedback structure is symmetrical structure, and central part is the first microstrip line 1,1 side of the first microstrip line
Close to 8 edge of medium substrate, the other side is connected with the first serrated metal 5；First in first coplanar wave guide feedback structure connects
Area 3 is rectangular microstrip line composition, and is connected by six cylindrical metal through-holes 7 with lower surface ground metal layer 9.
Second coplanar wave guide feedback structure is symmetrical structure, and central part is the second microstrip line 2,2 side of the second microstrip line
Close to 8 edge of medium substrate, the second serrated metal of the other side 6 is connected；The second ground connection in second coplanar wave guide feedback structure
Band 4 is rectangular microstrip line composition, and is connected by six cylindrical metal through-holes 7 with lower surface ground metal layer 9.
First serrated metal 5 is formed by one section of rectangular microstrip line in the first counterpoise grounding 3 to be extended along positive direction of the y-axis
Eight the first dentation metals side by side；The first dentation metal of four, left side is continuously distributed, and the first dentation metal of four, right side is continuous
Distribution, and about y-axis or so central symmetry.
The the first dentation metal formed in first serrated metal 5 be it is trapezoidal, the number of the first dentation metal is eight,
Six of them the first dentation metal is isosceles trapezoid, and another two the first dentation metal is right-angled trapezium；Wherein right-angled trapezium shape
First dentation metal is arranged at left and right sides of x-axis；Wherein trapezoidal longer bottom edge with the rectangular microstrip line in the first counterpoise grounding 3
It is connected, the rectangular microstrip line in the first counterpoise grounding 3 is connect with lower surface ground metal layer 9 by ten cylindrical metal through-holes 7,
Wherein cylindrical metal through-hole 7 is continuously distributed along the x-axis direction.
Second serrated metal 6 is formed by one section of rectangular microstrip line in the second counterpoise grounding 4 also to be extended along negative direction of the y-axis
Eight the second dentation metals side by side out；The second dentation metal of four, left side is continuously distributed, and the second dentation metal of four, right side connects
Continuous distribution, and about y-axis or so central symmetry；The second dentation metal in second serrated metal 6 is trapezoidal, the second dentation
The number of metal is eight, and six of them the second dentation metal is isosceles trapezoid, and another two the second dentation metal is right-angled trapezium,
Wherein the second dentation metal of right-angled trapezium is located at center, and trapezoidal longer bottom edge with the square in the second counterpoise grounding 4
Shaped microstrip line is connected, and the rectangular microstrip line and lower surface ground metal layer 9 in the second counterpoise grounding 4 are by ten cylindrical metal through-holes
7 connections；Cylindrical metal through-hole 7 is continuously distributed along the x-axis direction.
The present invention uses relative dielectric constant for 10.2 substrate, and material is Rogers RT6010, with a thickness of 0.635mm,
The present invention is also suitable the microwave base plate of other materials.
The structure and key dimension of upper surface metal layer in the present embodiment are described in detail in conjunction with Fig. 2.Upper surface metal layer, which is located at, to be situated between
8 top of matter substrate, medium substrate 8 are rectangle, size are as follows: long L, width W.First counterpoise grounding 3 and the second counterpoise grounding 4 are rectangle
Shape, and it is located at the edge of medium substrate 8, size are as follows: long L3, width W3.The size of first microstrip line 1 and the second microstrip line 2
Are as follows: long L4, width W2.It is trapezoidal longer connected by one section of rectangular metal on one side, the size of rectangular metal are as follows: long L1, width W4,
Upper and lower two rectangular metals are at a distance of W1, and wherein the diameter of cylindrical metal through-hole 7 is L5, between adjacent column shape metal throuth hole 7
Spacing be L2.
Parameters in above-described embodiment are as follows: W=15mm, W1=7.4mm, W2=1.4mm, W3=5.8mm, W4=0.7mm；L
=20mm, L1=10mm, L2=1mm, L3=2.5mm, L4=5mm, L5=0.6mm.But the data in the present invention are without being limited thereto.
It is described in detail below with reference to Fig. 3, the first serrated metal 5 and the second serrated metal 6 are by isosceles trapezoid metal and directly
The trapezoidal metal in angle is constituted, and the high H of isosceles trapezoid metal, go to the bottom long D, the upper long d in bottom；The long d in bottom on right-angled trapezium metal, go to the bottom long D/2.
The bottom of right-angled trapezium and isosceles trapezoid is in same horizontal line.First serrated metal 5 is by six isosceles trapezoid metals and two
A trapezoidal composition of right angle metal, two of them right-angled trapezium metal divide column left and right sides；Second serrated metal 6 is by six isosceles ladders
Shape metal and two right-angled trapezium metal compositions, two of them right-angled trapezium metal are located at horizontal centre.First zigzag gold
The trapezoidal metal of category 5 and the second serrated metal 6 is uniformly distributed along x-axis two sides, and about y-axis direction central symmetry.First
Serrated metal 5 and the second serrated metal 6 are in cross-coupling shape, and the vertical interval between adjacent metal is S.
Parameters in above-described embodiment are as follows: D=1mm, d=0.1mm, H=5.1mm, S=0.1mm.It cannot be limited with this data
Determine protection scope of the present invention.
As shown in figure 4, lower surface ground metal layer 9 covers entire medium substrate 8, by six cylindrical metal through-holes 7,
Ten cylindrical metal through-holes 7 are connected respectively at four grounded band and the first serrated metal 5, the second serrated metal 6.Cylinder
7 diameter of shape metal throuth hole is 0.6mm, and 7 center spacing of adjacent column shape metal throuth hole is 1mm.
Signal in SIW of the present invention transmits in the region that medium substrate 8 and top and bottom metal layer are constituted, this region is constituted
Waveguiding structure has many advantages, such as low-loss, low interference, and SIW technology itself has the advantages that small size, and transmission is fast,
Wherein the filter realizes horizontal direction electromagnetic coupling, and zigzag cross coupling structure has controllable transmission zero, has
Good bandwidth selectivity and Out-of-band rejection, and have size small, the low feature of insertion loss.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (4)
1. a kind of SIW zigzag cross-coupling band pass filter, including upper surface metal layer, medium substrate (8), lower surface ground connection
Metal layer (9), it is characterised in that: the medium substrate (8) be located at upper surface metal layer and lower surface ground metal layer (9) it
Between, the upper surface metal layer includes that zigzag cross-coupling metal structure, the first coplanar wave guide feedback structure and second are coplanar
Waveguide feed structure, the lower surface ground metal layer (9) are ground plane, the entire medium substrate of area covering (8), the upper table
Broached-tooth design in the metal layer of face is connect by cylindrical metal through-hole (7) with lower surface ground metal layer (9), and forms resonance
Chamber；
The zigzag cross coupling structure includes the first serrated metal (5) and the second serrated metal (6)；First saw
Dentation metal (5) is connected with the lower surface ground metal layer (9) by multiple cylindrical metal through-holes (7), second saw
Dentation metal (6) is connected with the lower surface ground metal layer (9) also by multiple cylindrical metal through-holes (7)；
The first coplanar wave guide feedback structure is symmetrical structure, and central part is the first microstrip line (1), first microstrip line
(1) close to medium substrate (8) edge, the other side is connected with the first serrated metal (5) for side；First coplanar wave guide feedback
The first counterpoise grounding (3) in structure is rectangular microstrip line composition, and passes through six cylindrical metal through-holes (7) and the lower surface
Ground metal layer (9) is connected；
The second coplanar wave guide feedback structure is symmetrical structure, and central part is the second microstrip line (2), second microstrip line
(2) side is connected close to medium substrate (8) edge, the second serrated metal of the other side (6)；The second coplanar wave guide feedback knot
The second counterpoise grounding (4) in structure is rectangular microstrip line composition, and is connect by six cylindrical metal through-holes (7) with the lower surface
Ground metal layer (9) is connected.
2. a kind of SIW zigzag cross-coupling band pass filter according to claim 1, it is characterised in that: described first
Serrated metal (5) is formed by one section of rectangular microstrip line in the first counterpoise grounding (3) extends eight side by side along positive direction of the y-axis
The first dentation metal；The first dentation metal of four, left side is continuously distributed, and the first dentation metal of four, right side is continuously distributed, and closes
In y-axis or so central symmetry.
3. a kind of SIW zigzag cross-coupling band pass filter according to claim 2, it is characterised in that: described first
The first dentation metal of formation is trapezoidal in serrated metal (5), and the number of the first dentation metal is eight, wherein six
A first dentation metal is isosceles trapezoid, and another two the first dentation metal is right-angled trapezium；Wherein the first tooth of right-angled trapezium shape
Shape metal is arranged at left and right sides of x-axis；Wherein trapezoidal longer bottom edge with the rectangular microstrip line in first counterpoise grounding (3)
It is connected, the rectangular microstrip line and the lower surface ground metal layer (9) in first counterpoise grounding (3) pass through ten cylindrical gold
Belong to through-hole (7) connection, wherein cylindrical metal through-hole (7) is continuously distributed along the x-axis direction.
4. a kind of SIW zigzag cross-coupling band pass filter according to claim 1, it is characterised in that: described second
Serrated metal (6) is formed by one section of rectangular microstrip line in the second counterpoise grounding (4) also extends eight simultaneously along negative direction of the y-axis
The second dentation metal of row；The second dentation metal of four, left side is continuously distributed, and the second dentation metal of four, right side is continuously distributed, and
About y-axis or so central symmetry；The second dentation metal in second serrated metal (6) is trapezoidal, second tooth
The number of shape metal is eight, and six of them the second dentation metal is isosceles trapezoid, and another two the second dentation metal is right angle ladder
Shape, wherein the second dentation metal of right-angled trapezium is located at center, and trapezoidal longer bottom edge with second counterpoise grounding
(4) the rectangular microstrip line in is connected, rectangular microstrip line and the lower surface ground metal layer in second counterpoise grounding (4)
(9) it is connected by ten cylindrical metal through-holes (7)；The cylindrical metal through-hole (7) is continuously distributed along the x-axis direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811119782.5A CN109301410B (en) | 2018-09-26 | 2018-09-26 | SIW (substrate integrated waveguide) sawtooth-shaped cross-coupling band-pass filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811119782.5A CN109301410B (en) | 2018-09-26 | 2018-09-26 | SIW (substrate integrated waveguide) sawtooth-shaped cross-coupling band-pass filter |
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| CN109301410A true CN109301410A (en) | 2019-02-01 |
| CN109301410B CN109301410B (en) | 2019-12-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112002970A (en) * | 2020-07-23 | 2020-11-27 | 南京邮电大学 | Miniaturized millimeter wave on-chip band-pass filter |
| CN113555685A (en) * | 2021-07-22 | 2021-10-26 | 维沃移动通信有限公司 | Electronic device |
| CN115621261A (en) * | 2022-11-07 | 2023-01-17 | 材料科学姑苏实验室 | Capacitor device with low physical structure sensitivity and circuit structure |
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| CN202797205U (en) * | 2012-10-22 | 2013-03-13 | 成都位时通科技有限公司 | Sawtooth-shaped microstrip filter |
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| CN106785264A (en) * | 2017-01-04 | 2017-05-31 | 梧州学院 | A kind of sawtooth grooves microwave band-pass filter |
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| EP0109501A1 (en) * | 1982-10-22 | 1984-05-30 | Kernforschungszentrum Karlsruhe Gmbh | Exchangeable filter |
| CN1697249A (en) * | 2005-06-01 | 2005-11-16 | 东南大学 | Wave-guide integrated on substrate-band-pass filter of coplanar wave-guide |
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| CN112002970A (en) * | 2020-07-23 | 2020-11-27 | 南京邮电大学 | Miniaturized millimeter wave on-chip band-pass filter |
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|---|---|
| CN109301410B (en) | 2019-12-13 |
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