CN105846018B - The bandpass filter of non-radiative Medium Wave Guide is integrated based on substrate - Google Patents
The bandpass filter of non-radiative Medium Wave Guide is integrated based on substrate Download PDFInfo
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- CN105846018B CN105846018B CN201610244387.4A CN201610244387A CN105846018B CN 105846018 B CN105846018 B CN 105846018B CN 201610244387 A CN201610244387 A CN 201610244387A CN 105846018 B CN105846018 B CN 105846018B
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- wave guide
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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
Abstract
The invention discloses a kind of with bandpass filter circuits that non-radiative Medium Wave Guide is integrated based on substrate, it is on three layers of circuit base for integrating non-radiative Medium Wave Guide composition in the transition circuit of co-planar waveguide to the line of rabbet joint and three layers of substrate, the central medium item that non-radiative Medium Wave Guide is integrated in substrate takes through slot-coupled theory to realize.Since the surface current at central medium band is stronger, the size and location of through hole is rationally designed, passband can be realized for 0.8GHz, the good with bandpass filters of frequency selectivity.The present invention can smoothly realize the with bandpass filters that non-radiative Medium Wave Guide is integrated based on substrate, realize integrating based on microwave and millimeter wave blended multi-layer circuit, be conducive to the design of millimeter wave frequency band circuit and device, manufacture craft is simple, of low cost.
Description
Technical field
The present invention relates to a kind of bandpass filters that non-radiative Medium Wave Guide is integrated based on substrate, belong to microwave technology neck
Domain.
Background technology
With the fast development of Modern wireless communication technology, frequency spectrum resource is increasingly in short supply so that the research of microwave circuit and
It is expanded using towards millimeter wave and higher frequency range.Rather than radiation medium waveguide has smaller radiation in structural bending and discontinuous place
Loss and leakage losses, this characteristic become the critical elements in millimeter wave frequency band circuit design.
But traditional non-radiative Medium Wave Guide has following two when being applied to millimetre-wave circuit design：
1st, the non-radiative Medium Wave Guide step in manufacture craft of tradition is numerous and diverse, it is necessary to which upper and lower two pieces of metallic plates are pasted respectively
To medium strip both sides；And the medium strip height of non-radiative Medium Wave Guide is related to operation wavelength, and frequency is caused to increase to centainly
After level, craft precision is difficult to the making for meeting the non-radiative Medium Wave Guide of tradition；
2nd, planar circuit structure equally has important role rather than radiation medium waveguide to make in millimetre-wave circuit design
For a kind of non-planar circuits structure, it is necessary to design a kind of conversion circuit, realize that it arrives the conversion of planar circuit.
In order to very easily use non-radiative Medium Wave Guide, hybrid integrated plane and non-planar circuits are designed, it is necessary to carry
Go out a kind of non-radiative Medium Wave Guide structure of making easy to process, and on this architecture basics, by proposing a kind of transition electricity
On the road, propose a kind of bandpass filter that non-radiative Medium Wave Guide is integrated based on substrate, smoothly realize and mixed based on microwave and millimeter wave
Close the realization of multilayer circuit passive device.
The content of the invention
The technical problems to be solved by the invention are to provide the bandpass filter that non-radiative Medium Wave Guide is integrated based on substrate
Circuit is to be integrated into the transition circuit of improved co-planar waveguide to the line of rabbet joint on the basis of substrate integrates non-radiative Medium Wave Guide, leads to
Crossing slot-coupled theory realizes a bandpass filter, still forms one three layers of microwave and millimeter wave circuit structure.
The present invention uses following technical scheme to solve above-mentioned technical problem：
The present invention provides a kind of band pass filter circuit that non-radiative Medium Wave Guide is integrated based on substrate, including top layer medium
Plate, interlayer plate, underlying dielectric plate, top layer metallic layer, bottom metal layer, top layer dielectric-slab, interlayer plate and bottom
Layer dielectric-slab coaxially stacks placement；The length of top layer dielectric-slab be less than interlayer plate and underlying dielectric plate, width be less than or
Equal to interlayer plate and underlying dielectric plate；
Top layer metallic layer is arranged on the upper surface of top layer dielectric-slab, and bottom metal layer is arranged on the following table of underlying dielectric plate
Face；Top layer dielectric-slab, interlayer plate, underlying dielectric plate overlapping region, reserved along long side direction broken line in one
Heart media strip is symmetrical arranged array type air through hole in the both sides of central medium band, so as to form substrate integrate it is non-radiative
Medium Wave Guide；Wherein, same widths are retained respectively between a pair of short edges of top layer metallic layer and a pair of short edges of top layer dielectric-slab
Metal layer is not provided with, bottom metal layer is overlapped with projection of the top layer metallic layer in the lower surface of underlying dielectric plate；
The underlapped region of interlayer plate and top layer dielectric-slab, the both ends of interlayer plate respectively from short side to
The interior transition circuit that a co-planar waveguide is set to the line of rabbet joint, and the transition circuit of two co-planar waveguides to the line of rabbet joint is situated between on interlayer
Scutum short side direction broken line is symmetrical, wherein, the center conduction band of co-planar waveguide by the short side of intermediate medium plate, along long side side
It extends internally setting to broken line, close to the side of interlayer plate short side direction broken line in the metal ground plate of co-planar waveguide
It is overlapped along the edge of the projection with top layer metallic layer on interlayer plate；
The upper surface of interlayer plate integrates one end setting the one or three of non-radiative Medium Wave Guide in the line of rabbet joint close to substrate
Angular grading structure with adjustment tank line width, realizes impedance matching；Two co-planar waveguides to the line of rabbet joint transition circuit close to base
One end that piece integrates non-radiative Medium Wave Guide sets the second triangle grading structure respectively inwards, and co-planar waveguide is arrived the line of rabbet joint
Transition circuit access substrate integrates non-radiative Medium Wave Guide；
Underlying dielectric plate lower surface, since a pair of short edges of bottom metal layer, opens dovetail groove respectively inwards, with centre
The second triangle grading structure on layer dielectric-slab matches, wherein, dovetail groove is symmetrical on long side direction broken line；
The central medium item that substrate integrates non-radiative Medium Wave Guide takes, and is also arranged side by side there are four air hole, with reality
The coupling of transmission energy on existing media strip, wherein, central symmetry of four air holes on the bandpass filter.
As the further prioritization scheme of the present invention, the transition circuit of co-planar waveguide to the line of rabbet joint is by center conduction band, the first and
Second metal ground plate, open circuit detail, the line of rabbet joint, the first and second metal bands, metal throuth hole are formed, wherein, center conduction band, the
One and second metal ground plate, open circuit detail, the line of rabbet joint be arranged at the upper surface of interlayer plate, the end of center conduction band
Perpendicular intersecting metal detail is set, and center conduction band and the both sides of metal detail set first, second metallic ground respectively
Plate, there are gap between first, second metal ground plate, there are gap between the first metal ground plate and center conduction band, second
There are gap, metal detail and its between the second metal ground plate between metal ground plate and center conduction band, metal detail
Gap form co-planar waveguide open circuit detail, open a way detail in away from corresponding intermediate medium plate short side edge with it is foregoing in
Between the distance between the short side of dielectric-slab be less than the length of center conduction band, the gap between first, second metal ground plate is formed
The line of rabbet joint；First, second metal band is arranged at the lower surface of interlayer plate, and first, second metal band is vertical
In center conduction band and between open circuit detail and the short side of foregoing intermediate medium plate, the both ends of every metal band are both provided with
The metal throuth hole of metal band and the first and second metal ground plates is connected, wherein, the metal throuth hole against open circuit detail is with opening
Road detail is tangent.
As the further prioritization scheme of the present invention, the spacing in array type air through hole between the size of through hole and through hole
It is determined according to the working frequency of band pass filter circuit.
As the further prioritization scheme of the present invention, the second triangle grading structure is located at substrate and integrates non-radiative medium ripple
In the region for leading reserved central medium band.
As the further prioritization scheme of the present invention, the first triangle grading structure is located at top layer dielectric-slab and is situated between with interlayer
The overlapping region of scutum.
As the further prioritization scheme of the present invention, rectangle is opened respectively inwards since a pair of short edges of underlying dielectric plate
Slot, with stabilizing circuit, wherein, rectangular channel is symmetrical on long side direction broken line.
The present invention compared with prior art, has following technique effect using above technical scheme：This invention simplifies non-
The manufacture craft of radiation medium waveguide effectively inhibits substrate and integrates leakage losses of the non-radiative Medium Wave Guide at air hole,
The transition circuit for being placed on improved co-planar waveguide to the line of rabbet joint on intermediate medium substrate is integrated in the both ends of dielectric-slab, reduces electricity
The electromagnetic interference generated between road；The planarization of circuit of the integration realization of multilayer circuit, while simplifying manufacture craft also
Reduce corresponding processing cost；Play the role of slot-coupled in four air holes that central medium item takes side by side；
Meanwhile the present invention makes full use of space, while manufacture craft is simple, flexible, can realize based on base using three layers of circuit structure
Piece integrates non-radiative Medium Wave Guide band pass filter circuit, is microwave and millimeter wave section setting based on hybrid integrated multi-layer passive devices
Meter provides foundation.
Description of the drawings
Fig. 1 is the tomograph of the present invention.
Fig. 2 is the top view and side view of the present invention, wherein,（a）It is top view,（b）It is side view.
Wherein, 1- centers conduction band；Gap between 2- centers conduction band and metal ground plate；3- metal bands；4- metals lead to
Hole；5- metal ground plates；6- rectangular channels；7- the second triangle grading structures；8- the first triangle grading structures；9- dovetail grooves；
Spacing between 10- array type air through holes；The diameter of 11- array type air through holes；12- underlying dielectric plates；13- interlayers are situated between
Scutum；14- top layer dielectric-slabs.
Fig. 3 is the top view of top layer dielectric-slab.
Fig. 4 is the top view of interlayer plate.
Fig. 5 is structure chart of the co-planar waveguide to line of rabbet joint transition circuit.
Fig. 6 is the bottom view of interlayer plate.
Fig. 7 is the bottom view of underlying dielectric plate.
Fig. 8 is the S parameter figure of emulation and the measurement of the embodiment of the present invention.
Specific embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings：
It is a kind of band pass filter circuit that non-radiative Medium Wave Guide is integrated based on substrate that the present invention, which provides a kind of present invention,
Structure, as shown in Fig. 1 to 7, wherein the transition circuit and substrate of improved co-planar waveguide to the line of rabbet joint integrate non-radiative Medium Wave Guide
It is integrated on same dielectric-slab；The transition circuit of improved co-planar waveguide to the line of rabbet joint is integrated in the interlayer of entire circuit, passes through
The transition circuit access substrate of improved co-planar waveguide to the line of rabbet joint is integrated non-radiative Medium Wave Guide by triangle grading structure, simultaneously
When adjusting the line of rabbet joint width at transition circuit, also impedance matching is realized using triangle gradual change；The both ends of underlying dielectric plate
Rectangular channel has also been opened, the shadow to the transition circuit performance of improved co-planar waveguide to the line of rabbet joint is avoided while stabilizing circuit
It rings；Since a pair of short edges of bottom metal layer, dovetail groove is opened respectively inwards, with the triangle gradual change phase at intermediate medium substrate
It coincide, preferably realizes the impedance matching of transition position.The improved co-planar waveguide at the both ends of dielectric-slab is symmetrically disposed to the line of rabbet joint
Transition circuit size it is identical, avoid the electromagnetic interference between circuit.It is theoretical using slot-coupled, it is integrated in substrate non-radiative
The central medium item of Medium Wave Guide takes stamps four size air holes different with gap side by side, by rationally designing air
The distance between the size of through hole and through hole, it can be achieved that on media strip transmission energy coupling, formed a band-pass behavior it is good
Good bandpass filter.
It is directly to be realized on three layers of dielectric-slab that substrate, which integrates non-radiative Medium Wave Guide, and production method is：By three
The metallic plate of the dielectric-slab of layer and its metal layer of upper and lower surface as the non-radiative Medium Wave Guide of tradition, the intermediate region of dielectric-slab
Reserve a central medium band, a series of air holes designed in media strip both sides, so as to form substrate integrate it is non-radiative
Medium Wave Guide.Wherein, air hole quantity is determined by printed circuit board sizes；The diameter and spacing of air hole work with circuit
Frequency dependence.
In the embodiment of the present invention, the medium substrate thickness where improved co-planar waveguide to the transition circuit of the line of rabbet joint is
0.635mm, relative dielectric constant 6.15；The overall thickness of three layers of medium substrate is 6.35mm（Underlying dielectric plate thickness is
2.54mm, interlayer 0.635mm, upper strata 3.175mm）, relative dielectric constant 6.15；Intermediate air through hole it is a diameter of
3.1mm, intermediate the distance between first air hole and the second air hole are 8.9mm, the second air hole and the 3rd air
The distance between through hole is 5.5mm.Circuit design in millimere-wave band can be applied by integrating non-radiative Medium Wave Guide based on substrate
In, and can be with hybrid integrated into multilayer circuit；Further, the present invention proposes to integrate non-radiative Medium Wave Guide band based on substrate
Bandpass filter circuit can effectively realize the planarization of circuit and the hybrid integrated of microwave and millimeter wave multilayer circuit, corresponding imitative
It is true that the results are shown in Figure 8, it can be seen that passband is realized as 0.8GHz, centre frequency is the with bandpass filters of 14.2GHz, wherein
Return loss is relatively low in transition band width, can reach below 22dB, illustrates that the wave filter has preferable frequency selectivity
Performance.
The bandpass filter that non-radiative Medium Wave Guide is integrated the present invention is based on substrate makes full use of space, reduce circuit it
Between the electromagnetic interference that generates.This filter construction can effectively inhibit substrate and integrate non-radiative Medium Wave Guide at air hole
Leakage losses, be integrated in the improved co-planar waveguide in intermediate medium plate both ends to the transition circuit of the line of rabbet joint, reduce between circuit
Coupling and interference.Therefore, the present invention provides foundation for the design of microwave and millimeter wave frequency range hybrid integrated multi-layer passive devices.
The present invention also takes in the central medium item that non-radiative Medium Wave Guide is integrated in substrate, theoretical using slot-coupled, stamps size
The air hole different with gap can realize the coupling of transmission energy on media strip, and forming one, there is good frequency to select
The bandpass filter of selecting property.The present invention is simple for structure compact, functional in passband, has preferable frequency selectivity, is easy to
Process meets Modern wireless communication planarization, multilayer hybrid integrated and high performance requirement.The present invention is realized based on micro-
Integrating for ripple millimeter wave blended multi-layer circuit, is conducive to the design of millimeter wave frequency band circuit and device, manufacture craft is simple, cost
It is cheap.
The above is only the specific embodiment in the present invention, but protection scope of the present invention is not limited thereto, and is appointed
What be familiar with the people of the technology disclosed herein technical scope in, it will be appreciated that the conversion or replacement expected should all be covered
Within the scope of the present invention, therefore, protection scope of the present invention should be subject to the protection domain of claims.
Claims (6)
1. the band pass filter circuit of non-radiative Medium Wave Guide is integrated based on substrate, which is characterized in that including top layer dielectric-slab, in
Interbed dielectric-slab, underlying dielectric plate, top layer metallic layer, bottom metal layer, top layer dielectric-slab, interlayer plate and underlying dielectric
Plate coaxially stacks placement；During the length of top layer dielectric-slab is less than or equal to less than interlayer plate and underlying dielectric plate, width
Interbed dielectric-slab and underlying dielectric plate；
Top layer metallic layer is arranged on the upper surface of top layer dielectric-slab, and bottom metal layer is arranged on the lower surface of underlying dielectric plate；
A central medium is reserved in top layer dielectric-slab, interlayer plate, the overlapping region of underlying dielectric plate along long side direction broken line
Band is symmetrical arranged array type air through hole in the both sides of central medium band, and non-radiative medium ripple is integrated so as to form substrate
It leads；Wherein, retain same widths between a pair of short edges of top layer metallic layer and a pair of short edges of top layer dielectric-slab respectively to be not provided with
Metal layer, bottom metal layer are overlapped with projection of the top layer metallic layer in the lower surface of underlying dielectric plate；
The underlapped region of interlayer plate and top layer dielectric-slab, inwardly sets at the both ends of interlayer plate from short side respectively
A co-planar waveguide is put to the transition circuit of the line of rabbet joint, and two co-planar waveguides to the line of rabbet joint transition circuit on interlayer plate
Short side direction broken line is symmetrical, wherein, the center conduction band of co-planar waveguide by the short side of intermediate medium plate, along long side direction pair
Broken line extends internally setting, in the metal ground plate of co-planar waveguide close to the edge of interlayer plate short side direction broken line with
The edge of projection of the top layer metallic layer on interlayer plate overlaps；
The upper surface of interlayer plate integrates the first triangle of one end setting of non-radiative Medium Wave Guide in the line of rabbet joint close to substrate
Grading structure with adjustment tank line width, realizes impedance matching；Two co-planar waveguides to the line of rabbet joint transition circuit close to substrate collection
The second triangle grading structure is set respectively inwards into one end of non-radiative Medium Wave Guide, by the transition of co-planar waveguide to the line of rabbet joint
Circuit access substrate integrates non-radiative Medium Wave Guide；
Underlying dielectric plate lower surface, since a pair of short edges of bottom metal layer, opens dovetail groove respectively inwards, to be situated between with interlayer
The second triangle grading structure on scutum matches, wherein, dovetail groove is symmetrical on long side direction broken line；
The central medium item that substrate integrates non-radiative Medium Wave Guide takes, and is also arranged side by side there are four air hole, is situated between with realizing
The coupling of transmission energy on matter band, wherein, central symmetry of four air holes on the bandpass filter.
2. the band pass filter circuit according to claim 1 that non-radiative Medium Wave Guide is integrated based on substrate, feature are existed
In the transition circuit of co-planar waveguide to the line of rabbet joint is by center conduction band, the first and second metal ground plates, open circuit detail, the line of rabbet joint, first
It is formed with the second metal band, metal throuth hole, wherein, center conduction band, the first and second metal ground plates, open circuit detail, the line of rabbet joint
The upper surface of interlayer plate is arranged at, the end of center conduction band sets perpendicular intersecting metal detail, center
The both sides of conduction band and metal detail set first, second metal ground plate respectively, between existing between first, second metal ground plate
Gap, there are gap between the first metal ground plate and center conduction band, between the second metal ground plate and center conduction band, metal detail
Gap there are gap, metal detail and its between the second metal ground plate forms the open circuit detail of co-planar waveguide, open circuit
The distance between short side of the edge of the short side away from corresponding intermediate medium plate and foregoing intermediate medium plate is less than center in detail
The length of conduction band, the gap between first, second metal ground plate form the line of rabbet joint；During first, second metal band is arranged at
The lower surface of interbed dielectric-slab, and first, second metal band be each perpendicular to center conduction band and positioned at open circuit detail with it is foregoing in
Between dielectric-slab short side between, the both ends of every metal band are both provided with connection metal band and the first and second metallic grounds
The metal throuth hole of plate, wherein, the metal throuth hole and open circuit detail against open circuit detail are tangent.
3. the band pass filter circuit according to claim 1 that non-radiative Medium Wave Guide is integrated based on substrate, feature are existed
In the spacing in array type air through hole between the size of through hole and through hole is true according to the working frequency of band pass filter circuit
It is fixed.
4. the band pass filter circuit according to claim 1 that non-radiative Medium Wave Guide is integrated based on substrate, feature are existed
In the second triangle grading structure is located at substrate and integrates in the region for the central medium band reserved in non-radiative Medium Wave Guide.
5. the band pass filter circuit according to claim 1 that non-radiative Medium Wave Guide is integrated based on substrate, feature are existed
In the first triangle grading structure is located at the overlapping region of top layer dielectric-slab and interlayer plate.
6. the band pass filter circuit according to claim 1 that non-radiative Medium Wave Guide is integrated based on substrate, feature are existed
In, rectangular channel is opened respectively inwards since a pair of short edges of underlying dielectric plate, with stabilizing circuit, wherein, rectangular channel is on long side
Direction broken line is symmetrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610244387.4A CN105846018B (en) | 2016-04-19 | 2016-04-19 | The bandpass filter of non-radiative Medium Wave Guide is integrated based on substrate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610244387.4A CN105846018B (en) | 2016-04-19 | 2016-04-19 | The bandpass filter of non-radiative Medium Wave Guide is integrated based on substrate |
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| CN105846018A CN105846018A (en) | 2016-08-10 |
| CN105846018B true CN105846018B (en) | 2018-06-05 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923104B (en) * | 2018-06-21 | 2024-04-19 | 云南大学 | High-selectivity substrate integrated gap waveguide band-pass filter |
| CN109687068B (en) * | 2018-07-17 | 2023-09-01 | 云南大学 | Broadband SIGW band-pass filter |
| CN111244587B (en) * | 2020-01-19 | 2021-06-15 | 西安电子科技大学 | Double-frequency third-order band-pass filter based on microstrip ridge gap waveguide |
| CN116315553B (en) * | 2023-04-10 | 2024-04-12 | 电子科技大学 | Transition structure suitable for substrate integrated waveguide-microstrip |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868213A (en) * | 2015-04-20 | 2015-08-26 | 南京邮电大学 | Novel substrate integrated non-radiation dielectric waveguide feed structure |
| CN104953222A (en) * | 2015-06-26 | 2015-09-30 | 南京邮电大学 | Structure transiting from coplanar waveguide to slot line and applied to multi-layer circuit |
-
2016
- 2016-04-19 CN CN201610244387.4A patent/CN105846018B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868213A (en) * | 2015-04-20 | 2015-08-26 | 南京邮电大学 | Novel substrate integrated non-radiation dielectric waveguide feed structure |
| CN104953222A (en) * | 2015-06-26 | 2015-09-30 | 南京邮电大学 | Structure transiting from coplanar waveguide to slot line and applied to multi-layer circuit |
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