CN105846018A - Bandpass filter based on substrate integrated non-radiative dielectric waveguide - Google Patents
Bandpass filter based on substrate integrated non-radiative dielectric waveguide Download PDFInfo
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- CN105846018A CN105846018A CN201610244387.4A CN201610244387A CN105846018A CN 105846018 A CN105846018 A CN 105846018A CN 201610244387 A CN201610244387 A CN 201610244387A CN 105846018 A CN105846018 A CN 105846018A
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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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Abstract
The invention discloses a bandpass filter based on a substrate integrated non-radiative dielectric waveguide. The bandpass filter is implemented through adopting a slot coupling theory on a central dielectric strip of the substrate integrated non-radiative dielectric waveguide on the basis of three layers of circuits consisting of the three-layer substrate integrated non-radiative dielectric waveguide and transition circuits from coplanar waveguides to a slot line. Since surface current at the central dielectric strip is strong, size and position of through holes are reasonably designed, and the bandpass filter with passband being 0.8GHz and good frequency selectivity can be implemented. The bandpass filter based on the substrate integrated non-radiative dielectric waveguide can be implemented smoothly, the integration of a hybrid multi-layer circuit based on microwaves and millimeter waves is realized, the design of millimeter wave band circuits and millimeter wave band devices is facilitated, the manufacturing process is simple, and the cost is low.
Description
Technical field
The present invention relates to a kind of band filter based on the integrated non-radiative Medium Wave Guide of substrate, belong to microwave technical field.
Background technology
Along with the fast development of Modern wireless communication technology, frequency spectrum resource is the most in short supply so that research and the application of microwave circuit are expanded towards millimeter wave and higher frequency section.Rather than radiation medium waveguide has less radiation loss and leakage losses at structural bending and discontinuous place, this characteristic becomes the critical elements in millimeter wave frequency band circuit design.
, there are following two problems when being applied to millimetre-wave circuit design in traditional non-radiative Medium Wave Guide:
1, traditional non-radiative Medium Wave Guide step in processing technology is numerous and diverse, needs upper and lower two pieces of metallic plates are pasted medium strip both sides respectively；And the medium strip height of non-radiative Medium Wave Guide is relevant to operation wavelength, after causing frequency to increase to certain level, craft precision is difficult to meet the making of traditional non-radiative Medium Wave Guide；
2, planar circuit structure has important effect in millimetre-wave circuit designs equally, rather than radiation medium waveguide is as a kind of non-planar circuits structure, needs a kind of change-over circuit of design, it is achieved it is to the conversion of planar circuit.
In order to use non-radiative Medium Wave Guide very easily, design hybrid integrated plane and non-planar circuits, a kind of non-radiative Medium Wave Guide structure being prone to processing and fabricating must be proposed, and on this architecture basics, by proposing on a kind of transition circuit, propose a kind of band filter based on the integrated non-radiative Medium Wave Guide of substrate, realize realization based on microwave and millimeter wave blended multi-layer circuit passive device smoothly.
Summary of the invention
The technical problem to be solved is to provide band pass filter circuit based on the integrated non-radiative Medium Wave Guide of substrate, it is on the basis of the transition circuit of the co-planar waveguide improved to the line of rabbet joint is integrated into the integrated non-radiative Medium Wave Guide of substrate, achieve a band filter by slot-coupled theory, still define the microwave and millimeter wave circuit structure of three layers.
The present invention solves above-mentioned technical problem by the following technical solutions:
The present invention provides a kind of band pass filter circuit based on the integrated non-radiative Medium Wave Guide of substrate, including top layer dielectric-slab, interlayer plate, underlying dielectric plate, top layer metallic layer, bottom metal layer, top layer dielectric-slab, interlayer plate and underlying dielectric plate coaxially stack placement；The length of top layer dielectric-slab is less than or equal to interlayer plate and underlying dielectric plate less than interlayer plate and underlying dielectric plate, width；
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；In top layer dielectric-slab, interlayer plate, the overlapping region of underlying dielectric plate, reserving a central medium band along long side direction broken line, the lateral symmetry at central medium band arranges array type air through hole, thus constitutes the integrated non-radiative Medium Wave Guide of substrate；Wherein, retaining same widths respectively and be not provided with metal level between pair of short edges and the pair of short edges of top layer dielectric-slab of top layer metallic layer, bottom metal layer overlaps in the projection of the lower surface of underlying dielectric plate with top layer metallic layer；
Interlayer plate and the underlapped region of top layer dielectric-slab, one co-planar waveguide transition circuit to the line of rabbet joint is inwardly set from minor face respectively at the two ends of interlayer plate, and two co-planar waveguides are symmetrical about interlayer plate short side direction broken line to the transition circuit of the line of rabbet joint, wherein, the center conduction band of co-planar waveguide is by the minor face of intermediate medium plate, extend internally setting along long side direction broken line, in the metal ground plate of co-planar waveguide, the edge near the projection on interlayer plate of edge and the top layer metallic layer of interlayer plate short side direction broken line overlaps；
The upper surface of interlayer plate, arranges the first triangle grading structure at the line of rabbet joint near one end of the integrated non-radiative Medium Wave Guide of substrate, with adjustment tank line width, realizes impedance matching；Transition circuit at two co-planar waveguides to the line of rabbet joint arranges the second triangle grading structure respectively inwards near one end of the integrated non-radiative Medium Wave Guide of substrate, so that the transition circuit of co-planar waveguide to the line of rabbet joint is accessed the integrated non-radiative Medium Wave Guide of substrate；
Underlying dielectric plate lower surface, from the beginning of the pair of short edges of bottom metal layer, opens dovetail groove respectively inwards, and to match with the second triangle grading structure on interlayer plate, wherein, dovetail groove is symmetrical about long side direction broken line；
On the central medium band of the integrated non-radiative Medium Wave Guide of substrate, being also arranged side by side four air hole, uploaded the coupling of delivery of energy realizing media strip, wherein, four air hole are about the centrosymmetry of this band filter.
nullFurther prioritization scheme as the present invention，Co-planar waveguide to the transition circuit of the line of rabbet joint by center conduction band、First and second metal ground plates、Open circuit detail、The line of rabbet joint、First and second metal bands、Metal throuth hole is constituted，Wherein，Center conduction band、First and second metal ground plates、Open circuit detail、The line of rabbet joint is arranged at the upper surface of interlayer plate，The end of center conduction band arranges perpendicular crossing metal detail，Center conduction band is respectively provided with first with the both sides of metal detail、Second metal ground plate，First、Gap is there is between second metal ground plate，Gap is there is between first metal ground plate and center conduction band，Second metal ground plate and center conduction band、Gap is all there is between metal detail，Metal detail and and the second metal ground plate between gap constitute co-planar waveguide open circuit detail，Open circuit detail is less than the length of center conduction band away from the distance between edge and the minor face of aforementioned intermediate medium plate of the minor face of corresponding intermediate medium plate，First、Gap between second metal ground plate constitutes the line of rabbet joint；First, second metal band is arranged at the lower surface of interlayer plate, and first, second metal band be each perpendicular to center conduction band and open circuit detail and the minor face of aforementioned intermediate medium plate between, the two ends of every metal band are provided with connection metal band and the metal throuth hole of the first and second metal ground plates, wherein, the metal throuth hole against open circuit detail is tangent with open circuit detail.
As the further prioritization scheme of the present invention, in array type air through hole, the spacing between size and the through hole of through hole determines according to the operating frequency of circuit.
As the further prioritization scheme of the present invention, the second triangle grading structure is positioned in the integrated non-radiative Medium Wave Guide of substrate the region of reserved central medium band.
As the further prioritization scheme of the present invention, the first triangle grading structure is positioned at the overlapping region of top layer dielectric-slab and interlayer plate.
As the further prioritization scheme of the present invention, starting to open respectively inwards rectangular channel from the pair of short edges of underlying dielectric plate, with stabilizing circuit, wherein, rectangular channel is symmetrical about long side direction broken line.
The present invention uses above technical scheme compared with prior art, have following technical effect that the processing technology that this invention simplifies non-radiative Medium Wave Guide, effectively suppression substrate integrated non-radiative Medium Wave Guide leakage losses at air hole, it is placed on intermediate medium substrate the co-planar waveguide improved and is integrated in the two ends of dielectric-slab to the transition circuit of the line of rabbet joint, reduce the electromagnetic interference of generation between circuit；The planarization of circuit of the integration realization of multilayer circuit, also reduces corresponding processing cost while simplifying processing technology；On central medium band, four air hole side by side serve the effect of slot-coupled；Simultaneously, the present invention uses three layers of circuit structure, makes full use of space, and processing technology is simple, flexibly simultaneously, can realize, based on the integrated non-radiative Medium Wave Guide band pass filter circuit of substrate, providing foundation for the design based on hybrid integrated multi-layer passive devices of microwave and millimeter wave section.
Accompanying drawing explanation
Fig. 1 is the tomograph of the present invention.
Fig. 2 is top view and the side view of the present invention, and wherein, (a) is top view, and (b) is side view.
Wherein, 1-center conduction band；Gap between 2-center conduction band and metal ground plate；3-metal band；4-metal throuth hole；5-metal ground plate；6-rectangular channel；7-the second triangle grading structure；8-the first triangle grading structure；9-dovetail groove；Spacing between 10-array type air through hole；The diameter of 11-array type air through hole；12-underlying dielectric plate；13-interlayer plate；14-top layer dielectric-slab.
Fig. 3 is the top view of top layer dielectric-slab.
Fig. 4 is the top view of interlayer plate.
Fig. 5 is the co-planar waveguide structure chart to line of rabbet joint transition circuit.
Fig. 6 is the upward view of interlayer plate.
Fig. 7 is the upward view of underlying dielectric plate.
Fig. 8 is emulation and the S parameter figure of measurement of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings technical scheme is described in further detail:
The present invention provides a kind of present invention to be a kind of band pass filter circuit structure based on the integrated non-radiative Medium Wave Guide of substrate, as Fig. 1 is to shown in 7, and the transition circuit of the co-planar waveguide wherein improved to the line of rabbet joint and the integrated non-radiative Medium Wave Guide of substrate are integrated on same dielectric-slab；The co-planar waveguide improved is integrated in the intermediate layer of whole circuit to the transition circuit of the line of rabbet joint, by triangle grading structure, the transition circuit of the co-planar waveguide improved to the line of rabbet joint is accessed the integrated non-radiative Medium Wave Guide of substrate, simultaneously when adjusting the line of rabbet joint width at transition circuit, triangle gradual change is also used to realize impedance matching；Rectangular channel has also been opened at the two ends of underlying dielectric plate, avoids the impact on the co-planar waveguide improved to the transition circuit performance of the line of rabbet joint while stabilizing circuit；From the beginning of the pair of short edges of bottom metal layer, open dovetail groove respectively inwards, match with the triangle gradual change at intermediate medium substrate, preferably realize the impedance matching of transition position.The co-planar waveguide of the improvement being symmetrically disposed at the two ends of dielectric-slab is equivalently-sized to the transition circuit of the line of rabbet joint, it is to avoid the electromagnetic interference between circuit.Employing slot-coupled is theoretical, the central medium band of the integrated non-radiative Medium Wave Guide of substrate is stamped four size air hole different with gap side by side, by the distance between size and the through hole of appropriate design air hole, media strip can be realized and upload the coupling of delivery of energy, form the band filter that a band-pass behavior is good.
The integrated non-radiative Medium Wave Guide of substrate is directly to realize on the dielectric-slab of three layers, its manufacture method is: using the dielectric-slab of three layers and the metal level of upper and lower surface thereof as the metallic plate of traditional non-radiative Medium Wave Guide, the zone line of dielectric-slab reserves a central medium band, design a series of air hole in media strip both sides, thus constitute the integrated non-radiative Medium Wave Guide of substrate.Wherein, air hole quantity is determined by printed circuit board sizes；The diameter of air hole is relevant to circuit work frequency with spacing.
In embodiments of the invention, the medium substrate thickness at the transition circuit place of the co-planar waveguide of improvement to the line of rabbet joint is 0.635mm, relative dielectric constant is 6.15；The gross thickness of three layers of medium substrate be 6.35mm(underlying dielectric plate thickness be 2.54mm, intermediate layer be 0.635mm, upper strata be 3.175mm), relative dielectric constant is 6.15；A diameter of 3.1mm of intermediate air through hole, the distance between middle first air hole and the second air hole is 8.9mm, and the distance between the second air hole and the 3rd air hole is 5.5mm.Can apply in the circuit design of millimere-wave band based on the integrated non-radiative Medium Wave Guide of substrate, and can be with in hybrid integrated to multilayer circuit；Further, the present invention proposes based on the integrated non-radiative Medium Wave Guide band pass filter circuit of substrate, can effectively realize planarization and the hybrid integrated of microwave and millimeter wave multilayer circuit of circuit, corresponding simulation result is as shown in Figure 8, can be seen that achieving passband is 0.8GHz, mid frequency is the bandpass filter of 14.2GHz, and wherein in transition band width, return loss is relatively low, below 22dB can be reached, illustrate that this wave filter has preferable frequency selectivity performance.
Present invention band filter based on the integrated non-radiative Medium Wave Guide of substrate makes full use of space, decreases the electromagnetic interference produced between circuit.This filter construction can effectively suppress substrate integrated non-radiative Medium Wave Guide leakage losses at air hole, be integrated in intermediate medium plate two ends improve co-planar waveguide to the transition circuit of the line of rabbet joint, reduce the coupling between circuit and interference.Therefore, the present invention is that the design of microwave and millimeter wave frequency range hybrid integrated multi-layer passive devices provides foundation.The present invention is also on the central medium band at the integrated non-radiative Medium Wave Guide of substrate, employing slot-coupled is theoretical, stamp the air hole that size is different with gap, it is possible to achieve media strip uploads the coupling of delivery of energy, form a band filter with good frequency selectivity.Present configuration concision and compact, functional in passband, there is preferable frequency selectivity, it is easy to process, meet Modern wireless communication planarization, multilamellar hybrid integrated and high performance requirement.Present invention achieves based on microwave and millimeter wave blended multi-layer circuit integrated, beneficially millimeter wave frequency band circuit and the design of device, processing technology is simple, with low cost.
The above; it is only the detailed description of the invention in the present invention; but protection scope of the present invention is not limited thereto; any it is familiar with the people of this technology in the technical scope that disclosed herein; it is appreciated that the conversion or replacement expected; all should contain within the scope of the comprising of the present invention, therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (6)
1. band pass filter circuit based on the integrated non-radiative Medium Wave Guide of substrate, it is characterized in that, including top layer dielectric-slab, interlayer plate, underlying dielectric plate, top layer metallic layer, bottom metal layer, top layer dielectric-slab, interlayer plate and underlying dielectric plate coaxially stack placement；The length of top layer dielectric-slab is less than or equal to interlayer plate and underlying dielectric plate less than interlayer plate and underlying dielectric plate, width；
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；In top layer dielectric-slab, interlayer plate, the overlapping region of underlying dielectric plate, reserving a central medium band along long side direction broken line, the lateral symmetry at central medium band arranges array type air through hole, thus constitutes the integrated non-radiative Medium Wave Guide of substrate；Wherein, retaining same widths respectively and be not provided with metal level between pair of short edges and the pair of short edges of top layer dielectric-slab of top layer metallic layer, bottom metal layer overlaps in the projection of the lower surface of underlying dielectric plate with top layer metallic layer；
Interlayer plate and the underlapped region of top layer dielectric-slab, one co-planar waveguide transition circuit to the line of rabbet joint is inwardly set from minor face respectively at the two ends of interlayer plate, and two co-planar waveguides are symmetrical about interlayer plate short side direction broken line to the transition circuit of the line of rabbet joint, wherein, the center conduction band of co-planar waveguide is by the minor face of intermediate medium plate, extend internally setting along long side direction broken line, in the metal ground plate of co-planar waveguide, the edge near the projection on interlayer plate of edge and the top layer metallic layer of interlayer plate short side direction broken line overlaps；
The upper surface of interlayer plate, arranges the first triangle grading structure at the line of rabbet joint near one end of the integrated non-radiative Medium Wave Guide of substrate, with adjustment tank line width, realizes impedance matching；Transition circuit at two co-planar waveguides to the line of rabbet joint arranges the second triangle grading structure respectively inwards near one end of the integrated non-radiative Medium Wave Guide of substrate, so that the transition circuit of co-planar waveguide to the line of rabbet joint is accessed the integrated non-radiative Medium Wave Guide of substrate；
Underlying dielectric plate lower surface, from the beginning of the pair of short edges of bottom metal layer, opens dovetail groove respectively inwards, and to match with the second triangle grading structure on interlayer plate, wherein, dovetail groove is symmetrical about long side direction broken line；
On the central medium band of the integrated non-radiative Medium Wave Guide of substrate, being also arranged side by side four air hole, uploaded the coupling of delivery of energy realizing media strip, wherein, four air hole are about the centrosymmetry of this band filter.
nullBand pass filter circuit based on the integrated non-radiative Medium Wave Guide of substrate the most according to claim 1，It is characterized in that，Co-planar waveguide to the transition circuit of the line of rabbet joint by center conduction band、First and second metal ground plates、Open circuit detail、The line of rabbet joint、First and second metal bands、Metal throuth hole is constituted，Wherein，Center conduction band、First and second metal ground plates、Open circuit detail、The line of rabbet joint is arranged at the upper surface of interlayer plate，The end of center conduction band arranges perpendicular crossing metal detail，Center conduction band is respectively provided with first with the both sides of metal detail、Second metal ground plate，First、Gap is there is between second metal ground plate，Gap is there is between first metal ground plate and center conduction band，Second metal ground plate and center conduction band、Gap is all there is between metal detail，Metal detail and and the second metal ground plate between gap constitute co-planar waveguide open circuit detail，Open circuit detail is less than the length of center conduction band away from the distance between edge and the minor face of aforementioned intermediate medium plate of the minor face of corresponding intermediate medium plate，First、Gap between second metal ground plate constitutes the line of rabbet joint；First, second metal band is arranged at the lower surface of interlayer plate, and first, second metal band be each perpendicular to center conduction band and open circuit detail and the minor face of aforementioned intermediate medium plate between, the two ends of every metal band are provided with connection metal band and the metal throuth hole of the first and second metal ground plates, wherein, the metal throuth hole against open circuit detail is tangent with open circuit detail.
Band pass filter circuit based on the integrated non-radiative Medium Wave Guide of substrate the most according to claim 1, it is characterised in that in array type air through hole, the spacing between size and the through hole of through hole determines according to the operating frequency of circuit.
Band pass filter circuit based on the integrated non-radiative Medium Wave Guide of substrate the most according to claim 1, it is characterised in that the second triangle grading structure is positioned in the integrated non-radiative Medium Wave Guide of substrate the region of reserved central medium band.
Band pass filter circuit based on the integrated non-radiative Medium Wave Guide of substrate the most according to claim 1, it is characterised in that the first triangle grading structure is positioned at the overlapping region of top layer dielectric-slab and interlayer plate.
Band pass filter circuit based on the integrated non-radiative Medium Wave Guide of substrate the most according to claim 1, it is characterized in that, start to open respectively inwards rectangular channel from the pair of short edges of underlying dielectric plate, with stabilizing circuit, wherein, rectangular channel is symmetrical about long side direction broken line.
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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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| CN105846018B CN105846018B (en) | 2018-06-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923104A (en) * | 2018-06-21 | 2018-11-30 | 云南大学 | Highly selective substrate integrates gap waveguide bandpass filter |
| CN109687068A (en) * | 2018-07-17 | 2019-04-26 | 云南大学 | Broadband SIGW bandpass filter |
| CN111244587A (en) * | 2020-01-19 | 2020-06-05 | 西安电子科技大学 | Double-frequency third-order band-pass filter based on microstrip ridge gap waveguide |
| CN116315553A (en) * | 2023-04-10 | 2023-06-23 | 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 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923104A (en) * | 2018-06-21 | 2018-11-30 | 云南大学 | Highly selective substrate integrates gap waveguide bandpass filter |
| CN108923104B (en) * | 2018-06-21 | 2024-04-19 | 云南大学 | High-selectivity substrate integrated gap waveguide band-pass filter |
| CN109687068A (en) * | 2018-07-17 | 2019-04-26 | 云南大学 | Broadband SIGW bandpass filter |
| CN109687068B (en) * | 2018-07-17 | 2023-09-01 | 云南大学 | Broadband SIGW band-pass filter |
| CN111244587A (en) * | 2020-01-19 | 2020-06-05 | 西安电子科技大学 | Double-frequency third-order band-pass filter based on microstrip ridge gap waveguide |
| 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 |
| CN116315553A (en) * | 2023-04-10 | 2023-06-23 | 电子科技大学 | Transition structure suitable for substrate integrated waveguide-microstrip |
| CN116315553B (en) * | 2023-04-10 | 2024-04-12 | 电子科技大学 | Transition structure suitable for substrate integrated waveguide-microstrip |
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