CN106099274A - A kind of slot-coupled compensates 1/8th mould substrate integral wave guide filters of fractal defect sturcture - Google Patents
A kind of slot-coupled compensates 1/8th mould substrate integral wave guide filters of fractal defect sturcture Download PDFInfo
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- CN106099274A CN106099274A CN201610361542.0A CN201610361542A CN106099274A CN 106099274 A CN106099274 A CN 106099274A CN 201610361542 A CN201610361542 A CN 201610361542A CN 106099274 A CN106099274 A CN 106099274A
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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
- H01P1/20309—Strip line filters with dielectric resonator
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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
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
- H01P1/2084—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators
Abstract
The present invention relates to a kind of slot-coupled and compensate 1/8th mould substrate integral wave guide filters of fractal defect sturcture, this wave filter includes: dielectric substrate and be arranged on metal patch and the metal throuth hole of substrate upper and lower surface；Metal patch includes input/output port microstrip line and first, second, third and fourth resonator cavity with equilateral right angled triangle defect sturcture；It is provided with the first electric coupling between described first and second resonator cavitys, second and the 3rd resonator cavity be provided with the second electric coupling, and on the right-angle side that second and third resonator cavity is adjacent, etch compensating for coupling gap to strengthen the negative coupling between two resonator cavitys, being provided with the 3rd electric coupling between third and fourth resonator cavity, first and the 4th realizes magnetic coupling by perception window between resonator cavity.The invention have the benefit that this wave filter has a compact conformation, compact in size, stable performance and be prone to the feature of the system integration.
Description
Technical field
The present invention relates to microwave and millimeter wave filter field, be specifically related to substrate integral wave guide filter field.
Background technology
Proposing multiple substrate integral wave guide filter in recent years, substrate integral wave guide filter is by conventional metals waveguide junction
Structure deforms, and opens two row's metal throuth holes in common substrate, is used for replacing the narrow limit of conventional waveguide, and substrate integration wave-guide is being protected
While having stayed the series of advantages of conventional waveguide, it is also possible to realize seamless integrated with widely used microstrip circuit.Substrate
Integrated wave guide structure has possessed that loss is little, it is little to radiate, high q-factor, be prone to processing and safeguard and the advantage of small in volume, suitable
Close design and the large-scale production of microwave and millimeter wave circuit.But microstrip filter, substrate integral wave guide filter size relatively
The biggest.Although the multilayer technique of advanced person can reduce overall dimensions, but cost is high, and the course of processing is complicated.In order to enter one
Step reduces the volume of wave filter, can be cut by resonator cavity along the magnetic wall of substrate integration wave-guide resonator cavity, such smaller volume
Wave filter based on half module, 1/4th moulds and 1/8th mould substrate integration wave-guides be suggested, and have humorous with full mould
Shake the similar electromagnetic property in chamber.
Summary of the invention:
The purpose of the present invention is to propose to a kind of slot-coupled and compensate 1/8th integrated ripples of mould substrate of fractal defect sturcture
Waveguide filter, has the various advantage of conventional substrate integral wave guide filter concurrently, reduces the size of wave filter further.
Technical scheme: a kind of slot-coupled compensates 1/8th mould substrate integration wave-guides of fractal defect sturcture
Wave filter, its feature includes: dielectric substrate and be arranged on metal patch and the metal throuth hole of dielectric substrate upper and lower surface, described
Metal patch includes input/output port microstrip line and standard 1/8th mould substrate with equilateral right angled triangle defect sturcture
Integrated waveguide the first resonator cavity, the second resonator cavity, the 3rd resonator cavity and the 4th resonator cavity；Described the first resonator cavity, second humorous
Shake chamber and the 3rd resonator cavity, the 4th resonator cavity about the groove center axle mirror image pair between the second resonator cavity and the 3rd resonator cavity
Claim；Described metal throuth hole runs through dielectric substrate and upper and lower surface metal patch；Utilize 1/8th mould substrate integration wave-guides, described
1/8th mould substrate integration wave-guides be along substrate integration wave-guide rectangular cavity diagonal magnetic wall and the center line magnetic of Ge Bian
Resonator cavity incision is obtained by wall, has two open borders；Crack 1/8th mould substrates of fractal defect of surface are integrated
Waveguide is to be parallel to 1/8th mould substrate integration wave-guides at the upper strata metal covering of resonator cavity by the hypotenuse of equilateral right angled triangle
The equilateral right angled triangle of the direction etching of hypotenuse.It is etched with compensating for coupling gap at the right-angle side that second and third resonator cavity is adjacent.
It is used as fundamental resonance unit by etching equilateral right angled triangle defect sturcture on 1/8th mould substrate integration wave-guides.
Electric coupling is realized by groove between described wave filter the first resonator cavity and the second resonator cavity.Second resonator cavity and
On the one hand electric coupling is realized by groove between three resonator cavitys, and by the right-angle side etching coupling adjacent at two resonator cavitys
Close and compensate gap to strengthen the electric coupling between two resonator cavitys.Realized by groove between 3rd resonator cavity and the 4th resonator cavity
Electric coupling.Realize magnetic coupling by perception window between first resonator cavity and the 4th resonator cavity, thus realize cross-couplings.First
The coupling of resonator cavity and the 4th resonator cavity makes wave filter create two transmission zeros, and stiffness of coupling is the biggest, and transmission zero is more leaned on
Nearly passband edge, selectivity is the best.Input/output port is directly that the microstrip line of 50 ohm is connected with two characteristic impedances.
The medicine have the advantages that and compare traditional four chamber coupling filters, slot-coupled compensates the eight of fractal defect sturcture
/ mono-mould substrate integral wave guide filter volume decreases 90%, by formation on 1/8th mould substrate integration wave-guides etc.
Limit right angled triangle defect sturcture is as fundamental resonance unit, and the surface current of resonator cavity can walk around the equilateral right angle trigonometry on surface
Shape defect, so extends equivalent current path, increases electrical length, so that resonant frequency reduces.By changing defect size, can
To obtain the resonator cavity of the different frequency in coupling matrix.Under identical resonant frequency, surface has equilateral right angled triangle to lack
The size of the resonator cavity fallen into can be less than the resonator cavity not having equilateral right angled triangle defect.Reduce the size in each chamber, from
And reduce the size of whole wave filter.Logical in-band insertion loss is better than-1.4dB, and in passband, return loss is better than-21dB,
Creating a transmission zero at 6.1GHz and 6.86GHz respectively, the frequency greatly improving lower stopband and upper stopband selects
Property.
Accompanying drawing explanation
Fig. 1 a is the planar structure schematic diagram of the single resonator cavity of the embodiment of the present invention.
Fig. 1 b is the cross section structure schematic diagram of the single resonator cavity of the embodiment of the present invention.
Fig. 2 is the structure distribution schematic diagram of the wave filter of the embodiment of the present invention.
Fig. 3 is the frequency response curve of the wave filter of the embodiment of the present invention.
In figure: fractal defect sturcture 1/4th mould substrate integration wave-guide resonator cavity upper surface metal patch 1, isosceles right angle
Triangle defect 2, metal throuth hole 3, dielectric substrate 4, lower surface metal paster 5, input port the 6, first resonator cavity 7, second are humorous
Shake chamber the 8, the 3rd resonator cavity the 9, the 3rd resonator cavity 10, output port 11, compensating for coupling gap 12.
Detailed description of the invention
Slot-coupled compensates 1/8th mould substrate integral wave guide filters of fractal defect sturcture, described wave filter bag
Include: dielectric substrate 4 and be arranged on metal patch 1,5 and metal throuth hole 3, the described metal throuth hole of dielectric substrate upper and lower surface
3 run through dielectric substrate 4 and upper and lower surface metal patch 1,5.It is illustrated in figure 1 single 1/8th mould substrate integration wave-guide resonance
Chamber, two open border is equivalent to preferable magnetic wall, and the resonant frequency of resonator cavity is mainly by the size of resonator cavity be etched in
The size of the defect sturcture on resonator cavity surface determines.By the upper strata metal at 1/8th mould substrate integration wave-guide resonator cavitys
The equilateral right angled triangle 2 etched is placed in the direction that surface 1 is parallel to resonator cavity hypotenuse by the hypotenuse of equilateral right angled triangle, lacks
Fall into the size of structure right angle length of side a for regulating the resonant frequency of resonator cavity.
The present invention is to open 1/8th mould substrate integration wave-guides of equilateral right angled triangle groove with four surfaces as shown in Figure 2
The cross-coupled filter of resonator cavity composition, described wave filter includes: input port 6, output port the 11, first resonator cavity 7, the
Two resonator cavity the 8, the 3rd resonator cavity the 9, the 4th resonator cavitys 10.Described first resonator cavity the 7, second resonator cavity 8 and the 3rd resonator cavity 9,
4th resonator cavity 10 is about the groove center axle specular between the second resonator cavity 8 and the 3rd resonator cavity 9, at the second resonator cavity
8 and the adjacent right-angle side of 9 two resonator cavitys of the 3rd resonator cavity be etched with compensating for coupling gap 12.First resonator cavity 7 and second is humorous
Shake and realize negative coupling by groove between chamber 8.On the one hand realized negative between second resonator cavity 8 and the 3rd resonator cavity 9 by groove
Coupling, and by the right-angle side etching compensating for coupling gap 12 adjacent at two resonator cavitys to strengthen between two resonator cavitys
Negative coupling.Negative coupling is realized by groove between 3rd resonator cavity 9 and the 4th resonator cavity 10.First resonator cavity 7 and the 4th is humorous
Shake and realize just coupling by perception window between chamber 10.The input port 6 of wave filter, output port 11 connect the first resonance respectively
Chamber 7 and the 4th resonator cavity 10.Input/output port 6,11 is directly that the microstrip line of 50 ohm is connected with two characteristic impedances.This
The mid frequency of bright wave filter depends on the resonant frequency of resonator cavity, and bandwidth is mainly affected by the coefficient of coup.Resonator cavity
Resonant frequency is mainly by the right-angle side of the hypotenuse of resonator cavity He the equilateral right angled triangle defect sturcture being etched in resonator cavity surface
Long determining, a2 is used for regulating first and the 4th resonant frequency of resonator cavity 7,10, and a1 is used for regulating second and the 3rd resonator cavity
8, the resonant frequency of 9.C2 regulate simultaneously the stiffness of coupling between the first resonator cavity 7 and the second resonator cavity 8 and the 3rd resonator cavity 9 with
Stiffness of coupling between 4th resonator cavity 10.C1 regulates the second resonator cavity and the stiffness of coupling of the 3rd resonator cavity.G and j is by adjusting
Save the size in compensating for coupling gap 12 on the second resonator cavity 8 and the 3rd resonator cavity 9 adjacent straight arm of angle to regulate between two cavitys
Stiffness of coupling, reach to strengthen the purpose of stiffness of coupling between two cavitys.Equally, e is humorous with the 4th for regulating the first resonator cavity 7
Shake the stiffness of coupling between chamber 10, determines the position of filter transfer zero point.Input port 6 and output port 11 are respectively with
One resonator cavity and the 4th resonator cavity are connected, and its characteristic impedance is 50 ohm.
In this example, the dielectric substrate relative dielectric constant of selection is 2.2, and thickness is 0.508mm；Such as geometry each in Fig. 2
Parameter is respectively as follows: w=1.59mm, d=0.5mm, p=0.9mm, a1=2.4mm, a2=5.5mm, c1=0.62mm, c2=
1.16mm, e=1.5mm, f1=10.75mm, f2=9.7mm, g=0.1mm, j=1.2mm, k=1.8mm, n=0.1mm.
Being illustrated in figure 3 the frequency response curve of the wave filter of the embodiment of the present invention, wherein dotted line is simulation result, solid line
For test result, from the figure, it can be seen that simulation result matches with test result, the filter centre frequency of the present invention is
6.4GHz, relative bandwidth is 8.5%, and logical in-band insertion loss is better than-1.4dB, and in passband, return loss is better than-21dB,
6.1GHz and 6.86GHz occurs in that a transmission zero respectively, greatly improves lower stopband and the frequency selectivity of upper stopband.
The present invention is 1/8th mould substrate integral wave guide filters that a kind of slot-coupled compensates fractal defect sturcture, should
In wave filter, 1/8th mould resonators reduce about compared to the size of traditional substrate integration wave-guide resonant cavity filter
87.5%.Extend equivalent current path by introducing equilateral right angled triangle defect, increase electrical length, so that resonant frequency fall
Low.By changing defect size, the resonator cavity of different frequency can be obtained.Comparing traditional four chamber coupling filters, gap couples
Compensate fractal defect sturcture standard 1/8th mould substrate integration wave-guide band filter volume and decrease 90%.Filter passband two
Respectively there is a transmission zero in side, has preferable frequency selectivity, the most also has compact conformation, stable performance, it is easy to collection
The features such as one-tenth.
The present invention is not done any pro forma restriction by embodiment described above, any according to foregoing invention scheme skill
Any change to making in embodiment shape or structure of the content of art, within belonging to protection scope of the present invention.
Claims (2)
1. 1/8th mould substrate integral wave guide filters of the slot-coupled fractal defect sturcture of compensation, it is characterised in that:
By etching equilateral right angled triangle defect sturcture on 1/8th mould substrate integration wave-guides as this filter of fundamental resonance unit
Ripple device includes: input port (6), output port (11), the first resonator cavity (7), the second resonator cavity (8), the 3rd resonator cavity (9),
4th resonator cavity (10)；Described first resonator cavity (7), the second resonator cavity (8) and the 3rd resonator cavity (9), the 4th resonator cavity (10)
About the groove center axle specular between the second resonator cavity (8) and the 3rd resonator cavity (9)；At the second resonator cavity (8) and
Three resonator cavity (9) two right-angle sides that resonator cavity is adjacent etching compensating for coupling gap (12), the first resonator cavity (7) and the second resonance
Negative coupling is realized by groove between chamber (8), on the one hand real by groove between the second resonator cavity (8) and the 3rd resonator cavity (9)
Now negative coupling, and by right-angle side etching compensating for coupling gap (12) enhancing two resonator cavitys adjacent at two resonator cavitys
Between negative coupling；Negative coupling is realized by groove between 3rd resonator cavity (9) and the 4th resonator cavity (10)；First resonator cavity
(7) and realize just coupling by perception window between the 4th resonator cavity (10)；The input port (6) of wave filter, output port
(11) the first resonator cavity (7) and the 4th resonator cavity (10) are connected respectively；Input/output port (6,11) directly hinders with two features
Resist be 50 ohm microstrip line connect.
Slot-coupled the most according to claim 1 compensates 1/8th mould substrate integration wave-guide filtering of fractal defect sturcture
Device, it is characterised in that: this wave filter is by four equilateral right angled triangle defect sturcture 1/8th mould substrate integration wave-guide resonance
Chamber is constituted, and single resonator cavity utilizes 1/8th mould substrate integration wave-guides, and on metal surface, (1) presses equilateral right angle trigonometry thereon
The hypotenuse of shape is parallel to the direction of 1/8th mould substrate integration wave-guide hypotenuses and etches equilateral right angled triangle defect (2)；Described
Resonator cavity includes: dielectric substrate (4) and be arranged on the metal patch (1) of dielectric substrate upper surface, the metal patch of lower surface
(5) and metal throuth hole (3), described metal throuth hole (3) runs through dielectric substrate (4) and upper and lower surface metal patch (1,5)；?
Two resonator cavitys (8) and (9) two right-angle sides that resonator cavity is adjacent etching compensating for coupling gap (12) of the 3rd resonator cavity.
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Cited By (9)
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| CN106450611A (en) * | 2016-11-11 | 2017-02-22 | 南京理工大学 | High-frequency selectivity balance band-pass filter based on substrate integrated waveguide |
| CN106571508A (en) * | 2016-11-11 | 2017-04-19 | 南京理工大学 | Fourth-mode and eighth-mode substrate integrated waveguide-based balanced band-pass filter |
| CN107196069A (en) * | 2017-04-21 | 2017-09-22 | 南京邮电大学 | Compact substrate integrated waveguide back cavity slot antenna |
| CN110071352A (en) * | 2019-04-29 | 2019-07-30 | 中国科学技术大学 | Full magnetic wall triangle filter |
| CN110911789A (en) * | 2019-11-18 | 2020-03-24 | 电子科技大学 | Substrate integrated waveguide band-pass filter |
| CN111883887A (en) * | 2020-07-13 | 2020-11-03 | 南京理工大学 | High-selectivity balanced filter based on ceramic dielectric loading |
| CN112858220A (en) * | 2021-01-11 | 2021-05-28 | 北京邮电大学 | Multi-Fano resonance nano refractive index sensor based on toothed right-angled triangular resonant cavity |
| CN112952326A (en) * | 2021-03-05 | 2021-06-11 | 电子科技大学 | Spherical cavity waveguide band-pass filter of 3D printing X-waveband CT structure and manufacturing method |
| CN114069175A (en) * | 2021-10-12 | 2022-02-18 | 杭州电子科技大学 | HMSIW multi-passband band-pass filter based on odd-even mode analysis |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450611A (en) * | 2016-11-11 | 2017-02-22 | 南京理工大学 | High-frequency selectivity balance band-pass filter based on substrate integrated waveguide |
| CN106571508A (en) * | 2016-11-11 | 2017-04-19 | 南京理工大学 | Fourth-mode and eighth-mode substrate integrated waveguide-based balanced band-pass filter |
| CN106450611B (en) * | 2016-11-11 | 2019-02-22 | 南京理工大学 | High-frequency based on substrate integration wave-guide selectively balance bandpass filter |
| CN106571508B (en) * | 2016-11-11 | 2019-04-16 | 南京理工大学 | Based on a quarter and 1/8th mould substrate integrated waveguide balance bandpass filters |
| CN107196069A (en) * | 2017-04-21 | 2017-09-22 | 南京邮电大学 | Compact substrate integrated waveguide back cavity slot antenna |
| CN110071352A (en) * | 2019-04-29 | 2019-07-30 | 中国科学技术大学 | Full magnetic wall triangle filter |
| CN110911789A (en) * | 2019-11-18 | 2020-03-24 | 电子科技大学 | Substrate integrated waveguide band-pass filter |
| CN111883887A (en) * | 2020-07-13 | 2020-11-03 | 南京理工大学 | High-selectivity balanced filter based on ceramic dielectric loading |
| CN112858220A (en) * | 2021-01-11 | 2021-05-28 | 北京邮电大学 | Multi-Fano resonance nano refractive index sensor based on toothed right-angled triangular resonant cavity |
| CN112952326A (en) * | 2021-03-05 | 2021-06-11 | 电子科技大学 | Spherical cavity waveguide band-pass filter of 3D printing X-waveband CT structure and manufacturing method |
| CN114069175A (en) * | 2021-10-12 | 2022-02-18 | 杭州电子科技大学 | HMSIW multi-passband band-pass filter based on odd-even mode analysis |
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Application publication date: 20161109 |