CN110112522A - A kind of high Q dual mode filter of stack based on gap waveguide technology - Google Patents
A kind of high Q dual mode filter of stack based on gap waveguide technology Download PDFInfo
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- CN110112522A CN110112522A CN201910465885.5A CN201910465885A CN110112522A CN 110112522 A CN110112522 A CN 110112522A CN 201910465885 A CN201910465885 A CN 201910465885A CN 110112522 A CN110112522 A CN 110112522A
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- 238000005516 engineering process Methods 0.000 title claims abstract description 26
- 230000009977 dual effect Effects 0.000 title claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 83
- 239000002184 metal Substances 0.000 claims abstract description 83
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- 238000001465 metallisation Methods 0.000 claims abstract description 4
- 230000008878 coupling Effects 0.000 claims description 19
- 238000010168 coupling process Methods 0.000 claims description 19
- 238000005859 coupling reaction Methods 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 16
- 230000005540 biological transmission Effects 0.000 description 8
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- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 210000003361 heart septum Anatomy 0.000 description 1
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- 239000000758 substrate Substances 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
Classifications
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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
- H01P1/2082—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with multimode resonators
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Abstract
A kind of high Q dual mode filter of stack based on gap waveguide technology, including underlying metal plate, metallic intermediate layer plate and the top-level metallic plate that stacked on top is fixed, fixed waveguide flange on underlying metal plate and top-level metallic plate；It is respectively provided with the more metal upright posts around setting on underlying metal plate and metallic intermediate layer plate, forms a resonant cavity around the metal upright post of setting and the metal layer on its upper layer；There is the air gap between metal upright post and upper metallization layer on every layer；Having on metallic intermediate layer plate makes upper and lower resonant cavity can be realized cracking for couple electromagnetic energy；Underlying metal plate and top-level metallic plate are provided with elongated slot, have aperture corresponding with elongated slot on waveguide flange.The present invention is minimized by the dual-mode design of stack so that filter is realized；It is realized using gap waveguide technology, air, Q-unloaded with higher is filled in resonant cavity.
Description
Technical field
The invention belongs to microwave technical fields, are related to a kind of wave guide resonance cavity filter, and in particular to one kind is based on gap
The high Q bimodulus microwave filter of the stack of guide technology.
Background technique
Due to the requirement of communication system frequency spectrum growing tension and High Data Rate, the frequency of communication system constantly expands to high frequency
Exhibition, as communication system frequency expands to millimeter wave, and frequency range is more and more, and communication system becomes increasingly complex, low-loss, it is low at
Originally, the performances such as miniaturization become the inevitable requirement to millimetric wave device.The design of bimodulus or multi-mode filter is with identical volume
It realizes more high filter orders, obtains better filtering performance, therefore, bimodulus or multimodes design are to the miniaturization of filter and low
Cost is of great significance.But in multi-mode filter design, due between mode between the control of multimode intracavity modal and chamber
Coupling is more complicated, and multi-mode is more sensitive to filter construction, thus brings to the design of multi-mode filter
It is difficult.
In millimeter wave frequency band, microstrip line construction is since radiation loss and dielectric loss are big, power capacity is low, effect of dispersion is tight
Weight, is unsuitable for the application of millimeter wave frequency band；Substrate integration wave-guide equally has the shortcomings that dielectric loss is big, and manufacturing process is more multiple
It is miscellaneous；Rectangular waveguide is since traditional hollow rectangular waveguide is usually made and is linked together of two parts, and two kinds of metal structures
Usually there are problems that poor electric contact causes energy leakage, quality factor to reduce, while there is also narrower bandwidths for rectangular waveguide
Be difficult to integrated problem.
In recent years, gap waveguide technology causes common concern.The technology solves the energy of traditional rectangular waveguide filter
The problem of amount is via gap leakage, and the factors such as Metal Surface Roughness and metal oxidation are to the product of slot-waveguide configuration filter
Prime factor influences smaller.The technology solves the problems, such as the application of traditional rectangular waveguide filter well.With traditional shape
The transmission line of formula is compared, and gap waveguide also has that transmission loss is low, working band is wide, integrated level is high, without encapsulating, can inhibit table
Surface wave has many advantages, such as high-isolation.Due to the structure and performance characteristics of gap waveguide, so that it is logical in high bands such as millimeter waves
It is with a wide range of applications in letter system and huge commercial value.Gap waveguide is expected to become the following millimetre-wave attenuator very much
One of important application scheme of system.
The patent of CN105762447 gives a kind of double frequency difference filter, which is similarly stacking
The filter of setting, but the patent is really a kind of double frequency filter of existing common SIW structure, the filtering of SIW structure
Device can introduce dielectric loss, can not be applied to millimeter wave or higher frequency section；And the patent is parallel for realizing cracking for coupling
In the cornerwise design of resonant cavity, the adjustment of the coefficient of coup can not be flexibly carried out, while the patent can not achieve in multimode cavity
The flexible control of Mode Coupling between mode and chamber, design is complicated, so that such mode filter is difficult to be used widely.
Summary of the invention
(1) present invention solves the technical problem that
The purpose of the present invention is to solve the shortcomings of the prior art place, proposes that a kind of stack based on gap waveguide technology is high
Q bimodulus microwave filter, the filter are based on gap waveguide technology Q value with higher, realize miniaturization, heap using bimodulus
The design of stacked is so that more compact structure, can be achieved intracavitary excited modes relative to resonant cavity long side rotation angle degree by bottom feedback fluting
Formula control, is easy to implement the target topology mechanism of filter, simplifies design, and pass through the spirit to being electrically coupled with magnetic coupling component
It is living to control and then realize that introducing a pair of transmission zero that flexibly control in passband two sides makes the filter have selectivity strong
The advantages of.
(2) the technical solution adopted by the present invention
The high Q dual mode filter of a kind of stack based on gap waveguide technology, including in the fixed underlying metal plate of stacked on top
Fixed waveguide flange on interbed metal plate and top-level metallic plate, underlying metal plate and top-level metallic plate；
The more metal upright posts around setting are respectively provided on underlying metal plate and metallic intermediate layer plate, around the metal upright post of setting
A resonant cavity is formed with the metal layer on its upper layer；
There is the air gap between metal upright post and upper metallization layer on every layer；
Having on metallic intermediate layer plate makes upper and lower resonant cavity can be realized cracking for couple electromagnetic energy；
Underlying metal plate and top-level metallic plate are provided with elongated slot, have aperture corresponding with elongated slot on waveguide flange.
For metal upright post around rectangular cavity is formed, the long side and bond length of resonant cavity are different.
The long side of the elongated slot and rectangular cavity of underlying metal plate and top-level metallic plate has default angle, the default folder
Angular region absolute value is 0 ° ~ 90 °, when angular range absolute value is 0 °, motivates TE201 mode, angular range absolute value is 90 °
When, motivate TE102 mode.
The diagonal setting perturbation metal upright post of the rectangular cavity.
Aperture on the waveguide flange is chamfering.
The top of the underlying metal plate and the lower part of metallic intermediate layer plate, the top of metallic intermediate layer plate and top-level metallic
The lower part of plate is that concave-convex type carves conjunction structure, and carves and be bolted at conjunction.
The underlying metal plate, metallic intermediate layer plate and top-level metallic plate are metallic aluminium or metallic copper.
The metal upright post is cuboid, and has set distance between adjacent metal column.
Be electrically coupled component by adjusting the length adjustment cracked, by adjusting crack relative to resonant cavity center offset and its
Width adjustment magnetic coupling component.
(3) beneficial effects of the present invention
(1) present invention is minimized by the dual-mode design of stack so that filter is realized；
(2) it is realized using gap waveguide technology, filling air in resonant cavity, Q-unloaded with higher, such as can be high
Up to 4500.
(2) it, when fluting is parallel to resonant cavity short side, is only motivated using waveguide flange from bottom side and top side fluting feed
TE102 mode, when slot be parallel to resonant cavity long side when, only motivated TE201 mode；Therefore according to fluting and resonant cavity two
The angle on side can motivate different mode, realize the flexible control of double mode；
(3) metallic intermediate layer plate, which cracks, realizes electromagnetism hybrid coupled, and electromagnetism hybrid coupled provides quadrature in phase for energy coupling
Two paths so that the filter has the advantages that more strong selectivity, stitched to introduce pair of transmission zeros in passband two sides
The length of gap determines piezoelectric coupling strength, and gap determines coupling strength to the offset at resonant cavity center and its width, electromagnetism
The flexible control of stiffness of coupling is but also transmission zero location also realizes flexible control.
Detailed description of the invention
Fig. 1 is overall structure schematic three dimensional views of the invention.
Fig. 2 is overall structure top view of the invention.
Fig. 3 is the schematic three dimensional views of the invention without top layer metallic layer 3.
Fig. 4 is the top view of metallic intermediate layer layer 2 of the present invention.
Fig. 5 is the top view of bottom metal layer 1 of the present invention.
Fig. 6 is the simulation result of return loss of the present invention and insertion loss.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and detailed description.
Referring to Fig. 1 ~ 5, the present invention provides a kind of high Q dual mode filter of the stack based on gap waveguide technology, the bimodulus
Filter includes underlying metal plate 1, metallic intermediate layer plate 2 and top-level metallic plate 3, the setting of three-ply metal stacked on top, and phase
There is gap, the more metal upright posts 9 to form resonant cavity are arranged in inner space between adjacent metal layer.The filter is different from existing
SIW filter, the filter utilize gap waveguide technology, no dielectric loss, have high Q performance, can be applied to millimeter wave
Or better frequency range.
As shown in figure 3, metal upright post 9 is fixed on underlying metal plate 1 and metallic intermediate layer plate 2, on each metal plate
More metal upright posts 9 are disposed adjacent, and two neighbouring rectangular cavities are formed, between having between adjacent metal upright post
Gap.
As shown in figure 3, the metal upright post 9 on bottom metal layer 1 and metallic intermediate layer layer 2 and having between upper metallization layer
The air gap 8, metal upright post 9, the air gap 8 and upper layer and lower layer metal plate constitute electromagnetic bandgap structure.
11 are cracked as shown in figure 4, being provided on metallic intermediate layer plate 2, and 11 connections of cracking resonant cavity up and down can be realized up and down
The couple electromagnetic energy of resonant cavity.The mode of energy coupling is hybrid coupled between two resonant cavities, passes through metallic intermediate layer plate
It cracks and realizes energy coupling.
Cracking 11 may be selected to be rectangle and cracks, wherein by adjusting crack 11 relative to resonant cavity off-centring and its
Width adjusts magnetic coupling component, and by adjusting cracking, 11 length adjustment is electrically coupled component, i.e., the present invention design when can be flexible
Control the coefficient of coup.When above-mentioned adjustment, it is adjusted and tests in design as needed.
The lower part fixed standard waveguide flange 4.2 of underlying metal plate 1, the top of top-level metallic plate 3 is fixed with standard waveguide
Flange 4.1, underlying metal plate 1 and top-level metallic plate 3 are provided with elongated slot, have aperture 5.1 corresponding with elongated slot on waveguide flange,
The aperture of the preferred chamfering of aperture, the setting of waveguide flange can be presented from bottom and top using standard waveguide flange respectively
Electricity.
The long side of above-mentioned rectangular cavity is different with the length of broadside.Elongated slot on underlying metal plate 1 and top-level metallic plate 3
There is the default angle being previously set with the long side of rectangular cavity, which is 0 ° ~ 90 °, works as folder
When angular region absolute value is 0 °, i.e., elongated slot is parallel with the long side of resonant cavity, motivates TE201 mode, and angular range absolute value is 90 °
When, i.e., elongated slot is parallel with the short side of resonant cavity, motivates TE102 mode；That is, elongated slot is revolved around resonant cavity center from 0-90 degree
When turning, TE102 mode component is gradually reduced in resonant cavity, and TE201 mode gradually increases, to realize the flexible control of double mode
System, according to mode requirement, selects suitable angle in design.
The diagonal setting perturbation metal upright post 10 of rectangular cavity, the perturbation metal upright post 10 of filter of the present invention can divide
From two polarization degenerate modes TE102 and TE201.
Three-ply metal of the invention in connection, the lower part of the top of underlying metal plate 1 and metallic intermediate layer plate 2, in
The top of interbed metal plate 2 and the lower part of top-level metallic plate 2 are that concave-convex type carves conjunction structure, and carves and be bolted at conjunction.
As shown in Figure 1, underlying metal plate 1 and 2 four jiaos of metallic intermediate layer plate upside have a concave-shaped structure, the structure respectively with middle layer
Convex shape structure on the downside of metal plate 2 and 3 four jiaos of top-level metallic plate carves conjunction, and reserved M3 screw hole 7, is used as metallic intermediate layer plate 2
With the support and positioning of top-level metallic plate 3.
In embodiment as shown in Figure 1, underlying metal plate 1, metallic intermediate layer plate 2 and the top-level metallic plate 3 of filter
It is cuboid, 4 concave shape pillars, metallic intermediate layer plate 2 is arranged in 2 four jiaos of upsides of underlying metal plate 1 and metallic intermediate layer plate
4 convex shape pillars are set with 3 four jiaos of downsides of top-level metallic plate, the two carves conjunction and is used to support and positions, and three-ply metal four
The screw hole 7 of 4 M3 is reserved for reinforcing in angle.
Underlying metal plate 1, metallic intermediate layer plate 2 and the preferred metallic aluminium of top-level metallic plate 3 or metallic copper of aforementioned present invention.
As an embodiment of the present invention, the underlying metal plate 1 of above-mentioned filter, metallic intermediate layer plate 2 and top layer gold
Belonging to the cuboid that plate 3 is thickness 2mm, 4 concave shape pillars are arranged in 2 four jiaos of upsides of underlying metal plate 1 and metallic intermediate layer plate,
The section of four concave shape pillars is the square of 5mm × 10mm, is highly 3.5mm, and four concave shape pillar center difference
There are four the screw holes 7 that diameter is 3mm.
4 convex shape pillars are arranged in 3 four jiaos of downsides of metallic intermediate layer plate 2 and top-level metallic plate, and the two is carved conjunction and is used to support
And positioning, and the screw hole 7 of 4 M3 is reserved for reinforcing in three-ply metal quadrangle.The section of four convex shape pillars is 5mm
The square of × 5mm is highly 2mm, and there are four the screw holes 7 that diameter is 3mm respectively at four convex shape pillar centers.
Metal upright post 9 is generally the cuboid that the high section 3mm is 1mm × 1mm, and interval is generally 1mm between metal column.
The height of air gap 8 is 0.5mm.
The width of two resonant cavities is 11.35mm, and length is 11.8mm.
Crack 11 be 0.7mm × 9mm rectangular slot, and the slit centers from heart septum in chamber be 4.3mm, pass through tune
The intensity that electromagnetic coupling is adjusted in the width in gap, length and off-centered distance is saved, and gap is longer is electrically coupled bigger, seam
Gap deviation chamber center spacing is smaller, and width is about big, and magnetic coupling is bigger.
Resonant cavity it is diagonal on distance of two perturbation metal upright posts 10 away from two chamber sides that introduces respectively be respectively 0.8mm and
0.6mm, the metal upright post section are 0.8mm × 0.7mm.
Reserve the screw hole 6 of M3 in the standard waveguide flange quadrangle of filter upper and lower part；Underlying metal plate and top-level metallic
Elongated slot on plate is slotted having a size of 7.12mm × 1.2mm × 2mm cuboid, and standard waveguide method is slotted on the outside of metal plate
Two long sides make the chamfering that 45 degree of radiuses are 1.178mm, to constitute the progressive matching of standard waveguide.
The high Q bimodulus microwave filter of stack based on gap waveguide technology of the invention, is utilized in realization principle
The electromagnetic bandgap structure of gap waveguide technology, metal upright post 9, air gap 8 and upper and lower metal plate constitute electromagnetic bandgap structure, when
Frequency is in the stopband of electro-magnetic bandgap (the air gap is less than quarter-wave), and electromagnetic wave cannot be propagated, and the electromagnetism is utilized
The stopband of bandgap structure designs filter, can make filter quality factor with higher, such as can reach 4500.
The filter separates TE102 and TE201 two polarization by introducing perturbed structure metal upright post 10 in resonant cavity
Degenerate mode, and using the miniaturization of bimodulus characteristic realization filter, and the design of three level stack formula is so that structure is more compact.
The present invention is using standard waveguide flange from bottom side and top side fluting feed, and when slotting 5.1, to be parallel to resonant cavity short
Bian Shi has only motivated TE102 mode, when slot be parallel to resonant cavity long side when, only motivated TE201 mode, slot around
Resonant cavity center is rotated from 0-90 degree, and TE102 mode component is gradually reduced in resonant cavity, and TE201 mode gradually increases, thus real
The flexible control of existing double mode.When design, it can be made to obtain suitable mode previously according to set angle angle value is needed.
As shown in Figure 3 and Figure 4, the 11 realization electromagnetism hybrid coupleds of cracking of metallic intermediate layer plate 2, electromagnetism hybrid coupled are energy
Amount coupling provides two paths of quadrature in phase, so that introducing pair of transmission zeros in passband two sides makes the filtering utensil
Have the advantages of more strong selectivity, crack 11 length determine piezoelectric coupling strength, and the offset at 11 pairs of resonant cavity centers of cracking and its
Width determines coupling strength, and the flexible control of electromagnetic coupling strengths is but also transmission zero location also realizes flexible control.
As shown in figure 5, being the high Q bimodulus microwave filter return loss of the stack of the invention based on gap waveguide technology
With the simulation result of insertion loss, which is 30.077GHz, pass band width 854MHz, in passband
Return loss is less than -20dB, and leading to in-band insertion loss is 0.2dB, and passband or so respectively has a transmission zero, so that the filter
With stronger selectivity.
In the description of this specification, particular features, structures, materials, or characteristics can be real in any one or more
Applying can be combined in any suitable manner in example or example.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those skilled in the art the invention discloses in the range of, the variation or replacement that can be readily occurred in should all be covered
Within the scope of the present invention.
Claims (9)
1. a kind of high Q dual mode filter of stack based on gap waveguide technology, it is characterised in that: fixed including stacked on top
On underlying metal plate (1), metallic intermediate layer plate (2) and top-level metallic plate (3), underlying metal plate (1) and top-level metallic plate (3)
Fixed waveguide flange；
The more metal upright posts (9) around setting are respectively provided on underlying metal plate (1) and metallic intermediate layer plate (2), around setting
Metal upright post (9) and its upper layer metal layer formed a resonant cavity；
Metal upright post (9) on every layer and between upper metallization layer have the air gap (8)；
There are crack (11) for making upper and lower resonant cavity can be realized couple electromagnetic energy on metallic intermediate layer plate (2)；
Underlying metal plate (1) and top-level metallic plate (3) are provided with elongated slot, have aperture corresponding with elongated slot on waveguide flange.
2. the high Q dual mode filter of a kind of stack based on gap waveguide technology according to claim 1, feature exist
In:
For metal upright post (9) around rectangular cavity is formed, the long side and bond length of resonant cavity are different.
3. the high Q dual mode filter of a kind of stack based on gap waveguide technology according to claim 1, feature exist
In:
The long side of the elongated slot and rectangular cavity of underlying metal plate (1) and top-level metallic plate (3) has default angle, described default
Angular range absolute value is 0 ° ~ 90 °, when angular range absolute value is 0 °, motivates TE201 mode, angular range absolute value is
At 90 °, TE102 mode is motivated.
4. the high Q dual mode filter of a kind of stack based on gap waveguide technology according to claim 2, feature exist
In:
The diagonal setting perturbation metal upright post (10) of the rectangular cavity.
5. the high Q dual mode filter of a kind of stack based on gap waveguide technology according to claim 1, feature exist
In:
Aperture on the waveguide flange is chamfering.
6. the high Q dual mode filter of a kind of stack based on gap waveguide technology according to claim 1, feature exist
In:
The top and top on the top of the underlying metal plate (1) and the lower part of metallic intermediate layer plate (2), metallic intermediate layer plate (2)
The lower part of layer metal plate (2) is that concave-convex type carves conjunction structure, and carves and be bolted at conjunction.
7. the high Q dual mode filter of a kind of stack based on gap waveguide technology according to claim 1, feature exist
In:
The underlying metal plate (1), metallic intermediate layer plate (2) and top-level metallic plate (3) are metallic aluminium or metallic copper.
8. the high Q dual mode filter of a kind of stack based on gap waveguide technology according to claim 1, feature exist
In:
The metal upright post (9) is cuboid, and has set distance between adjacent metal column (9).
9. the high Q dual mode filter of a kind of stack based on gap waveguide technology according to claim 1, feature exist
In:
By adjusting cracking, the length adjustment of (11) is electrically coupled component, by adjusting the offset of (11) relative to resonant cavity center of cracking
And its width adjustment magnetic coupling component.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110690544A (en) * | 2019-09-30 | 2020-01-14 | 西安交通大学 | high-Q dual-mode dual-band filter with flexibly controllable working frequency band and bandwidth |
| CN112469258A (en) * | 2020-10-28 | 2021-03-09 | 西安电子科技大学 | Double-gap electromagnetic shielding system, design method thereof and microwave circuit |
| CN112688041A (en) * | 2020-12-17 | 2021-04-20 | 江苏亨通太赫兹技术有限公司 | Multipath cross-coupling millimeter wave filter |
| CN113097722A (en) * | 2021-03-09 | 2021-07-09 | 北京邮电大学 | Common-caliber double-frequency transmission line capable of working in microwave/millimeter wave frequency band |
| CN115275622A (en) * | 2022-09-30 | 2022-11-01 | 盛纬伦(深圳)通信技术有限公司 | Slotted gap waveguide antenna and preparation method thereof |
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| CN110690544A (en) * | 2019-09-30 | 2020-01-14 | 西安交通大学 | high-Q dual-mode dual-band filter with flexibly controllable working frequency band and bandwidth |
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