CN105609905B - A kind of list notch filter and electronic equipment - Google Patents
A kind of list notch filter and electronic equipment Download PDFInfo
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- CN105609905B CN105609905B CN201511025136.9A CN201511025136A CN105609905B CN 105609905 B CN105609905 B CN 105609905B CN 201511025136 A CN201511025136 A CN 201511025136A CN 105609905 B CN105609905 B CN 105609905B
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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
- H01P1/2002—Dielectric waveguide filters
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Abstract
The present invention provides a kind of single notch filters, including：Dielectric layer；It is set to the first metal layer and second metal layer of two opposite faces of dielectric layer, the first metal layer includes metal micro-strip patch, second metal layer includes co-planar waveguide plate and metal ground plate, is based on dielectric layer, point shape defect of co-planar waveguide plate body be coupled with metal micro-strip patch.Due to being provided with comprising point shape defect body in second metal layer, and this body is coupled with the first metal layer metal micro-strip patch based on the dielectric layer with dividing shape defect, since filter using micro-strip and defect realize by form, based on the space filling of fractal structure, spatial character is converted into electromagnetic property, the cascade mode of multiple filters need not be used, also achieve filter trap, and the volume due to dividing shape defect geotexture to be much smaller than multiple cascading filters, reduce the volume of filter, solve the mismatch problems between component, improve the efficiency of system.
Description
Technical field
The present invention relates to electronic device fields, and more specifically, it relates to a kind of single notch filter and electronic equipments.
Background technology
With the rapid development of communication technology, requirement of the people to the information transmission system is higher and higher.Under this background,
UWB (Ultra Wideband, ultra wide band) technologies are fast, safe with its simple system, at low cost, small power consumption, data transmission bauds
The advantages that property is high as the current communications field a research hotspot.
Since ultra-wideband communications occupied frequency band is too wide (3.1GHz to 10.6GHz), had existed in this frequency range
Conventional communication, such as：Such as it is used for the C-band and X-band of satellite communication, WLAN (Wireless Local Area
Networks, WLAN) and WiMAX (Worldwide Interoperability for Microwave Access,
Worldwide interoperability for microwave accesses or the access of broadband intercommunication microwave).How to solve co-channel interference and studies important content as UWB, and
Ultra-wide band filter with trap becomes design key.But the traditional design method of the UWB filter traps is more
The cascade of a filter, the filter increase system bulk and design cost, while easily causing the mismatch between component, reduce system
The efficiency of system.
Invention content
In view of this, the present invention provides a kind of single notch filter, solve multiple filter cascades in the prior art
The UWB filter trap structures of composition, cause filter system volume and design cost larger, and easily cause the mistake between component
The problem of matching, reducing the efficiency of system.
To achieve the above object, the present invention provides the following technical solutions：
A kind of list notch filter, including：
Dielectric layer；
It is set to the first metal layer in the first face of the dielectric layer；
It is set to the second metal layer in the second face of the dielectric layer, first face is opposite with second face；
Wherein, the first metal layer includes metal micro-strip patch, and the second metal layer includes co-planar waveguide plate and gold
Belong to earth plate, the co-planar waveguide plate includes with dividing shape defect body；Based on the dielectric layer, with the dividing shape defect body with it is described
Metal micro-strip patch is coupled.
Above-mentioned single notch filter, it is preferred that the metal micro-strip patch includes about in the first metal layer
Symmetrically arranged first patch of heart line and the second patch；
Described first component one end connects the first edge of the first metal layer, the first component other end with it is described
Second component one end is connected, the other end of the second component about the first metal layer center line and the second patch second
Component is symmetrical；One section of the first component of second patch is connected with the second component of second patch, and the other end connects institute
State the second edge of the first metal layer, the first edge and center line pair of the second edge about the first metal layer
Claim.
Above-mentioned single notch filter, it is preferred that the co-planar waveguide plate uses step impedance resonator.
Above-mentioned single notch filter, it is preferred that the metal ground plate surrounds the co-planar waveguide plate, and the metal
Earth plate is not connected to the co-planar waveguide plate.
Above-mentioned single notch filter, it is preferred that described point of shape defect body be set to the center of the co-planar waveguide plate.
Above-mentioned single notch filter, it is preferred that the co-planar waveguide plate uses rectangular structure, the co-planar waveguide plate
Include the first part for being arranged in order and being connected according to long side, second part and Part III, wherein first part and third portion
Split-phase is same, and the length of the broadside of the first part is less than the length of the broadside of the second part.
Above-mentioned single notch filter, it is preferred that throwing of the first part of the co-planar waveguide plate about the dielectric layer
Shadow is overlapped with the second component of the first patch in the metal micro-strip patch；The Part III of the co-planar waveguide plate is about institute
The projection for stating dielectric layer is overlapped with the second component of the second patch in the metal micro-strip patch.
Above-mentioned single notch filter, it is preferred that with the dividing shape defect body uses Y type fractal structures.
Above-mentioned single notch filter, it is preferred that the Y types fractal structure carries out N ranks using X-Y scheme fractal model
Divide shape, wherein the N values are the positive integer more than 1.
Above-mentioned single notch filter, it is preferred that the relative dielectric constant interval of the dielectric layer is 1-100, thick
Degree interval is 0.05-5mm.
A kind of electronic equipment, including single notch filter；
Wherein, single notch filter, including：
Dielectric layer；
It is set to the first metal layer in the first face of the dielectric layer；
It is set to the second metal layer in the second face of the dielectric layer, first face is opposite with second face；
Wherein, the first metal layer includes metal micro-strip patch, and the second metal layer includes co-planar waveguide plate and gold
Belong to earth plate, the co-planar waveguide plate includes with dividing shape defect body；Based on the dielectric layer, with the dividing shape defect body with it is described
Metal micro-strip patch is coupled.
It can be seen via above technical scheme that compared with prior art, the present invention provides a kind of single notch filter, packets
It includes：Dielectric layer；It is set to the first metal layer in the first face of the dielectric layer；It is set to second metal in the second face of the dielectric layer
Layer, first face are opposite with second face；Wherein, the first metal layer includes metal micro-strip patch, second gold medal
It includes co-planar waveguide plate and metal ground plate to belong to layer, and the co-planar waveguide plate includes with dividing shape defect body；Based on the dielectric layer,
Described point of shape defect body be coupled with the metal micro-strip patch.In a kind of single notch filter provided by the invention, due to
It is respectively arranged with the first metal layer and second metal layer in dielectric layer both sides, and is provided in the second metal layer and is lacked comprising point shape
Fall into ground body, and this body is coupled with the first metal layer metal micro-strip patch based on the dielectric layer with dividing shape defect, since filter is adopted
With micro-strip and defect form is realized, based on the space filling of fractal structure, spatial character is converted to electromagnetic property, it is not necessary to
Using the cascade mode of multiple filters, filter trap is also achieved, and since a point shape defect geotexture is much smaller than
The volume of multiple cascading filters reduces the volume of filter, solves the mismatch problems between component, improves the effect of system
Rate.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is an a kind of structural schematic diagram of single notch filter embodiment provided by the invention；
Fig. 2 is the concrete structure schematic diagram of the first metal layer in a kind of single notch filter embodiment provided by the invention；
Fig. 3 is the concrete structure schematic diagram of second metal layer in a kind of single notch filter embodiment provided by the invention；
Fig. 4 is the concrete structure schematic diagram of co-planar waveguide plate in a kind of single notch filter embodiment provided by the invention；
Fig. 5 (a) is that the single order parting of body lacks with dividing shape defect in a kind of single notch filter embodiment provided by the invention
Fall into structural schematic diagram；
Fig. 5 (b) is that the second order parting of body lacks with dividing shape defect in a kind of single notch filter embodiment provided by the invention
Fall into structural schematic diagram；
Fig. 5 (c) is with dividing shape defect second order after the improvement of body in a kind of single notch filter embodiment provided by the invention
Parting defect sturcture schematic diagram；
Fig. 6 is to have second order parting defect sturcture after improvement in a kind of single notch filter embodiment provided by the invention
The concrete structure schematic diagram of second metal layer；
Fig. 7 is a kind of another structural schematic diagram of single notch filter embodiment provided by the invention；
Fig. 8 is the structural schematic diagram of a kind of electronic equipment embodiment provided by the invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Attached drawing 1 is please referred to, for an a kind of structural schematic diagram of single notch filter embodiment provided by the invention, this singly falls into
Wave filter includes：Dielectric layer 100, the first metal layer 200 and second metal layer 300；
Wherein, which is set to the first face of the dielectric layer 100；Second metal layer 300 is set to institute
The second face of dielectric layer 100 is stated, first face is opposite with second face；
Wherein, the first metal layer 200 includes metal micro-strip patch 210, and the second metal layer 300 includes coplanar wave
Guide plate 310 and metal ground plate 320, the co-planar waveguide plate 310 include with dividing shape defect body 330；Based on the dielectric layer
100, described point of shape defect body 330 be coupled with the metal micro-strip patch 210.
In specific implementation, the relative dielectric constant interval of the dielectric layer 100 is 1-100, and Thickness section is
0.05-5mm。
It should be noted that the parting defect include parting defect sturcture in body, based on the parting defect sturcture
It is space filling, spatial character is converted into electromagnetic property, realizes trap processing, and the size by adjusting the space, it is real
Now trap centre frequency is moved to low frequency direction.
Wherein：εrFor the dielectric constant of dielectric-slab, λ0The wavelength corresponding to center frequency point for the passband of filter, λg
To be ε in dielectric constantrDielectric-slab median filter passband center frequency point corresponding to relative wavelength, f0For filter
Passband center frequency point, c 3*10^8m/s, L1For 311 and 313 two-part length, L in co-planar waveguide plate2It is coplanar
312 length in waveguide plate.
Specifically, since body 330 is realized with the metal micro-strip patch 210 based on the dielectric layer 100 with dividing shape defect for this
Be coupled, then can by change the dielectric-slab dielectric constant size adjust filter passband size and center frequency point
Position.
As shown in Figure 2 is the concrete structure schematic diagram of the first metal layer, wherein the metal micro-strip patch 210 includes closing
In the first patch and the second patch of the center line symmetrical setting of the first metal layer；
First patch includes the first component 211 and second component 212, first component one end connection described first
The first edge of metal layer 200,211 other end of the first component are connected with 212 one end of the second component, described second
The other end of part is symmetrical about the second component 213 of the first metal layer center line and the second patch；Second patch
214 one end of the first component is connected with the second component 213 of second patch, and the other end connects the second of the first metal layer
Edge, the first edge are symmetrical about the center line of the first metal layer with the second edge.
The central shaft of the metal micro-strip patch, and the center line of the central shaft and the first metal layer are represented by dashed line in Fig. 2
It overlaps.
Specifically, axially symmetric structure centered on the metal micro-strip patch 210.
Wherein, the first component and second component are respectively rectangular configuration.
Preferably, which uses microstrip line construction, width to be less than the second component.
As shown in Figure 3 is the concrete structure schematic diagram of second metal layer 300, wherein the metal ground plate 320 surrounds institute
Co-planar waveguide plate 310 is stated, and the metal ground plate 320 is not connected to the co-planar waveguide plate 310.
Specifically, described point of shape defect body 330 be set to the center of the co-planar waveguide plate 310.
Wherein, which is rectangular structure, which is rectangle frame, internal hollow out knot
Structure 321 carries the co-planar waveguide plate 310, and 320 inside of metal ground plate is not connected to the co-planar waveguide plate 310, the metal
Earth plate 320 and co-planar waveguide plate 310 establish space structure between the two by being arranged in 100 the same face of dielectric layer.
Specifically, the size due to changing the metal ground plate 320, can also change space in the list notch filter and tie
Structure then changes the length and width of the peripheral length and width and internal engraved structure 321 of the metal ground plate 320, may be implemented to change single trap
Space structure in filter realizes the passband width and center frequency point for changing filter.
Wherein, which uses step impedance resonator.
As shown in Figure 4 is the concrete structure schematic diagram of co-planar waveguide plate 310, wherein the co-planar waveguide plate 310 uses square
Shape and structure, the co-planar waveguide plate 310 include the first part 311 for being arranged in order and being connected according to long side, second part 312
With Part III 313, wherein first part 311 and Part III 313 are identical, and the length of the broadside of the first part 311 is small
In the length of the broadside of the second part 312.
The central shaft of the co-planar waveguide plate 310, and the central shaft and first part 311, second are represented by dashed line in Fig. 4
Divide the center line coincidence of 312 and Part III 313.
Wherein, the of the first part 311 of the co-planar waveguide plate 310 and Part III 313 and the metal micro-strip patch 210
Two components, 212/214 size is identical.
Wherein, the distance between two 211/213 edges of the first component of the metal micro-strip patch 210 and the co-planar waveguide
The length of the second part 312 of plate 310 is identical.
It should be noted that the size due to changing co-planar waveguide plate 310, it is hollow can also to change the list notch filter
Between structure then change the long width values of first part/Part III and second part in the co-planar waveguide plate 310, may be implemented
Change space structure in single notch filter, realizes the passband width and center frequency point for changing filter.
Wherein, identical with Part III due to the first part, then when changing co-planar waveguide 310 size of plate, need same
When to the size synchronous change of first part and Part III.
Wherein, this with dividing shape defect body use Y type fractal structures.
Specifically, the Y type fractal structures carry out N ranks using X-Y scheme fractal model divides shape, wherein the N values are
Positive integer more than 1.
It is the single order parting defect sturcture schematic diagram of with dividing shape defect body 330 as shown in Fig. 5 (a), has in the structure
Three parts composition y-type structure, by the y-type structure length (L) and width (W) be changed, can realize change
Space structure in the list notch filter.
It is the second order parting defect sturcture schematic diagram of with dividing shape defect body 330 as shown in Fig. 5 (b), has in the structure
The second order y-type structure that three y-type structures combine, by the y-type structure length (L) and width (W) be changed,
It can realize and change space structure in the list notch filter.
It is second order parting defect sturcture schematic diagram after with the dividing shape defect improvement of body 330, the structure as shown in Fig. 5 (c)
In there is y-type structure, by being changed to the micro-strip line length (l) in the y-type structure, can realize that changing the list trap filters
Space structure in wave device.
Wherein, L is fixed in second order parting defect sturcture after the improvement, i.e. the center frequency point of fixed filters passband, only logical
Overregulate the size of micro-strip line length l in Y type point shape defect ground structures, it can be achieved that trap centre frequency from 4.94GHz to
The adjusting of 7.20GHz expands trap frequency variation range.
Specifically, when the size of the l changes from 0 to 1.8mm, tune of the trap centre frequency from 4.94GHz to 7.20GHz
Section.L values are about big, and the frequency that ultra-wide band filter can filter out is smaller.
Shown in fig. 6 is the concrete structure schematic diagram with the second metal layer of second order parting defect sturcture after improvement.
As shown in Figure 7 is another structural schematic diagram of single notch filter, which includes：Dielectric layer
100, the first metal layer 200 and second metal layer 300；
The Fig. 7 is the perspective view of overlook direction, wherein the first part 311 of the co-planar waveguide plate 310 is about the medium
The projection of layer 100, overlaps with the second component 212 of the first patch in the metal micro-strip patch 210；The co-planar waveguide plate
214 weight of second component of second patch in projection of the Part III 313 about the dielectric layer, with the metal micro-strip patch
It closes.
It should be noted that by above-mentioned projection coincidence system, with dividing shape defect body 330 and the metal micro-strip patch
210 are coupled, the projection coincidence system so that this with dividing shape defect body 330 and the metal micro-strip patch 210 with vertical transition
Mode realize coupling and the metal micro-strip patch 210 by way of vertical transition with metal ground plate 320 and co-planar waveguide plate
310 are coupled.
It should be noted that in a kind of single notch filter provided herein, due to being respectively set in dielectric layer both sides
There are the first metal layer and second metal layer, and be provided with comprising point shape defect body in the second metal layer, and this divides shape defect
Ground body is coupled with the first metal layer metal micro-strip patch based on the dielectric layer, since using micro-strip and defect form is real for filter
It is existing, based on the space filling of fractal structure, spatial character is converted into electromagnetic property, it is not necessary to using the cascade of multiple filters
Mode, also achieve filter trap, and the volume due to dividing shape defect geotexture to be much smaller than multiple cascading filters,
The volume for reducing filter solves the mismatch problems between component, improves the efficiency of system.
A kind of single notch filter is described in detail in the embodiment that aforementioned present invention provides, the present invention also provides one kind
Electronic equipment with the list notch filter is given below specific embodiment and is described in detail.
Attached drawing 8 is please referred to, is the structural schematic diagram of a kind of electronic equipment embodiment provided by the invention, the electronic equipment packet
It includes：Ontology 801 and single notch filter 802；
Wherein, the ontology is for carrying the list notch filter 802；
Wherein, the list notch filter 802, including：
Dielectric layer；
It is set to the first metal layer in the first face of the dielectric layer；
It is set to the second metal layer in the second face of the dielectric layer, first face is opposite with second face；
Wherein, the first metal layer includes metal micro-strip patch, and the second metal layer includes co-planar waveguide plate and gold
Belong to earth plate, the co-planar waveguide plate includes with dividing shape defect body；Based on the dielectric layer, with the dividing shape defect body with it is described
Metal micro-strip patch is coupled.
Preferably, the metal micro-strip patch includes the first patch of the center line symmetrical setting about the first metal layer
Piece and the second patch；
Described first component one end connects the first edge of the first metal layer, the first component other end with it is described
Second component one end is connected, the other end of the second component about the first metal layer center line and the second patch second
Component is symmetrical；One section of the first component of second patch is connected with the second component of second patch, and the other end connects institute
State the second edge of the first metal layer, the first edge and center line pair of the second edge about the first metal layer
Claim.
Preferably, the co-planar waveguide plate uses step impedance resonator.
Preferably, the metal ground plate surrounds the co-planar waveguide plate, and the metal ground plate and the coplanar wave
Guide plate is not connected to.
Preferably, described point of shape defect body be set to the center of the co-planar waveguide plate.
Preferably, the co-planar waveguide plate uses rectangular structure, and the co-planar waveguide plate includes being arranged successively according to long side
Row and connected first part, second part and Part III, wherein first part is identical with Part III, described first
The length of the broadside divided is less than the length of the broadside of the second part.
Preferably, projection of the first part of the co-planar waveguide plate about the dielectric layer is pasted with the metal micro-strip
The second component of the first patch overlaps in piece；Projection of the Part III of the co-planar waveguide plate about the dielectric layer, with institute
The second component for stating the second patch in metal micro-strip patch overlaps.
Preferably, with the dividing shape defect body uses Y type fractal structures.
Preferably, the Y types fractal structure divides shape using X-Y scheme fractal model progress N ranks, wherein the N values
For the positive integer more than 1.
Preferably, the relative dielectric constant interval of the dielectric layer is 1-100, and Thickness section is 0.05-
5mm。
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.The device provided for embodiment
For, since it is corresponding with the method that embodiment provides, so description is fairly simple, related place is said referring to method part
It is bright.
Above description to the embodiment provided, enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principle provided in this article and features of novelty phase one
The widest range caused.
Claims (10)
1. a kind of list notch filter, which is characterized in that including：
Dielectric layer；
It is set to the first metal layer in the first face of the dielectric layer；
It is set to the second metal layer in the second face of the dielectric layer, first face is opposite with second face；
Wherein, the first metal layer includes metal micro-strip patch, and the second metal layer includes that co-planar waveguide plate and metal connect
Floor, the co-planar waveguide plate include with dividing shape defect body；Based on the dielectric layer, with the dividing shape defect body and the metal
Microband paste is coupled；
Wherein, with the dividing shape defect body is second order parting defect sturcture after improving, which uses Y type fractal structures, Y types point
Length in shape defect geotexture is fixed, and the size of micro-strip line length in shape defect geotexture is divided by adjustable Y-shaped, with reality
The adjusting of existing trap centre frequency, expands trap frequency variation range.
2. list notch filter according to claim 1, which is characterized in that the metal micro-strip patch includes about described
The first patch and the second patch of the center line symmetrical setting of the first metal layer；
First patch includes the first component and second component, and described first component one end connects the of the first metal layer
One edge, the first component other end are connected with described second component one end, and the second component is about first metal
The second component of layer center line and the second patch is symmetrical；The of first component one end of second patch and second patch
Two components are connected, and the first component other end of second patch connects the second edge of the first metal layer, and described first
Edge is symmetrical about the center line of the first metal layer with the second edge.
3. list notch filter according to claim 1, which is characterized in that the co-planar waveguide plate is humorous using Stepped Impedance
Shake device.
4. list notch filter according to claim 2, which is characterized in that the metal ground plate surrounds the coplanar wave
Guide plate, and the metal ground plate is not connected to the co-planar waveguide plate.
5. list notch filter according to claim 4, which is characterized in that described point of shape defect body be set to it is described total
The center of surface wave guide plate.
6. list notch filter according to claim 4, which is characterized in that the co-planar waveguide plate uses rectangular-shaped knot
Structure, the co-planar waveguide plate include the first part for being arranged in order and being connected according to long side, second part and Part III,
In, first part is identical with Part III, and the length of the broadside of the first part is less than the length of the broadside of the second part
Degree.
7. it is according to claim 6 list notch filter, which is characterized in that the first part of the co-planar waveguide plate about
The projection of the dielectric layer is overlapped with the second component of the first patch in the metal micro-strip patch；The co-planar waveguide plate
Projection of the Part III about the dielectric layer is overlapped with the second component of the second patch in the metal micro-strip patch.
8. list notch filter according to claim 1, which is characterized in that the Y types fractal structure uses X-Y scheme
Fractal model carries out N ranks and divides shape, wherein the N values are the positive integer more than 1.
9. list notch filter according to claim 1, which is characterized in that the relative dielectric constant value of the dielectric layer
Section is 1-100, and Thickness section is 0.05-5mm.
10. a kind of electronic equipment, which is characterized in that including single notch filter；
Wherein, single notch filter, including：
Dielectric layer；
It is set to the first metal layer in the first face of the dielectric layer；
It is set to the second metal layer in the second face of the dielectric layer, first face is opposite with second face；
Wherein, the first metal layer includes metal micro-strip patch, and the second metal layer includes that co-planar waveguide plate and metal connect
Floor, the co-planar waveguide plate include with dividing shape defect body；Based on the dielectric layer, with the dividing shape defect body and the metal
Microband paste is coupled；
Wherein, with the dividing shape defect body is second order parting defect sturcture after improving, which uses Y type fractal structures, Y types point
Length in shape defect geotexture is fixed, and the size of micro-strip line length in shape defect geotexture is divided by adjustable Y-shaped, with reality
The adjusting of existing trap centre frequency, expands trap frequency variation range.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511025136.9A CN105609905B (en) | 2015-12-30 | 2015-12-30 | A kind of list notch filter and electronic equipment |
| US15/085,418 US9997817B2 (en) | 2015-12-30 | 2016-03-30 | Filter and electronic device |
| DE102016105828.9A DE102016105828A1 (en) | 2015-12-30 | 2016-03-30 | Filter and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511025136.9A CN105609905B (en) | 2015-12-30 | 2015-12-30 | A kind of list notch filter and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN105609905A CN105609905A (en) | 2016-05-25 |
| CN105609905B true CN105609905B (en) | 2018-11-09 |
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| CN201511025136.9A Active CN105609905B (en) | 2015-12-30 | 2015-12-30 | A kind of list notch filter and electronic equipment |
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| CN108767460B (en) * | 2018-05-23 | 2024-01-02 | 辽宁工程技术大学 | Ultra-wideband antenna with triple notch characteristics |
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