CN106099279A - A kind of high-end precipitous roll-off filter of miniaturization passband - Google Patents
A kind of high-end precipitous roll-off filter of miniaturization passband Download PDFInfo
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- CN106099279A CN106099279A CN201610617075.3A CN201610617075A CN106099279A CN 106099279 A CN106099279 A CN 106099279A CN 201610617075 A CN201610617075 A CN 201610617075A CN 106099279 A CN106099279 A CN 106099279A
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- precipitous
- filter
- roll
- passband
- miniaturization
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a kind of high-end precipitous roll-off filter of miniaturization passband, it is characterised in that: use planar microstrip circuit form, use the mode loading multiple stepped impedance minor matters on one section of microstrip line, form the basic structure of multimode resonator.Advantage: this basic structure has good standing wave and insertion loss in the free transmission range of broadband, high-end selectivity is good, miniaturized structure, and can cascade further, form selectivity more preferably wave filter, the most integrated, superior performance, can be widely used for all kinds of microwave system.
Description
Technical field
The present invention relates to a kind of high-end precipitous roll-off filter of miniaturization passband, belong to the skill such as microwave communication, radar
Art field.
Background technology
Microwave filter is widely used in the system such as electronics, communication, is one of critical component therein.Microstrip filter
The circuit form planarized due to it, it is easy to accomplish the miniaturization of system, and lightweight, the most integrated, it is widely used in
In all kinds of microwave modules, system.But due to the restriction of microstrip circuit Q-value, the squareness factor of microstrip filter is difficult to filter with cavity
Ripple device matches in excellence or beauty, but by Curve guide impeller, such as elliptic function filter design, the method such as bimodulus, multi-mode filter design, it is possible to
Improve the filtering selectivity of microstrip filter, thus while obtaining miniaturization, it is thus achieved that preferably performance of filter, at some
Occasion is obtained in that the effect being equal to cavity body filter, it is thus achieved that the favor of user.
In planar multimode Structure Filter, dual mode filter has obtained paying close attention to and research at first, and it utilizes degenerate mode
Perturbation formed highly selective filter, keep simple structure, little size simultaneously.Containing more multi-mode (three moulds and three moulds
Filter construction above) has obtained sufficient concern and research in recent years, such as comprises the multimode filter of stepped impedance structure
Ripple device is i.e. the focus of current research.The three above multi-mode filters of mould can not only obtain high selective filter passband, moreover it is possible to
Form broadband, ultra broadband or the pass band width of many passbands.Multi-mode filter is that the research and development of plane high performance filter brings
New opportunity, launches abundant research design to it so that it is obtain extensive and deep application in more occasions, strong promote micro-
Ripple, the progress of millimeter-wave systems.
Summary of the invention
The invention provides a kind of high-end precipitous roll-off filter of miniaturization passband, its purpose makes it have in free transmission range
Have good standing wave and insertion loss, passband high-end have well filter selectivity, and there is compact miniaturization structure, easily
In integrated, the requirement of all kinds of microwave components, Widening Technique application can be met.
The technical solution of the present invention: a kind of high-end precipitous roll-off filter of miniaturization passband, it is characterised in that: use
Planar microstrip circuit form, employing load the mode of multiple stepped impedance minor matters on one section of microstrip line, form multimode resonator
Basic structure.
The present invention compared with prior art, has the advantage that
1) by the way of loading multiple stepped impedance minor matters on the microstrip line of one section of suitable length, multimode resonator is formed
Basic structure, can form the miniaturization structure with broadband width response, and obtain the high-end precipitous performance of roll-offing of passband, its
There is in passband good standing wave and insertion loss；
2), when the input of this mode filter, output interface use the microstrip line of characteristic impedance coupling, the passband forming miniaturization is high
Hold precipitous (quasi-elliptic function) low pass filter that roll-offs.When input, the output interface employing coupled microstrip line of this mode filter,
May be formed at the high-end broadband band-pass filter with precipitous performance of roll-offing of passband；
3) two wave filter containing this type structure are carried out cascade, it is possible to obtain preferably filter selectivity；
4) this circuit is beneficial to Planar integration, can meet the requirement of all kinds of microwave, millimeter wave component；
5) the high-end precipitous low pass roll-offed or broadband band-pass filter are formed in compact manner.
Accompanying drawing explanation
Fig. 1 is the high-end precipitous low-pass filter structure schematic diagram that roll-offs.
Fig. 2 be input, output interface part be the high-end precipitous band bucket filter construction schematic diagram that roll-offs of coupled microstrip line.
Fig. 3 be input, output port be the three interdigital high-end precipitous roll-off filter structural representations of coupling line bandwidth increase type
Figure.
Fig. 4 is the high-end precipitous low-pass filter structure schematic diagram that roll-offs of two cascades.
Fig. 5 be two with the high-end precipitous roll-off filter structural representation in broadband of coupling line cascade.
In figure 1,2 is input, output port, and 3 is A stepped impedance minor matters, and 4 is B stepped impedance minor matters, and 5 is the resistance of C ladder
Anti-minor matters, 6 is D stepped impedance minor matters, and 7 is multimode resonator, and 8 is one section of microstrip line, and 9 is that double cross refers to coupling line, and 10 is three friendships
Referring to coupling line, 11 is the high-end precipitous low pass filter that roll-offs of single passband, and 12 is that the high-end precipitous broadband belt that roll-offs of single passband leads to
Wave filter.
Detailed description of the invention
A kind of high-end precipitous roll-off filter of miniaturization passband, uses planar microstrip circuit form, uses one section of micro-strip
Load the mode of multiple stepped impedance minor matters on line, form the basic structure of multimode resonator.
The microstrip line that the input of described multimode resonator, output interface are mated with the external world by characteristic impedance is directly connected to,
Form the high-end precipitous low pass filter that roll-offs of passband.
The input of described multimode resonator, output interface or be connected with coupled microstrip line, form the high-end precipitous rolling of passband
The broadband band-pass filter of fall, connects how interdigital coupled microstrip line and widens the bandwidth of this band filter further.
The basic structure of described multimode resonator can two direct cascades, or two with coupling line form cascade, is formed
The high-end precipitous low pass filter that roll-offs of passband of two cascades, or two precipitous roll-off so that the broadband of coupling line form cascade is high-end
Wave filter.
The mode of described multiple stepped impedance minor matters, is that the two ends of microstrip line 8 are input, output port, and A ladder hinders
Anti-minor matters 3, B stepped impedance minor matters 4, C stepped impedance minor matters 5, D stepped impedance minor matters 6 load on microstrip line 8, microstrip line 8 points
Not and A stepped impedance minor matters 3, B stepped impedance minor matters 4, C stepped impedance minor matters 5, D stepped impedance minor matters 6 form multimode resonator
7, whole wave filter forms the high-end precipitous low pass filter that roll-offs in broadband.
Described input, output interface part are the high-end precipitous roll-off filter of coupled microstrip line, and its structure is with double
Interdigital coupling line 9 mode connects multimode resonator and forms the high-end precipitous band filter that roll-offs in broadband.
Described input, output port are the three interdigital coupling line high-end precipitous roll-off filters of bandwidth increase type, its structure
It is to connect multimode resonator in three interdigital coupling line 10 modes to form the high-end precipitous band filter that roll-offs of broader bandwidth.
The high-end precipitous low pass filter that roll-offs of passband of two described cascades, its structure is that the passband of two cascades is high-end
The precipitous low pass filter 11 that roll-offs.
Described two with the high-end precipitous roll-off filter in broadband of coupling line cascade, its structure be two with coupled modes
The high-end precipitous broadband band-pass filter 12 that roll-offs of cascade.
The microstrip line that the input of the wave filter of described multimode resonator, output interface can be mated with the external world by characteristic impedance
It is directly connected to, forms high-end precipitous (quasi-elliptic function) low pass filter that roll-offs of passband, or be connected with coupled microstrip line, formed logical
With the high-end precipitous broadband band-pass filter roll-offed.
Further illustrate technical scheme below in conjunction with the accompanying drawings:
As it is shown in figure 1, the high-end precipitous low pass filter that roll-offs in broadband, its structure be the two ends of microstrip line 8 be input, outfan
Mouthful, A stepped impedance minor matters 3, B stepped impedance minor matters 4, C stepped impedance minor matters 5, D stepped impedance minor matters 6 load on microstrip line 8
On, microstrip line 8 respectively with A stepped impedance minor matters 3, B stepped impedance minor matters 4, C stepped impedance minor matters 5, D stepped impedance minor matters 6 shape
Becoming multimode resonator 7, whole wave filter forms the high-end precipitous low pass filter that roll-offs in broadband.
As in figure 2 it is shown, input, output interface part are the high-end precipitous roll-off filter of coupled microstrip line, its structure is
Refer to that coupling line 9 mode connects multimode resonator and forms the high-end precipitous band filter that roll-offs in broadband with double cross.
As it is shown on figure 3, input, output port be the three interdigital coupling line high-end precipitous roll-off filters of bandwidth increase type, its
Structure is to connect multimode resonator in three interdigital coupling line 10 modes to form the high-end precipitous band filter that roll-offs of broader bandwidth.
As shown in Figure 4, the high-end precipitous low pass filter that roll-offs of two cascades, its structure is that the passband of two cascades is high-end
The precipitous low pass filter 11 that roll-offs.
As it is shown in figure 5, two with the high-end precipitous roll-off filter in broadband of coupling line cascade, its structure be two with coupling
The high-end precipitous broadband band-pass filter 12 that roll-offs of mode cascade.
The wave filter of this multimode resonator also has good standing wave and insertion loss characteristic, passband high-end choosing selecting property of filtering
Good, miniaturized structure, the most integrated, superior performance, can be widely used for all kinds of microwave system.
The above is only the preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some design structures improve preparation method retouching, these
Improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. the high-end precipitous roll-off filter of miniaturization passband, it is characterised in that: use planar microstrip circuit form, use
Load the mode of multiple stepped impedance minor matters on one section of microstrip line, form the basic structure of multimode resonator.
A kind of high-end precipitous roll-off filter of miniaturization passband the most according to claim 1, it is characterised in that described many
The microstrip line that the input of mould resonator, output interface are mated with the external world by characteristic impedance is directly connected to, and forms passband high-end precipitous
Roll-off low pass filter.
A kind of high-end precipitous roll-off filter of miniaturization passband the most according to claim 1, it is characterised in that described many
The input of mould resonator, output interface or be connected with coupled microstrip line, form the high-end precipitous broadband belt pass filter roll-offed of passband
Device, connects how interdigital coupled microstrip line and widens the bandwidth of this band filter further.
A kind of high-end precipitous roll-off filter of miniaturization passband the most according to claim 1, it is characterised in that described many
Two direct cascades of the basic structure of mould resonator, or two with coupling line form cascade, and the passband forming two cascades is high-end
The precipitous low pass filter that roll-offs, or two with the high-end precipitous roll-off filter in broadband of coupling line form cascade.
A kind of high-end precipitous roll-off filter of miniaturization passband the most according to claim 1, it is characterised in that described many
The mode of individual stepped impedance minor matters, is that the two ends of microstrip line are input, output port, A stepped impedance minor matters, B stepped impedance branch
Joint, C stepped impedance minor matters, D stepped impedance minor matters load on microstrip line, microstrip line respectively with A stepped impedance minor matters, B ladder
Impedance minor matters, C stepped impedance minor matters, D stepped impedance minor matters form multimode resonator, and it is high-end precipitous that whole wave filter forms broadband
Roll-off low pass filter.
6. according to the high-end precipitous roll-off filter of a kind of miniaturization passband described in claim, it is characterised in that described is defeated
Enter, output interface part is the high-end precipitous roll-off filter of coupled microstrip line, and its structure is to refer to that coupling line mode is even with double cross
Connect multimode resonator and form the high-end precipitous band filter that roll-offs in broadband.
A kind of high-end precipitous roll-off filter of miniaturization passband the most according to claim 2, it is characterised in that described is defeated
Enter, output port is the three interdigital coupling line high-end precipitous roll-off filters of bandwidth increase type, and its structure is with three interdigital coupling lines
Mode connects multimode resonator and forms the high-end precipitous band filter that roll-offs of broader bandwidth.
A kind of high-end precipitous roll-off filter of miniaturization passband the most according to claim 4, it is characterised in that described two
The high-end precipitous low pass filter that roll-offs of passband of individual cascade, its structure is the high-end precipitous low-pass filtering of roll-offing of passband of two cascades
Device.
A kind of high-end precipitous roll-off filter of miniaturization passband the most according to claim 4, it is characterised in that described two
The high-end precipitous roll-off filter in the individual broadband with coupling line cascade, its structure be two with the high-end precipitous rolling of coupled modes cascade
Fall broadband band-pass filter.
A kind of high-end precipitous roll-off filter of miniaturization passband the most according to claim 2, it is characterised in that described
The microstrip line that the input of the wave filter of multimode resonator, output interface can be mated with the external world by characteristic impedance is directly connected to, and is formed
High-end precipitous (quasi-elliptic function) low pass filter that roll-offs of passband, or be connected with coupled microstrip line, form the high-end precipitous rolling of passband
The broadband band-pass filter of fall.
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| CN201610617075.3A CN106099279A (en) | 2016-08-01 | 2016-08-01 | A kind of high-end precipitous roll-off filter of miniaturization passband |
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| CN201610617075.3A CN106099279A (en) | 2016-08-01 | 2016-08-01 | A kind of high-end precipitous roll-off filter of miniaturization passband |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110729533A (en) * | 2019-09-30 | 2020-01-24 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Asymmetric SIR loaded wide stop band suppression broadband band-pass filter |
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