CN106209008B - A kind of filter and electronic equipment - Google Patents
A kind of filter and electronic equipment Download PDFInfo
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- CN106209008B CN106209008B CN201610502817.8A CN201610502817A CN106209008B CN 106209008 B CN106209008 B CN 106209008B CN 201610502817 A CN201610502817 A CN 201610502817A CN 106209008 B CN106209008 B CN 106209008B
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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
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
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- Filters And Equalizers (AREA)
Abstract
The present invention discloses a kind of filter and electronic equipment.Wherein, the filter includes first capacitor, the first microstrip line, the first inductance and the second microstrip line, one end of first microstrip line is connected with one end of first capacitor, one end of first inductance is connected with the other end of the first microstrip line, one end of second microstrip line is connected with the other end of the first inductance, and the other end of the second microstrip line is connected with the other end of first capacitor.It is used by using microstrip line and discrete component inductance mixed, to replace simple inductance, on the one hand, it overcomes the high-frequency effects of big inductance, to improve the quality factor of inductance and reduce with interior Insertion Loss；On the other hand, also there is the flexibility of debugging, for example, designer can adjust microstrip line to random length, make discrete component inductance using conventional inductance value inductance, to reduce production cost.
Description
Technical field
The present invention relates to filter field more particularly to a kind of filters and electronic equipment.
Background technique
The bands of television signals transmitted at present in wire cable is usually within 1GHz, but with multimedia hair
Exhibition, the especially extensive use of multimedia over Coax Alliance (Multimedia over Coax Alliance, MoCA) are led to
Cross the frequency band signals that 1GHz or more is transmitted by the way of sharing wireline cable.However the frequency band signals of the 1GHz or more need from
Equipment itself issues, signal several orders of magnitude, such as 40 dB by force that power is often issued than cable television, and its frequency
Rate interval at least only has 100MHz, normally receives and impacts to wire signal, therefore the filtering of narrow transition band, high rejection ability
The frequency band signals that device handles the 1GHz or more more show important.
The prior art discloses a kind of triplexer, which obtains the intermediate zone of lesser filter using air core inductor
Performance, however the triplexer has that consistency is bad, when production, need the process of tuning, cause prouctiveness low
It is lower and expensive.
The prior art has and discloses a kind of filter, which is made of discrete component capacitor and inductance, can filter
The noise signal of wave 1GHz or more.But in VHF/UHF wave band, due to skin effect, the inductor loss of the filter increases,
The quality factor of inductance reduces.The filter is difficult to Insertion Loss and precipitous intermediate zone in lesser band.
Summary of the invention
In view of this, it is necessary to exist for the above-mentioned prior art and ask with interior Insertion Loss is big and the quality factor of inductance is high
Topic provides a kind of filter and electronic equipment.
A kind of filter provided in an embodiment of the present invention, comprising:
First capacitor；
One end of first microstrip line, first microstrip line is connected with one end of the first capacitor；
First inductance, one end of first inductance are connected with the other end of first microstrip line；
Second microstrip line, one end of second microstrip line are connected with the other end of first inductance, and described second is micro-
The other end with line is connected with the other end of the first capacitor.
In one of them embodiment, the filter further include:
Second capacitor, one end of second capacitor respectively with one end of first microstrip line and the first capacitor
One end connection, one end ground connection of second capacitor；
Third capacitor, one end of the third capacitor respectively with the other end of second microstrip line and the first capacitor
The other end connection.
In one of them embodiment, the filter further include:
4th capacitor；
Third microstrip line, one end of the third microstrip line respectively with one end of the 4th capacitor and the third capacitor
One end connection；
Second inductance, one end of second inductance are connected with the other end of the third microstrip line；
One end of 4th microstrip line, the 4th microstrip line is connected with the other end of second inductance；
5th capacitor, one end of the 5th capacitor respectively with the other end and the 4th capacitor of the 4th microstrip line
The other end connection, the 5th capacitor the other end ground connection.
In one of them embodiment, the filter further include:
6th capacitor；
5th microstrip line, one end of the 5th microstrip line respectively with one end of the 6th capacitor and the 5th capacitor
One end connection；
Third inductance, one end of the third inductance are connected with the other end of the 5th microstrip line；
One end of 6th microstrip line, the 6th microstrip line is connected with the other end of the third inductance；
7th capacitor, one end of the 7th capacitor respectively with the other end and the 6th capacitor of the 6th microstrip line
The other end connection, the 7th capacitor the other end ground connection.
In one of them embodiment, first microstrip line, second microstrip line, the third microstrip line,
The width of 4th microstrip line, the 5th microstrip line and the 6th microstrip line is 0.01 inch, and length is 0.1 English
It is very little.
A kind of electronic equipment provided in an embodiment of the present invention, comprising:
Antenna, for receiving and emitting wireless signal；
Filter is connected with the antenna, for filtering out the high-frequency signal from the antenna feed-in, exports filtering signal；
Amplifying circuit is connected with the filter, for amplifying the filtering signal；
Wherein, the filter includes:
First capacitor；
One end of first microstrip line, first microstrip line is connected with one end of the first capacitor；
First inductance, one end of first inductance are connected with the other end of first microstrip line；
Second microstrip line, one end of second microstrip line are connected with the other end of first inductance, and described second is micro-
The other end with line is connected with the other end of the first capacitor.
In one of them embodiment, the filter further include:
Second capacitor, one end of second capacitor respectively with one end of first microstrip line and the first capacitor
One end connection, one end ground connection of second capacitor；
Third capacitor, one end of the third capacitor respectively with the other end of second microstrip line and the first capacitor
The other end connection.
In one of them embodiment, the filter further include:
4th capacitor；
Third microstrip line, one end of the third microstrip line respectively with one end of the 4th capacitor and the third capacitor
One end connection；
Second inductance, one end of second inductance are connected with the other end of the third microstrip line；
One end of 4th microstrip line, the 4th microstrip line is connected with the other end of second inductance；
5th capacitor, one end of the 5th capacitor respectively with the other end and the 4th capacitor of the 4th microstrip line
The other end connection, the 5th capacitor the other end ground connection.
In one of them embodiment, the filter further include:
6th capacitor；
5th microstrip line, one end of the 5th microstrip line respectively with one end of the 6th capacitor and the 5th capacitor
One end connection；
Third inductance, one end of the third inductance are connected with the other end of the 5th microstrip line；
One end of 6th microstrip line, the 6th microstrip line is connected with the other end of the third inductance；
7th capacitor, one end of the 7th capacitor respectively with the other end and the 6th capacitor of the 6th microstrip line
The other end connection, the 7th capacitor the other end ground connection.
In one of them embodiment, first microstrip line, second microstrip line, the third microstrip line,
The width of 4th microstrip line, the 5th microstrip line and the 6th microstrip line is 0.01 inch, and length is 0.1 English
It is very little.
In embodiments of the present invention, it is used by using microstrip line and discrete component inductance mixed, to replace simple electricity
Sense, on the one hand, it overcomes the high-frequency effects of big inductance, to improve the quality factor of inductance and reduce with interior Insertion Loss；Another party
Face also has the flexibility of debugging, for example, designer can adjust microstrip line to random length, makes discrete component inductance
With conventional inductance value inductance, to reduce production cost and delivery cycle.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the present invention implements a kind of filter that one provides；
Fig. 1 a is the structural schematic diagram for the seven rank Low-pass Elliptic Filter of one kind that the embodiment of the present invention one provides the prior art；
Fig. 1 b is the amplitude-frequency characteristic response curve that seven rank Low-pass Elliptic Filters obtain under ideal conditions shown in Fig. 1 a
Figure；
Fig. 1 c is the resonse characteristic figure between the inductance coefficent that the embodiment of the present invention one provides and frequency；
Fig. 1 d is the resonse characteristic figure between the quality factor and frequency of the inductance that the embodiment of the present invention one provides；
Fig. 1 e is that seven rank Low-pass Elliptic Filters shown in Fig. 1 a use merely amplitude-frequency characteristic response when wire-wound inductor bent
Line chart；
Fig. 2 is the structural schematic diagram that the present invention implements a kind of filter that two provide；
Fig. 3 is the structural schematic diagram that the present invention implements a kind of filter that three provide；
Fig. 4 is the structural schematic diagram that the present invention implements a kind of filter that four provide；
Fig. 4 a is a kind of amplitude-frequency characteristic response curve for filter that the embodiment of the present invention four provides；
Fig. 5 is the structural schematic diagram for a kind of electronic equipment that the embodiment of the present invention five provides.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Embodiment one
Referring to FIG. 1, Fig. 1 is the structural schematic diagram that the present invention implements a kind of filter that one provides.As shown in Figure 1, should
Filter includes first capacitor C1, the first microstrip line M1, the first inductance L1 and the second microstrip line M2, and the one of the first microstrip line M1
End is connected with one end of first capacitor C1, and one end of the first inductance L1 is connected with the other end of the first microstrip line M1, the second micro-strip
One end of line M2 is connected with the other end of the first inductance L1, and the other end of the second microstrip line M2 and the other end of first capacitor C1 connect
It connects.Signal to be filtered is inputted by filter input 11, by filtering, is exported by filtering output end 12.
Fig. 1 a is please referred to, Fig. 1 a is that the embodiment of the present invention one provides the seven rank Low-pass Elliptic Filter of one kind of the prior art
Structural schematic diagram.As shown in Figure 1a, which is constituted using lamped element, the seven ranks elliptical low-pass
The input terminal 1a1 input processing signal of wave device exports the processing signal from output end 1a2 by processing.Fig. 1 b is please referred to, is schemed
1b is the amplitude-frequency characteristic response curve that seven rank Low-pass Elliptic Filters obtain under ideal conditions shown in Fig. 1 a.Such as Fig. 1 b institute
Show, in 0.95GHz, i.e. 1b point, the decibel value of the seven ranks Low-pass Elliptic Filter is -1.539dB.In 1.1GHz, i.e. 2b
Point, the decibel value of the seven ranks Low-pass Elliptic Filter are -50.69dB.It is obvious that use lamped element under ideal conditions
The seven rank Low-pass Elliptic Filters constituted have very outstanding amplitude response characteristic, can filter out in 1.1GHz
The noise signal of 50dB or so.But in actual use, the inductance that seven rank Low-pass Elliptic Filters use is common electricity
Sense.When the signal of input terminal 1a1 input includes high-frequency signal, the quality factor Q of the inductance of the seven ranks Low-pass Elliptic Filter
It can sharply decline, cause to cannot achieve effective precipitous intermediate zone.
It is the sound between the inductance coefficent and frequency of the offer of the embodiment of the present invention one please also refer to Fig. 1 c and Fig. 1 d, Fig. 1 c
Performance diagram is answered, Fig. 1 d is the resonse characteristic between inductance quality factor and frequency that the embodiment of the present invention one provides
Figure.As illustrated in figure 1 c, which includes three curves, and curve S1c is inductance coefficent 100nH, and curve S2c is
Inductance coefficent 47nH's, curve S3c is inductance coefficent 3.9nH.From Fig. 1 c it is found that 1000MHz or more frequency, three songs
The slope of line increased dramatically, i.e., inductance coefficent increased dramatically.As shown in Figure 1 d, inductance corresponding to the frequency near 1000MHz
Quality factor Q value sharply decline, reason is: when frequency constantly increases, skin effect and leakage are serious, inductance coefficent
Become larger, cause loss to increase reduces with the quality factor Q value of inductance.The seven rank Low-pass Elliptic Filters constituted using lamped element
In practical work process, the edge of seven rank Low-pass Elliptic Filters is become flat, and squareness factor becomes larger.
Fig. 1 e is please referred to, Fig. 1 e is amplitude-frequency when seven rank Low-pass Elliptic Filters shown in Fig. 1 a use merely wire-wound inductor
Characteristic response curve graph.As shown in fig. le, at A point, A dot frequency be amplitude corresponding to 195.71793MHz be-
0.904dB.At B point, B dot frequency is that amplitude corresponding to 1.00000GHz is -4.321dB.It is pointed out in C, C dot frequency is
Amplitude corresponding to 1.10000GHz is -21.549dB.Incorporated by reference to Fig. 1 b, when frequency is 1.1GHz, ideal conditions can be filtered
Except 50dB, but in the actual process, 21.549dB but can only achieve, the two difference is about 30dB.It refer again to Fig. 1 e,
The front end Out-of-band rejection ability of 2GHz or more drops to -20dB, therefore, in the actual process, merely using wire-wound inductor or
The low-pass filter that person's lamped element is constituted is unable to satisfy the demand of the above Out-of-band rejection of -50dB.
In embodiments of the present invention, by by first capacitor C1, the first microstrip line M1, the first inductance L1 and the second micro-strip
Line M2 is used in mixed way and constitutes filter, and the quality factor Q value of the inductance of the first microstrip line M1 and the second microstrip line M2 is high.Phase
For the prior art, the first microstrip line M1, the second microstrip line M2 are combined with the first inductance L1, relatively by collection in the prior art
Total inductance or simple wire-wound inductor is equivalent is divided into small inductance value inductance and microstrip line equivalent inductance, to realize the small-sized of filter
Change and mass production.
Any combination form can be presented in the structure type of filter provided in an embodiment of the present invention.According to " most preferably approaching
Characteristic " standard divides, and the filter of the embodiment of the present invention can be cauer filter, Butterworth filter, Chebyshev's filter
Wave device, Bessel filter and etc..It is divided according to the selecting frequency characteristic of filter, the filter of the embodiment of the present invention can be
Low-pass filter, high-pass filter, bandpass filter and bandstop filter, the combination of more either above-mentioned various filters.
Those skilled in the art are it is understood that filter described in conjunction with the examples disclosed in this document or according to embodiment institute
The technology that the content of instruction and guide generates inspires, and can carry out equivalence replacement or deformation to the filter.Professional technician can
To use different methods to achieve the described function to each specific application, but this realization is it is not considered that beyond this
The range of application.
In embodiments of the present invention, it is used by using microstrip line and discrete component inductance mixed, to replace simple electricity
Sense, 1.1GHz at, filtering amplitude reach -49dB, close to ideal filter at 1.1GHz filtered amplitude for -
50dB.On the one hand, the high-frequency effects of big inductance are overcome, to improve the quality factor of inductance and reduce with interior Insertion Loss；It is another
Aspect also has the flexibility of debugging, for example, designer can adjust microstrip line to random length, makes discrete component inductance
Using conventional inductance value inductance, to reduce production cost and delivery cycle.
Embodiment two
Referring to FIG. 2, Fig. 2 is the structural schematic diagram that the present invention implements a kind of filter that two provide.As shown in Fig. 2, should
Filter includes first capacitor C1, the first microstrip line M1, the first inductance L1, the second microstrip line M2, the second capacitor C2 and third
Capacitor C3.Signal to be filtered is inputted by filter input 21, by filtering, is exported by filtering output end 22.
In the present embodiment, one end of the first microstrip line M1 is connected with one end of first capacitor C1, and the one of the first inductance L1
End is connected with the other end of the first microstrip line M1, and one end of the second microstrip line M2 is connected with the other end of the first inductance L1, and second
The other end of microstrip line M2 is connected with the other end of first capacitor C1, and one end of the second capacitor C2 is respectively with the first microstrip line M1's
One end is connected with one end of first capacitor C1, one end ground connection of the second capacitor C2, and one end of third capacitor C3 is micro- with second respectively
The other end with line M2 is connected with the other end of first capacitor C1.
In embodiments of the present invention, it is used by using microstrip line and discrete component inductance mixed, to replace simple electricity
Sense, 1.1GHz at, filtering amplitude reach -49dB, close to ideal filter at 1.1GHz filtered amplitude for -
50dB.On the one hand, the high-frequency effects of big inductance are overcome, to improve the quality factor of inductance and reduce with interior Insertion Loss；It is another
Aspect also has the flexibility of debugging, for example, designer can adjust microstrip line to random length, makes discrete component inductance
Using conventional inductance value inductance, to reduce production cost and delivery cycle.
Embodiment three
Referring to FIG. 3, Fig. 3 is the structural schematic diagram that the present invention implements a kind of filter that three provide.As shown in figure 3, should
Filter includes first capacitor C1, the first microstrip line M1, the first inductance L1, the second microstrip line M2, the second capacitor C2, third capacitor
C3, the 4th capacitor C4, third microstrip line M3, the second inductance L2, the 4th microstrip line M4 and the 5th capacitor C5.Signal to be filtered is logical
The input of filter input 31 is crossed to export by filtering by filtering output end 32.
In the present embodiment, one end of the first microstrip line M1 is connected with one end of first capacitor C1, and the one of the first inductance L1
End is connected with the other end of the first microstrip line M1, and one end of the second microstrip line M2 is connected with the other end of the first inductance L1, and second
The other end of microstrip line M2 is connected with the other end of first capacitor C1, and one end of the second capacitor C2 is respectively with the first microstrip line M1's
One end is connected with one end of first capacitor C1, one end ground connection of the second capacitor C2, and one end of third capacitor C3 is micro- with second respectively
The other end with line M2 is connected with the other end of first capacitor C1, one end of third microstrip line M3 respectively with the 4th capacitor C4 one
End is connected with one end of third capacitor C3, and one end of the second inductance L2 is connected with the other end of third microstrip line M3, the 4th micro-strip
One end of line M4 is connected with the other end of the second inductance L2, one end of the 5th capacitor C5 other end with the 4th microstrip line M4 respectively
It is connected with the other end of the 4th capacitor C4, the other end ground connection of the 5th capacitor C5.
In embodiments of the present invention, it is used by using microstrip line and discrete component inductance mixed, to replace simple electricity
Sense, 1.1GHz at, filtering amplitude reach -49dB, close to ideal filter at 1.1GHz filtered amplitude for -
50dB.On the one hand, the high-frequency effects of big inductance are overcome, to improve the quality factor of inductance and reduce with interior Insertion Loss；It is another
Aspect also has the flexibility of debugging, for example, designer can adjust microstrip line to random length, makes discrete component inductance
Using conventional inductance value inductance, to reduce production cost and delivery cycle.
Example IV
Referring to FIG. 4, Fig. 4 is the structural schematic diagram that the present invention implements a kind of filter that four provide.As shown in figure 4, should
Filter includes first capacitor C1, the first microstrip line M1, the first inductance L1, the second microstrip line M2, the second capacitor C2, third capacitor
C3, the 4th capacitor C4, third microstrip line M3, the second inductance L2, the 4th microstrip line M4, the 5th capacitor C5, the 6th capacitor C6, the 5th
Microstrip line M5, third inductance L3, the 6th microstrip line M6 and the 7th capacitor C7.Signal to be filtered is defeated by filter input 41
Enter, by filtering, is exported by filtering output end 42.
In the present embodiment, one end of the first microstrip line M1 is connected with one end of first capacitor C1, and the one of the first inductance L1
End is connected with the other end of the first microstrip line M1, and one end of the second microstrip line M2 is connected with the other end of the first inductance L1, and second
The other end of microstrip line M2 is connected with the other end of first capacitor C1, and one end of the second capacitor C2 is respectively with the first microstrip line M1's
One end is connected with one end of first capacitor C1, one end ground connection of the second capacitor C2, and one end of third capacitor C3 is micro- with second respectively
The other end with line M2 is connected with the other end of first capacitor C1, one end of third microstrip line M3 respectively with the 4th capacitor C4 one
End is connected with one end of third capacitor C3, and one end of the second inductance L2 is connected with the other end of third microstrip line M3, the 4th micro-strip
One end of line M4 is connected with the other end of the second inductance L2, one end of the 5th capacitor C5 other end with the 4th microstrip line M4 respectively
It is connected with the other end of the 4th capacitor C4, the other end of the 5th capacitor C5 ground connection, one end of the 5th microstrip line M5 is respectively with the 6th
One end of capacitor C6 is connected with one end of the 5th capacitor C5, and one end of third inductance L3 and the other end of the 5th microstrip line M5 connect
Connect, one end of the 6th microstrip line M6 is connected with the other end of third inductance L3, one end of the 7th capacitor C7 respectively with the 6th micro-strip
The connection of the other end of the other end of line M6 and the 6th capacitor C6, the other end ground connection of the 7th capacitor C7.
It is a kind of amplitude response spy for filter that the embodiment of the present invention four provides please also refer to Fig. 1 e and Fig. 4 a, Fig. 4 a
Linearity curve figure.As shown in fig. 4 a, curve S1 is using the amplitude response characteristic curve of the filter of pure lamped element, and curve S2 is
Using the amplitude response characteristic curve for the seven rank Low-pass Elliptic Filters that microstrip line and discrete component inductance mixed use.Such as Fig. 1 e
Shown, in S1, A dot frequency is that amplitude corresponding to 195.71793MHz is -0.904dB, and B dot frequency is 1.00000GHz
Corresponding amplitude is -4.321dB, and C dot frequency is that amplitude corresponding to 1.10000GHz is -21.549dB.In S2, D
Dot frequency is that amplitude corresponding to 150.68566MHz is -1.385dB, and E dot frequency is amplitude corresponding to 950.00000GHz
For -3.043dB, F dot frequency is that amplitude corresponding to 1.10000GHz is -49.003dB.It will be apparent that at 1.1GHz, this
The amplitude of the filtering for the filter that inventive embodiments provide reaches -49dB, and width is filtered at 1.1GHz close to ideal filter
Degree is -50dB.On the one hand, the high-frequency effects of big inductance are overcome, to improve the quality factor of inductance and reduce band interpolation
Damage；On the other hand, also there is the flexibility of debugging, for example, designer can adjust microstrip line to random length, make discrete member
Part inductance is using conventional inductance value inductance, to reduce production cost and delivery cycle.Further, which also has following
Advantage:
1, it is less than 2dB with interior Insertion Loss；
2, the squareness factor of filter is less than 1.2, i.e. the ratio of 3dB and 40dB bandwidth；
3, attenuation outside a channel is greater than 40dB；
4, using common FR4, two-ply low-cost design；
5, inductance parameters can be set to conventional criteria value, facilitate production and buying.
Refer again to Fig. 4 a, near 3GHz high frequency, curve S2 ascensional range is small, and curve S1 ascensional range is big, this be by
Big inductance value inductance self-resonant frequency in the filter of pure lamped element is lower, is easy to appear resonance near 3GHz high frequency,
And the distance between inductance and inductance are relatively close, are easy to appear mutual inductance phenomenon, cause the filter of pure lamped element prime and
Occur signal coupling between rear class, further reduced and filter out performance, therefore constituted using microstrip line and discrete component inductance
The filtering performance of filter is better than the filter using pure lamped element.
It refer again to Fig. 4 a, when the frequency of signal to be filtered is more than certain frequency value, the induction reactance of each inductance is 0nH,
I.e. each induction reactance is equivalent to impedance.
In each embodiment of the present invention, the first microstrip line, the second microstrip line, third microstrip line, the 4th microstrip line, the 5th
The width of microstrip line and the 6th microstrip line is 0.01 inch, and length is 0.1 inch.Using the microstrip line of the size, have
High induction factor Q value.Designer can also voluntarily select the size of each microstrip line according to the design needs.
Embodiment five
Referring to FIG. 5, Fig. 5 is the structural schematic diagram for a kind of electronic equipment that the embodiment of the present invention five provides.Such as Fig. 5 institute
Show, which includes antenna 501, filter 502 and amplifying circuit 503.
In embodiments of the present invention, electronic equipment can be broadcast for set-top box, display panel, television set, router, multimedia
Put equipment and other electronic equipments.
In embodiments of the present invention, antenna 501 receives and emits wireless signal, converts to the wireless signal, to filter
502 feed-in of wave device handles signal, wherein the processing signal includes low frequency signal and high-frequency signal.Antenna 501 includes antenna body
And it is connected to the feeder line on antenna body, designer selects the structure of antenna body to design, herein need not according to operation purpose
It repeats.
In the present embodiment, filter 502 and antenna 501 connect, for filtering out the high-frequency signal from 501 feed-in of antenna,
Filtering signal is exported, to reduce the ripple factor of electronic equipment, improves the reliability of signal transmission.
In the present embodiment, amplifying circuit 503 and filter 502 connect, and are used for amplified filtered signal.Amplifying circuit 503
Weaker filtering signal can be amplified, so that follow-up system handles the filtering signal.Such as follow-up system is view
The amplified filtering signal is carried out analog-to-digital conversion and processing by display system chip, video system chip.Follow-up system can be with
For other application circuit, such as decoding chip.The content that designer is instructed and guided according to embodiments of the present invention, in conjunction with operation purpose,
Voluntarily select the processing circuit of the filtering signal after wave filter filters out.
Further, which includes first capacitor, the first microstrip line, the first inductance and the second microstrip line, the
One end of one microstrip line is connected with one end of first capacitor, and one end of the first inductance is connected with the other end of the first microstrip line, the
One end of two microstrip lines is connected with the other end of the first inductance, and the other end of the second microstrip line and the other end of first capacitor connect
It connects.
Further, which further includes the second capacitor and third capacitor, and one end of the second capacitor is respectively with
One end of one microstrip line is connected with one end of first capacitor, one end of the second capacitor ground connection, and one end of third capacitor is respectively with the
The other end of two microstrip lines is connected with the other end of first capacitor.
Further, the filter 52 further include the 4th capacitor, third microstrip line, the second inductance, the 4th microstrip line and
5th capacitor, one end of third microstrip line are connect with one end of one end of the 4th capacitor and third capacitor respectively, the second inductance
One end is connected with the other end of third microstrip line, and one end of the 4th microstrip line is connected with the other end of the second inductance, the 5th capacitor
One end connect respectively with the other end of the other end of the 4th microstrip line and the 4th capacitor, the other end of the 5th capacitor ground connection.
Further, the filter 502 further include the 6th capacitor, the 5th microstrip line, third inductance, the 6th microstrip line and
One end of 7th capacitor, the 5th microstrip line is connect with one end of one end of the 6th capacitor and the 5th capacitor respectively, third inductance
One end is connected with the other end of the 5th microstrip line, and one end of the 6th microstrip line is connected with the other end of third inductance, the 7th capacitor
One end connect respectively with the other end of the other end of the 6th microstrip line and the 6th capacitor, the other end of the 7th capacitor ground connection.
In embodiments of the present invention, it is used by using microstrip line and discrete component inductance mixed, to replace simple electricity
Sense, 1.1GHz at, filtering amplitude reach -49dB, close to ideal filter at 1.1GHz filtered amplitude for -
50dB.On the one hand, the high-frequency effects of big inductance are overcome, to improve the quality factor of inductance and reduce with interior Insertion Loss；It is another
Aspect also has the flexibility of debugging, for example, designer can adjust microstrip line to random length, makes discrete component inductance
Using conventional inductance value inductance, to reduce production cost and delivery cycle.
In the present embodiment, the first microstrip line, the second microstrip line, third microstrip line, the 4th microstrip line, the 5th microstrip line with
And the 6th microstrip line width be 0.01 inch, length be 0.1 inch.Using the microstrip line of the size, with high inductance because
Number Q value.Designer can also voluntarily select the size of each microstrip line according to the design needs.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (10)
1. a kind of filter characterized by comprising
First capacitor；
One end of first microstrip line, first microstrip line is connected with one end of the first capacitor；
First inductance, one end of first inductance are connected with the other end of first microstrip line；
Second microstrip line, one end of second microstrip line are connected with the other end of first inductance, second microstrip line
The other end connected with the other end of the first capacitor.
2. filter according to claim 1, which is characterized in that the filter further include:
Second capacitor, one end of second capacitor are connect with one end of first microstrip line, one end of second capacitor
It is also connect with one end of the first capacitor, the other end ground connection of second capacitor；
Third capacitor, one end of the third capacitor are connect with the other end of second microstrip line, and the one of the third capacitor
End is also connect with the other end of the first capacitor, the other end ground connection of the third capacitor.
3. filter according to claim 2, which is characterized in that the filter further include:
4th capacitor；
Third microstrip line, one end of the third microstrip line respectively with one end of the 4th capacitor and the third capacitor one
End connection；
Second inductance, one end of second inductance are connected with the other end of the third microstrip line；
One end of 4th microstrip line, the 4th microstrip line is connected with the other end of second inductance；
5th capacitor, one end of the 5th capacitor are another with the other end of the 4th microstrip line and the 4th capacitor respectively
One end connection, the other end ground connection of the 5th capacitor.
4. filter according to claim 3, which is characterized in that the filter further include:
6th capacitor；
5th microstrip line, one end of the 5th microstrip line respectively with one end of the 6th capacitor and the 5th capacitor one
End connection；
Third inductance, one end of the third inductance are connected with the other end of the 5th microstrip line；
One end of 6th microstrip line, the 6th microstrip line is connected with the other end of the third inductance；
7th capacitor, one end of the 7th capacitor are another with the other end of the 6th microstrip line and the 6th capacitor respectively
One end connection, the other end ground connection of the 7th capacitor.
5. filter according to claim 4, which is characterized in that first microstrip line, second microstrip line, described
Third microstrip line, the 4th microstrip line, the 5th microstrip line and the 6th microstrip line width be 0.01 inch, it is long
Degree is 0.1 inch.
6. a kind of electronic equipment characterized by comprising
Antenna, for receiving and emitting wireless signal；
Filter is connected with the antenna, for filtering out the high-frequency signal from the antenna feed-in, exports filtering signal；
Amplifying circuit is connected with the filter, for amplifying the filtering signal；
Wherein, the filter includes:
First capacitor；
One end of first microstrip line, first microstrip line is connected with one end of the first capacitor；
First inductance, one end of first inductance are connected with the other end of first microstrip line；
Second microstrip line, one end of second microstrip line are connected with the other end of first inductance, second microstrip line
The other end connected with the other end of the first capacitor.
7. electronic equipment according to claim 6, which is characterized in that the filter further include:
Second capacitor, one end of second capacitor are connect with one end of first microstrip line, one end of second capacitor
It is also connect with one end of the first capacitor, the other end ground connection of second capacitor；
Third capacitor, one end of the third capacitor are connect with the other end of second microstrip line, and the one of the third capacitor
End is also connect with the other end of the first capacitor, the other end ground connection of the third capacitor.
8. electronic equipment according to claim 7, which is characterized in that the filter further include:
4th capacitor；
Third microstrip line, one end of the third microstrip line respectively with one end of the 4th capacitor and the third capacitor one
End connection；
Second inductance, one end of second inductance are connected with the other end of the third microstrip line；
One end of 4th microstrip line, the 4th microstrip line is connected with the other end of second inductance；
5th capacitor, one end of the 5th capacitor are another with the other end of the 4th microstrip line and the 4th capacitor respectively
One end connection, the other end ground connection of the 5th capacitor.
9. electronic equipment according to claim 8, which is characterized in that the filter further include:
6th capacitor；
5th microstrip line, one end of the 5th microstrip line respectively with one end of the 6th capacitor and the 5th capacitor one
End connection；
Third inductance, one end of the third inductance are connected with the other end of the 5th microstrip line；
One end of 6th microstrip line, the 6th microstrip line is connected with the other end of the third inductance；
7th capacitor, one end of the 7th capacitor are another with the other end of the 6th microstrip line and the 6th capacitor respectively
One end connection, the other end ground connection of the 7th capacitor.
10. electronic equipment according to claim 9, which is characterized in that first microstrip line, second microstrip line,
The third microstrip line, the 4th microstrip line, the 5th microstrip line and the 6th microstrip line width be 0.01 English
Very little, length is 0.1 inch.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610502817.8A CN106209008B (en) | 2016-06-30 | 2016-06-30 | A kind of filter and electronic equipment |
| PCT/CN2017/083454 WO2018000939A1 (en) | 2016-06-30 | 2017-05-08 | Filter and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610502817.8A CN106209008B (en) | 2016-06-30 | 2016-06-30 | A kind of filter and electronic equipment |
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| CN106209008A CN106209008A (en) | 2016-12-07 |
| CN106209008B true CN106209008B (en) | 2019-02-26 |
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| CN201610502817.8A Active CN106209008B (en) | 2016-06-30 | 2016-06-30 | A kind of filter and electronic equipment |
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| WO (1) | WO2018000939A1 (en) |
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| CN106209008B (en) * | 2016-06-30 | 2019-02-26 | 深圳市九洲电器有限公司 | A kind of filter and electronic equipment |
| CN115799781B (en) * | 2022-11-16 | 2024-02-02 | 宜确半导体（苏州）有限公司 | Coupled line band-pass filter |
| CN117391019B (en) * | 2023-10-18 | 2024-03-22 | 广州市德珑电子器件有限公司 | Simulation test method, device, equipment and medium for EMI power filter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5604375A (en) * | 1994-02-28 | 1997-02-18 | Sumitomo Electric Industries, Ltd. | Superconducting active lumped component for microwave device application |
| CN103606724A (en) * | 2013-11-25 | 2014-02-26 | 海能达通信股份有限公司 | Power device and micro-strip filter thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09214202A (en) * | 1996-01-31 | 1997-08-15 | Sumitomo Kinzoku Electro Device:Kk | Dielectric filter |
| CN101170206B (en) * | 2007-11-23 | 2010-09-01 | 中兴通讯股份有限公司 | A frequency band adjustable filter and its realization method |
| CN201319399Y (en) * | 2008-12-22 | 2009-09-30 | 建汉科技股份有限公司 | Small scale low-pass filter |
| CN102751960B (en) * | 2012-05-07 | 2015-08-26 | 摩比天线技术（深圳）有限公司 | A kind of radio frequency low pass filter being applied to LTE |
| CN104241745B (en) * | 2014-09-05 | 2017-12-01 | 中国科学院微电子研究所 | Micro-strip filter |
| CN106209008B (en) * | 2016-06-30 | 2019-02-26 | 深圳市九洲电器有限公司 | A kind of filter and electronic equipment |
-
2016
- 2016-06-30 CN CN201610502817.8A patent/CN106209008B/en active Active
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2017
- 2017-05-08 WO PCT/CN2017/083454 patent/WO2018000939A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5604375A (en) * | 1994-02-28 | 1997-02-18 | Sumitomo Electric Industries, Ltd. | Superconducting active lumped component for microwave device application |
| CN103606724A (en) * | 2013-11-25 | 2014-02-26 | 海能达通信股份有限公司 | Power device and micro-strip filter thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018000939A1 (en) | 2018-01-04 |
| CN106209008A (en) | 2016-12-07 |
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