CN110137645A - A kind of dielectric waveguide filter - Google Patents
A kind of dielectric waveguide filter Download PDFInfo
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- CN110137645A CN110137645A CN201910584445.1A CN201910584445A CN110137645A CN 110137645 A CN110137645 A CN 110137645A CN 201910584445 A CN201910584445 A CN 201910584445A CN 110137645 A CN110137645 A CN 110137645A
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- resonator
- blind hole
- conductive pattern
- coupled structure
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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
- H01P1/212—Frequency-selective devices, e.g. filters suppressing or attenuating harmonic frequencies
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Abstract
The present invention provides a kind of dielectric waveguide filters, including at least two resonators, it is coupled between resonator by coupled structure, coupled structure includes conductive pattern and the blind hole that connect with conductor image, conductive pattern is between resonator, blind hole is located at resonator inside, so as to pass through the size for adjusting conductive pattern and/or blind hole, adjust the stiffness of coupling of coupled structure, and then only need not adjust the stiffness of coupling of coupled structure by adjusting the size of conductive pattern, and then can improve because pattern coupling amount is excessive and the case where proximal end causes harmonic wave.Also, by the size for neatly adjusting conductive pattern and/or blind hole, the position of harmonic wave can be significantly adjusted, so that the range of harmonic wave adjustment is larger.
Description
Technical field
The present invention relates to wave filter technology fields, more specifically to a kind of dielectric waveguide filter.
Background technique
With the development of communication system, the requirement to filter is continuously improved.Cavity size and weight demands are limited to, are filtered
The miniaturization of wave device, lightweight are increasingly becoming a kind of trend.Utilize the high dielectric constant of dielectric material and the high q-factor of material, medium
Waveguide filter can substantially reduce product size and weight, also have many advantages, such as that temperature drift is small.
In existing dielectric waveguide filter, two layers or two layers or more of resonator structure, which needs to be coupled with pattern, to be carried out
The transmitting of energy.As shown in Figure 1,101 and 102 be respectively the resonator of dielectric waveguide filter, resonator 101 and resonator
102 by pattern 103, pattern 104 be connected, by adjust pattern 103, pattern 104 diameter, adjust resonator 101 and 102 it
Between stiffness of coupling.In general, coupling amount is bigger, and pattern is bigger, and harmonic wave can more press down proximal end harmonic wave closer to channel
System.
But found in actually research and development and production: if the coupling amount between 1, two resonator is excessively big, it is easy to
Proximal end causes harmonic wave, causes proximal end Out-of-band rejection poor, and serious or even influence transmission zero makes Out-of-band rejection not be able to satisfy finger
Mark requires.2, in order to avoid pattern harmonic wave is too close to passband, the position of harmonic wave can only be moved by changing ring width, still,
Its position that can only move harmonic wave by a small margin, so that the limitation of harmonic wave adjustment is larger.
Summary of the invention
In view of this, the present invention provides a kind of dielectric waveguide filter, to solve in existing dielectric waveguide filter
The above problem caused by being coupled due to pattern.
To achieve the above object, the invention provides the following technical scheme:
A kind of dielectric waveguide filter, including at least two resonators pass through coupled structure between the resonator and couple；
The coupled structure includes conductive pattern and the blind hole that connect with the conductive pattern, and the conductive pattern is located at institute
It states between resonator, the blind hole is located at the resonator inside, by adjusting the conductive pattern and/or the blind hole
Size adjusts the stiffness of coupling of the coupled structure.
Optionally, at least two resonator includes the first resonator and the second resonator, first resonator position
At the top of second resonator, first resonator and second resonator are coupled by the first coupled structure；
First coupled structure includes the first conductive pattern and the first blind hole connecting with first conductive pattern,
Two conductive patterns and the second blind hole being connect with second conductive pattern, first conductive pattern and the second conductor figure
For case between first resonator and second resonator, first blind hole is located at first resonator inside,
Second blind hole is located at second resonator inside.
Optionally, at least two resonator further includes third resonator and the 4th resonator, the 4th resonator
Positioned at the third resonator bottom, second resonator and the 4th resonator are coupled by the second coupled structure, institute
It states the first resonator and the 4th resonator is coupled by third coupled structure；
Second coupled structure and the third coupled structure include through-hole.
Optionally, the conductive pattern is circular pattern, and the projection of the blind hole is wrapped up in the projection of the circular pattern.
Optionally, the aperture of the blind hole is 2mm~3mm.
Optionally, the depth of the blind hole is less than or equal to 1mm.
Compared with prior art, the technical scheme provided by the invention has the following advantages:
Dielectric waveguide filter provided by the present invention, including at least two resonators pass through coupling knot between resonator
Structure coupling, coupled structure include conductive pattern and the blind hole that connect with conductor image, and conductive pattern is between resonator, blind hole
Positioned at resonator inside, so as to which by the size for adjusting conductive pattern and/or blind hole, the coupling for adjusting coupled structure is strong
Degree, and then only need not adjust the stiffness of coupling of coupled structure by adjusting the size of conductive pattern, so can improve because
Pattern coupling amount is excessive and the case where proximal end causes harmonic wave.Also, pass through the ruler for neatly adjusting conductive pattern and/or blind hole
It is very little, the position of harmonic wave can be significantly adjusted, so that the range of harmonic wave adjustment is larger.
Detailed description of the invention
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 technical 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 a kind of existing the schematic diagram of the section structure of filter；
Fig. 2 is a kind of the schematic diagram of the section structure of filter provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of the section structure of another filter provided in an embodiment of the present invention；
Fig. 4 is the top view of the first resonator and the second resonator in filter shown in Fig. 3；
Fig. 5 is the top view of third resonator and the 4th resonator in filter shown in Fig. 3；
Fig. 6 is the harmonic diagram of filter shown in Fig. 3.
Specific embodiment
It is core of the invention thought above, to keep the above objects, features and advantages of the present invention more obvious easily
Understand, following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a kind of dielectric waveguide filters, as shown in Figure 2 or Figure 3, including at least two resonance
Device is coupled by coupled structure between resonator, and coupled structure includes conductive pattern and the blind hole that connect with conductive pattern, conductor
For pattern between resonator, blind hole is located at resonator inside, so as to pass through the ruler for adjusting conductive pattern and/or blind hole
It is very little, adjust the stiffness of coupling of coupled structure.
In one particular embodiment of the present invention, as shown in Fig. 2, at least two resonators include the first resonator 201
With the second resonator 202, the first resonator 201 is located at 202 top of the second resonator, the first resonator 201 and the second resonator
202 are coupled by the first coupled structure.
Wherein, which includes the first conductive pattern 205 and connect with the first conductive pattern 205 first blind
Hole 203, the second conductive pattern 206 and the second blind hole 204 being connect with the second conductive pattern 206, the first conductive pattern 205 and
Two conductive patterns 206 are between the first resonator 201 and the second resonator 202, also, the first conductive pattern 205 is located at the
One resonator, 201 bottom, the first blind hole 203 is located inside the first resonator 201, and the first blind hole 203 and the first resonator 201
First conductive pattern 205 of bottom connects, and the second conductive pattern 206 is located at 202 top of the second resonator, the second blind hole 204
Inside the second resonator 202, and the second blind hole 204 is connect with second conductive pattern 206 at 202 top of the second resonator.
Based on this, the first resonator 201 and the second resonator 202 can pass through the first conductive pattern 205, the second conductor figure
Case 206, the first blind hole 203 and the second blind hole 204 carry out the transmitting of energy, can not only pass through increased first blind hole, 203 He
Second blind hole 204 increases the coupling amount between the first resonator 201 and the second resonator 202, and can be by adjusting first
Conductive pattern 205, the first blind hole 203, the size of the second conductive pattern 206 and the second blind hole 204 adjust the first resonator 201
With the coupling amount between the second resonator 202, so as to avoid the excessive problem of the coupling amount of conductive pattern, and then can improve
Because pattern coupling amount is excessive and the case where proximal end causes harmonic wave.
Also, by the size for neatly adjusting conductive pattern and/or blind hole, it can significantly adjust the position of harmonic wave
It sets, so that the range of harmonic wave adjustment is larger.In addition, compared to the method for tradition optimization harmonic wave, optimization provided in an embodiment of the present invention
The method of harmonic wave, it is only necessary to add blind hole in patterned side, easy to operate, stability is good, can carry out large batch of production.
In one particular embodiment of the present invention, as shown in figure 3, at least two resonators include the first resonator 703,
Second resonator 702, third resonator 704 and the 4th resonator 701, the first resonator 703 are located at the second resonator 702 top
Portion, third resonator 704 are located at 701 top of the 4th resonator, the first resonator 703 and the setting of 704 same layer of third resonator, the
Two resonators 702 and the setting of 701 same layer of the 4th resonator, the first resonator 703 and the second resonator 702 pass through the first coupling knot
Structure coupling, the second resonator 702 and the 4th resonator 701 are coupled by the second coupled structure, and third resonator 704 and first is humorous
Vibration device 703 is coupled by third coupled structure.
As shown in Figure 4 and Figure 5, the second coupled structure includes through-hole 715 and 716, and third coupled structure includes 713 He of through-hole
714, that is to say, that the second resonator 702 and the 4th resonator 701 are coupled by through-hole 715 and 716,704 He of third resonator
First resonator 703 is coupled by through-hole 713 and 714.
As shown in figure 3, the first coupled structure include the first conductive pattern 709 and connect with the first conductive pattern 709
One blind hole 711, the second conductive pattern 710 and the second blind hole 712 being connect with the second conductive pattern 710, the first conductive pattern 709
And second conductive pattern 710 between the second resonator 702 and third resonator 703, the first blind hole 711 is located at the second resonance
Inside device 702, and the first blind hole 711 is connect with first conductive pattern 709 at 702 top of the second resonator, the second blind hole 712
Inside the first resonator 703, and the second blind hole 712 is connect with the second conductive pattern 710 of 703 bottom of the first resonator.
Certainly, the filter in the present embodiment further includes third blind hole 707, the 4th blind hole 708,705 and of the first connector
Second connector 706, a connector in the first connector 705 and the second connector 706 are input connector, another company
Connector is output connecting head, for realizing the connection of filter and pcb board etc..Also, the first connector 705 and the 4th resonator
Third blind hole 707 inside 701 connects, for realizing the transmitting with filter energy, the second connector by third blind hole 707
706 connect with the 4th blind hole 708 inside third resonator 704, for being realized and filter energy by the 4th blind hole 708
Transmitting.
Equally, in the present embodiment, the first resonator 703 and the second resonator 702 can by the first conductive pattern 709,
Second conductive pattern 710, the first blind hole 711 and the second blind hole 712 carry out the transmitting of energy, can not only pass through increased first
Blind hole 711 and the second blind hole 712 increase the coupling amount between the first resonator 703 and the second resonator 702, and can pass through
Adjust the first conductive pattern 709, the second conductive pattern 710, the first blind hole 711 and the second blind hole 712 size, adjust first humorous
The coupling amount shaken between device 703 and the second resonator 702, so as to avoid the excessive problem of the coupling amount of conductive pattern, in turn
Can improve because pattern coupling amount is excessive and the case where proximal end causes harmonic wave.
Also, by the size for neatly adjusting conductive pattern and/or blind hole, it can significantly adjust the position of harmonic wave
It sets, so that the range of harmonic wave adjustment is larger.As shown in fig. 6, the harmonic wave as caused by pattern has moved to 4.97GHz, improve
The effect of harmonic wave is clearly.In addition, compared to the method for tradition optimization harmonic wave, the side of optimization harmonic wave provided in an embodiment of the present invention
Method, it is only necessary to add blind hole in patterned side, easy to operate, stability is good, can carry out large batch of production.
Optionally, in the embodiment of the present invention, conductive pattern is circular pattern, also, circular pattern is on the resonator
Projection wrap up the projection of the blind hole on the resonator.As shown in figure 4, the first conductive pattern 709 is circular pattern, the
One blind hole 711 is blind round hole, the projection of projection the first blind hole 711 of package of the first conductive pattern 709, as shown in figure 5, second
Conductive pattern 710 is circular pattern, and the second blind hole 712 is blind round hole, and the second blind hole is wrapped up in the projection of the second conductive pattern 710
712 projection.
In the embodiment of the present invention, the coupling amount between resonator can be changed by changing aperture and the depth of blind hole,
Optionally, the aperture of blind hole is 2mm~3mm, and the depth of blind hole is less than or equal to 1mm.Certainly, the present invention is not limited to this,
In other embodiments, depth and the aperture of blind hole can be set according to the demand of practical application.
It should be noted that the conductive pattern in the embodiment of the present invention is the circular pattern that conductor material is formed, blind hole is
By the conductive through hole for crossing engraving or die forming.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.To the upper of the disclosed embodiments
It states bright, enables those skilled in the art to implement or use the present invention.Various modifications to these embodiments are to ability
Will be apparent for the professional technician in domain, the general principles defined herein can not depart from it is of the invention
In the case where spirit or scope, realize in other embodiments.Therefore, the present invention be not intended to be limited to it is shown in this article these
Embodiment, and it is to fit to the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. a kind of dielectric waveguide filter, which is characterized in that including at least two resonators, pass through coupling between the resonator
Structure Coupling；
The coupled structure includes conductive pattern and the blind hole that connect with the conductive pattern, and the conductive pattern is located at described humorous
It shakes between device, the blind hole is located at the resonator inside, to pass through the ruler for adjusting the conductive pattern and/or the blind hole
It is very little, adjust the stiffness of coupling of the coupled structure.
2. filter according to claim 1, which is characterized in that at least two resonator include the first resonator and
Second resonator, first resonator are located at the top of second resonator, first resonator and second resonance
Device is coupled by the first coupled structure；
First coupled structure includes the first conductive pattern and the first blind hole connecting with first conductive pattern, second leads
Body pattern and the second blind hole being connect with second conductive pattern, first conductive pattern and second conductive pattern position
Between first resonator and second resonator, first blind hole is located at first resonator inside, described
Second blind hole is located at second resonator inside.
3. filter according to claim 2, which is characterized in that at least two resonator further includes third resonator
With the 4th resonator, the 4th resonator is located at the third resonator bottom, second resonator and described 4th humorous
The device that shakes is coupled by the second coupled structure, and first resonator and the 4th resonator are coupled by third coupled structure；
Second coupled structure and the third coupled structure include through-hole.
4. described in any item filters according to claim 1~3, which is characterized in that the conductive pattern is circular pattern, institute
The projection of the blind hole is wrapped up in the projection for stating circular pattern.
5. filter according to claim 4, which is characterized in that the aperture of the blind hole is 2mm~3mm.
6. filter according to claim 5, which is characterized in that the depth of the blind hole is less than or equal to 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910584445.1A CN110137645B (en) | 2019-07-01 | 2019-07-01 | Dielectric waveguide filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910584445.1A CN110137645B (en) | 2019-07-01 | 2019-07-01 | Dielectric waveguide filter |
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| CN110137645A true CN110137645A (en) | 2019-08-16 |
| CN110137645B CN110137645B (en) | 2021-08-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111313133A (en) * | 2019-12-18 | 2020-06-19 | 武汉凡谷电子技术股份有限公司 | Double-layer filter and harmonic wave improving method |
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