CN109687072A - Filter - Google Patents
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- Publication number
- CN109687072A CN109687072A CN201910027304.XA CN201910027304A CN109687072A CN 109687072 A CN109687072 A CN 109687072A CN 201910027304 A CN201910027304 A CN 201910027304A CN 109687072 A CN109687072 A CN 109687072A
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- Prior art keywords
- filter
- ceramic body
- band
- hole
- resonant cavities
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/212—Frequency-selective devices, e.g. filters suppressing or attenuating harmonic frequencies
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention provides a kind of filter comprising: ceramic body, the metal layer for being set to ceramic body inner and outer surfaces；The one side of ceramic body has multiple resonant cavities, the hole for capacity coupled perforation ceramic body is provided between two resonant cavities in multiple resonant cavities, the upper end-face edge and/or lower edge of hole are provided with the adjusting band of annular, adjust not set metal layer at band, the first performance parameter that band defines filter with the one side distance h1 of ceramic body is adjusted, the aperture D1 of hole defines the second performance parameter of filter.Filter of the invention between resonant cavity by opening up hole, realize the capacitive coupling performance of filter, band is adjusted by making on hole simultaneously, effectively the performances such as the capacitive coupling size of filter, Out-of-band rejection, distal end inhibition are adjusted, the zero balance of improvement filter passband two sides that especially can be fabulous, sufficiently meets actual use demand.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of filters applied to the communications field.
Background technique
Dielectric waveguide filter is a kind of microwave filter for obtaining frequency-selecting effect by multistage coupling using dielectric resonant chamber
Wave device.The surface of dielectric waveguide filter is covered with metal layer, and electromagnetic wave is limited in medium, forms standing wave oscillation.Medium
The major advantage of waveguide filter is that power capacity is big, and insertion loss is low, and still, existing dielectric filter realizes capacitive coupling
It is extremely difficult, and have spuious influence to left and right distal end, so limit the application of dielectric filter.Therefore, for above-mentioned requirements,
It is necessary to propose further solution.
Summary of the invention
The present invention is intended to provide a kind of filter, to overcome the deficiencies in the prior art.
In order to solve the above technical problems, the technical scheme is that
A kind of filter comprising: ceramic body, the metal layer for being set to the ceramic body inner and outer surfaces；
The one side of the ceramic body has multiple resonant cavities, is arranged between two resonant cavities in multiple resonant cavities useful
In the hole of the capacity coupled perforation ceramic body, the upper end-face edge and/or lower edge of described hole are provided with annular
Adjusting band, adjusting band locates the not set metal layer, the one side distance h1 of the adjusting band and the ceramic body
The first performance parameter of the filter is defined, the aperture D1 of described hole defines the second performance parameter of the filter.
As the improvement of filter of the invention, described hole is located at the midpoint of line between two resonant cavities.
As the improvement of filter of the invention, the cross sectional shape of described hole are as follows: round, ellipse, polygon or
One of abnormity.
As the improvement of filter of the invention, the adjusting band is by described hole upper end-face edge and/or lower edge institute
It is limited described in the annular region of exposing.
As the improvement of filter of the invention, the adjusting band is by described hole upper end-face edge and/or lower edge institute
The annular groove exposed in annular region is limited.
As the improvement of filter of the invention, the depth h2 of the annular groove defines the third performance of the filter
The diameter D2 of parameter, the annular groove defines the 4th performance parameter of the filter.
As the improvement of filter of the invention, the resonant cavity is six, and six resonant cavities are arranged in the form of an array
In the one side of the ceramic body.
As the improvement of filter of the invention, in three column resonant cavities it is adjacent two column each resonant cavities between by first every
It is isolated from chamber, each resonant cavity of adjacent two column is isolated with remaining column resonant cavity by the second separate cavities.
As the improvement of filter of the invention, described hole is located between remaining two resonant cavity of a column.
As the improvement of filter of the invention, the metal layer is silver coating or copper plate.
Compared with prior art, the beneficial effects of the present invention are: filter of the invention between resonant cavity by opening up
Hole realizes the capacitive coupling performance of filter, while adjusting band by making on hole, effectively to the electricity of filter
Hold coupling size, Out-of-band rejection, distal end inhibit etc., and performances are adjusted, improvement filter passband two sides that especially can be fabulous
Zero balance sufficiently meets actual use demand.In addition, filter of the invention is from physically, it is easier to machine
Add, casting forming, technique is simpler, more conducively produces.
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 some embodiments recorded in invention, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the top view of filter of the invention；
Fig. 2 is the bottom view of filter of the invention；
Fig. 3 is the enlarged section in the direction Figure 1A-A in an embodiment, at this point, adjusting band to be set to end edge on hole
The annular region of edge；
Fig. 4 be another embodiment in the direction Figure 1A-A enlarged section, at this point, adjust band for be set on hole,
The annular region of lower edge；
Fig. 5 be another embodiment in the direction Figure 1A-A enlarged section, at this point, adjust band for be set on hole,
The annular groove of lower edge；
Fig. 6 is the S parameter curve graph of filter of the invention；
It should be noted that the direction A-A is tilted drafting for the direction perpendicular to paper for the convenience of drafting.
Specific embodiment
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 description, 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.
As shown in Figure 1, 2, the present invention provides a kind of filter comprising: ceramic body 1 is set to the ceramic body 1
The metal layer 2 of inner and outer surfaces.
The one side of the ceramic body 1 has multiple resonant cavities 11, and the resonant cavity 11 is to be set to the ceramic body 1
Blind hole on one side, multiple resonant cavities 11 realize frequency-selective filtering by multistage coupling.Due to belonging on the filtering principle of filter
The prior art is not described in detail herein.
In one embodiment, the resonant cavity 11 is six, at this point, six resonant cavities 11 are arranged in the form of an array
In the one side of the ceramic body 1.In present embodiment, pass through between each resonant cavity 11 of adjacent two column in three column resonant cavities 11
First separate cavities 12 are isolated.First separate cavities 12 are cross-shaped structure, and four resonant cavities 11 are distributed in respectively by described the
In four regions that one separate cavities 12 are divided.Each resonant cavities 11 and remaining column resonant cavity 11 of adjacent two column pass through the
Two separate cavities 13 are isolated.Second separate cavities 13 are substantially in T shape.
As in Figure 3-5, it is provided between two resonant cavities 11 in multiple resonant cavities 11 for capacity coupled perforation
The hole 14 of the ceramic body 1, the hole 14 is while realizing capacitive coupling, compared to blind hole is opened up, also has processing
Convenient advantage.Because when opening up blind hole, there is precision to the distance between surface of distance from bottom ceramic body 1 of blind hole
Requirement, which significantly improves the technology difficulty and cost of device, and opens up through-hole and then overcome the problem.It is excellent
Selection of land, described hole 14 are located at the midpoint of line between two resonant cavities 11.When multiple resonant cavities 11 are six, and with battle array
When column form is arranged, described hole 14 is located between remaining two resonant cavity 11 of a column.In addition, the cross sectional shape of described hole 14
It can be with are as follows: one of round, ellipse, polygon or abnormity.Preferably, the cross sectional shape of described hole 14 is circle.
The performances such as capacitive coupling size, Out-of-band rejection, distal end inhibition are adjusted in order to realize, 14 upper end of described hole
Edge and/or lower edge are provided with the adjusting band 141 of annular, the not set metal layer 2 at the adjusting band 141.When in hole
When adjusting band 141 is arranged in the upper end-face edge and lower edge in hole 14 simultaneously, adjusting band 141 compared to the setting of edge at one end has more
Good capacitive coupling effect.
The width h1 for adjusting band 141 defines the first performance parameter of the filter, the adjusting band 141 with it is described
The distance h1 of the one side of ceramic body 1 defines the first performance parameter of the filter, and the aperture D1 of described hole 14 defines institute
State the second performance parameter of filter.
To adjust the band 141 and one side distance h1 of the ceramic body 1 or the aperture D1 ruler of hole 14 by changing
Very little parameter is, it can be achieved that carry out adaptability adjusting to performances such as capacitive coupling size, Out-of-band rejection, distal end inhibition, so that this hair
Bright filter meets the use demand under corresponding conditions.
In order to verify between the performances such as the first, second performance parameter and capacitive coupling size, Out-of-band rejection, distal end inhibition
Correlation characterizes the curve graph of the S parameter of performance of filter of the present invention as shown in fig. 6, establishing under different frequency, wherein S ginseng
Number, that is, scattering parameter.It is an important parameter in microwave transmission.
It will be appreciated from fig. 6 that occurring the A point wave crest and B point wave crest of left and right distribution in L-curve, show filtering of the invention
Device has capacitive coupling performance, while the difference in height of A point wave crest and B point wave crest reflects the influence for Out-of-band rejection.In addition,
Have also appeared C point wave crest in L-curve, C point wave crest is the far-end harmonic, compare similar capacitive coupling, the harmonic wave point of this patent from
Passband is farther, and degree of suppression is bigger, to show that filter of the invention can produce characteristic and preferably distally inhibit.
Again as shown in figure 3, in one embodiment, 14 upper end-face edge of described hole is provided with the adjusting band of annular
141.At this point, described adjust limits described in the annular region that band 141 is exposed by band by 14 upper end-face edge of described hole.Adjust band
141 be the length of hole 14 with the one side distance h1 of the ceramic body 1.In addition, in present embodiment, the adjusting band
141 are process by milling cutter.When processing, control milling cutter, which mills, adjusts the corresponding metal layer 2 in 141 surface of band, makes to adjust band 141
The region at place exposes.
Again as shown in figure 4, in another alternative embodiment, 14 upper end-face edge of described hole and lower edge are set
It is equipped with the adjusting band 141 of annular.The annulus for adjusting band 141 and being exposed by 14 upper end-face edge of described hole and lower edge
It is limited described in domain.In present embodiment, the processing method of the adjusting band 141 is equally process by milling cutter, no longer heavy herein
It is multiple to introduce.
Again as shown in figure 5, in another alternative embodiment, 14 upper end-face edge of described hole and lower edge are set
It is equipped with the adjusting band 141 of annular.The adjusting band 141 is by 14 upper end-face edge of described hole and the exposed annular region of lower edge
On annular groove limited.In present embodiment, which is equally process by milling cutter.When processing, control milling
After knife first mills the corresponding metal layer 2 in adjusting 141 surface of band, continuing Milling Machining, so that forming ring in the annular region exposed
The groove structure of shape, the annular region that annular groove structure occupies exposing is some or all of, when occupying part, the ring of exposing
Step structure is formed between shape region and the groove structure of annular.At this point, can also be realized pair by the height for adjusting step structure
The adjusting of capacitive coupling size.
In above-mentioned alternate embodiments, by forming the groove structure of annular, so that the depth h2 of the annular groove is fixed
The third performance parameter of the justice filter, the diameter D2 of the annular groove define the 4th performance parameter of the filter.
To which the first, second, third, fourth performance parameter can together be adjusted the performance of filter, optimize.
The another side of the ceramic body 1 is additionally provided with input port 15 and input port 16.
The metal layer 2 for realizing filter of the present invention electric property, it is preferable that the metal layer 2 can for plating
Silver layer or copper plate.In addition, the metal layer 2 can also be substituted by the layer structure of other conductive energy.
In conclusion filter of the invention realizes the capacitor coupling of filter by opening up hole between resonant cavity
Performance is closed, while adjusting band by making on hole, effectively to the capacitive coupling size of filter, Out-of-band rejection, distal end
The performances such as inhibition are adjusted, and the zero balance of improvement filter passband two sides that especially can be fabulous sufficiently meets reality
The use demand on border.In addition, filter of the invention is from physically, it is easier to machine adds, casting forming, and technique is simpler,
More conducively produce.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (10)
1. a kind of filter, which is characterized in that the filter includes: ceramic body, is set to the inside and outside table of the ceramic body
The metal layer in face；
The one side of the ceramic body has multiple resonant cavities, is provided between two resonant cavities in multiple resonant cavities for electricity
Hold the hole of the perforation ceramic body of coupling, the upper end-face edge and/or lower edge of described hole are provided with the tune of annular
Band, the not set metal layer at the adjusting band are saved, the one side distance h1 for adjusting band and the ceramic body is defined
The aperture D1 of the first performance parameter of the filter, described hole defines the second performance parameter of the filter.
2. filter according to claim 1, which is characterized in that described hole is located between two resonant cavities in line
Point position.
3. filter according to claim 1, which is characterized in that the cross sectional shape of described hole are as follows: round, ellipse,
One of polygon or abnormity.
4. filter according to claim 1, which is characterized in that the adjusting band by described hole upper end-face edge and/or
Restriction described in the annular region that lower edge is exposed.
5. filter according to claim 1, which is characterized in that the adjusting band by described hole upper end-face edge and/or
Annular groove in the exposed annular region of lower edge is limited.
6. filter according to claim 5, which is characterized in that the depth h2 of the annular groove defines the filter
Third performance parameter, the diameter D2 of the annular groove defines the 4th performance parameter of the filter.
7. filter according to claim 1, which is characterized in that the resonant cavity is six, and six resonant cavities are with array
Form is arranged in the one side of the ceramic body.
8. filter according to claim 7, which is characterized in that in three column resonant cavities between each resonant cavity of adjacent two column
Be isolated by the first separate cavities, it is described it is adjacent two column each resonant cavities and remaining column resonant cavity by the second separate cavities institute every
From.
9. filter according to claim 8, which is characterized in that described hole be located at remaining two resonant cavity of a column it
Between.
10. filter according to claim 1, which is characterized in that the metal layer is silver coating or copper plate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910027304.XA CN109687072B (en) | 2019-01-11 | 2019-01-11 | Filter with a filter element having a plurality of filter elements |
| PCT/CN2019/071863 WO2020143070A1 (en) | 2019-01-11 | 2019-01-16 | Filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910027304.XA CN109687072B (en) | 2019-01-11 | 2019-01-11 | Filter with a filter element having a plurality of filter elements |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109687072A true CN109687072A (en) | 2019-04-26 |
| CN109687072B CN109687072B (en) | 2020-04-21 |
Family
ID=66192248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910027304.XA Active CN109687072B (en) | 2019-01-11 | 2019-01-11 | Filter with a filter element having a plurality of filter elements |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109687072B (en) |
| WO (1) | WO2020143070A1 (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048200A (en) * | 2019-05-14 | 2019-07-23 | 京信通信技术(广州)有限公司 | Dielectric waveguide filter and its capacitive coupling structure |
| CN110098456A (en) * | 2019-05-24 | 2019-08-06 | 武汉凡谷电子技术股份有限公司 | A kind of capacitive coupling device and the filter containing the capacitive coupling device |
| CN110148819A (en) * | 2019-06-20 | 2019-08-20 | 京信通信技术(广州)有限公司 | The capacitive coupling structure and dielectric waveguide filter of dielectric waveguide filter |
| CN110265754A (en) * | 2019-07-16 | 2019-09-20 | 深圳市国人射频通信有限公司 | A kind of dielectric waveguide filter |
| CN110380164A (en) * | 2019-07-11 | 2019-10-25 | 摩比科技（深圳）有限公司 | Ceramic dielectric waveguide filter |
| CN110380165A (en) * | 2019-08-16 | 2019-10-25 | 苏州艾福电子通讯有限公司 | Dielectric filter |
| CN110400996A (en) * | 2019-07-03 | 2019-11-01 | 广东通宇通讯股份有限公司 | A kind of ceramic dielectric filling waveguide filter |
| CN110444842A (en) * | 2019-08-16 | 2019-11-12 | 苏州艾福电子通讯有限公司 | Microwave filter |
| CN110676542A (en) * | 2019-09-05 | 2020-01-10 | 京信通信技术(广州)有限公司 | Port coupling structure, filter and radio frequency assembly |
| CN110729535A (en) * | 2019-10-21 | 2020-01-24 | 摩比科技（深圳）有限公司 | Capacitive coupling structure of dielectric waveguide filter and dielectric waveguide filter |
| WO2020143814A1 (en) * | 2019-01-11 | 2020-07-16 | 华为技术有限公司 | Filter |
| CN111446525A (en) * | 2020-02-19 | 2020-07-24 | 深圳市大富科技股份有限公司 | Dielectric resonator, dielectric filter, transceiver and base station |
| WO2021169232A1 (en) * | 2020-02-26 | 2021-09-02 | 江苏灿勤科技股份有限公司 | Filter and manufacturing method therefor |
| US11335984B2 (en) | 2020-04-16 | 2022-05-17 | Kunshan Luxshare Rf Technology Co., Ltd. | Dielectric waveguide filter |
| CN114762183A (en) * | 2019-12-11 | 2022-07-15 | Ace技术株式会社 | Ceramic waveguide filter and method for manufacturing the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020143814A1 (en) * | 2019-01-11 | 2020-07-16 | 华为技术有限公司 | Filter |
| WO2020228198A1 (en) * | 2019-05-14 | 2020-11-19 | 京信通信技术(广州)有限公司 | Dielectric waveguide filter and capacitive-coupling structure thereof |
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| CN110048200B (en) * | 2019-05-14 | 2024-03-26 | 京信通信技术(广州)有限公司 | Dielectric waveguide filter and capacitive coupling structure thereof |
| CN110098456A (en) * | 2019-05-24 | 2019-08-06 | 武汉凡谷电子技术股份有限公司 | A kind of capacitive coupling device and the filter containing the capacitive coupling device |
| CN110148819A (en) * | 2019-06-20 | 2019-08-20 | 京信通信技术(广州)有限公司 | The capacitive coupling structure and dielectric waveguide filter of dielectric waveguide filter |
| CN110148819B (en) * | 2019-06-20 | 2024-03-26 | 京信通信技术(广州)有限公司 | Capacitive coupling structure of dielectric waveguide filter and dielectric waveguide filter |
| WO2020252946A1 (en) * | 2019-06-20 | 2020-12-24 | 京信通信技术(广州)有限公司 | Capacitive coupling structure for dielectric waveguide filter and dielectric waveguide filter |
| CN110400996A (en) * | 2019-07-03 | 2019-11-01 | 广东通宇通讯股份有限公司 | A kind of ceramic dielectric filling waveguide filter |
| CN110380164A (en) * | 2019-07-11 | 2019-10-25 | 摩比科技（深圳）有限公司 | Ceramic dielectric waveguide filter |
| CN110380164B (en) * | 2019-07-11 | 2024-05-17 | 摩比科技（深圳）有限公司 | Ceramic dielectric waveguide filter |
| CN110265754A (en) * | 2019-07-16 | 2019-09-20 | 深圳市国人射频通信有限公司 | A kind of dielectric waveguide filter |
| CN110380165A (en) * | 2019-08-16 | 2019-10-25 | 苏州艾福电子通讯有限公司 | Dielectric filter |
| CN110444842A (en) * | 2019-08-16 | 2019-11-12 | 苏州艾福电子通讯有限公司 | Microwave filter |
| CN110676542A (en) * | 2019-09-05 | 2020-01-10 | 京信通信技术(广州)有限公司 | Port coupling structure, filter and radio frequency assembly |
| CN110729535A (en) * | 2019-10-21 | 2020-01-24 | 摩比科技（深圳）有限公司 | Capacitive coupling structure of dielectric waveguide filter and dielectric waveguide filter |
| CN114762183A (en) * | 2019-12-11 | 2022-07-15 | Ace技术株式会社 | Ceramic waveguide filter and method for manufacturing the same |
| CN111446525A (en) * | 2020-02-19 | 2020-07-24 | 深圳市大富科技股份有限公司 | Dielectric resonator, dielectric filter, transceiver and base station |
| CN111446525B (en) * | 2020-02-19 | 2022-03-11 | 深圳市大富科技股份有限公司 | Dielectric resonator, dielectric filter, transceiver and base station |
| WO2021169232A1 (en) * | 2020-02-26 | 2021-09-02 | 江苏灿勤科技股份有限公司 | Filter and manufacturing method therefor |
| US11335984B2 (en) | 2020-04-16 | 2022-05-17 | Kunshan Luxshare Rf Technology Co., Ltd. | Dielectric waveguide filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109687072B (en) | 2020-04-21 |
| WO2020143070A1 (en) | 2020-07-16 |
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