CN110071350A - Dielectric filter - Google Patents
Dielectric filter Download PDFInfo
- Publication number
- CN110071350A CN110071350A CN201910434438.3A CN201910434438A CN110071350A CN 110071350 A CN110071350 A CN 110071350A CN 201910434438 A CN201910434438 A CN 201910434438A CN 110071350 A CN110071350 A CN 110071350A
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- Prior art keywords
- face
- metal layer
- rectangular block
- resonance
- open circuit
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Links
- 239000002184 metal Substances 0.000 claims abstract description 98
- 229910052751 metal Inorganic materials 0.000 claims abstract description 98
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 238000007373 indentation Methods 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims 1
- 238000003780 insertion Methods 0.000 abstract description 11
- 230000037431 insertion Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 description 13
- 238000010276 construction Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000001976 improved effect Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/2002—Dielectric waveguide filters
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention relates to dielectric filters, including medium block and metal layer, the medium block is cuboid shape, including end face of opening a way, the opposite short-circuit face in open circuit end face, upper surface, electrode surface, left side and right side, the multiple resonance holes of setting are also extended through on the medium block, the one end in each resonance hole is on open circuit end face, the other end is on short-circuit face, and the inner wall in each resonance hole is equipped with metal layer, the short circuit face, upper surface, electrode surface, metal layer is equipped on left side and right side, the metal layer in resonance hole and the metal layer in short-circuit face are electrically connected, the open circuit end face is equipped with metal pattern layer, two the second naked empty regions are equipped at intervals on electrode surface, second naked empty region is U-shaped, the opening portion of the second naked empty region extends to open circuit end face, input electrode, output electrode is located at two In the opening of two naked empty regions.The present invention has the effect of low insertion loss and high out-of-side rejection.
Description
Technical field
The invention belongs to electronic component field more particularly to a kind of dielectric filters.
Background technique
Currently, dielectric filter is widely applied in mobile communication system and microwave telecommunication system, with medium
The continuous development of the miniaturization of filter, product also have been widely used on consumer electronics product, such as vehicle mounted guidance system
It unites (BDS, GPS), WIFI system etc., in such systems, the major function of dielectric filter are to realize frequency-selecting, that is, are passed through
Frequency signal required for system, inhibition do not need interfering frequency signal.
Use at present dielectric filter be using the medium block of the ceramic material of certain dielectric constant as carrier,
There are multiple resonance holes through the carrier thereon, the one end in multiple resonance holes is located on open surface, and the other end is located at the short circuit face
On.The surface in multiple resonance hole is covered with conductive material and forms resonator, short-circuit face, top surface, two side faces and the bottom of medium block
Face is covered with conductive material to form the ground connection of the filter, the conductive layer electricity of multiple resonance hole conductive layer one end and short-circuit face
Property connect to form short-circuit end, the other end be located at the open surface formed open end.Have in bottom surface portions covering conductive material production
A gap, input terminal are formed between one input terminal and an output end, the input terminal and the output end and other conductive layers of bottom
Effect with output end provides signal input and output.
In the pattern covered on medium block open surface due to application demand difference difference, in WIFI system of new generation
In, due to the limitation of interior design needs and complete machine space, ANT is leaned at end close to each other, in order to guarantee that system is transported
Row is unobstructed, and interference-free between different channel, therefore, the filter rejection ability of synchronization channels will improve.And traditional sucrose is filtered
The unreasonable patterning design of wave device, Yao Tigao Out-of-band rejection, it is necessary to which the insertion loss for sacrificing filter necessarily affects in this way
The performance of system declines.
Summary of the invention
In order to solve the above technical problems, have the object of the present invention is to provide one kind and press down outside low insertion loss and high band
The dielectric filter of system.
To achieve the goals above, present invention employs technical solutions below:
Dielectric filter, including medium block and metal layer, the medium block are cuboid shape, including open end
Face, open a way end face opposite short-circuit face, upper surface, electrode surface, left side and right side, it is more to also extend through setting on the medium block
A resonance hole, on open circuit end face, the other end is set on short-circuit face, and on the inner wall in each resonance hole for the one end in each resonance hole
There is metal layer,
The short circuit face, electrode surface, is equipped with metal layer on left side and right side at upper surface, the metal layer in resonance hole with it is short
The metal layer on road surface is electrically connected,
The open circuit end face is equipped with metal pattern layer, and the metal pattern layer includes a plurality of sideline and multiple rectangular blocks, a plurality of
Sideline is separately positioned on the junction of open circuit end face and adjacent four faces, and multiple rectangular blocks are arranged in a one-to-one correspondence in multiple resonance holes
Surrounding, and with the metal layer in resonance hole be electrically connected,
Two the second naked empty regions are equipped at intervals on electrode surface, the second naked empty region is in U type, and the second naked empty region is opened
Mouth extends partially into open circuit end face, and input electrode, output electrode are located in the opening of two the second naked empty regions, and
Open circuit forms metal pattern input electrode, metal pattern output electrode on end face.
As a preferred solution: the resonance hole and rectangular block are four, first is respectively equipped on four resonance hole inner walls
Resonance metal layer, the second resonance metal layer, third resonance metal layer and the 4th resonance metal layer；Four rectangular blocks are respectively equidistant
Spaced left end rectangular block, the first intermediate rectangular block, the second intermediate rectangular block and right end rectangular block.
As a preferred solution: to be respectively equipped with first longitudinal direction straightway, second longitudinal direction straight for the interval of four rectangular blocks
The length of line segment and third longitudinal direction straightway is most short.
As a preferred solution: the metal pattern input electrode and metal pattern output electrode are I-shaped.
As a preferred solution: notch is equipped in the middle part of the lower edge of the first intermediate rectangular block, the second intermediate rectangular block, it is left
End rectangular block, right end rectangular block lower edge two sides are all provided with jagged.
As a preferred solution: the top of four rectangular blocks is additionally provided with horizontal linear section, left end rectangular block, right end rectangle
The outside indentation, there of block is respectively equipped with the small rectangular block in left side, the small rectangular block in right side.
As a preferred solution: the metal pattern input electrode, metal pattern output electrode respectively with left end rectangular block, the right side
It holds rectangular block adjacent, and forms a gap.
As a preferred solution: the gap between multiple metal patterns of the metal pattern layer forms the first naked empty region.
Filter construction of the invention by multiple adhesion metal layers resonance hole, metal pattern layer, input electrode and output
Electrode intercouples composition, and filter frequencies are determined by multiple resonance hole lengths, adjustment metal pattern layer and resonance mesoporous metal layer
Mutual coupling has reached filter using bandwidth, and effect provides the low insertion loss (Lower of filter
insertion loss)；Adjust longitudinal straightway and input electrode, output electrode and resonance mesoporous metal layer in metal pattern layer
It intercouples to improve the slope of the transmission line of positive transmission coefficient and transmission zero, the band of improved effect dielectric filter is outer
Inhibit, to achieve the effect that high inhibition (Higher rejection).
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention 1；
Fig. 2 is the elevational schematic view of Fig. 1；
Fig. 3 is the schematic rear view of Fig. 1；
Fig. 4 is the structural schematic diagram of the embodiment of the present invention 2；
Fig. 5 is the measurement curve graph of the filter of embodiment 1；
Fig. 6 is the measurement curve graph of the filter of embodiment 2.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Embodiment 1
Dielectric filter as shown in Figure 1 to Figure 3, including medium block 100 and metal layer, wherein medium block 100 is generally low
Cuboid shape made of the ceramic material of dielectric constant, including the opposite short circuit in open circuit end face 120, open circuit end face
Face 130, upper surface 140, electrode surface 150, left side 160 and right side 170, short-circuit face, upper surface, electrode surface, left side and
Right side has been covered each by the first ground metal layer 130a, the second ground metal layer 140a, third ground metal layer 150a, and the 4th
Ground metal layer 160a, the 5th ground metal layer 170a；The metal layer part of these coverings constitutes the ground connection of entire filter；
The multiple resonance holes 110 of setting are also extended through on the medium block 100, multiple 110 diameters of resonance hole are identical, each resonance hole
110 one end is on open circuit end face 120, and the other end is on short-circuit face 130, and the inner wall in each resonance hole 110 is equipped with metal
The metal layer in layer, the metal layer in resonance hole 110 and short-circuit face 130 is electrically connected,
The open circuit end face 120 is equipped with metal pattern layer 122, and the metal pattern layer includes a plurality of sideline and multiple rectangles
Block, a plurality of sideline are separately positioned on the junction of open circuit end face 120 and adjacent four faces, and multiple rectangular blocks are arranged in a one-to-one correspondence
The surrounding in multiple resonance holes 110, and be electrically connected with the metal layer in resonance hole 110, a plurality of sideline includes open circuit end face and upper table
The upper sideline 122a of the junction setting in face, the left side bearing 122c of the junction setting of open a way end face and left side, end face of opening a way
The right side bearing 122d being arranged with the junction of right side, the lower sideline 122b of the junction setting of open a way end face and electrode surface；
Two the second naked empty regions 151 are equipped at intervals on electrode surface 150, the second naked empty region 151 is in U type, and described second is naked
The opening portion of empty region 151 extends to open circuit end face 120, and input electrode 152, output electrode 153 are located at two second
In the opening of naked empty region 151, and metal pattern input electrode 152a, metal pattern output electricity are formed on open circuit end face 120
Pole 153a.
The resonance hole 110 and rectangular block are four, are respectively equipped with the first resonance metal on four 110 inner walls of resonance hole
Layer 111, the second resonance metal layer 112, third resonance metal layer 113 and the 4th resonance metal layer 114；Four rectangular blocks are respectively
Left end rectangular block 122e, the first intermediate rectangular block 122f, the second intermediate rectangular block 122g and the right end rectangle of equidistant interval setting
Block 122h.
The interval of four rectangular blocks be respectively equipped with first longitudinal direction straightway 122i, second longitudinal direction straightway 122j and
Third longitudinal direction straightway 122k, and the length for being located at the second longitudinal direction straightway 122j at middle part is most short.First longitudinal direction straightway
One end of 122i, second longitudinal direction straightway 122j and third longitudinal direction straightway 122k are electrically connected with electrode surface metal layer.
The metal pattern input electrode 152a and metal pattern output electrode 153a is I-shaped.The metal figure
Case input electrode 152a, metal pattern output electrode 153a are adjacent with left end rectangular block 122e, right end rectangular block 122h respectively, and
Form a gap.Gap between multiple metal patterns of the metal pattern layer forms the first naked empty region 121.
Fig. 5 is the measurement curve graph of the present embodiment filter construction, and as shown in the figure, 10 be positive transmission coefficient
(S21), 10b is reflection coefficient (S11), and 10a is the rejection zone transmission zero of positive transmission coefficient.Filter construction is by multiple attached
The resonance hole of metal layer, metal pattern layer 122, input electrode and output electrode intercouple composition, filter frequencies are by more
A resonance hole length determines that adjustment metal pattern layer 122 and the mutual coupling of resonance mesoporous metal layer have reached filter
Using bandwidth, effect provides the low insertion loss (Lower insertion loss) of filter；Adjust metal pattern layer 122
Upper first longitudinal direction straightway 122i, second longitudinal direction straightway 122j and third longitudinal direction straightway 122k and input electrode, output electricity
The metal layer of pole and resonance hole intercouples to improve the slope of S21 transmission line and transmission zero, improved effect medium
The Out-of-band rejection of filter, to achieve the effect that high inhibition (Higher rejection).
Embodiment 2
As shown in figure 4, the present embodiment and the structure of embodiment 1 are essentially identical, it also include main naked empty region 200, top surface 240 is humorous
Shake through-hole 211, left side resonance mesoporous metal layer 211a, right side resonance mesoporous metal layer 211d, topside metal layer 240a, right side 270,
Right side metal layer 270a and time naked empty region 220, the main distinction are on open circuit end face that metal pattern is different, metal pattern layer
Upper sideline 222a in 222, lower sideline 222b, left side bearing 222c, right side bearing 222d is connect with other surfaces metal layer, multiple
Rectangular block 222e, 222f, 222g, 222h and multiple resonance mesoporous metal layers are electrically connected, and horizontal linear section 222k is located at multiple
The upside of rectangular block, in addition, the small rectangular block 222i in left side is adjacent with rectangular block 222e, the small rectangular block 222j in right side and rectangle
Block 222h is adjacent, and rectangular block 252a is the electrode that electrode surface input terminal extends to end face, and there are between one with rectangular block 222e
Gap forms electrode coupling, and rectangular block 253a is the electrode that electrode surface output end extends to end face, and there are one with rectangular block 222h
Gap forms electrode coupling.
Fig. 6 is the measurement curve graph of the present embodiment filter construction, and as shown in the figure, 20 be positive transmission coefficient
(S21), 20b is reflection coefficient (S11), and 20a is the rejection zone transmission zero of positive transmission coefficient.Filter construction is by multiple
Resonance hole, metal pattern layer, input electrode and the output electrode of adhesion metal layer intercouple composition, and filter frequencies are by multiple
Resonance hole length determines that adjustment metal pattern layer and the mutual coupling of resonance mesoporous metal layer have reached filter and use band
Width, effect provide the low insertion loss (Lower insertion loss) of filter；It adjusts horizontal straight in metal pattern layer
Line segment 222k, the small rectangular block 222i in left side, the small rectangular block 222j in right side and input electrode, output electrode and both sides resonance hole gold
Belong to intercoupling to improve the slope of S21 transmission line and transmission zero for the size of layer, improved effect dielectric filter
Out-of-band rejection, to achieve the effect that dielectric filter height inhibits (Higher rejection).
The main purpose of the present invention is to provide a kind of improved filters of structure, improve the integrally-built spy of filter
Property, therefore metal pattern layer is set on the opening end face by the present invention, by coupled modes of different shapes, to increase filter
Structure entirety coupled capacitor, reaches required working frequency, in combination with the ground connection of filter, provides with low insertion loss
The effects of (Lower insertion loss) and Out-of-band rejection (Higher rejection).
It should be pointed out that above embodiments are only representative examples of the invention.The present invention can also there are many deformations.It is all
Any simple modification, equivalent change and modification to the above embodiments of essence according to the present invention are considered as belonging to this
The protection scope of invention.
Claims (8)
1. dielectric filter, it is characterised in that: including medium block (100) and metal layer, the medium block (100) is flat for right angle
Row hexahedral shape, including the opposite short-circuit face (130) in open circuit end face (120), open circuit end face, upper surface (140), electrode surface
(150), left side (160) and right side (170) also extend through the multiple resonance holes (110) of setting on the medium block (100), often
One end of a resonance hole (110) is in open circuit end face (120), and the other end is on short-circuit face (130), and each resonance hole (110)
Inner wall be equipped with metal layer,
The short circuit face (130), electrode surface (150), is equipped on left side (160) and right side (170) upper surface (140)
The metal layer of metal layer, the metal layer of resonance hole (110) and short-circuit face (130) is electrically connected,
The open circuit end face (120) be equipped with metal pattern layer (122), the metal pattern layer (122) include a plurality of sideline and
Multiple rectangular blocks, a plurality of sideline are separately positioned on the junction of open circuit end face (120) and adjacent four faces, and multiple rectangular blocks are one by one
It is correspondingly arranged at the surrounding of multiple resonance holes (110), and is electrically connected with the metal layer of resonance hole (110),
Two the second naked empty regions (151) are equipped at intervals on electrode surface (150), the second naked empty region (151) is in U type, described
The opening portion of second naked empty region (151) extends to open circuit end face (120), input electrode (152), output electrode (153) point
Wei Yu not be in the opening of two the second naked empty regions (151), and metal pattern input electrode is formed in open circuit end face (120)
(152a), metal pattern output electrode (153a).
2. dielectric filter according to claim 1, it is characterised in that: the resonance hole (110) and rectangular block are four
It is a, the first resonance metal layer (111), the second resonance metal layer (112), third are respectively equipped on four resonance hole (110) inner walls
Resonance metal layer (113) and the 4th resonance metal layer (114)；Four rectangular blocks are respectively the left end rectangular block of equidistant interval setting
(122e), the first intermediate rectangular block (122f), the second intermediate rectangular block (122g) and right end rectangular block (122h).
3. dielectric filter according to claim 2, it is characterised in that: the interval of four rectangular blocks is respectively equipped with
First longitudinal direction straightway (122i), second longitudinal direction straightway (122j) and third longitudinal direction straightway (122k), and it is located at middle part
The length of second longitudinal direction straightway (122j) is most short.
4. dielectric filter according to claim 1 or 2, it is characterised in that: the metal pattern input electrode (152a)
It is I-shaped with metal pattern output electrode (153a).
5. dielectric filter according to claim 2, it is characterised in that: the first intermediate rectangular block (122f), second
Notch, left end rectangular block (122e), the lower edge right end rectangular block (122h) are equipped in the middle part of the lower edge of intermediate rectangular block (122g)
Two sides are all provided with jagged.
6. dielectric filter according to claim 5, it is characterised in that: the top of four rectangular blocks is additionally provided with level
Straightway (222k), left end rectangular block (122e), right end rectangular block (122h) outside indentation, there be respectively equipped with the small rectangle in left side
Block (222i), the small rectangular block in right side (222j).
7. dielectric filter according to claim 1, it is characterised in that: the metal pattern input electrode (152a), gold
Metal patterns output electrode (153a) is adjacent with left end rectangular block (122e), right end rectangular block (122h) respectively, and is formed between one
Gap.
8. dielectric filter according to claim 1, it is characterised in that: multiple metals of the metal pattern layer (122)
Gap between pattern forms the first naked empty region (121).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910434438.3A CN110071350A (en) | 2019-05-23 | 2019-05-23 | Dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910434438.3A CN110071350A (en) | 2019-05-23 | 2019-05-23 | Dielectric filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110071350A true CN110071350A (en) | 2019-07-30 |
Family
ID=67371383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910434438.3A Pending CN110071350A (en) | 2019-05-23 | 2019-05-23 | Dielectric filter |
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| Country | Link |
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| CN (1) | CN110071350A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258232A (en) * | 2021-06-18 | 2021-08-13 | 中国电子科技集团公司第二十六研究所 | High-suppression broadband dielectric filter |
| WO2022067536A1 (en) * | 2020-09-29 | 2022-04-07 | 华为技术有限公司 | Filter, transmitter, receiver, and communication system |
| WO2022160432A1 (en) * | 2021-01-26 | 2022-08-04 | 嘉兴佳利电子有限公司 | Novel dielectric filter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204927460U (en) * | 2015-07-16 | 2015-12-30 | 深圳乾瀚科技有限公司 | Improve out of band rejection's broad band filter |
| CN107959094A (en) * | 2016-10-17 | 2018-04-24 | 太盟光电科技股份有限公司 | The improved wave filter of structure |
| CN208723059U (en) * | 2019-01-30 | 2019-04-09 | 苏州捷频电子科技有限公司 | Ceramic dielectric filter and duplexer |
| CN209929454U (en) * | 2019-05-23 | 2020-01-10 | 嘉兴佳利电子有限公司 | Dielectric filter |
-
2019
- 2019-05-23 CN CN201910434438.3A patent/CN110071350A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204927460U (en) * | 2015-07-16 | 2015-12-30 | 深圳乾瀚科技有限公司 | Improve out of band rejection's broad band filter |
| CN107959094A (en) * | 2016-10-17 | 2018-04-24 | 太盟光电科技股份有限公司 | The improved wave filter of structure |
| CN208723059U (en) * | 2019-01-30 | 2019-04-09 | 苏州捷频电子科技有限公司 | Ceramic dielectric filter and duplexer |
| CN209929454U (en) * | 2019-05-23 | 2020-01-10 | 嘉兴佳利电子有限公司 | Dielectric filter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022067536A1 (en) * | 2020-09-29 | 2022-04-07 | 华为技术有限公司 | Filter, transmitter, receiver, and communication system |
| WO2022160432A1 (en) * | 2021-01-26 | 2022-08-04 | 嘉兴佳利电子有限公司 | Novel dielectric filter |
| CN113258232A (en) * | 2021-06-18 | 2021-08-13 | 中国电子科技集团公司第二十六研究所 | High-suppression broadband dielectric filter |
| CN113258232B (en) * | 2021-06-18 | 2024-03-12 | 中国电子科技集团公司第二十六研究所 | High rejection broadband dielectric filter |
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