CN107069155A - A kind of dielectric waveguide filter and its coupling inversion structures - Google Patents
A kind of dielectric waveguide filter and its coupling inversion structures Download PDFInfo
- Publication number
- CN107069155A CN107069155A CN201710021830.6A CN201710021830A CN107069155A CN 107069155 A CN107069155 A CN 107069155A CN 201710021830 A CN201710021830 A CN 201710021830A CN 107069155 A CN107069155 A CN 107069155A
- Authority
- CN
- China
- Prior art keywords
- medium window
- medium
- window
- resonator
- dielectric waveguide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/10—Dielectric resonators
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The embodiments of the invention provide a kind of coupling inversion structures of dielectric waveguide filter, at least one pore structure is opened up on the resonator, in resonator continuous medium window is formed along the periphery of pore structure, medium to expose the resonator, for being coupled between resonator, wherein, the length dimension of medium window sets the half-wavelength more than dielectric waveguide filter working frequency, invert the coupling polarity of resonator.The invention also discloses a kind of dielectric waveguide filter.Implement the dielectric waveguide filter and its coupling inversion structures of the embodiment of the present invention, it can make just can realize that coupling polarity is inverted without welding between resonator, produce negative coupling, reduce the build-up tolerance that welding is caused；Production precision is improved, the integration production of dielectric filter can be carried out.
Description
Technical field
The present invention relates to radio-frequency filter, more particularly to a kind of dielectric waveguide filter and its coupling inversion structures.
Background technology
With the development of wave filter industry, miniaturization, lightweight are increasingly becoming a kind of trend.Medium Wave Guide can significantly subtract
Miscellaneous goods size, and with high q-factor, the advantages of temperature drift is small is a kind of miniaturization solution well.
Current dielectric waveguide filter and cavity body filter still suffers from cross-couplings（Negative coupling）It is complicated, and not enough
Flexibly, difficult technical problem is realized.For example：The existing cross-linked dielectric waveguide filter of generation mainly has following three kinds
Form：
The first is the solution of metal probe structure, can produce negative cross-couplings.During implementation, medium needs to be beaten
Hole operation, then inserts metal probe in medium.Although the metal probe structure of this kind of embodiment can produce negative coupling
Close, but there is in assembling and fixation certain difficulty.
It is for second the solution of external microstrip line construction, negative cross-couplings can be produced.During implementation, first, need
The silver-colored microstrip line worked it out is brushed on medium block surface and probe is assembled, probe is connected with medium block resonator.It is present
Technical problem be：On the one hand the parts of product are added, it is relatively complicated in assembling and fixation, it is less efficient.The opposing party
Face, the cross-linked intensity that the structure is provided is weaker, it is difficult to strengthen, further increases the difficulty of design.
The third solution is the coupling polarity inversion scheme of window, and its technical problem existed is that needs will be different
Medium block welds together, and has certain difficulty in technique, is unfavorable for controlling cost.
The content of the invention
Technical problem to be solved of the embodiment of the present invention is that there is provided a kind of dielectric waveguide filter and its coupling reversion
Structure, it can make the coupling polarity reversion that just can be realized without welding between resonator, produce negative coupling, reduce welding and make
Into build-up tolerance；Production precision is improved, the integration production of dielectric filter can be carried out.
In order to solve the above-mentioned technical problem, the embodiment of the present invention provides a kind of coupling reversion knot of dielectric waveguide filter
Structure, including：Resonator, it has a medium block, on medium block surface covered with conductive layer；Offered on the surface of resonator
At least one pore structure, forms continuous medium window, to expose the resonance in resonator along the periphery of pore structure
The medium of device, for being coupled between resonator, wherein, the length dimension of medium window, which is set, exceedes Medium Wave Guide filtering
The half-wavelength of device working frequency, invert the coupling polarity of resonator.
Wherein, pore structure is the inner surface brush silver of blind hole or through hole, blind hole and through hole.
Wherein, medium window at least includes：First medium window and end from first medium window be extended the
Second medium window, first medium window and second medium window span interval at an angle to each other are（0,90 °].
Wherein, second medium window, which is connected to the end of first medium window, makes medium window L-shaped or V-arrangement.
Wherein, medium window also includes being situated between from the 3rd extended medium window of the end of second medium window, the 3rd
Matter window makes medium window take the shape of the letter U parallel to first medium window.
Wherein, pore structure is set to two blind holes, and the 3rd medium window is located between two blind holes, and medium window is also included from the
The 4th extended medium window of the end of three medium windows, the 4th medium window is parallel to second medium window.
Wherein, medium window be first medium window, second medium window, the 3rd medium window, the 4th medium window with
And it is suitable according to the repetitive cycling connection of first medium window, second medium window, the 3rd medium window and the 4th medium window
The medium pattern of windows that limited number of time circulation in sequence is in turn connected to form.
Wherein, medium pattern of windows is arched.
Wherein, the medium of resonator is ceramic material, and the conductive layer covered on the resonator is argent.
In order to solve the above technical problems, present invention also offers a kind of Medium Wave Guide filter with above-mentioned coupling inversion structures
Ripple device.
Implement the dielectric waveguide filter and its coupling inversion structures of the present invention, have the advantages that：
First, the embodiment of the present invention is opened up at least one pore structure, resonator and formed along the periphery of pore structure on the resonator
Continuous medium window, the medium to expose resonator, for being coupled between resonator, makes the coupling of resonator
Polarity inversion, produces negative coupling.
Second, structure is simplified, without assemble welding, reduces the build-up tolerance that welding is caused.
3rd, production precision is improved, the integration production of dielectric filter can be carried out.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, according to
These accompanying drawings obtain other accompanying drawings and still fall within scope of the invention.
A kind of structural representation of the coupling inversion structures embodiment one for dielectric waveguide filter that Fig. 1 provides for the present invention
Figure.
Along outside pore structure in the coupling inversion structures embodiment one of a kind of dielectric waveguide filter that Fig. 2 provides for the present invention
The structural representation for the medium window that week is formed.
A kind of structural representation of the coupling inversion structures embodiment two for dielectric waveguide filter that Fig. 3 provides for the present invention
Figure.
Along pore structure in a kind of coupling inversion structures embodiment two for dielectric waveguide filter that Fig. 4 provides for the present invention
The structural representation for the medium window that periphery is formed.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Referring to shown in Fig. 1-Fig. 2, the embodiment one of inversion structures is coupled for the dielectric waveguide filter that the present invention is provided.This
The coupling inversion structures of dielectric waveguide filter in embodiment, including：
Resonator 1, it has a medium block, and on medium block surface covered with conductive layer, the surface of resonator 1 opens up at least one
Pore structure, the continuous medium window 2 formed in resonator 1 along the periphery of pore structure, Jie to expose resonator 1
Matter, for being coupled between resonator 1, wherein, the length dimension of medium window 2, which is set, exceedes dielectric waveguide filter work
The half-wavelength of working frequency, invert the coupling polarity of resonator 1.
Pore structure in the present embodiment is it can also be provided that through hole, blind hole A interior table in blind hole A, other embodiment
Face brush silver, setting blind hole A effect is：The continuous medium window 2 formed in resonator 1 along blind hole A periphery.In this way,
When the length dimension of medium window 2 sets the half-wavelength more than dielectric waveguide filter working frequency, the coupling to make resonator
Close polarity inversion.
In the present embodiment, the continuous medium window 2 that blind hole A peripheries are formed at least includes：The He of first medium window 21
The second separation 22 being extended from the end of first medium window 21, between first medium window 21 and second separates 22 mutually
Angled span interval is（0,90 °] so that the end that second medium window 22 is connected to first medium window 21 makes
Medium window 2 is L-shaped or V-arrangement.
In a kind of embodiment, by above-mentioned medium window 21,22, resonator 1 can be separated, medium window
21st, 22 conductive layer is not covered with, exposes the medium of resonator, available for carrying out energy between resonator 1 and other resonators
Amount coupling.
Wherein, the medium of resonator 1 is ceramic material, and the conductive layer covered on resonator 1 is argent, can be with
Understand, in other examples, it would however also be possible to employ other kinds of metal conducting layer.
In figure, the resonator 1 is in cubic shape, and it is to be based on technique, the consideration in processing, combination conveniently, but specifically
During implementation, resonator can also be other common shapes, and such as resonator is cylindrical, trapezoidal.
Further, medium window also includes：From the 3rd extended medium window of the end of second medium window 22
23, the 3rd medium window 23 makes medium window take the shape of the letter U parallel to first medium window 21.
Referring to shown in Fig. 3-Fig. 4, the embodiment two of inversion structures is coupled for the dielectric waveguide filter that the present invention is provided.
The difference of the coupling inversion structures and above-described embodiment one of dielectric waveguide filter is in the present embodiment：It is situated between
Pore structure on matter window 11 is set to two blind holes A1, A2, and blind hole A1, A2 is opened in two relative surfaces of resonator 1 respectively
On, it is staggeredly arranged in the inside of resonator 1, the 3rd medium window 23 is located between two blind holes A1, A2, and medium window 2 also includes
From the 4th extended medium window 24 of the end of the 3rd medium window 23, the 4th medium window 24 is parallel to second medium window
Mouth 22.Resonator 1 can be separated by above-mentioned medium window 21,22,23,24,21.In a kind of embodiment, medium
Conductive layer is not covered with window 21,22,23,24,21, the medium of resonator is exposed, available in resonator 1 and other humorous
Shake and carry out energy coupling between device.
In the other embodiment of present media waveguide filter coupling inversion structures, medium window is first medium window
Mouthfuls 21, second medium window 22, the 3rd medium window 23, the 4th medium window 24 and according to first medium window 21, second
In the repetitive cycling order of connection of medium window 22, the 3rd medium window 23 and the 4th medium window 24 limited number of time circulation according to
The medium pattern of windows that secondary connection is formed.
Specifically, between the first medium window 12 and second medium window 22 in the medium window of the present embodiment diagram
Angle be 90 °, the angle between the medium window 23 of second medium window 22 and the 3rd is 90 °, by that analogy, ultimately forms and is in
The medium pattern of windows of arch.
The effect being arranged such is：Multiple medium windows 2 are sequentially connected arched total length more than half-wavelength.Wherein：
Medium window total length refers to the summation of a plurality of medium length of window or true according to the position of centre of gravity institute of multiple medium windows
The medium length of window recognized, it can invert the coupling polarity between two resonators, produce negative coupling.
By opening up blind hole structure in the present embodiment, compared with traditional snakelike window, structure is simpler, it is not necessary to weld
Assembling, reduces the build-up tolerance that welding is caused, can further lift production precision, can carry out the one of dielectric filter
Metaplasia is produced.In other embodiment, number, position and quantity of blind hole etc. can be set according to actual needs.
In summary, by setting blind hole in resonator, continuous Jie formed on the resonator along the periphery of blind hole
Matter window, more simple in structure, coupling is strong and weak to be carried out by the size of blind hole and the change of position to coupling amount
Control, productivity is high, and cost is relatively low.
The invention also discloses a kind of dielectric waveguide filter with above-mentioned coupling inversion structures, its embodiment
It is identical with the embodiment of the coupling inversion structures of above-mentioned dielectric waveguide filter, repeat no more.
Implement the dielectric waveguide filter and its coupling inversion structures of the embodiment of the present invention, have the advantages that：
First, the embodiment of the present invention is opened up at least one pore structure, resonator and formed along the periphery of pore structure on the resonator
Continuous medium window, the medium to expose resonator, for being coupled between resonator, make the coupling of resonator
Polarity inversion is closed, negative coupling is produced.
Second, structure is simplified, without assemble welding, reduces the build-up tolerance that welding is caused.
3rd, production precision is improved, the integration production of dielectric filter can be carried out.
Claims (10)
1. a kind of coupling inversion structures of dielectric waveguide filter, it is characterised in that including：
Resonator, it has a medium block, on the medium block surface covered with conductive layer；
The surface of the resonator is opened up to be formed continuously at least one pore structure, the resonator along the periphery of the pore structure
Medium window, the medium to expose the resonator, for being coupled between resonator, wherein, the medium
The length dimension of window sets the half-wavelength more than the dielectric waveguide filter working frequency, the coupling to make the resonator
Close polarity inversion.
2. the coupling inversion structures of dielectric waveguide filter as claimed in claim 1, it is characterised in that the pore structure is blind
The inner surface brush argent of hole or through hole, the blind hole and the through hole.
3. the coupling inversion structures of dielectric waveguide filter as claimed in claim 2, it is characterised in that the medium window is extremely
Include less：The extended second medium window of first medium window and end from the first medium window, described first
Medium window and second medium window span interval at an angle to each other are（0,90 °].
4. the coupling inversion structures of dielectric waveguide filter as claimed in claim 3, it is characterised in that the second medium window
The end that mouth is connected to the first medium window makes the medium window L-shaped or V-arrangement.
5. the coupling inversion structures of dielectric waveguide filter as claimed in claim 3, it is characterised in that the medium window is also
Including the 3rd medium window being extended from the end of the second medium window, the 3rd medium window is parallel to described
First medium window makes the medium window take the shape of the letter U.
6. the coupling inversion structures of dielectric waveguide filter as claimed in claim 5, it is characterised in that the pore structure is set to
Two blind holes, the 3rd medium window is located between two blind holes, and the medium window is also included from the 3rd medium window
Extended the 4th medium window in end, the 4th medium window is parallel to the second medium window.
7. the coupling inversion structures of dielectric waveguide filter as claimed in claim 6, it is characterised in that the medium window is
The first medium window, the second medium window, the 3rd medium window, the 4th medium window and according to
Having in one medium window, second medium window, the repetitive cycling order of connection of the 3rd medium window and the 4th medium window
Limit time circulation is sequentially connected the medium pattern of windows of the formation.
8. the coupling inversion structures of dielectric waveguide filter as claimed in claim 7, it is characterised in that the medium window figure
Case is arched.
9. the coupling inversion structures of dielectric waveguide filter as claimed in claim 1, it is characterised in that Jie of the resonator
Matter is ceramic material, and the conductive layer covered on the resonator is argent.
10. a kind of dielectric waveguide filter, it is characterised in that the dielectric waveguide filter is included as claim 1-9 is any
The coupling inversion structures of dielectric waveguide filter described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710021830.6A CN107069155B (en) | 2017-01-12 | 2017-01-12 | A kind of dielectric waveguide filter and its coupling inversion structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710021830.6A CN107069155B (en) | 2017-01-12 | 2017-01-12 | A kind of dielectric waveguide filter and its coupling inversion structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107069155A true CN107069155A (en) | 2017-08-18 |
| CN107069155B CN107069155B (en) | 2019-07-30 |
Family
ID=59598657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710021830.6A Active CN107069155B (en) | 2017-01-12 | 2017-01-12 | A kind of dielectric waveguide filter and its coupling inversion structures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107069155B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107464973A (en) * | 2017-09-20 | 2017-12-12 | 付海波 | Coupled structure and passive cavity filter |
| CN109149025A (en) * | 2018-08-22 | 2019-01-04 | 京信通信系统（中国）有限公司 | Dielectric waveguide filter and its tuning methods |
| CN109244615A (en) * | 2018-09-06 | 2019-01-18 | 武汉凡谷电子技术股份有限公司 | A kind of capacitive coupling device and filter |
| CN110137638A (en) * | 2019-04-26 | 2019-08-16 | 摩比科技（深圳）有限公司 | Ceramic waveguide filter |
| CN110224210A (en) * | 2019-05-30 | 2019-09-10 | 江苏灿勤科技股份有限公司 | A kind of filter in laminated medium comprising negative coupled structure |
| CN110459843A (en) * | 2019-08-22 | 2019-11-15 | 深圳市国人射频通信有限公司 | A kind of dielectric waveguide filter |
| CN110518313A (en) * | 2019-09-02 | 2019-11-29 | 深圳市国人射频通信有限公司 | A kind of dielectric waveguide filter |
| WO2020171247A1 (en) * | 2019-02-19 | 2020-08-27 | Samsung Electronics Co., Ltd. | A substrate waveguide filter and a coupling inversion structure thereof |
| WO2020198979A1 (en) | 2019-03-29 | 2020-10-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Resonating structure and dielectric filter having the same |
| CN111900518A (en) * | 2020-08-21 | 2020-11-06 | 西安电子科技大学 | Dielectric filter with 180-degree phase shifter |
| WO2021031356A1 (en) * | 2019-08-22 | 2021-02-25 | 深圳国人科技股份有限公司 | Dielectric waveguide filter |
| CN118336320A (en) * | 2020-08-26 | 2024-07-12 | 江苏灿勤科技股份有限公司 | Filter with high efficiency during trial production and suitable for mass production |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63311802A (en) * | 1987-06-12 | 1988-12-20 | Murata Mfg Co Ltd | Dielectric resonator |
| CN203707287U (en) * | 2014-02-26 | 2014-07-09 | 成都信息工程学院 | Source and multiple resonators-coupled substrate integrated waveguide filter |
| CN105244571A (en) * | 2015-09-17 | 2016-01-13 | 深圳三星通信技术研究有限公司 | Dielectric waveguide filter |
| CN106299558A (en) * | 2016-08-24 | 2017-01-04 | 张家港保税区灿勤科技有限公司 | high reliability dielectric waveguide filter |
-
2017
- 2017-01-12 CN CN201710021830.6A patent/CN107069155B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63311802A (en) * | 1987-06-12 | 1988-12-20 | Murata Mfg Co Ltd | Dielectric resonator |
| CN203707287U (en) * | 2014-02-26 | 2014-07-09 | 成都信息工程学院 | Source and multiple resonators-coupled substrate integrated waveguide filter |
| CN105244571A (en) * | 2015-09-17 | 2016-01-13 | 深圳三星通信技术研究有限公司 | Dielectric waveguide filter |
| CN106299558A (en) * | 2016-08-24 | 2017-01-04 | 张家港保税区灿勤科技有限公司 | high reliability dielectric waveguide filter |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107464973A (en) * | 2017-09-20 | 2017-12-12 | 付海波 | Coupled structure and passive cavity filter |
| CN109149025A (en) * | 2018-08-22 | 2019-01-04 | 京信通信系统（中国）有限公司 | Dielectric waveguide filter and its tuning methods |
| CN109149025B (en) * | 2018-08-22 | 2020-12-15 | 京信通信技术(广州)有限公司 | Dielectric waveguide filter and tuning method thereof |
| CN109244615A (en) * | 2018-09-06 | 2019-01-18 | 武汉凡谷电子技术股份有限公司 | A kind of capacitive coupling device and filter |
| CN109244615B (en) * | 2018-09-06 | 2024-04-05 | 武汉凡谷电子技术股份有限公司 | Capacitive coupling device and filter |
| WO2020171247A1 (en) * | 2019-02-19 | 2020-08-27 | Samsung Electronics Co., Ltd. | A substrate waveguide filter and a coupling inversion structure thereof |
| EP3949006A4 (en) * | 2019-03-29 | 2022-11-16 | Telefonaktiebolaget Lm Ericsson (Publ) | Resonating structure and dielectric filter having the same |
| WO2020198979A1 (en) | 2019-03-29 | 2020-10-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Resonating structure and dielectric filter having the same |
| US12021287B2 (en) | 2019-03-29 | 2024-06-25 | Telefonaktiebolaget Lm Ericsson (Publ) | Resonating structure for a dielectric filter comprising a dielectric body including offset first and second blind coupling holes with respective defected portions |
| CN110137638A (en) * | 2019-04-26 | 2019-08-16 | 摩比科技（深圳）有限公司 | Ceramic waveguide filter |
| CN110224210A (en) * | 2019-05-30 | 2019-09-10 | 江苏灿勤科技股份有限公司 | A kind of filter in laminated medium comprising negative coupled structure |
| CN110224210B (en) * | 2019-05-30 | 2024-04-26 | 江苏灿勤科技股份有限公司 | Laminated dielectric filter comprising negative coupling structure |
| CN110459843A (en) * | 2019-08-22 | 2019-11-15 | 深圳市国人射频通信有限公司 | A kind of dielectric waveguide filter |
| WO2021031356A1 (en) * | 2019-08-22 | 2021-02-25 | 深圳国人科技股份有限公司 | Dielectric waveguide filter |
| CN110518313A (en) * | 2019-09-02 | 2019-11-29 | 深圳市国人射频通信有限公司 | A kind of dielectric waveguide filter |
| CN111900518A (en) * | 2020-08-21 | 2020-11-06 | 西安电子科技大学 | Dielectric filter with 180-degree phase shifter |
| CN118336320A (en) * | 2020-08-26 | 2024-07-12 | 江苏灿勤科技股份有限公司 | Filter with high efficiency during trial production and suitable for mass production |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107069155B (en) | 2019-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107069155A (en) | A kind of dielectric waveguide filter and its coupling inversion structures | |
| CN105244571B (en) | A kind of dielectric waveguide filter | |
| CN103633402B (en) | Duplexer and there is the communication system of this duplexer | |
| US2414085A (en) | Oscillator | |
| CN206532857U (en) | A kind of ceramic waveguide wave filter | |
| CN209691920U (en) | Cavity body filter and cross coupling structure for cavity body filter | |
| FI112722B (en) | Dielectric resonator apparatus and method for its manufacture | |
| WO2020211287A1 (en) | Dielectric filter and 5g communication device | |
| WO2021008005A1 (en) | Dielectric waveguide filter | |
| CN106450609A (en) | Cross-coupling band-pass filter based on circular substrate integrated waveguide resonance cavity | |
| CN210379367U (en) | Ceramic dielectric filter | |
| CN110011006A (en) | Bandpass filter | |
| CN210111005U (en) | Dielectric waveguide filter for improving harmonic performance, radio frequency module and base station | |
| JP2015506628A (en) | Multimode bandpass filter | |
| CN111463526A (en) | Microwave dielectric waveguide filter with electric field diaphragm coupling | |
| CN205452491U (en) | Combination formula wave filter of ceramic resonator fluting coupled modes | |
| CN110459843A (en) | A kind of dielectric waveguide filter | |
| CN106785259A (en) | A kind of micro-strip cross-coupled filter | |
| CN209515959U (en) | A kind of dielectric waveguide filter | |
| CN209592274U (en) | Dielectric filter and 5G communication equipment | |
| CN115986348A (en) | Dielectric filter unit and dielectric filter | |
| JP6267801B2 (en) | Resonator, filter, and communication device | |
| Romano et al. | 3D-printed compact waveguide filters based on slanted ridge resonators | |
| CN206893772U (en) | A kind of ceramic waveguide wave filter | |
| CN209434359U (en) | A kind of dielectric waveguide filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |