CN113258232B - High rejection broadband dielectric filter - Google Patents
High rejection broadband dielectric filter Download PDFInfo
- Publication number
- CN113258232B CN113258232B CN202110679488.5A CN202110679488A CN113258232B CN 113258232 B CN113258232 B CN 113258232B CN 202110679488 A CN202110679488 A CN 202110679488A CN 113258232 B CN113258232 B CN 113258232B
- Authority
- CN
- China
- Prior art keywords
- hole
- resonant
- resonator
- electrode
- strip
- 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.)
- Active
Links
- 239000000919 ceramic Substances 0.000 claims abstract description 27
- 238000001465 metallisation Methods 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 238000002955 isolation Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract description 13
- 238000010168 coupling process Methods 0.000 abstract description 13
- 238000005859 coupling reaction Methods 0.000 abstract description 13
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 230000001965 increasing effect Effects 0.000 abstract description 8
- 230000001629 suppression Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 4
- 238000006880 cross-coupling reaction Methods 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver 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 invention discloses a high-suppression broadband dielectric filter, which comprises a ceramic dielectric body, wherein six resonant holes are sequentially formed in the top surface of the ceramic dielectric body along the length direction, two strip-shaped grooves are sequentially formed in the bottom surface of the ceramic dielectric body along the length direction, and each strip-shaped groove is respectively communicated with three resonant holes; the wall of each resonant hole and the wall of each bar-shaped groove are formed with a metal layer through metallization, and each resonant hole is positioned at the orifice of the top surface and is formed with a top surface electrode through metallization. In the invention, six resonant holes are respectively communicated through two strip-shaped grooves, so that transmission zero points appear outside the high-frequency part of the filter, thereby improving the out-of-band suppression of the high-end; the order of the filter can be effectively reduced, so that the size and loss of the filter are reduced, and the application effect is improved; in addition, the coupling coefficient of the filter can be increased by arranging the strip-shaped groove, and the coupling coefficient can be conveniently adjusted; simple structure, the practicality is strong.
Description
Technical Field
The invention relates to the field of dielectric filters, in particular to a high-suppression broadband dielectric filter.
Background
The integrated dielectric filter adopts electronic ceramic material as medium and is formed into a multi-stage resonant cavity to realize the frequency selection function. The high dielectric constant of the ceramic material can greatly reduce the size of the filter, so that the dielectric filter has the advantages of miniaturization, good temperature characteristic, good power resistance, low cost, high manufacturing consistency and the like, and can realize miniaturized and integrated application. However, the out-of-band rejection of the wideband dielectric filter is poor, and especially, the parasitic effect caused by the overall structure of the dielectric filter further worsens the out-of-band rejection, so that the range of the relative bandwidth which can be realized by the dielectric filter is very limited; in addition, implementations using integral media have difficulty in making the coupling coefficient between resonators large.
Disclosure of Invention
The invention aims to solve the technical problem of providing a broadband dielectric filter capable of realizing high suppression of 40% relative bandwidth.
The technical scheme of the invention is as follows:
the high-suppression broadband dielectric filter comprises a ceramic dielectric body, wherein a first resonant hole, a second resonant hole, a third resonant hole, a fourth resonant hole, a fifth resonant hole and a sixth resonant hole are sequentially formed in the top surface of the ceramic dielectric body along the length direction, a first strip-shaped groove and a second strip-shaped groove are sequentially formed in the bottom surface of the ceramic dielectric body along the length direction, the first resonant hole, the second resonant hole and the third resonant hole are communicated with the first strip-shaped groove, and the fourth resonant hole, the fifth resonant hole and the sixth resonant hole are communicated with the second strip-shaped groove; each resonance hole is positioned at the orifice of the top surface and is provided with a top surface electrode through metallization treatment, and each resonance hole forms a dielectric resonator together with a medium filled around the resonance hole and the corresponding top surface electrode;
the hole wall of each resonance hole and the walls of the first strip-shaped groove and the second strip-shaped groove are formed with metal layers through metallization treatment, and the metal layers of the hole walls of each resonance hole are respectively connected with the corresponding top surface electrodes; the ceramic dielectric body is provided with a ground electrode, a first input/output electrode and a second input/output electrode through metallization treatment, and isolation belts are arranged among the ground electrode, the first input/output electrode, the second input/output electrode and each top surface electrode.
Further, the axes of the first resonant hole, the second resonant hole, the third resonant hole, the fourth resonant hole, the fifth resonant hole and the sixth resonant hole are perpendicular to the top surface of the ceramic dielectric body.
Further, the diameter of the second resonance hole is larger than the diameters of the first resonance hole and the third resonance hole; the diameter of the fifth resonance hole is larger than the diameters of the fourth resonance hole and the sixth resonance hole.
Further, the diameters of the first resonance hole, the third resonance hole, the fourth resonance hole and the sixth resonance hole are the same, and the diameters of the second resonance hole and the fifth resonance hole are the same.
Further, the widths of the first and second grooves are equal to the diameters of the second and fifth resonance holes.
Further, the first resonant hole and the corresponding top surface electrode thereof, the second resonant hole and the corresponding top surface electrode thereof, the third resonant hole and the corresponding top surface electrode thereof, and the first bar-shaped groove form a first resonant assembly, the fourth resonant hole and the corresponding top surface electrode thereof, the fifth resonant hole and the corresponding top surface electrode thereof, the sixth resonant hole and the corresponding top surface electrode thereof, and the second bar-shaped groove form a second resonant assembly, and the first resonant assembly and the second resonant assembly are symmetrically arranged.
Further, one end of the first strip-shaped groove far away from the second strip-shaped groove and one end of the second strip-shaped groove far away from the first strip-shaped groove respectively penetrate through the side face of the corresponding end of the ceramic dielectric body.
Further, the lower orifices of the first resonant hole and the second resonant hole are positioned on the top surface of the first strip-shaped groove, and the lower orifices of the fifth resonant hole and the sixth resonant hole are positioned on the top surface of the second strip-shaped groove; the third resonance hole and the fourth resonance hole penetrate through the bottom surface of the ceramic dielectric body respectively, a notch communicated with the first strip-shaped groove is formed in the hole wall of the third resonance hole, and a notch communicated with the second strip-shaped groove is formed in the hole wall of the fourth resonance hole.
Further, the first input/output electrode is connected with the top surface electrode corresponding to the first resonance hole through a first connection section, and the second input/output electrode is connected with the top surface electrode corresponding to the sixth resonance hole through a second connection section.
In the invention, six resonant holes are respectively communicated through two strip-shaped grooves, so that the inductive cross coupling of the first resonant hole and the third resonant hole and the inductive cross coupling of the fourth resonant hole and the sixth resonant hole can be realized, and the transmission zero point appears outside the high-frequency part of the filter, thereby improving the out-of-band suppression of the upper end; the order of the filter can be effectively reduced, so that the size and loss of the filter are reduced, and the application effect is improved; moreover, by increasing the inner diameters of the second and fifth resonance holes, the blocking effect of the second and fifth resonance holes is increased, so that the capacitive coupling between the first and third resonance holes and the fourth and sixth resonance holes is reduced, and the formation of a transmission zero at the high end is facilitated. The bottom of the ceramic dielectric body is provided with a strip-shaped groove by processing, and the surface of the strip-shaped groove is covered by metal, so that the coupling coefficient of the filter can be increased to meet the design requirement of the broadband filter; the coupling coefficient of the filter can be conveniently adjusted by adjusting the depth of the strip-shaped groove. Simple structure, the practicality is strong.
Drawings
FIG. 1 is a perspective view of a preferred embodiment of a high rejection wideband dielectric filter of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a bottom view of FIG. 1;
FIG. 4 is a rear view of FIG. 1;
FIG. 5 is a graph of simulation when the first resonator hole is not in communication with the third resonator hole and the fourth resonator hole is not in communication with the sixth resonator hole;
FIG. 6 is a simulation graph of an embodiment of the present invention.
In the figure: 10. the ceramic dielectric body, 11, 12, second, 13, third, 14, fourth, 15, fifth, 16, sixth, 17, first, 18, second, 21, top electrode, 22, first input/output electrode, 23, first connecting section, 24, second input/output electrode, 25, second connecting section, 26, ground electrode, 27, isolation belt.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, 2, 3 and 4, a preferred embodiment of the high-rejection wideband dielectric filter of the present invention includes a ceramic dielectric body 10, wherein a first resonant hole 11, a second resonant hole 12, a third resonant hole 13, a fourth resonant hole 14, a fifth resonant hole 15 and a sixth resonant hole 16 are sequentially formed on the top surface of the ceramic dielectric body 10 along the length direction, and the axes of the first resonant hole 11, the second resonant hole 12, the third resonant hole 13, the fourth resonant hole 14, the fifth resonant hole 15 and the sixth resonant hole 16 are preferably perpendicular to the top surface of the ceramic dielectric body 10. The walls of each resonance hole are formed with a metal layer (preferably silver) through metallization, the opening of each resonance hole at the top surface is formed with a top surface electrode 21 through metallization, and each resonance hole and a medium filled around the resonance hole and the corresponding top surface electrode 21 form a dielectric resonator.
In order to facilitate the coupling between the resonance holes, the diameter of the second resonance hole 12 is larger than the diameters of the first resonance hole 11 and the third resonance hole 13; the fifth resonance hole 15 has a diameter larger than the diameters of the fourth resonance hole 14 and the sixth resonance hole 16. It is preferable that the diameters of the first, third, fourth and sixth resonance holes 11, 13, 14 and 16 are the same, and the diameters of the second and fifth resonance holes 12 and 15 are the same. By increasing the diameters of the second and fifth resonance holes 12, 15, the coupling of the first and third resonance holes 11, 13 with the second resonance hole 12 and the coupling of the fourth and sixth resonance holes 14, 16 with the fifth resonance hole 15 can be better achieved.
In order to increase the coupling coefficient of the filter and form a transmission zero point, a first bar-shaped groove 17 and a second bar-shaped groove 18 are sequentially formed on the bottom surface of the ceramic dielectric body 10 along the length direction, preferably, one end of the first bar-shaped groove 17 away from the second bar-shaped groove 18 and one end of the second bar-shaped groove 18 away from the first bar-shaped groove 17 respectively penetrate through the side surfaces of the corresponding ends of the ceramic dielectric body 10; the walls of the first and second grooves 17 and 18 are each formed with a metal layer by a metallization process. The first, second and third resonance holes 11, 12 and 13 are all communicated with the first bar-shaped groove 17, and the fourth, fifth and sixth resonance holes 14, 15 and 16 are all communicated with the second bar-shaped groove 18. Preferably, the lower orifices of the first resonant hole 11 and the second resonant hole 12 are located on the top surface of the first bar-shaped groove 17, and the width of the first bar-shaped groove 17 is equal to the diameter of the second resonant hole 12; the lower orifices of the fifth resonant hole 15 and the sixth resonant hole 16 are positioned on the top surface of the second strip-shaped groove 18, and the width of the second strip-shaped groove 18 is equal to the diameter of the fifth resonant hole 15; the third resonance hole 13 and the fourth resonance hole 14 respectively penetrate through the bottom surface of the ceramic dielectric body 10, a notch communicated with the first bar-shaped groove 17 is arranged on the hole wall of the third resonance hole 13, and a notch communicated with the second bar-shaped groove 18 is arranged on the hole wall of the fourth resonance hole 14.
The ceramic dielectric body 10 is formed with a ground electrode 26, a first input/output electrode 22 and a second input/output electrode 24 by metallization, and a separator 27 is disposed between the ground electrode 26 and the first input/output electrode 22, the second input/output electrode 24 and each top electrode 21. The first input/output electrode 22 is connected to the top electrode 21 corresponding to the first resonant hole 11 through a first connection section 23, and the second input/output electrode 24 is connected to the top electrode 21 corresponding to the sixth resonant hole 16 through a second connection section 25.
The first resonant hole 11 and the corresponding top surface electrode 21 thereof, the second resonant hole 12 and the corresponding top surface electrode 21 thereof, the third resonant hole 13 and the corresponding top surface electrode 21 thereof, the first bar-shaped groove 17 and the first input/output electrode 22 form a first resonant assembly, the fourth resonant hole 14 and the corresponding top surface electrode 21 thereof, the fifth resonant hole 15 and the corresponding top surface electrode 21 thereof, the sixth resonant hole 16 and the corresponding top surface electrode 21 thereof, the second bar-shaped groove 18 and the second input/output electrode 24 form a second resonant assembly, and preferably the first resonant assembly and the second resonant assembly are symmetrically arranged; thus, the first input/output electrode 22 is used as an input end, and the second input/output electrode 24 is used as an output end; the second input/output electrode 24 may be used as an input terminal, and the first input/output electrode 22 may be used as an output terminal.
In this embodiment, the bottom of the ceramic dielectric body 10 is provided with the strip-shaped groove by processing, the surface of the strip-shaped groove is covered by metal, the coupling coefficient of the filter is increased, and the coupling coefficient can be adjusted by adjusting the height of the strip-shaped groove, so that the design requirement of the broadband filter is met.
In addition, the first resonant hole 11 and the third resonant hole 13 are communicated through the first strip-shaped groove 17, the fourth resonant hole 14 and the sixth resonant hole 16 are communicated through the second strip-shaped groove 18, so that the inductive cross coupling of the first resonant hole 11 and the third resonant hole 13 and the inductive cross coupling of the fourth resonant hole 14 and the sixth resonant hole 16 can be realized, the out-of-band transmission zero point of the high-frequency part of the filter appears, and the out-of-band suppression of the high-end band is improved; further, by increasing the inner diameters of the second and fifth resonance holes 12 and 15, the blocking effect of the second and fifth resonance holes 12 and 15 is increased to reduce the capacitive coupling between the first and third resonance holes 11 and 13 and the fourth and sixth resonance holes 14 and 16, which is more advantageous for forming a transmission zero at the high end. As shown in fig. 5, when the first resonator hole 11 is not in communication with the third resonator hole 13 and the fourth resonator hole 14 is not in communication with the sixth resonator hole 16, there is only one transmission zero at the low end and the out-of-band suppression at the high end is poor. As shown in fig. 6, after the first resonator hole 11 communicates with the third resonator hole 13 and the fourth resonator hole 14 communicates with the sixth resonator hole 16, a transmission zero is formed at the high end of the passband, and the high-end out-of-band suppression is improved by 15dB or more.
The undescribed portions of the invention are consistent with the prior art and are not described in detail herein.
The foregoing is only the embodiments of the present invention, and therefore, the patent scope of the invention is not limited thereto, and all equivalent structures made by the description of the invention and the accompanying drawings are directly or indirectly applied to other related technical fields, which are all within the scope of the invention.
Claims (7)
1. The high-suppression broadband dielectric filter comprises a ceramic dielectric body, and is characterized in that a first resonant hole, a second resonant hole, a third resonant hole, a fourth resonant hole, a fifth resonant hole and a sixth resonant hole are sequentially formed in the top surface of the ceramic dielectric body along the length direction, a metal layer is formed on the hole wall of each resonant hole through metallization, a top surface electrode is formed at the hole opening of the top surface of each resonant hole through metallization, the metal layer of the hole wall of each resonant hole is respectively connected with the corresponding top surface electrode, and each resonant hole and a medium filled around the resonant hole and the corresponding top surface electrode form a dielectric resonator;
the axes of the first resonant hole, the second resonant hole, the third resonant hole, the fourth resonant hole, the fifth resonant hole and the sixth resonant hole are perpendicular to the top surface of the ceramic dielectric body; the diameter of the second resonance hole is larger than that of the first resonance hole and the third resonance hole; the diameter of the fifth resonance hole is larger than the diameters of the fourth resonance hole and the sixth resonance hole;
a first strip-shaped groove and a second strip-shaped groove are sequentially formed in the bottom surface of the ceramic dielectric body along the length direction, and metal layers are formed on the groove walls of the first strip-shaped groove and the second strip-shaped groove through metallization treatment; the first resonant hole, the second resonant hole and the third resonant hole are communicated with the first strip-shaped groove, and the fourth resonant hole, the fifth resonant hole and the sixth resonant hole are communicated with the second strip-shaped groove;
the ceramic dielectric body is provided with a ground electrode, a first input/output electrode and a second input/output electrode through metallization treatment, and isolation belts are arranged among the ground electrode, the first input/output electrode, the second input/output electrode and each top surface electrode.
2. The high rejection wideband dielectric filter of claim 1, wherein the first, third, fourth and sixth resonator holes have the same diameter, and the second and fifth resonator holes have the same diameter.
3. The high rejection wideband dielectric filter of claim 2, wherein the widths of the first and second slots are equal to the diameters of the second and fifth resonant holes.
4. The high rejection wideband dielectric filter of claim 1, wherein the end of the first stripe groove remote from the second stripe groove and the end of the second stripe groove remote from the first stripe groove extend through the sides of the corresponding end of the ceramic dielectric body, respectively.
5. The high rejection wideband dielectric filter of claim 1, wherein the lower apertures of the first and second resonator holes are each located on the top surface of the first bar slot, and the lower apertures of the fifth and sixth resonator holes are each located on the top surface of the second bar slot; the third resonance hole and the fourth resonance hole penetrate through the bottom surface of the ceramic dielectric body respectively, a notch communicated with the first strip-shaped groove is formed in the hole wall of the third resonance hole, and a notch communicated with the second strip-shaped groove is formed in the hole wall of the fourth resonance hole.
6. The high rejection wideband dielectric filter of claim 5, wherein the first input-output electrode is connected to the top electrode corresponding to the first resonator hole by a first connection segment, and the second input-output electrode is connected to the top electrode corresponding to the sixth resonator hole by a second connection segment.
7. The high rejection broadband dielectric filter according to any one of claims 1 to 6, wherein the first resonator hole and its corresponding top electrode, the second resonator hole and its corresponding top electrode, the third resonator hole and its corresponding top electrode, and the first slot form a first resonator assembly, the fourth resonator hole and its corresponding top electrode, the fifth resonator hole and its corresponding top electrode, the sixth resonator hole and its corresponding top electrode, and the second slot form a second resonator assembly, and the first resonator assembly and the second resonator assembly are symmetrically arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110679488.5A CN113258232B (en) | 2021-06-18 | 2021-06-18 | High rejection broadband dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110679488.5A CN113258232B (en) | 2021-06-18 | 2021-06-18 | High rejection broadband dielectric filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113258232A CN113258232A (en) | 2021-08-13 |
| CN113258232B true CN113258232B (en) | 2024-03-12 |
Family
ID=77188643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110679488.5A Active CN113258232B (en) | 2021-06-18 | 2021-06-18 | High rejection broadband dielectric filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113258232B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115714247B (en) * | 2022-11-23 | 2024-04-12 | 中国电子科技集团公司第二十六研究所 | Miniaturized high-rectangular cavity filter |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4823098A (en) * | 1988-06-14 | 1989-04-18 | Motorola, Inc. | Monolithic ceramic filter with bandstop function |
| KR20020031955A (en) * | 2000-10-25 | 2002-05-03 | 이창화 | Dielectric Filters |
| KR20020076865A (en) * | 2001-03-30 | 2002-10-11 | 성규제 | Microwave Bandpass Filter Using Cross-coupling |
| CN204348875U (en) * | 2015-01-07 | 2015-05-20 | 合肥恒青电子技术有限公司 | A kind of Ceramic Dielectric Filter with absorbing resonant cavity |
| 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 |
| CN204966640U (en) * | 2015-07-16 | 2016-01-13 | 深圳乾瀚科技有限公司 | Low frequency broadband dielectric filter and duplexer |
| CN206541910U (en) * | 2017-01-12 | 2017-10-03 | 苏州捷频电子科技有限公司 | Ceramic dielectric filter |
| CN109037865A (en) * | 2018-09-28 | 2018-12-18 | 西南应用磁学研究所 | A kind of novel medium interdigital filter |
| CN110071350A (en) * | 2019-05-23 | 2019-07-30 | 嘉兴佳利电子有限公司 | Dielectric filter |
| CN111816962A (en) * | 2020-08-11 | 2020-10-23 | 中国电子科技集团公司第二十六研究所 | Electromagnetic hybrid coupling structure of dielectric filter and communication equipment |
| CN112086718A (en) * | 2020-09-21 | 2020-12-15 | 中国电子科技集团公司第二十六研究所 | High-frequency integrated dielectric filter based on half-wavelength resonator two-end open circuit structure |
| CN212230588U (en) * | 2020-08-11 | 2020-12-25 | 西安烽矩电子科技有限公司 | Dielectric waveguide filter |
| CN214672909U (en) * | 2021-06-18 | 2021-11-09 | 中国电子科技集团公司第二十六研究所 | High-suppression broadband dielectric filter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10153532B2 (en) * | 2016-12-20 | 2018-12-11 | Cirocomm Technology Corp. | Filter structure improvement |
-
2021
- 2021-06-18 CN CN202110679488.5A patent/CN113258232B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4823098A (en) * | 1988-06-14 | 1989-04-18 | Motorola, Inc. | Monolithic ceramic filter with bandstop function |
| KR20020031955A (en) * | 2000-10-25 | 2002-05-03 | 이창화 | Dielectric Filters |
| KR20020076865A (en) * | 2001-03-30 | 2002-10-11 | 성규제 | Microwave Bandpass Filter Using Cross-coupling |
| CN204348875U (en) * | 2015-01-07 | 2015-05-20 | 合肥恒青电子技术有限公司 | A kind of Ceramic Dielectric Filter with absorbing resonant cavity |
| 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 |
| CN204966640U (en) * | 2015-07-16 | 2016-01-13 | 深圳乾瀚科技有限公司 | Low frequency broadband dielectric filter and duplexer |
| CN206541910U (en) * | 2017-01-12 | 2017-10-03 | 苏州捷频电子科技有限公司 | Ceramic dielectric filter |
| CN109037865A (en) * | 2018-09-28 | 2018-12-18 | 西南应用磁学研究所 | A kind of novel medium interdigital filter |
| CN110071350A (en) * | 2019-05-23 | 2019-07-30 | 嘉兴佳利电子有限公司 | Dielectric filter |
| CN111816962A (en) * | 2020-08-11 | 2020-10-23 | 中国电子科技集团公司第二十六研究所 | Electromagnetic hybrid coupling structure of dielectric filter and communication equipment |
| CN212230588U (en) * | 2020-08-11 | 2020-12-25 | 西安烽矩电子科技有限公司 | Dielectric waveguide filter |
| CN112086718A (en) * | 2020-09-21 | 2020-12-15 | 中国电子科技集团公司第二十六研究所 | High-frequency integrated dielectric filter based on half-wavelength resonator two-end open circuit structure |
| CN214672909U (en) * | 2021-06-18 | 2021-11-09 | 中国电子科技集团公司第二十六研究所 | High-suppression broadband dielectric filter |
Non-Patent Citations (3)
| Title |
|---|
| Wideband slot-coupled dielectric resonator based filter;Ke Bi et al.;《Journal of Alloys and Compounds》;20190515;第785卷;全文 * |
| 多模介质腔体谐振器及滤波器的研究;蒋帅;《万方学术》;20180929;全文 * |
| 高带外抑制特性微波陶瓷波导滤波器的设计;梁飞等;《通信学报》;20210319;第42卷(第4期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113258232A (en) | 2021-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209766609U (en) | Symmetrical zero structure of dielectric waveguide filter and filter thereof | |
| CN113258232B (en) | High rejection broadband dielectric filter | |
| CN214672909U (en) | High-suppression broadband dielectric filter | |
| JP3387422B2 (en) | Antenna duplexer and communication device | |
| CN109980327B (en) | A tunable dual-mode bandpass filter with high selectivity and constant bandwidth | |
| KR19980079948A (en) | Dielectric Filters, Dielectric Duplexers and Manufacturing Methods Thereof | |
| US6646524B1 (en) | Dielectric filter, dielectric duplexer, and communication apparatus | |
| CN212571286U (en) | Filter and communication base station | |
| JP2001111304A (en) | Dielectric filter and dielectric duplexer and communication equipment | |
| GB2379559A (en) | Dielectric filter with through-holes branching into two legs | |
| JPH03108801A (en) | Dielectric filter | |
| CN111834710B (en) | Filters and communication base stations | |
| KR100411202B1 (en) | Dielectric Filter, Dielectric Duplexer, and Communication Equipment System | |
| JP2000165106A (en) | Dielectric filter, duplexer and communication equipment | |
| CN214411478U (en) | Dielectric filter | |
| KR100456039B1 (en) | Dielectric filter, dielectric duplexer, and communication device | |
| KR101681899B1 (en) | Dielectric filter | |
| KR100290292B1 (en) | Dielectric ceramic resonators and dielectric filters using same 8 | |
| KR100557305B1 (en) | Microstrip Dielectric Filters | |
| KR100330685B1 (en) | Monoblock dielectric filter with an attenuation pole | |
| JP3009331B2 (en) | Broadband dielectric filter | |
| JPH0823203A (en) | Stripline filter | |
| JPH051122Y2 (en) | ||
| KR100401960B1 (en) | Dielectric filter and communication system | |
| KR100344228B1 (en) | resonance coupled dielectric 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 |