CN111384566A - Dielectric resonator, dielectric filter and communication equipment - Google Patents
Dielectric resonator, dielectric filter and communication equipment Download PDFInfo
- Publication number
- CN111384566A CN111384566A CN201910208763.8A CN201910208763A CN111384566A CN 111384566 A CN111384566 A CN 111384566A CN 201910208763 A CN201910208763 A CN 201910208763A CN 111384566 A CN111384566 A CN 111384566A
- Authority
- CN
- China
- Prior art keywords
- dielectric
- face
- dielectric resonator
- hollow
- hollowed
- 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.)
- Withdrawn
Links
Images
Classifications
-
- 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
-
- 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 application provides a dielectric resonator, a dielectric filter and a communication device. The dielectric block is divided into two parts in the direction perpendicular to the length direction, the geometric center of the part where the first end face is located in the first hollowed-out groove, the geometric center of the part where the second end face is located in the second hollowed-out groove, the ratio of the secondary resonance frequency of the dielectric resonator to the fundamental mode resonance frequency is improved, and therefore after the dielectric resonator is applied to the dielectric filter, the out-of-band harmonic characteristic of the dielectric filter is improved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a dielectric resonator, a dielectric filter, and a communication device.
Background
With the rapid advance of communication technology, the application of 5G communication technology is becoming more and more widespread, and as an important component in a 5G communication system, a filter with high integration, miniaturization, light weight and low cost is inevitably required in the 5G communication technology.
In the prior art, a resonator forming a cuboid structure is generally prepared by adopting a ceramic material with a high dielectric constant to form a filter meeting the requirements, but the secondary resonance frequency of the resonator of the structure is close to the resonance frequency of a fundamental mode, and the ratio of the secondary resonance frequency to the fundamental mode is low, so that the far-end out-of-band characteristic of the filter is low.
Disclosure of Invention
The application mainly provides a dielectric resonator, a dielectric filter and communication equipment, and aims to solve the problem that the secondary resonance frequency of the dielectric resonator is close to the resonance frequency of a fundamental mode, the ratio is low, and the far-end out-of-band characteristic of the dielectric filter is low.
In order to solve the technical problem, the application adopts a technical scheme that: there is provided a dielectric resonator comprising: the dielectric block comprises a first end face and a second end face which are arranged at intervals along the length direction, a first side face and a second side face which are arranged at intervals along the width direction, and a third side face and a fourth side face which are arranged at intervals along the thickness direction, and the size of the dielectric block along the length direction is larger than the sizes of the dielectric block along the width direction and the thickness direction; the dielectric block is provided with a first hollowed groove and a second hollowed groove in the adjacent region of the first end face and the adjacent region of the second end face, the dielectric block is equally divided into two parts in the direction perpendicular to the length direction, the geometric center of the part where the first end face is located in the first hollowed groove, and the geometric center of the part where the second end face is located in the second hollowed groove.
In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided a dielectric filter comprising at least two dielectric resonators as described above arranged in cascade.
In order to solve the above technical problem, the present application adopts another technical solution: there is provided a communication device, wherein the communication device comprises the above-mentioned dielectric filter.
The beneficial effect of this application is: be different from prior art's condition, this application sets up first fretwork groove and second fretwork groove respectively in the adjacent region of first terminal surface and the adjacent region of second terminal surface through the dielectric block, and after being divided into two parts at the perpendicular to length direction with the dielectric block equidistribution, the geometric centre of the part at first terminal surface place is located first fretwork inslot, the geometric centre of the part at second terminal surface place is located second fretwork inslot, in order to improve dielectric resonator's secondary resonance frequency and basic mode resonant frequency's ratio, and then make when dielectric resonator is applied to dielectric filter after, improve dielectric filter's outband harmonic characteristic, and simple structure, easily shaping, be fit for mass production.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
fig. 1 is an exploded schematic view of a first embodiment of a dielectric resonator provided herein;
FIG. 2 is a schematic structural view of another embodiment of the dielectric block of FIG. 1;
FIG. 3 is a schematic view of the assembled structure of the dielectric resonator of FIG. 1;
fig. 4 is an exploded view of a second embodiment of a dielectric resonator provided herein;
FIG. 5 is a schematic structural view of another embodiment of the dielectric block of FIG. 4;
fig. 6 is a schematic view of an assembled structure of the dielectric resonator of fig. 4.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is an exploded schematic view of a dielectric resonator 10 according to a first embodiment of the present application, where the dielectric resonator 10 includes a dielectric block 11.
The dielectric block 11 includes a first end surface 111 and a second end surface 112 spaced apart from each other in a length direction, i.e., in an X direction as shown in fig. 1, a first side surface 113 and a second side surface 114 spaced apart from each other in a width direction, i.e., in a Y direction as shown in fig. 1, and a third side surface 115 and a fourth side surface 116 spaced apart from each other in a thickness direction, i.e., in a Z direction as shown in fig. 1.
Optionally, in this embodiment, the dielectric block 11 is disposed in a rectangular parallelepiped, and the first end surface 111, the second end surface 112, the first side surface 113, the second side surface 114, the third side surface 115, and the fourth side surface 116 are disposed on six sides of the rectangular parallelepiped in the above direction, which is not limited herein, of course, in other embodiments, the dielectric block 11 may also be disposed in other regular or irregular shapes.
Further, the dimension of the dielectric block 11 in the length direction is larger than the dimensions in the width direction and the thickness direction.
Alternatively, the size of the dielectric block 11 in the width direction is larger than the size in the thickness direction.
Optionally, the dielectric blocks 11 are symmetrically disposed with respect to a central axis disposed along the length direction and perpendicular to the width direction, and it can be understood that the central axis is a virtual plane disposed for convenience of description.
Optionally, the second end surface 112 is disposed flat.
Optionally, the dielectric block 11 is made of a ceramic material, and the dielectric constant of the ceramic material is high, so that the effective size of the dielectric resonator can be greatly compressed by the compression effect of the ceramic material with high dielectric constant on the microwave wavelength, so that the overall dimension of the dielectric filter is miniaturized, and meanwhile, the ceramic material is easy to mold, so that batch production with low cost can be realized, and therefore the ceramic filter with advantages in miniaturization and integration application is highly matched with the technical requirements of 5G micro base stations (Small Cells) and MIMO systems, and certainly, in other embodiments, the material of the dielectric block 11 can also be made of a material with a dielectric constant similar to that of ceramics.
Further, the dielectric block 11 is provided with the hollow groove 101 in the area adjacent to the first end surface 111, in this embodiment, that is, the hollow groove 101 is provided in the area where at least one of the first side surface 113, the second side surface 114, the third side surface 115 and the fourth side surface 116 of the dielectric block 11 is located, and as shown by the dotted line in fig. 1, after the dielectric block 11 is equally divided into two parts 11a and 11b in the direction perpendicular to the length direction, the geometric center a of the part 11a where the first end surface 111 is located in the hollow groove 101, so as to improve the ratio of the secondary resonance frequency to the fundamental mode resonance frequency of the dielectric resonator 10, thereby improving the out-of-band harmonic characteristic of the dielectric filter after the dielectric resonator 10 is applied to the dielectric filter, and the coupling among the plurality of dielectric resonators 10 does not generate resonance near the passband, further improving the far-end out-of-band characteristic of the dielectric filter to which the dielectric resonator is applied, and the structure is simple, the forming is easy, and the method is suitable for mass production.
Optionally, the hollow-out groove 101 is configured such that a ratio of the secondary resonance frequency of the dielectric resonator 10 to the fundamental mode resonance frequency is not less than 1.5, for example, the ratio of the secondary resonance frequency of the dielectric resonator 10 to the fundamental mode resonance frequency is 1.5, 1.6, 1.7, or the like.
Optionally, the hollow groove 101 communicates with the third side 115 and the fourth side 116, and in this embodiment, the hollow groove 101 further communicates with the first end surface 111.
Optionally, the inner surface of the hollow groove 101 is exposed to the air.
Referring to fig. 2, fig. 2 is a schematic structural view of another embodiment of the dielectric block 11 in fig. 1, in which the hollow groove 101 communicates with the first side 113 and the third side 114, and in the other arrangement, the hollow groove 101 further communicates with the first end 111.
Further referring to fig. 1, the hollow-out grooves 101 are symmetrically disposed with respect to a central axis disposed along the length direction and perpendicular to the width direction.
Optionally, the hollow groove 101 is disposed in a rectangular parallelepiped, and it can be understood that in other embodiments, the hollow groove 101 may also have other shapes.
Further, in the present embodiment, the dielectric resonator 10 further includes an input/output terminal 12 disposed adjacent to the second end surface 112 disposed in a flat manner, that is, the input/output terminal 12 may be disposed on any one of the first side surface 113, the second side surface 114, the third side surface 115, and the fourth side surface 116.
Alternatively, the output/input terminal 12 is in the form of a probe, and in other embodiments, it may also be in the form of a printed circuit board, a microstrip line, or the like.
Referring to fig. 1 and fig. 3 together, fig. 3 is a schematic view illustrating an assembly structure of the dielectric resonator 10 in fig. 1, and the dielectric resonator 10 in this embodiment further includes an electromagnetic shielding layer 13, where the electromagnetic shielding layer 13 covers an outer surface of the dielectric block 11 to implement a shielding function.
Optionally, the electromagnetic shielding layer 13 at least includes shielding cover plates 131 covering the hollow-out grooves 101, in this embodiment, the hollow-out grooves 101 are covered on the third side 115 and the fourth side 116 of the dielectric block 11 by two shielding cover plates 131, and other outer surfaces of the dielectric block 11, on which the shielding cover plates 131 are not disposed, may be coated with a metal including, but not limited to, copper, silver, tin, or aluminum to form a metal coating, and the metal coating and the shielding cover plates 131 together form the electromagnetic shielding layer 13 in this embodiment.
Wherein, be provided with the tuning screw 14 that extends to in the fretwork groove 101 on the shielding apron 131 to adjust the resonant frequency of dielectric resonator 10 through this tuning screw 14, compare in prior art, adjust resonant frequency's mode through polishing electromagnetic shield 13 and dielectric block 11, easy control has improved stability, uniformity and regulation precision, has reduced the sensitivity to the structure size, and has avoided leading to the cracked condition to appear in dielectric resonator 10 through the mode of polishing among the prior art, improves the yield.
Referring to fig. 4, fig. 4 is an exploded schematic view of a second embodiment of the dielectric resonator 20 provided in the present application, where the dielectric resonator 20 in the present embodiment includes a dielectric block 21.
The dielectric block 21 includes a first end surface 211 and a second end surface 212 spaced apart from each other in a length direction, i.e., in an X direction as shown in fig. 4, a first side surface 213 and a second side surface 214 spaced apart from each other in a width direction, i.e., in a Y direction as shown in fig. 4, and a third side surface 215 and a fourth side surface 216 spaced apart from each other in a thickness direction, i.e., in a Z direction as shown in fig. 4.
Optionally, in this embodiment, the dielectric block 21 is disposed in a rectangular parallelepiped, and the first end surface 211, the second end surface 212, the first side surface 213, the second side surface 214, the third side surface 215, and the fourth side surface 216 are respectively disposed on six surfaces of the rectangular parallelepiped in the above-mentioned direction, but in other embodiments, the dielectric block 21 may also be disposed in other regular or irregular shapes, which is not limited herein.
Further, the dimension of the dielectric block 21 in the length direction is larger than the dimensions in the width direction and the thickness direction.
Alternatively, the size of the dielectric block 21 in the width direction is larger than the size in the thickness direction.
Alternatively, the dielectric blocks 21 are symmetrically disposed with respect to a central axis plane disposed along the length direction and perpendicular to the width direction, and it is understood that the central axis plane is a virtual plane disposed for convenience of description.
Optionally, the dielectric block 21 is made of a ceramic material, and the dielectric constant of the ceramic material is high, so that the effective size of the dielectric resonator can be greatly compressed by the compression effect of the ceramic material with high dielectric constant on the microwave wavelength, so that the overall dimension of the dielectric filter is miniaturized, and meanwhile, the ceramic material is easy to mold, so that batch production with low cost can be realized, and therefore, the ceramic filter with advantages in miniaturized and integrated application is highly matched with the technical requirements of 5G micro base stations (Small Cells) and MIMO systems, and certainly, in other embodiments, the dielectric block 21 can also be made of a material with a dielectric constant similar to that of ceramics.
Further, the dielectric block 21 is provided with a first hollow-out groove 201 and a second hollow-out groove 202 in the adjacent area of the first end face 211 and the adjacent area of the second end face 212, and as shown by the dotted line in fig. 4, after the dielectric block 21 is equally divided into two parts 21a and 21B in the direction perpendicular to the length direction, the geometric center B1 of the part 21a where the first end face 211 is located in the first hollow-out groove 201, and the geometric center B2 of the part 21B where the second end face 212 is located in the second hollow-out groove 202, so as to improve the ratio of the secondary resonance frequency to the fundamental mode resonance frequency of the dielectric resonator 20, thereby improving the out-of-band harmonic characteristic of the dielectric filter after the dielectric resonator 20 is applied to the dielectric filter, the coupling among the plurality of dielectric resonators 20 does not generate resonance near the passband, further improving the far-end out-of-band characteristic of the dielectric filter to which the dielectric resonator is applied, and the structure is simple, the forming is easy, and the method is suitable for mass production.
Optionally, the first hollow-out groove 201 and the second hollow-out groove 202 are set such that a ratio of a secondary resonance frequency of the dielectric resonator 20 to a fundamental mode resonance frequency is not less than 1.7, for example, the ratio of the secondary resonance frequency of the dielectric resonator 20 to the fundamental mode resonance frequency is 1.7, 1.8, 1.9, and the like.
Optionally, the first hollow groove 201 and the second hollow groove 202 are respectively communicated with the third side surface 215 and the fourth side surface 216, in this embodiment, the first hollow groove 201 is further communicated with the first end surface 211, and the second hollow groove 202 is further communicated with the second end surface 212.
Referring to fig. 5, fig. 5 is a schematic structural diagram of another embodiment of the dielectric block 21 in fig. 4, in which the first hollow groove 201 and the second hollow groove 202 are respectively communicated with the first side surface 213 and the second side surface 214, and in the another arrangement, the first hollow groove 201 and the second hollow groove 202 are also respectively communicated with the first end surface 211 and the second end surface 212.
Optionally, the inner surfaces of the first hollow-out groove 201 and the second hollow-out groove 202 are exposed to the air.
Further referring to fig. 4, the first hollow-out groove 201 and the second hollow-out groove 202 are symmetrically disposed with respect to a central axis disposed along the length direction and perpendicular to the width direction.
Optionally, the first hollow-out groove 201 and the second hollow-out groove 202 are disposed in a rectangular parallelepiped, and it can be understood that in other embodiments, the first hollow-out groove 201 and the second hollow-out groove 202 may also be in other shapes.
Referring to fig. 4 and fig. 6 together, fig. 6 is a schematic view illustrating an assembly structure of the dielectric resonator 20 in fig. 4, and the dielectric resonator 20 in the present embodiment further includes an electromagnetic shielding layer 22, where the electromagnetic shielding layer 22 covers an outer surface of the dielectric block 21 to implement a shielding function.
Optionally, at least a partial region of the first end surface 211 and the second end surface 212 is not covered with the electromagnetic shielding layer 22, and is further used for coupling with another dielectric resonator, that is, the dielectric resonator 20 in this embodiment may be coupled with another dielectric resonator through the first end surface 211 and the second end surface 212.
Optionally, the electromagnetic shielding layer 22 includes a shielding cover 221 at least covering the first hollow-out groove 201 and the second hollow-out groove 202, in this embodiment, the first hollow-out groove 201 and the second hollow-out groove 202 are covered on the third side 215 and the fourth side 216 of the dielectric block 21 by two shielding covers 221, and other outer surfaces of the dielectric block 21 where the shielding cover 221 is not disposed may be formed by coating a metal including, but not limited to, copper, silver, tin, or aluminum, to form a metal coating, and the metal coating and the shielding cover 221 together form the electromagnetic shielding layer 22 in this embodiment.
The shielding cover plate 221 is provided with a first tuning screw 23 and a second tuning screw 24 which respectively extend to the first hollow-out groove 201 and the second hollow-out groove 202, so that the resonant frequency of the dielectric resonator 20 can be adjusted through the first tuning screw 23 and the second tuning screw 24, and compared with the prior art, the method for adjusting the resonant frequency by polishing the electromagnetic shielding layer 22 and the dielectric block 21 is easy to control, stability, consistency and adjustment precision are improved, sensitivity to the structure size is reduced, the condition that the dielectric resonator 20 is broken due to the polishing mode in the prior art is avoided, and the yield is improved.
The present application further provides a dielectric filter, where the dielectric filter includes the dielectric resonator in any of the above embodiments, which may specifically refer to the description in the above embodiments, and details are not repeated here.
The application also provides a communication device comprising the dielectric filter.
Be different from prior art's condition, this application sets up the fretwork groove in the adjacent region of first terminal surface through the dielectric block, and in perpendicular to length direction with two parts of dielectric block equidistribution and back, the geometric centre of the part at first terminal surface place is located the fretwork inslot, with the ratio of secondary resonance frequency and the basic mode resonant frequency that improves dielectric resonator, and then make when dielectric resonator is applied to dielectric filter after, improve dielectric filter's outband harmonic characteristic, and simple structure, easily shaping, be fit for mass production.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.
Claims (10)
1. A dielectric resonator, characterized in that the dielectric resonator comprises:
the dielectric block comprises a first end face and a second end face which are arranged at intervals along the length direction, a first side face and a second side face which are arranged at intervals along the width direction, and a third side face and a fourth side face which are arranged at intervals along the thickness direction, and the size of the dielectric block along the length direction is larger than the sizes of the dielectric block along the width direction and the thickness direction;
the dielectric block is provided with a first hollowed groove and a second hollowed groove in the adjacent region of the first end face and the adjacent region of the second end face, the dielectric block is equally divided into two parts in the direction perpendicular to the length direction, the geometric center of the part where the first end face is located in the first hollowed groove, and the geometric center of the part where the second end face is located in the second hollowed groove.
2. The dielectric resonator of claim 1, wherein the first and second hollowed-out grooves communicate with the first and second sides, or with the third and fourth sides, respectively.
3. The dielectric resonator according to claim 2, wherein a dimension of the dielectric block in a width direction is larger than a dimension of the dielectric block in a thickness direction, and the first and second hollow grooves communicate with the third and fourth side surfaces, respectively.
4. The dielectric resonator of claim 3, wherein the first hollowed-out groove is further in communication with the first end face and the second hollowed-out groove is further in communication with the second end face.
5. The dielectric resonator of claim 4, wherein the dielectric block, the first hollowed-out groove, and the second hollowed-out groove are symmetrically disposed with respect to a central axis disposed along the length direction and perpendicular to the width direction.
6. The dielectric resonator according to claim 5, wherein the first and second hollow-out grooves are formed in a rectangular parallelepiped shape.
7. The dielectric resonator according to claim 1, further comprising an electromagnetic shielding layer covering an outer surface of the dielectric block, wherein inner surfaces of the first and second hollow-out grooves are exposed to the air, at least partial areas of the first and second end surfaces are not covered with the electromagnetic shielding layer, and are further used for coupling with other dielectric resonators, the electromagnetic shielding layer comprises a shielding cover plate covering at least the first and second hollow-out grooves, and a first tuning screw and a second tuning screw are disposed on the shielding cover plate and extend into the first and second hollow-out grooves.
8. The dielectric resonator according to claim 1, wherein the first and second hollow-out grooves are arranged such that a ratio of a secondary resonance frequency of the dielectric resonator to a fundamental mode resonance frequency is not less than 1.7.
9. A dielectric filter comprising at least two dielectric resonators as claimed in any one of claims 1 to 8 arranged in cascade.
10. A communication device, characterized in that the communication device comprises a dielectric filter according to claim 9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNPCT/CN2018/125886 | 2018-12-29 | ||
| CN2018125886 | 2018-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111384566A true CN111384566A (en) | 2020-07-07 |
Family
ID=71215127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910208763.8A Withdrawn CN111384566A (en) | 2018-12-29 | 2019-03-19 | Dielectric resonator, dielectric filter and communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111384566A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4028650A (en) * | 1972-05-23 | 1977-06-07 | Nippon Hoso Kyokai | Microwave circuits constructed inside a waveguide |
| US4757284A (en) * | 1985-04-04 | 1988-07-12 | Alps Electric Co., Ltd. | Dielectric filter of interdigital line type |
| CN1901272A (en) * | 2006-07-27 | 2007-01-24 | 奥雷通光通讯设备（上海）有限公司 | Capacitive coupling device between medium loading chambers |
| CN104577266A (en) * | 2014-12-29 | 2015-04-29 | 宁波华瓷通信技术有限公司 | Insulation support column installation structure for filter |
| CN104733816A (en) * | 2015-03-30 | 2015-06-24 | 西安电子科技大学 | Band-pass filter based on gap waveguide technology |
| WO2015100597A1 (en) * | 2013-12-31 | 2015-07-09 | 华为技术有限公司 | Dielectric resonator, dielectric filter and communication device |
| CN105742766A (en) * | 2016-03-04 | 2016-07-06 | 嘉兴佳利电子有限公司 | Combined filter employing ceramic resonator grooving and coupling mode |
-
2019
- 2019-03-19 CN CN201910208763.8A patent/CN111384566A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4028650A (en) * | 1972-05-23 | 1977-06-07 | Nippon Hoso Kyokai | Microwave circuits constructed inside a waveguide |
| US4757284A (en) * | 1985-04-04 | 1988-07-12 | Alps Electric Co., Ltd. | Dielectric filter of interdigital line type |
| CN1901272A (en) * | 2006-07-27 | 2007-01-24 | 奥雷通光通讯设备（上海）有限公司 | Capacitive coupling device between medium loading chambers |
| WO2015100597A1 (en) * | 2013-12-31 | 2015-07-09 | 华为技术有限公司 | Dielectric resonator, dielectric filter and communication device |
| CN104577266A (en) * | 2014-12-29 | 2015-04-29 | 宁波华瓷通信技术有限公司 | Insulation support column installation structure for filter |
| CN104733816A (en) * | 2015-03-30 | 2015-06-24 | 西安电子科技大学 | Band-pass filter based on gap waveguide technology |
| CN105742766A (en) * | 2016-03-04 | 2016-07-06 | 嘉兴佳利电子有限公司 | Combined filter employing ceramic resonator grooving and coupling mode |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110474137B (en) | Multilayer three-way power division filter based on SIW | |
| CN106299575B (en) | A kind of Compact type broadband work(filter-divider | |
| CN109449557B (en) | Dielectric resonator block, dielectric waveguide filter and coupling structure thereof | |
| US20010050599A1 (en) | Dielectric filter, antenna duplexer, and communications appliance | |
| CN107579317B (en) | Balun bandpass filter based on the line of rabbet joint and micro-strip multimode resonator | |
| CN105762448B (en) | A kind of controllable hybrid electromagnetic coupling-substrate integral wave guide filter | |
| Xiang et al. | Compact waveguide filters using novel resonant coupling structures | |
| CN111384566A (en) | Dielectric resonator, dielectric filter and communication equipment | |
| CN111384569A (en) | Dielectric resonator, dielectric filter and communication equipment | |
| US20090108962A1 (en) | Dielectric Filter for Base Station Communication Equipment | |
| CN110492208A (en) | The flat coaxial cavity filter of miniaturization | |
| US6960967B2 (en) | Dielectric resonator device, filter, duplexer, and communication apparatus | |
| CN113258246B (en) | Method for manufacturing dielectric filter | |
| CN106486723B (en) | Based on microstrip line-slot line structure ultra-wide band filter | |
| JPH05218705A (en) | Lamination type band elimination filter | |
| CN111384489A (en) | Dielectric filter and communication equipment | |
| CN111384485A (en) | Dielectric filter and communication equipment | |
| CN111384546A (en) | Dielectric filter and communication equipment | |
| EP3324480B1 (en) | Resonator, resonator assembly and filter | |
| CN111384562A (en) | Dielectric resonator, dielectric filter, communication equipment and method for preparing dielectric block | |
| CN213878364U (en) | Integrated dielectric filter | |
| JP4249376B2 (en) | High frequency filter | |
| KR102637786B1 (en) | Micro Waveguide Ultra Wide Band Pass Filter Type Meta Material | |
| Andini et al. | Cascaded Square Loop Bandpass Filter With Transmission Zeros For Long Term Evolution (Lte) | |
| KR102016031B1 (en) | Stepped impedance slot resornator, design method thereof and filter design method with the same |
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 | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200707 |