CN109962325B - An all-dielectric hybrid resonance structure and filter - Google Patents
An all-dielectric hybrid resonance structure and filter Download PDFInfo
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- CN109962325B CN109962325B CN201711402359.1A CN201711402359A CN109962325B CN 109962325 B CN109962325 B CN 109962325B CN 201711402359 A CN201711402359 A CN 201711402359A CN 109962325 B CN109962325 B CN 109962325B
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
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- 230000007547 defect Effects 0.000 description 3
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- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
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- 230000005684 electric field Effects 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
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- 239000007769 metal material Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
-
- 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
- H01P1/207—Hollow waveguide filters
-
- 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
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
-
- 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
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
- H01P1/2084—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
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- 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
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Abstract
The invention discloses an all-dielectric hybrid resonance structure and a filter, which comprise a single-cavity block and dielectric resonance rods arranged in the single-cavity block, wherein the single-cavity block is an all-dielectric single-cavity block, the dielectric resonance rods comprise middle resonance units and end resonance units which are coaxially arranged, at least one end resonance unit is respectively arranged at two ends of the middle resonance unit, the dielectric constant of the middle resonance unit is larger than that of the end resonance unit, and the dielectric constant of the middle resonance unit is larger than that of the all-dielectric single-cavity block. The invention has simple structure and can meet the requirements of the cavity dielectric filter on higher Q value and smaller volume.
Description
Technical Field
The invention relates to a resonant structure and a filter, belongs to the technical field of passive antenna feeder devices in the field of wireless network communication, and particularly relates to an all-dielectric hybrid resonant structure for a filter and the filter.
Background
With the rapid development of fourth generation mobile communication to fifth generation mobile communication, the requirements for high performance and miniaturization of communication equipment are increasing, and the use of dielectric filters is gradually and frequently started. The conventional TM mode dielectric filter mostly adopts a single dielectric constant resonance mode, and the single dielectric resonator is grounded up and down to compress the volume in the height direction, but the Q value after the volume compression is not advantageous compared with that of the metal cavity filter with the same volume, so that the insertion loss of the filter is not reduced although the dielectric resonator is adopted.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to solve the defects of the background art and provide an all-dielectric hybrid resonant structure and a filter, which have simple structures and can meet the requirements of a cavity dielectric filter on a higher Q value and a smaller volume.
In order to solve the technical problems, the invention adopts an all-dielectric hybrid resonant structure for a filter, which comprises a single-cavity block and a dielectric resonant rod arranged in the single-cavity block, wherein the single-cavity block is an all-dielectric single-cavity block, the dielectric resonant rod comprises a middle resonant unit and end resonant units which are coaxially arranged, at least one end resonant unit is respectively arranged at two ends of the middle resonant unit, the dielectric constant of the middle resonant unit is larger than that of the end resonant unit, and the dielectric constant of the middle resonant unit is larger than that of the all-dielectric single-cavity block.
In a preferred embodiment of the invention, the number of said end resonator elements arranged at both ends of the intermediate resonator element corresponds.
In a preferred embodiment of the invention, each end of the intermediate resonator element is provided with at least two of said end resonator elements, the dielectric constant of said end resonator element closer to the intermediate resonator element being greater than the dielectric constant of said end resonator element further from the intermediate resonator element.
In a preferred embodiment of the invention, the length of the intermediate resonator element is greater than the length of the end resonator element.
In a preferred embodiment of the present invention, the intermediate resonance unit and the end resonance unit are in close contact, or the intermediate resonance unit and the end resonance unit are formed in a split structure, and the intermediate resonance unit and the end resonance unit are integrally formed by splicing.
In a preferred embodiment of the invention, the dielectric resonator rod is provided as a cylinder, a cube or a cuboid, and its interior is provided as a hollow, or its center is provided as a through hole or a blind hole.
In a preferred embodiment of the present invention, the all-dielectric single-cavity block is provided as a cylinder, a cube or a cuboid.
In a preferred embodiment of the invention, the dielectric resonator rod is filled at the inner hole of the all-dielectric single-cavity block and is bonded or crimped with the all-dielectric single-cavity block.
The invention also discloses a filter provided with the all-dielectric mixed resonance structure, which comprises a cavity, a cover plate and a coupling tuning screw, wherein the cover plate is covered above the cavity, the coupling tuning screw is arranged in the cavity, and a plurality of dielectric resonators are arranged in the cavity.
The invention has the advantages that the structure is simple, the installation and the use are convenient, the single cavity block is designed into the all-dielectric single cavity block, the dielectric resonance rod is made into a segmental structure, and the dielectric constant of the dielectric resonance rod of the middle segment is ensured to be larger than that of the dielectric constants of the dielectric resonance rods of other segments and that of the all-dielectric single cavity block, so that the Q value of the single cavity can be effectively improved on the premise of not changing the rest structures of the existing resonators, the Q value of the single cavity is improved by more than 10 percent compared with that of the traditional TM single dielectric constant resonator, and double modes and multiple modes can be formed under specific shape and size combination compared with the traditional TM single mode, and the volume of the single dielectric constant resonator is greatly reduced by 1/3 or more compared with that of the TM double-end single dielectric constant resonator; the invention can adjust the quantity of end resonance units at two ends of the middle resonance unit according to the requirement on the premise of maintaining the total height of the resonance rod, thereby effectively adjusting the Q value, the invention facilitates the positioning and assembly of the medium resonance rod by integrally processing and forming the middle resonance unit and the end resonance unit, facilitates the control of the Q value of the medium resonance rod by adopting split processing and forming the middle resonance unit and the end resonance unit, the shapes of the middle resonance unit and the end resonance unit can be a cylinder, a cuboid, a square body and the like, or the combination of the shapes, the invention can realize temperature compensation by adjusting the material characteristics of the middle resonance unit in order to meet the requirement on the change of the environment temperature and the reliability, the electrical property of the medium resonance unit is more stable in the whole temperature environment, the end resonance unit can use elastic materials in order to enhance the reliability of the structure, the filter with the mixed medium resonant structure has the advantages that the filter is free from failure caused by different expansion coefficients of different materials when the ambient temperature changes rapidly, the inner wall of the cavity is made of metal, aluminum, copper, steel and the like can be adopted, non-metal materials such as plastics, composite materials and the like can be used for enabling the inner wall of the cavity to have conductivity through silver and copper electroplating, the electric field strength is maximum through simulation on the side face of the cavity, a heat dissipation device can be considered to be added on the side face of the cavity under the environment of high temperature and high power for a long time, heat dissipation teeth and the cavity are integrally die-cast, and heat dissipation fins can be independently arranged outside the cavity to reduce the temperature inside and outside the whole cavity.
Drawings
FIG. 1 is an exploded view of an all-dielectric hybrid resonant structure according to an embodiment of the present invention;
FIG. 2 is a front view of an all-dielectric hybrid resonant structure according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of an all-dielectric hybrid resonant structure according to an embodiment of the present invention;
Fig. 4 is a top view of an all-dielectric hybrid resonant structure according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention can be seen from the structural schematic diagram of an all-dielectric mixed resonance structure shown in the attached drawing of the specification, the invention comprises a single-cavity block and a dielectric resonance rod 1 arranged in the single-cavity block, wherein the single-cavity block is an all-dielectric single-cavity block 4, five sides of the all-dielectric single-cavity block 4 are coated with silver, one side of the single-cavity block is not coated with silver, a circuit can be printed on the surface of the single-cavity block for adjusting signal input and output and frequency and coupling, the dielectric resonance rod 1 comprises a middle resonance unit 2 and an end resonance unit 3 which are coaxially arranged, the single-cavity block is an all-dielectric single-cavity block 4, the middle resonance unit 2 and the end resonance unit 3 can be made of materials with different dielectric constants, such as ceramic, plastic and the like, at least one end resonance unit 3 is arranged at two ends of the middle resonance unit 2, and the dielectric constant of the middle resonance unit 2 is larger than that of the end resonance unit 3, and the dielectric constant of the middle resonance unit 2 is larger than that of the whole-dielectric single-cavity block 4. It should be noted that, under the premise of ensuring the overall height of the intermediate resonant unit 2 and the dielectric resonant rod 1, the end resonant units 3 may be disposed at two ends of the intermediate resonant unit 2 according to the Q value, and the end resonant units 3 generally disposed at two ends of the intermediate resonant unit 2 may be symmetrically disposed and symmetrically increased, but the end resonant units 3 at one end may be further divided into a plurality of segments, which falls within the scope of the present invention, and meanwhile, the dielectric constants of all the end resonant units 3 are smaller than the dielectric constant of the intermediate resonant unit 2, the lengths of all the end resonant units 3 are smaller than the length of the intermediate resonant unit 2, the dielectric constants of the end resonant units 3 near the intermediate resonant unit 2 are larger than the dielectric constants of the end resonant units 3 far from the intermediate resonant unit 2, and so on, the dielectric constants of the end resonant units 3 contacting the bottom of the cavity and the inner surface of the cover plate are the smallest.
The forming of the dielectric resonance rod 1 comprises two schemes, namely 1. An integral scheme is that the middle resonance unit 2 and the end resonance units 3 are formed by adopting an integral structure, namely, are formed by adopting a die for integral casting, and the dielectric constants of the units are changed by adding materials with different dielectric constants at specified positions in the die.
2. The split type scheme is that the middle resonance unit 2 and the end resonance unit 3 are formed by adopting split type structures, and the middle resonance unit 2 and the end resonance unit 3 are connected into an integral structure through splicing.
Whether an integrated scheme or a split scheme is adopted, all the medium single cavity block 4, the middle resonance unit 2 and the end resonance unit 3 can be in one of a cylinder, a cuboid, a cube and the like, meanwhile, each of the middle resonance unit 2 and the end resonance unit 3 can be solid or hollow, the whole medium single cavity block 4 and the resonance rod can be combined in a crossing mode, for example, a cylinder medium rod is arranged in the cuboid or the cube single cavity, or the cuboid medium rod is arranged in the cuboid or the cube single cavity and the like, air is arranged between the medium combined resonance rod and the inner wall of the cavity, the medium rod and the single cavity can form double modes and multiple modes under specific sizes and shapes, the dielectric constants of the materials of the middle resonance unit 2 and the end resonance unit 3 are different, and the middle resonance unit 2 is in a solid cylinder or hollow sleeve shape. The end resonance unit 3 is a solid cylinder or a hollow sleeve. The end resonator element 3 is made of a dielectric material, preferably an elastic material. The medium resonance rod 1 is filled in the inner hole of the all-medium single-cavity block 4 and is bonded or crimped with the all-medium single-cavity block 4, and the end resonance units 3 positioned at the two ends of the medium resonance rod 1 are flush with the end surfaces of the all-medium single-cavity block 4.
The invention also discloses a filter provided with the mixed dielectric resonance structure, which comprises a cavity 4, a cover plate 5 and a coupling tuning screw 6, wherein the cover plate 5 is covered above the cavity 4, the coupling tuning screw 6 is arranged in the cavity 4, a plurality of dielectric resonators are arranged in the cavity 4, the dielectric resonators are an all-dielectric mixed resonance structure for the filter, the lower end face of the mixed dielectric resonance structure is tightly contacted with the bottom of the cavity 4, and the upper end face of the mixed dielectric resonance structure is tightly contacted with the cover plate 5. The inner wall of the cavity 4 is made of metal, and can be made of aluminum, copper, steel and the like, or can be made of plastic, composite materials and other nonmetallic materials, and the inner wall of the cavity can be made to have electric conductivity by means of silver electroplating, copper and the like. The electric field intensity of the side surface of the cavity 4 is the largest, and under the environment of long-term high temperature and high power, the addition of a heat dissipation device on the side surface of the cavity can be considered, heat dissipation teeth and the cavity can be integrally die-cast, and heat dissipation fins can be independently arranged outside the cavity so as to reduce the internal and external temperature of the whole cavity.
The cover plate structure of the invention can overcome the defects, the Q value of a single cavity can be greatly improved by an upper and lower combined structure of two dielectric rods with different dielectric constants, compared with the Q value of a traditional TM single dielectric constant resonator, the Q value of the single cavity is improved by more than 10 percent, and compared with the traditional TM single dielectric constant resonator, double modes and multiple modes can be formed under specific shape and size combination in the mode, and compared with the TM double-end grounded single dielectric constant resonator, the volume is greatly reduced by 1/3 or more.
In the first embodiment, when the single cavity size is 20×20, the dielectric constant of the whole dielectric block is 43, the dielectric constants of the dielectric rods 1 and 3 are 1.5, the dielectric constant of the dielectric rod 2 is 80, and the diameters of the three dielectric rods are 18.5, the Q value of the mixed single cavity of the dielectric is close to 10000 when the frequency is 1800MHz, and the mixed single cavity is degenerate dual mode.
The Q value of the all-dielectric mixed resonance single cavity realized by the method is more than 10% and above relative to the same-volume same-frequency TEM mode resonance single cavity.
In the second embodiment, in a single cavity with a size of 20 x 20, a dielectric constant of 43 for the whole dielectric block, a dielectric constant of 3 for the dielectric rods 1 and 3, dielectric rods 4 and 5 have a dielectric constant of 1, dielectric rod 2 has a dielectric constant of 80, and when the diameter of the 5 media rods is 18.5, the Q value of the single cavity of the media mixture is close to 10000 when the frequency is 1800MHz, and the media mixture is degenerate dual-mode, the Q value tested by the implementation is not greatly different from the Q value tested by the implementation, but the cost and the complexity of assembly are increased.
The Q value of the all-dielectric mixed resonance single cavity realized by the method is more than 10% and above relative to the same-volume same-frequency TEM mode resonance single cavity.
It should be understood that the foregoing is only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that may be easily contemplated by those skilled in the art within the scope of the present invention are intended to be included in the scope of the present invention.
Claims (9)
1. The all-dielectric hybrid resonance structure comprises a single cavity block and dielectric resonance rods (1) arranged in the single cavity block, and is characterized in that the single cavity block is an all-dielectric single cavity block (4), each dielectric resonance rod (1) comprises an intermediate resonance unit (2) and end resonance units (3) which are coaxially arranged, the end resonance units (3) are respectively arranged at two ends of the intermediate resonance unit (2), the dielectric constant of the intermediate resonance unit (2) is larger than that of the end resonance units (3), the dielectric constant of the intermediate resonance unit (2) is larger than that of the all-dielectric single cavity block (4), the number of the end resonance units (3) arranged at two ends of the intermediate resonance unit (2) corresponds to that of the end resonance units (3), and each end resonance unit (3) close to the intermediate resonance unit (2) is larger than that of the end resonance unit (3) far away from the intermediate resonance unit (2).
2. The all-dielectric hybrid resonant structure according to claim 1, characterized in that the length of the intermediate resonant unit (2) is greater than the length of the end resonant unit (3).
3. The all-dielectric hybrid resonant structure according to claim 1, characterized in that the intermediate resonant unit (2) and the end resonant unit (3) are in close contact.
4. The all-dielectric hybrid resonant structure according to claim 3, wherein the intermediate resonant unit (2) and the end resonant unit (3) are formed in a split type structure, and the intermediate resonant unit (2) and the end resonant unit (3) are integrally formed by splicing.
5. The all-dielectric hybrid resonant structure according to claim 1, wherein the dielectric resonant rod (1) is provided as a cylinder, a cube or a rectangular parallelepiped, and the inside thereof is provided as a hollow.
6. The all-dielectric hybrid resonant structure according to claim 5, wherein the dielectric resonant rod (1) is provided as a cylinder, a cube or a cuboid, and the inside thereof is provided as a through hole or a blind hole at the center.
7. The all-dielectric hybrid resonant structure according to claim 1, characterized in that the all-dielectric single-cavity block (4) is arranged as a cylinder, a cube or a cuboid.
8. The all-dielectric hybrid resonant structure according to claim 1, wherein the dielectric resonant rod (1) is filled in an inner hole of the all-dielectric single-cavity block (4) and is bonded or crimped with the all-dielectric single-cavity block (4).
9. A filter provided with an all-dielectric mixed resonance structure comprises a cavity, a cover plate and a coupling tuning screw, wherein the cover plate is arranged above the cavity, the coupling tuning screw is arranged in the cavity, and a plurality of dielectric resonators are arranged in the cavity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711402359.1A CN109962325B (en) | 2017-12-22 | 2017-12-22 | An all-dielectric hybrid resonance structure and filter |
| PCT/CN2018/079549 WO2019119657A1 (en) | 2017-12-22 | 2018-03-20 | All-dielectric hybrid resonance structure and filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711402359.1A CN109962325B (en) | 2017-12-22 | 2017-12-22 | An all-dielectric hybrid resonance structure and filter |
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| CN109962325A CN109962325A (en) | 2019-07-02 |
| CN109962325B true CN109962325B (en) | 2025-01-28 |
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| WO2024119362A1 (en) * | 2022-12-06 | 2024-06-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Tm mode resonator structure and filter comprising the same |
| CN118487016A (en) * | 2023-02-10 | 2024-08-13 | 中兴通讯股份有限公司 | Single-cavity resonance unit and filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207938787U (en) * | 2017-12-22 | 2018-10-02 | 香港凡谷發展有限公司 | A kind of all dielectric hybrid resonant structure and filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| IT1264648B1 (en) * | 1993-07-02 | 1996-10-04 | Sits Soc It Telecom Siemens | TUNABLE RESONATOR FOR OSCILLATORS AND MICROWAVE FILTERS |
| JP3506013B2 (en) * | 1997-09-04 | 2004-03-15 | 株式会社村田製作所 | Multi-mode dielectric resonator device, dielectric filter, composite dielectric filter, combiner, distributor, and communication device |
| AUPQ487799A0 (en) * | 1999-12-23 | 2000-02-03 | Poseidon Scientific Instruments Pty Ltd | Multi-layer microwave resonator |
| US7075392B2 (en) * | 2003-10-06 | 2006-07-11 | Com Dev Ltd. | Microwave resonator and filter assembly |
| EP1858109A1 (en) * | 2006-05-15 | 2007-11-21 | Matsushita Electric Industrial Co., Ltd. | Dielectric TE dual mode resonator |
| EP1962369B1 (en) * | 2007-02-21 | 2014-06-04 | Panasonic Corporation | Dielectric multimode resonator |
| CN102097670A (en) * | 2011-02-18 | 2011-06-15 | 成都泰格微波技术股份有限公司 | Hybrid TM (Transverse Magnetic) mode dielectric filter |
| CN102903987A (en) * | 2012-10-18 | 2013-01-30 | 江苏贝孚德通讯科技股份有限公司 | Metal coaxial filter |
| BR112016011287B1 (en) * | 2013-11-18 | 2022-03-15 | Huawei Technologies Co., Ltd | RESONATOR, FILTER, DUPLEXER AND MULTIPLEXER |
| CN103594767B (en) * | 2013-11-23 | 2015-10-21 | 中国电子科技集团公司第三十八研究所 | A kind of integrated cavity body filter |
| CN105896001A (en) * | 2014-10-14 | 2016-08-24 | 北京空间飞行器总体设计部 | Satellite-borne S-band duplexer |
| CN207677042U (en) * | 2017-12-15 | 2018-07-31 | 香港凡谷發展有限公司 | A kind of cavity blending agent resonance structure and filter for filter |
| CN207719375U (en) * | 2017-12-21 | 2018-08-10 | 香港凡谷發展有限公司 | A kind of cavity metal medium bar hybrid resonant structure and filter |
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- 2017-12-22 CN CN201711402359.1A patent/CN109962325B/en active Active
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| CN207938787U (en) * | 2017-12-22 | 2018-10-02 | 香港凡谷發展有限公司 | A kind of all dielectric hybrid resonant structure and filter |
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| WO2019119657A1 (en) | 2019-06-27 |
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