CN211320275U - Hybrid electromagnetic coupling all-dielectric filter - Google Patents
Hybrid electromagnetic coupling all-dielectric filter Download PDFInfo
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- CN211320275U CN211320275U CN202020034253.1U CN202020034253U CN211320275U CN 211320275 U CN211320275 U CN 211320275U CN 202020034253 U CN202020034253 U CN 202020034253U CN 211320275 U CN211320275 U CN 211320275U
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
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Abstract
The utility model is suitable for a dielectric filter technical field provides a mix electromagnetic coupling all dielectric filter, including: a filter body; at least two dielectric resonance units distributed on the filter body; the two input and output ports are arranged on the filter main body and are respectively connected with the heads and the tails of the at least two dielectric resonance units; at least one coupling window formed by a connection space between the dielectric resonance units for generating magnetic coupling; and the at least one electric coupling blind hole is arranged in the at least one coupling window and is used for generating electric coupling. Therefore, the utility model discloses can produce electric coupling and magnetic coupling simultaneously in a coupling window to can realize elliptic function filtering characteristic under the condition that only has the main coupling route, it is simple to have an implementation, processing convenient advantage.
Description
Technical Field
The utility model relates to a dielectric filter technical field especially relates to a mix electromagnetic coupling all dielectric filter
Background
The all-dielectric filter is well applied to a 5G communication system due to the extremely small overall dimension, but with the continuous development of a multi-frequency integration technology, the requirements on the volume and the passband selection characteristic of the all-dielectric filter are higher and higher. Therefore, how to improve the passband selection characteristics of the all-dielectric filter is a problem to be solved urgently in the development of the all-dielectric filter at present.
According to the coupled resonator filter theory: coupling is required to be generated between the resonance units to realize the passband filtering characteristic, and the coupling is divided into electric coupling and magnetic coupling. In the design of the conventional all-dielectric filter, the coupling between the resonant units mostly adopts a single coupling mode, or is similar to the single coupling mode, and a mixed coupling with two coupling modes of electric coupling and magnetic coupling is rarely adopted. Therefore, in the prior art, the elliptic function filtering characteristic is realized by adopting the cross coupling of a single coupling mode, and then the passband selection characteristic of the all-dielectric filter is improved. However, the prior art scheme needs three resonance units to implement the resonant circuit, and has the disadvantages of large volume and complex structure.
As can be seen, the conventional method has many problems in practical use, and therefore, needs to be improved.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned defect, the utility model aims to provide a mix electromagnetic coupling all dielectric filter can improve all dielectric filter's passband selective characteristics, has the advantage of less volume and easy processing.
In order to achieve the above object, the present invention provides a hybrid electromagnetic coupling all-dielectric filter, including:
a filter body;
at least two dielectric resonance units distributed on the filter body;
the two input and output ports are arranged on the filter main body and are respectively connected with the heads and the tails of the at least two dielectric resonance units;
at least one coupling window formed by a connection space between the dielectric resonance units for generating magnetic coupling;
and the at least one electric coupling blind hole is arranged in the at least one coupling window and is used for generating electric coupling.
According to the hybrid electromagnetic coupling all-dielectric filter, at least one through hole for separating electric coupling and magnetic coupling is arranged on the coupling window.
According to the hybrid electromagnetic coupling all-dielectric filter, the through holes are circular holes or elongated holes.
According to the hybrid electromagnetic coupling all-dielectric filter, the top of each dielectric resonance unit is provided with a tuning blind hole for adjusting the resonance frequency, and the two input and output ports are respectively connected to the head and tail bottoms of at least two dielectric resonance units.
According to the hybrid electromagnetic coupling all-dielectric filter, the tuning blind hole and/or the electric coupling blind hole are cylindrical or prismatic.
According to the hybrid electromagnetically coupled all-dielectric filter, the filter body is made of a dielectric material.
According to the hybrid electromagnetically coupled all-dielectric filter, the filter body is made of a ceramic material.
According to the hybrid electromagnetic coupling all-dielectric filter, a metal coating is attached to the outer surface of the filter body.
According to the hybrid electromagnetic coupling all-dielectric filter, the metal coating is a silver coating.
Mix the all dielectric filter of electromagnetic coupling including: a filter body; at least two dielectric resonance units distributed on the filter body; the two input and output ports are arranged on the filter main body and are respectively connected with the heads and the tails of the at least two dielectric resonance units; at least one coupling window formed by a connection space between the dielectric resonance units for generating magnetic coupling; and the at least one electric coupling blind hole is arranged in the at least one coupling window and is used for generating electric coupling. Therefore, the utility model discloses the magnetic coupling that coupling window itself produced and the electric coupling that the electric coupling blind hole produced finally realize mixing electromagnetic coupling to produce a transmission zero point near the passband, improve dielectric filter's passband selective character; while having the advantages of smaller volume and ease of processing.
Drawings
Fig. 1 is a schematic diagram of a hybrid electromagnetic coupling all-dielectric filter according to a first embodiment of the present invention;
fig. 2 is a topological structure diagram of a hybrid electromagnetic coupling all-dielectric filter according to a first embodiment of the present invention;
fig. 3 is a simulation diagram of the hybrid electromagnetic coupling all-dielectric filter according to the first embodiment of the present invention when the electrical coupling is smaller than the magnetic coupling;
fig. 4 is a simulation diagram of the hybrid electromagnetic coupling all-dielectric filter according to the first embodiment of the present invention when the electric coupling is larger than the magnetic coupling;
fig. 5 is a schematic diagram of a hybrid electromagnetic coupling all-dielectric filter according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 shows a hybrid electromagnetically-coupled all-dielectric filter according to a first embodiment of the present invention, which includes a filter main body; the filter comprises a filter body, at least two dielectric resonance units, at least two input/output ports and at least two output ports, wherein the at least two dielectric resonance units are distributed on the filter body; at least one coupling window formed by a connection space between the dielectric resonance units for generating magnetic coupling; at least one blind hole 203 for electrical coupling is disposed in at least one of the coupling windows. Specifically, the present embodiment includes four dielectric resonance units, which are a first dielectric resonance unit 101, a second dielectric resonance unit 102, a third dielectric resonance unit 103, and a fourth dielectric resonance unit 104; the device also comprises three coupling windows, namely a first coupling window 201, a second coupling window 202 and a third coupling window 204; as shown, a first coupling window 201 is formed between the first dielectric resonance unit 101 and the second dielectric resonance unit 102, a second coupling window 202 is formed between the second dielectric resonance unit 102 and the third dielectric resonance unit 103, and a third coupling window 204 is formed between the third dielectric resonance unit 103 and the fourth dielectric resonance unit 104; magnetic coupling can be generated through the coupling window, the magnetic coupling strength is related to the thickness of the coupling window, and the larger the coupling window is, the stronger the magnetic coupling strength is; the smaller the coupling window is, the weaker the magnetic coupling strength is; in this embodiment, an electric coupling blind hole 203 is disposed in the second coupling window 202 for generating electric coupling, that is, electric coupling and magnetic coupling can be simultaneously achieved in the same coupling window; the electric coupling strength is related to the depth of the electric coupling blind hole 203, and within a certain range, the deeper the depth of the electric coupling blind hole 203 is, the weaker the electric coupling strength is; the shallower the depth of the electric coupling blind hole 203, the stronger the electric coupling strength; the coupling window generates magnetic coupling and the electric coupling generated by the electric coupling blind hole 203 realizes hybrid electromagnetic coupling; therefore, in the case that only a main coupling path exists, hybrid electromagnetic coupling is generated between the two resonance units (the second dielectric resonance unit 102 and the third dielectric resonance unit 103) to realize elliptic function filtering characteristics, so that the passband selection characteristics of the all-dielectric filter are improved, and compared with the existing method that hybrid electromagnetic coupling needs to be generated between three resonance units, hybrid electromagnetic coupling is generated between only two resonance units, so that the all-dielectric filter has the characteristics of smaller volume, simpler structure and convenience in processing; the specific topology of this embodiment is shown in fig. 2.
The top of the dielectric resonance unit is provided with a tuning blind hole for adjusting resonance frequency, and the two input and output ports are respectively connected to the head and tail bottoms of at least two dielectric resonance units. The two input and output ports of this embodiment are disposed at the bottoms of the first and last resonant units, that is, at the bottoms of the first dielectric resonant unit 101 and the fourth dielectric resonant unit 104, respectively; the resonant frequency of the filter is related to the depth of the tuning blind hole, and the resonant frequency can be adjusted by adjusting the depth of the tuning blind hole.
The tuning blind hole and/or the electric coupling blind hole 203 are cylindrical or prismatic or other irregular cylindrical shapes and the like. For convenience of production, the present embodiment preferably provides the tuning blind hole and the electrically coupling blind hole 203 as cylindrical shapes.
The filter body is made of a dielectric material, and the filter body is preferably made of a ceramic material; the outer surface of the filter main body is attached with a metal coating, and preferably, the metal coating is a silver coating; that is, the all dielectric filter of the present embodiment is composed of a ceramic dielectric material and a metallic silver layer covering the outer surface of the ceramic dielectric material.
Referring to fig. 3 to 4, the position of the transmission zero generated by the hybrid electromagnetic coupling all-dielectric filter is controllable, when the electric coupling is larger than the magnetic coupling, the transmission zero is generated at the right side of the pass band, and when the electric coupling is smaller than the magnetic coupling, the transmission zero is generated at the left side of the pass band.
Fig. 5 shows a hybrid electromagnetically coupled all-dielectric filter according to a second embodiment of the present invention, including a filter body; the filter comprises a filter body, at least two dielectric resonance units, at least two input/output ports and at least two output ports, wherein the at least two dielectric resonance units are distributed on the filter body; at least one coupling window formed by a connection space between the dielectric resonance units for generating magnetic coupling; at least one blind hole 213 for electrical coupling is disposed in at least one of the coupling windows. The same as the above embodiment, the present embodiment includes four dielectric resonance units, namely, a first dielectric resonance unit 111, a second dielectric resonance unit 112, a third dielectric resonance unit 113, and a fourth dielectric resonance unit 114; three coupling windows, namely a first coupling window 211, a second coupling window 212 and a third coupling window 214; as shown, a first coupling window 211 is formed between the first dielectric resonance unit 111 and the second dielectric resonance unit 112, a second coupling window 212 is formed between the second dielectric resonance unit 112 and the third dielectric resonance unit 113, and a third coupling window 214 is formed between the third dielectric resonance unit 113 and the fourth dielectric resonance unit 114; in this embodiment, an electric coupling blind hole 213 is disposed in the second coupling window 212 for generating electric coupling, i.e. the same coupling window can simultaneously realize electric coupling and magnetic coupling; the coupling window generates magnetic coupling and the electric coupling generated by the electric coupling blind hole 213 realizes hybrid electromagnetic coupling; therefore, in the case that only the main coupling path exists, the hybrid electromagnetic coupling is generated between the two resonant units (the second dielectric resonant unit 112 and the third dielectric resonant unit 113) to realize the elliptic function filtering characteristic, so as to improve the passband selection characteristic of the all-dielectric filter.
The difference from the first embodiment is that at least one through hole 301 for separating electric coupling and magnetic coupling is arranged on the coupling window in the present embodiment; specifically, a through hole 301 is provided on the second coupling window 212, and the arrangement of the through hole 301 can play a role of separating electric coupling and magnetic coupling. The through hole 301 of the present embodiment is a circular hole; of course, in other embodiments, the through hole may be an elongated hole or another through hole.
To sum up, the utility model designs the all-dielectric filter by using the hybrid electromagnetic coupling mode, can realize the elliptic function filtering characteristic only by two resonance units, and compared with the prior technical scheme of introducing cross coupling by using three resonators, the order of the filter is reduced, the insertion loss is lower, and the size is smaller; the position of the transmission zero point generated by the hybrid electromagnetic coupling is controllable: in the passband frequency range, when the electrical coupling is greater than the magnetic coupling, a transmission zero will be generated on the right side of the passband; when the electrical coupling is smaller than the magnetic coupling, a transmission zero will be generated on the left side of the pass band; the utility model provides a full dielectric filter can be under the condition that only has main coupling route, produces mixed electromagnetic coupling between two resonance units and realizes elliptic function filtering characteristic, improves full dielectric filter's passband selective character, and it is littleer to have the volume, and the structure is simpler, the convenient characteristics of processing.
Naturally, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and it is intended that all such changes and modifications be considered as within the scope of the appended claims.
Claims (9)
1. A hybrid electromagnetically coupled all-dielectric filter comprising:
a filter body;
at least two dielectric resonance units distributed on the filter body;
the two input and output ports are arranged on the filter main body and are respectively connected with the heads and the tails of the at least two dielectric resonance units;
at least one coupling window formed by a connection space between the dielectric resonance units for generating magnetic coupling;
and the at least one electric coupling blind hole is arranged in the at least one coupling window and is used for generating electric coupling.
2. The hybrid electromagnetically coupled all-dielectric filter as claimed in claim 1, wherein the coupling window is provided with at least one through hole for separating the electric coupling and the magnetic coupling.
3. The hybrid electromagnetically coupled all-dielectric filter according to claim 2, wherein the through-hole is a circular hole or an elongated hole.
4. The hybrid electromagnetic coupling all-dielectric filter according to claim 1, wherein the top of the dielectric resonator unit is provided with a tuning blind hole for adjusting the resonant frequency, and the two input/output ports are respectively connected to the head and tail bottoms of at least two dielectric resonator units.
5. The hybrid electromagnetically coupled all-dielectric filter as claimed in claim 4, wherein said tuning blind via and/or said electrically coupling blind via is cylindrical or prismatic.
6. The hybrid electromagnetically coupled all-dielectric filter of claim 1 wherein the filter body is made of a dielectric material.
7. The hybrid electromagnetically coupled all-dielectric filter of claim 6 wherein said filter body is made of a ceramic material.
8. The hybrid electromagnetically coupled all-dielectric filter of claim 1, wherein a metal coating is attached to an outer surface of the filter body.
9. The hybrid electromagnetically coupled all-dielectric filter as claimed in claim 8, wherein said metal plating is silver plating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020034253.1U CN211320275U (en) | 2020-01-08 | 2020-01-08 | Hybrid electromagnetic coupling all-dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020034253.1U CN211320275U (en) | 2020-01-08 | 2020-01-08 | Hybrid electromagnetic coupling all-dielectric filter |
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| CN211320275U true CN211320275U (en) | 2020-08-21 |
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| CN202020034253.1U Active CN211320275U (en) | 2020-01-08 | 2020-01-08 | Hybrid electromagnetic coupling all-dielectric filter |
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