CN209183692U - Dielectric waveguide filter - Google Patents
Dielectric waveguide filter Download PDFInfo
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- CN209183692U CN209183692U CN201822039384.4U CN201822039384U CN209183692U CN 209183692 U CN209183692 U CN 209183692U CN 201822039384 U CN201822039384 U CN 201822039384U CN 209183692 U CN209183692 U CN 209183692U
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- signal transmission
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- dielectric waveguide
- waveguide filter
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Abstract
The utility model relates to a kind of dielectric waveguide filters, including first medium resonator and second medium resonator.Due to being respectively formed with the first signal transmission passage and second signal transmission channel in first medium resonator and second medium resonator, therefore signal can conduct between first medium resonator and second medium resonator, can form cross-coupling between two resonators.Therefore, at the both ends of above-mentioned dielectric waveguide filter frequency response passband, attenuation pole can be generated, to further improve the frequency selective characteristic of dielectric waveguide filter.Moreover, without additional increase cavity body structure, and need to only carry out the improvement in structure to first medium body and second medium body, therefore volume not will increase when improving selecting frequency characteristic.Therefore, above-mentioned dielectric waveguide filter is conducive to the miniaturization of product.
Description
Technical field
The utility model relates to microwave radio device arts, in particular to a kind of dielectric waveguide filter.
Background technique
Filter is a kind of frequency-selecting device, is the indispensable a part of communication equipment.As the high speed of communication system is sent out
Exhibition enters the 5G epoch, and the miniaturization of device is the key that the development of its communication equipment, and is minimized, high-performance, low-power consumption filtering
Device is the key that 5G device miniaturization again.Dielectric waveguide filter has great advantages compared to traditional waveguide filter,
Therefore it is with a wide range of applications in 5G communication equipment.
The air filling forms of conventional waveguide filter are modified to high dielectric constant ceramic material by dielectric waveguide filter
Filling, ceramic medium material play the role of transmitting signal and structural support by die cast.Metal material is attached to porcelain Jie
Electromagnetic shielding action is played as electric wall in material surface.In order to improve the frequency selective characteristic of dielectric waveguide filter, usually
Pole outside frequency response passband is formed using zero cavity configuration.Zero cavity configuration refers to outside dielectric waveguide filter, increases by one
A resonance frequency passes through the medium single-chamber and input and output connector coupling in the medium single-chamber of high side of filter passband or low side
It closes.
But the number of pole need to be consistent with the number of increased zero chamber, but increased zero chamber causes Medium Wave Guide to be filtered
The size of wave device increases, while increasing weight and cost.Therefore, existing dielectric waveguide filter promotes the side of frequency-selecting feature
Formula is unfavorable for the miniaturization of product.
Utility model content
Based on this, it is necessary to aiming at the problem that existing dielectric waveguide filter is unfavorable for product miniaturization, provide a kind of Jie
Matter waveguide filter.
A kind of dielectric waveguide filter is stacked including first medium resonator and with the first medium resonator
Second medium resonator, the first medium resonator include first medium body and are coated on the first medium external surface
First metallic walls, the second medium resonator include second medium body and are coated on the second of the second medium external surface
Metallic walls, the side of first metallic walls and second metallic walls toward each other are respectively the first contact surface and the second contact
Face；
Wherein, be respectively formed in the first medium body and the second medium body the first signal transmission passage and with institute
State the second signal transmission channel of the first signal transmission passage electrical connection, and first signal transmission passage and second letter
Number transmission channel insulate with first contact surface and second contact surface respectively.
First signal transmission passage and the second signal transmission channel extend through in one of the embodiments,
The first medium body and the second medium body.
First signal transmission passage runs through the first medium body, second letter in one of the embodiments,
Number transmission channel does not run through the second medium body.
First signal transmission passage and the second signal transmission channel do not run through in one of the embodiments,
The first medium body and the second medium body.
First signal transmission passage is coaxially set with the second signal transmission channel in one of the embodiments,
It sets.
First contact surface offers the first window for exposing the first medium body in one of the embodiments,
Mouthful, second contact surface offers the second window for exposing the second medium body, the first window and described second
Window is least partially overlapped, and first signal transmission passage and the second signal transmission channel pass through the first window
And the equitant region of the second window.
The first window and second window are rounded and completely overlapped in one of the embodiments,.
First signal transmission passage and the second signal transmission channel are respectively along vertical in one of the embodiments,
Directly extend in the direction of first contact surface and second contact surface.
First signal transmission passage and the second signal transmission channel are metal in one of the embodiments,
Change duct.
The circular in cross-section in the metallization duct in one of the embodiments,.
Above-mentioned dielectric waveguide filter, due to being respectively formed with first in first medium resonator and second medium resonator
Signal transmission passage and second signal transmission channel, therefore signal can pass between first medium resonator and second medium resonator
It leads, so that forming cross-coupling between the first resonator and the second resonator.Therefore, in above-mentioned dielectric waveguide filter frequency
Rate responds the both ends of passband, can generate attenuation pole, so that the frequency selection for further improving dielectric waveguide filter is special
Property.Moreover, when improving selecting frequency characteristic, without additional increase cavity body structure, and only need to be to first medium body and second medium
Body carries out the improvement in structure, therefore volume not will increase.Therefore, above-mentioned dielectric waveguide filter is conducive to the small-sized of product
Change.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of dielectric waveguide filter in the utility model preferred embodiment；
Fig. 2 is the schematic diagram of the stepped construction of first medium resonator and second medium resonator in one embodiment；
Fig. 3 is the cross-sectional view of stepped construction shown in Fig. 2；
Fig. 4 is the schematic diagram of the stepped construction of first medium resonator and second medium resonator in second embodiment；
Fig. 5 is the cross-sectional view of stepped construction shown in Fig. 4；
Fig. 6 is the schematic diagram of the stepped construction of first medium resonator and second medium resonator in third embodiment；
Fig. 7 is the cross-sectional view of stepped construction shown in Fig. 6；
Fig. 8 is the frequency response curve of dielectric waveguide filter in the utility model preferred embodiment.
Specific embodiment
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms
It realizes, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes to the utility model
The understanding of disclosure is more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes
Any and all combinations of one or more related listed items.
Referring to Fig. 1, the dielectric waveguide filter 100 in the utility model preferred embodiment includes first medium resonator
110 and second medium resonator 120.
First medium resonator 110 is stacked with second medium resonator 120.Dielectric waveguide filter 100 is generally wrapped
Multiple dielectric resonators are included, multiple dielectric resonator can be divided into two layers or two layers or more and be distributed, and every layer can also be distributed multiple Jie
Matter resonator.Wherein, first medium resonator 110 and second medium resonator 120 not refer in particular to certain two dielectric resonator, and
It is to refer in all multiple dielectric resonators for constituting dielectric waveguide filter 100, meets two media of the relationship that is layered on top of each other
Resonator.
Example is as shown in Figure 1, dielectric waveguide filter 100 includes four stacked dielectric resonators two-by-two, and every layer is distributed two
Two dielectric resonators of a dielectric resonator, same layer intercouple.So, first medium resonator 110 can be four
Any one in resonator, and the second resonator 120 is that the dielectric resonance set is stacked with first medium resonator 110
Device.
In order to realize the input and output of signal, constitutes and be additionally provided on the dielectric resonator of dielectric waveguide filter 100
Signal connector 130.
Referring to Figure 2 together to Fig. 7, first medium resonator 110 includes first medium body 111 and the first metallic walls 113,
First metallic walls 113 are coated on the outer surface of first medium body 111.Specifically, can be by way of plating in first medium body
111 outer surface plating sets layer of metal film, to form the first metallic walls 113.The exterior contour one of first medium resonator 110
As in cube shaped, therefore the first metallic walls 113 are also in cube structure.
Second medium resonator 120 and the structure of first medium resonator 110 are essentially identical.Wherein, second medium resonance
Device 120 includes second medium body 121 and the second metallic walls 123 for being coated on 121 outer surface of second medium body.Due to first medium
Resonator 110 is stacked with second medium resonator 120, therefore one of them of the first metallic walls 113 and the second metallic walls 123
Surface toward each other and contacts, and the side of the first metallic walls 113 and the second metallic walls 123 toward each other is respectively the first contact surface
(not shown) and the second contact surface (not shown).For being in the dielectric resonator of cube structure, the first contact surface and second are connect
Contacting surface is rectangle plane.
Wherein, the first signal transmission passage 115 is formed in first medium body 111, be formed in second medium body 121 with
The second signal transmission channel 125 of first signal transmission passage 115 electrical connection.First signal transmission passage 115 and second signal
The transmission of signal can be achieved in transmission channel 125.Therefore, signal can be passed by the first signal transmission passage 115 and second signal
It is conducted between first medium resonator 110 and second medium resonator 120 in defeated channel 125.
In one embodiment, the first signal transmission passage 115 and the second signal transmission channel 125 are metallization
Duct.
According to the first signal transmission passage 115 and the different form of second signal transmission channel 125, duct of metallizing can be with
It is through-hole or blind hole.Metallize duct generation type it is as follows: first in 121 internal drilling of first medium body 111 and second medium body,
Filling liquid metal and make its solidification into hole again, can make hole wall to be covered with one layer of metal layer and realize conduction, thus
The first signal transmission passage 115 that can transmit signal and second signal transmission are formed in one dielectric 111 and second medium body 121
Channel 125.
Due to the metal layer and the close composition metal hole wall of hole wall attachment in metallization duct, therefore it can avoid the first signal and pass
There are gaps between defeated channel 115 and second signal transmission channel 125 and first medium body 111 and second medium body 121, prevent
It generates capacity effect and influences the function of dielectric waveguide filter 100.
Further, in order to process and convenient formation, in one embodiment, the circular in cross-section in duct of metallizing.
It should be pointed out that in other embodiments, the first signal transmission passage 115 and second signal transmission channel 125
It is not limited to a kind of metallization form in duct, for example, the first signal transmission passage 115 and second signal transmission channel 125 may be used also
For the metal probe being embedded in first medium body 111 and second medium body 121, it need to only make metal probe and first medium body
111 and second medium body 121 be embedded closely.
In one embodiment, the first signal transmission passage 115 is coaxially disposed with second signal transmission channel 125.
Specifically, coaxial arrangement is even more in order to easy to process.By taking Fig. 1 as an example, formed the first signal transmission passage 115 and
When second signal transmission channel 125, it only need to once drill and the operation of filling liquid metal can form simultaneously.
It should be pointed out that the first signal transmission passage 115 can also mutually stagger centainly with second signal transmission channel 125
Distance need to only guarantee the metal aperture for constituting the metallization duct of the first signal transmission passage 115 and second signal transmission channel 125
Wall part contact.
In one embodiment, the first signal transmission passage 115 and second signal transmission channel 125 are respectively along perpendicular to the
The direction of one contact surface and the second contact surface extends.It is certain in first medium resonator 110 and 120 size of second medium resonator
In the case where, be conducive to the length for reducing the first signal transmission passage 115 and second signal transmission channel 125.
In addition, the first signal transmission passage 115 and second signal transmission channel 125 connect with the first contact surface and second respectively
Contacting surface insulation.It is therefore possible to prevent the first signal transmission passage 115 and second signal transmission channel 125 and the first contact surface and
Two contact surfaces are directly connected.Moreover, because signal can pass between first medium resonator 110 and second medium resonator 120
It leads, therefore cross-coupling can be formed between two resonators.
In one embodiment, the first contact surface offers the first window 101 for exposing first medium body 111, and second
Contact surface offers the second window 102 for exposing second medium body 121.First window 101 and the second window 102 are at least partly
Overlapping, and the first signal transmission passage 115 and second signal transmission channel 125 pass through 102 phase of first window 101 and the second window
The region of overlapping.
Specifically, first window 101 and the second window 102 are respectively by the metal office of the first contact surface and the second contact surface
The hatch frame that portion's hollow out obtains.First window 101 and the second window 102 can be all overlapped, and can also be partly overlapped, it is only necessary to protect
When demonstrate,proving the first signal transmission passage 115 and second signal transmission channel 125 and passing through overlapping region, not with the first metallic walls 113 and
The contact of second metallic walls 123.
Therefore, the first signal transmission passage 115 and second signal transmission channel 125 can pass through first window 101 and
Two windows 102 are realized with the first contact surface and the second contact surface respectively to insulate.Due to realizing the mode of insulation and being not introduced into new
Insulating device, therefore be conducive to simplify the structure of dielectric waveguide filter 100 and reduce difficulty of processing and cost.
Further, to further decrease difficulty of processing, and reduce the open-mouth ruler of first window 101 and the second window 102
It is very little.In one embodiment, first window 101 and the second window 102 are rounded and completely overlapped.
As shown in figure 8, since cross-coupling can be formed between two resonators.Therefore, in 100 frequency of dielectric waveguide filter
Rate responds the both ends of passband, an attenuation pole can be respectively generated, to further improve the frequency of dielectric waveguide filter 100
Rate selects characteristic.Moreover, compared with zero cavity configuration, without additional increase cavity body structure while improving selecting frequency characteristic, and only
The improvement in structure need to be carried out to first medium body 111 and second medium body 121.Therefore, dielectric waveguide filter 100
Element not will increase, volume will not become larger.
Moreover, forming window with using air gap, and then generate the mode phase of the attenuation pole outside frequency response passband
Than, the first signal transmission passage 115 and second signal transmission channel 125 without being accurately positioned, thus greatly reduce difficulty of processing,
Improve processing efficiency.
Further, when the form of the first signal transmission passage 115 and second signal transmission channel 125 adjusts, first
The coupling polarity and coupling amount generated between dielectric resonator 110 and second medium resonator 120 corresponding can adjust, so as to
Change the power of attenuation pole, realizes the accurate adjustment to selecting frequency characteristic.
As shown in Figures 2 and 3, in one embodiment, the first signal transmission passage 115 and second signal transmission channel
125 extend through first medium body 111 and second medium body 121.
Specifically, when the first signal transmission passage 115 and second signal transmission channel 125 are metallization duct, the first letter
Number transmission channel 115 and second signal transmission channel 125 are through-hole.At this point, first medium resonator 110 and second medium are humorous
It is capacitive coupling between vibration device 120.By adjusting the position of through-hole, the coupling amount between two dielectric resonators can be realized
It adjusts, and then changes the power of attenuation pole.
As shown in Figures 4 and 5, in the second embodiment, the first signal transmission passage 115 runs through first medium body 111,
Second signal transmission channel 125 does not run through second medium body 121.
Specifically, when the first signal transmission passage 115 and second signal transmission channel 125 are metallization duct, the first letter
Number transmission channel 115 is through-hole, and second signal transmission channel 125 is blind hole.At this point, first medium resonator 110 and second
It is inductive coupled between dielectric resonator 120.It, can be to two by adjusting through-hole, the position of blind hole and the depth of blind hole
Coupling amount between dielectric resonator realizes the power for adjusting, and then changing attenuation pole.
As shown in FIG. 6 and 7, in third embodiment, the first signal transmission passage 115 and second signal transmission channel
125 do not run through first medium body 111 and second medium body 121.
Specifically, when the first signal transmission passage 115 and second signal transmission channel 125 are metallization duct, the first letter
Number transmission channel 115 and second signal transmission channel 125 are blind hole.At this point, first medium resonator 110 and second medium are humorous
It is capacitive coupling between vibration device 120.It, can be to the coupling between two dielectric resonators by adjusting position and the depth of blind hole
Amount realizes the power for adjusting, and then changing attenuation pole.
Above-mentioned dielectric waveguide filter 100, due to distinguishing in first medium resonator 110 and second medium resonator 120
Be formed with the first signal transmission passage 115 and second signal transmission channel 125, thus signal can in first medium resonator 110 and
It is conducted between second medium resonator 120, cross-coupling can be formed between two resonators.Therefore, it is filtered in above-mentioned Medium Wave Guide
The both ends of 100 frequency response passband of wave device, can generate attenuation pole, to further improve dielectric waveguide filter 100
Frequency selective characteristic.Moreover, when improving selecting frequency characteristic, without additional increase cavity body structure, and only need to be to first medium
Body 111 and second medium body 121 carry out the improvement in structure, therefore volume not will increase.Therefore, above-mentioned Medium Wave Guide filtering
Device 100 is conducive to the miniaturization of product.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of dielectric waveguide filter, which is characterized in that including first medium resonator and with the first medium resonator
The second medium resonator being stacked, the first medium resonator include first medium body and are coated on the first medium
First metallic walls of external surface, the second medium resonator includes second medium body and to be coated on the second medium external
Second metallic walls on surface, the side of first metallic walls and second metallic walls toward each other is respectively the first contact surface
And second contact surface；
Wherein, the first signal transmission passage is respectively formed in the first medium body and the second medium body and with described
The second signal transmission channel of one signal transmission passage electrical connection, and first signal transmission passage and the second signal pass
It insulate respectively with first contact surface and second contact surface in defeated channel.
2. dielectric waveguide filter according to claim 1, which is characterized in that first signal transmission passage and described
Second signal transmission channel extends through the first medium body and the second medium body.
3. dielectric waveguide filter according to claim 1, which is characterized in that first signal transmission passage runs through institute
First medium body is stated, the second signal transmission channel does not run through the second medium body.
4. dielectric waveguide filter according to claim 1, which is characterized in that first signal transmission passage and described
Second signal transmission channel does not run through the first medium body and the second medium body.
5. dielectric waveguide filter according to claim 1, which is characterized in that first signal transmission passage with it is described
The coaxial arrangement of second signal transmission channel.
6. dielectric waveguide filter according to claim 1, which is characterized in that first contact surface, which offers, to be exposed
The first window of the first medium body, second contact surface offer the second window for exposing the second medium body,
The first window and second window are least partially overlapped, and first signal transmission passage and the second signal pass
Defeated channel passes through the first window and the equitant region of the second window.
7. dielectric waveguide filter according to claim 6, which is characterized in that the first window and second window
It is rounded and completely overlapped.
8. dielectric waveguide filter according to claim 1, which is characterized in that first signal transmission passage and described
Second signal transmission channel extends along perpendicular to the direction of first contact surface and second contact surface respectively.
9. dielectric waveguide filter according to any one of claims 1 to 8, which is characterized in that the first signal transmission
Channel and the second signal transmission channel are metallization duct.
10. dielectric waveguide filter according to claim 9, which is characterized in that the cross section in the metallization duct is in
It is round.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822039384.4U CN209183692U (en) | 2018-12-06 | 2018-12-06 | Dielectric waveguide filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822039384.4U CN209183692U (en) | 2018-12-06 | 2018-12-06 | Dielectric waveguide filter |
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| Publication Number | Publication Date |
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| CN209183692U true CN209183692U (en) | 2019-07-30 |
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ID=67375903
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| CN201822039384.4U Active CN209183692U (en) | 2018-12-06 | 2018-12-06 | Dielectric waveguide filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109546269A (en) * | 2018-12-06 | 2019-03-29 | 京信通信系统（中国）有限公司 | Dielectric waveguide filter |
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2018
- 2018-12-06 CN CN201822039384.4U patent/CN209183692U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109546269A (en) * | 2018-12-06 | 2019-03-29 | 京信通信系统（中国）有限公司 | Dielectric waveguide filter |
| CN109546269B (en) * | 2018-12-06 | 2024-02-27 | 京信通信技术(广州)有限公司 | Dielectric waveguide filter |
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200114 Address after: 510730 Guangdong city of Guangzhou province Guangzhou economic and Technological Development Zone Jinbi Road No. 6 Patentee after: Jingxin Communication Technology (Guangzhou) Co., Ltd. Address before: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Co-patentee before: Jingxin Communication Technology (Guangzhou) Co., Ltd. Patentee before: Jingxin Communication System (China) Co., Ltd. Co-patentee before: Jingxin Communication System (Guangzhou) Co., Ltd. Co-patentee before: TIANJIN COMBA TELECOM SYSTEMS CO., LTD. |
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| TR01 | Transfer of patent right |