CN109950672A - A kind of cavity metal medium bar hybrid resonant structure and filter - Google Patents
A kind of cavity metal medium bar hybrid resonant structure and filter Download PDFInfo
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- CN109950672A CN109950672A CN201711394699.4A CN201711394699A CN109950672A CN 109950672 A CN109950672 A CN 109950672A CN 201711394699 A CN201711394699 A CN 201711394699A CN 109950672 A CN109950672 A CN 109950672A
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- 239000002184 metal Substances 0.000 title claims abstract description 104
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 104
- 239000003989 dielectric material Substances 0.000 claims abstract description 4
- 239000007769 metal material Substances 0.000 claims abstract description 4
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 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
- 238000001816 cooling Methods 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- 238000004088 simulation Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—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
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
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Abstract
The invention discloses a kind of cavity metal medium bar hybrid resonant structure and filters, it includes metal single-chamber, and it is set to the medium resonant rod in the metal single-chamber, the medium resonant rod includes coaxially arranged intermetallic metal resonant element and end dielectric resonance unit, and the both ends of the intermetallic metal resonant element are at least respectively disposed with the end dielectric resonance unit.It is the configuration of the present invention is simple, easy to install and use, its structure by the way that medium resonant rod to be made to sectional type, and by the way that intermetallic metal resonant element is designed as metal material, end dielectric resonance unit is designed as dielectric material, and existing traditional cavity fluid filter add the mode of coaxial metal chamber to be equipped with the height dimension of filter of the invention compared with the existing technology in filter 1/3 or more size compression, while can also be effectively that filter frequencies are greatly reduced under the premise of keeping volume not increased.
Description
Technical field
The present invention relates to a kind of resonance structure and filters, belong to the passive antenna feeder device technology neck in wireless communication field
Domain, and in particular to a kind of cavity metal medium bar hybrid resonant structure and filter.
Background technique
With radio mobile communication fast development, the signal cover of low-frequency range is bigger, and the diffraction performance of signal
More preferably, increasing in the requirement of low-frequency small-sized to communication apparatus, especially low-frequency filter field, conventional filter are general
Using cavity plus coaxial metal resonant rod, but such filter is since frequency is lower, when 700MHz following frequencies, due to wavelength
Reason causes volume larger, and when using helical resonator, although can be with compression volume, general single-chamber Q value be again lower, causes
The insertion loss of filter is excessive；Product in the prior art, which cannot achieve, simultaneously is keeping the not increased premise of filter volume
Down while guaranteeing that low frequency filtering can use on private network or special low frequency filter product.
Summary of the invention
In view of the above-mentioned drawbacks of the prior art, the purpose of the present invention is to solve the deficiency of the above background technology,
A kind of cavity low-frequency filter is provided, to meet requirement of the cavity dielectric filter to more high q-factor and smaller volume.
In order to solve the above technical problems, present invention employs such a cavity blending agent resonance knots for filter
Structure comprising metal single-chamber, and the medium resonant rod being set in the metal single-chamber, the medium resonant rod include coaxial cloth
The intermetallic metal resonant element and end dielectric resonance unit set, the both ends of the intermetallic metal resonant element are at least respectively disposed with
One end dielectric resonance unit.
In a kind of preferred embodiment of the invention, it is set to the end medium at intermetallic metal resonant element both ends
The quantity of resonant element is corresponding.
In a kind of preferred embodiment of the invention, every one end of the intermetallic metal resonant element is at least provided with two
A end dielectric resonance unit.
In a kind of preferred embodiment of the invention, the intermetallic metal resonant element and the end dielectric resonance list
Member is in close contact.
In a kind of preferred embodiment of the invention, the intermetallic metal resonant element and the end dielectric resonance list
Member adopts a split structure molding, by being spliced between the intermetallic metal resonant element and the end dielectric resonance unit
One overall structure.
In a kind of preferred embodiment of the invention, the metal single-chamber or the medium resonant rod are arranged to cylinder
Body, square or cuboid, and it is set as hollow inside the medium resonant rod or center is arranged to through-hole or blind hole.
In a kind of preferred embodiment of the invention, the intermetallic metal resonant element is metal material, the end
Dielectric resonance unit is dielectric material.
In a kind of preferred embodiment of the invention, the length of the medium resonant rod and filter cavity bottom surface are extremely filtered
The distance of wave device cover board inner face is corresponding.
The invention also discloses a kind of filter for being equipped with cavity metal medium bar hybrid resonant structure, including cavity,
Cover board and coupling tuning screw rod, the cover plate lid are set to above the cavity, and the coupling tuning screw rod is arranged in the cavity, institute
It states and is equipped with multiple dielectric resonators in cavity, it is characterised in that: the dielectric resonator is cavity metal medium bar hybrid resonant
Structure, the lower end surface of the cavity metal medium bar hybrid resonant structure and the bottom of the cavity are in close contact, the cavity
The upper surface of metal medium bar hybrid resonant structure and the cover board are in close contact.
The beneficial effects of the present invention are: it is the configuration of the present invention is simple, easy to install and use, by the way that medium resonant rod is made
The structure of sectional type, and by the way that intermetallic metal resonant element is designed as metal material, end dielectric resonance unit is designed as being situated between
Material, and add the mode of coaxial metal chamber to make that filter of the invention is installed in existing traditional cavity fluid filter
Height dimension compared with the existing technology in filter 1/3 or more size compression, while can also effectively keep volume
It is that filter frequencies are greatly reduced under the premise of not increased, so that it can be used for private network or special low frequency filter product
On；The dielectric constant of end dielectric resonance unit of the invention is higher, and the height dimension of compression is also bigger；Dielectric rod size is got over
Thin, frequency is lower, and Q value does not decline to a great extent with the reduction of cavity size；The present invention is maintaining resonant rod total simultaneously
The end dielectric resonance element number that intermetallic metal resonant element both ends can be adjusted under the premise of height as needed, thus effectively
Adjust the size of Q value；The present invention is by by intermetallic metal resonant element and end dielectric resonance unit integral type machine-shaping side
Medium resonant rod positioning and assembly, by by intermetallic metal resonant element and end dielectric resonance unit using split type
Machine-shaping facilitates the control of medium resonant rod Q value；Intermetallic metal resonant element and end dielectric resonance unit of the invention
Shape can be cylindrical body, cuboid and square etc., be also possible to the combination of above-mentioned shape, the shape of metal single-chamber can also
Think that cylindrical body, cuboid and square, metal single-chamber and resonance rod-shape can be installed with combined crosswise, such as cylindrical body dielectric rod
In cuboid or square single-chamber；Or cuboid dielectric rod is mounted on cuboid or square single-chamber body etc., combination of media
It is air between resonant rod and cavity inner wall, and metallic rod top or bottom can be designed to flange disk shape, can apply
In low frequency；The requirement in order to meet variation of ambient temperature and reliability of the invention, can be by adjusting intermetallic metal resonance list
The material property of member carries out temperature-compensating, keeps its electrical property more stable under complete warm environment, in order to enhance the reliable of this structure
Property, end dielectric resonance unit can be used elastic material, make it will not be due to different materials when environment temperature quickly changes
The coefficient of expansion is different and causes to fail；A kind of filter being equipped with blending agent resonance structure disclosed in this invention, chamber
Internal wall is metal, can use material for aluminium, copper, steel etc., can also use the nonmetallic materials such as plastics and composite material can be with
Its cavity inner wall is set to have electric conductivity by modes such as electrosilvering, copper；It being emulated in cavity side, electric field strength is maximum,
Under long term high temperature high power environment, it may be considered that increase radiator in cavity side, it can be using radiation tooth and cavity die casting
One can also individually arrange cooling fin outside cavity, to reduce entire cavity inside and outside temperature.
Detailed description of the invention
Fig. 1 is a kind of explosive view of cavity metal medium bar hybrid resonant structure of the embodiment of the present invention；
Fig. 2 is a kind of main view of cavity metal medium bar hybrid resonant structure of the embodiment of the present invention；
Fig. 3 is a kind of cross-sectional view of cavity metal medium bar hybrid resonant structure of the embodiment of the present invention；
Fig. 4 is a kind of top view of cavity metal medium bar hybrid resonant structure of the embodiment of the present invention；
Fig. 5 is a kind of explosion view of filter for being equipped with cavity metal medium bar hybrid resonant structure of the embodiment of the present invention
Figure
Fig. 6 is a kind of main view for the filter for being equipped with cavity metal medium bar hybrid resonant structure of the embodiment of the present invention
Figure；
Fig. 7 is a kind of section view for the filter for being equipped with cavity metal medium bar hybrid resonant structure of the embodiment of the present invention
Figure；
In figure: 1- medium resonant rod, 2- intermetallic metal resonant element, the end 3- dielectric resonance unit, 4- cavity, 5- lid
Plate, 6- coupling tuning screw rod, 7- metal single-chamber.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
By a kind of description of the invention cavity metal medium bar hybrid resonant structure schematic diagram shown in the drawings it is found that this hair
Bright includes metal single-chamber, and the medium resonant rod 1 being set in metal single-chamber, the wherein upper surface of medium resonant rod 1 and gold
Belong to the cover board inner face close contact of single-chamber, the lower end surface of medium resonant rod 1 is in contact with the cavity bottom surface of metal single-chamber, medium
Resonant rod 1 includes a coaxially arranged intermetallic metal resonant element 2 and at least two end dielectric resonance units 3, and end is situated between
Matter resonant element 3 is arranged symmetrically relative to intermetallic metal resonant element 2, and the both ends of intermetallic metal resonant element 2 are at least respectively arranged
There is an end dielectric resonance unit 3, the length of intermetallic metal resonant element 2 is greater than end dielectric resonance unit 3.It needs to refer to
It out, can be according to the size of Q value under the premise of guaranteeing intermetallic metal resonant element 2 and maintaining medium resonant rod 1 total high
Between metal resonant element 2 both ends configure end dielectric resonance unit 3, be normally at the end at 2 both ends of intermetallic metal resonant element
Portion's dielectric resonance unit 3 is arranged symmetrically and symmetrically increases, but can also be by the end dielectric resonance unit 3 of wherein one end in addition
It is divided into multiple segments, above technical scheme all belongs to the scope of protection of the present invention, meanwhile, keeping intermetallic metal resonant element 2
Under the premise of, the end that different number and differing dielectric constant can be further added by the basis of end dielectric resonance unit 3 is situated between
Matter resonant element 3, symmetrical above and below increase of increased end dielectric resonance unit 3 (under the premise of maintaining resonant rod total high, keep
Intermetallic metal resonant element 2 always position resonant rod middle position, that remaining end dielectric resonance unit 3 is symmetrically positioned in intermetallic metal is humorous
The upper and lower position of vibration unit 2), and in metal medium hybrid resonant bar, 3 dielectric constants of increased end dielectric resonance unit are small
In the dielectric constant of former end dielectric resonance unit 3, and so on, the end contacted with metal single-chamber bottom and cover inner surface
3 dielectric constant of dielectric resonance unit is minimum.In a kind of preferred embodiment of the invention, it is arranged in intermetallic metal resonant element
The end dielectric resonance unit 3 at 2 both ends is arranged symmetrically relative to intermetallic metal resonant element 2 is arranged in.
The molding of medium resonant rod 1 includes two schemes: 1. integral type schemes: intermetallic metal resonant element 2 and end are situated between
Matter resonant element 3 is formed using integral structure, that is, uses mold integrally casting shaping, the change of each unit dielectric constant
It is that the material that differing dielectric constant is added by the specified position in mold is formed.
2. split type scheme: intermetallic metal resonant element 2 and end dielectric resonance unit 3 adopt a split structure molding,
An overall structure is connected by splicing between intermetallic metal resonant element 2 and end dielectric resonance unit 3.
Either integral type scheme or split type scheme, intermetallic metal resonant element 2 and end dielectric resonance unit 3
All can be one of shapes such as cylindrical body, cuboid and square, while each shape can be solid shape and be also possible to
Hollow shape, cavity and resonance rod-shape can be mounted in cuboid or square single-chamber with combined crosswise, such as cylindrical body dielectric rod；
Or cuboid dielectric rod is mounted on cuboid or square single-chamber body etc., is empty between combination of media resonant rod and cavity inner wall
Gas, and dielectric rod and single-chamber can form bimodulus and multimode under specific dimensions and shape；Intermetallic metal resonant element 2 and end
The material dielectric constant of portion's dielectric resonance unit 3 differs；Intermetallic metal resonant element 2 is solid cylindrical or hollow sleeve tubular.
End dielectric resonance unit 3 is solid cylindrical or hollow sleeve tubular.End dielectric resonance unit 3 is made of dielectric material, excellent
Select elastic material.The length of medium resonant rod 1 is corresponding at a distance from filter cavity bottom surface to filter cover board inner face.
The invention also discloses a kind of filters for being equipped with blending agent resonance structure, including cavity 4, cover board 5 and coupling
Tuning screw 6 is closed, cover board 5 is covered on 4 top of cavity, and coupling tuning screw rod 6 is arranged in cavity 4, and multiple Jie are equipped in cavity 4
Matter resonator, dielectric resonator are a kind of cavity metal medium bar hybrid resonant structure, cavity metal medium bar hybrid resonant knot
The lower end surface of structure and the bottom of cavity 4 are in close contact, and the upper surface of cavity metal medium bar hybrid resonant structure and cover board 5 are close
Contact.4 inner wall of cavity is metal, and material can be used for aluminium, copper, steel etc., can also be nonmetallic with plastics and composite material etc.
Material can make its cavity inner wall have electric conductivity by modes such as electrosilvering, copper.4 broadside electric field maximum intensity of cavity,
Under long term high temperature high power environment, it may be considered that increase radiator in cavity side, it can be using radiation tooth and cavity die casting
One can also individually arrange cooling fin outside cavity, to reduce entire cavity inside and outside temperature.
The covering plate structure of the invention patent can overcome drawbacks described above, pass through the composite structure of metallic rod and dielectric rod, energy
The volume of enough reduction filters while promoting single-chamber Q value effectively, mentions compared to the mono- dielectric constant resonator q of traditional TM
10% or more is risen, and relative to traditional TM single mode, this mode can form bimodulus and more under specific shape and dimension combination
Mould, relative to TM two sides earth list dielectric constant resonator, it is even more that volume substantially reduces 1/3；Meanwhile it can keep
It is that filter frequencies can be greatly reduced under the premise of volume is not increased, on private network or special low frequency filter product.
Case is embodied: when having a size of 20*20*30, conventional coaxial metal single-chamber, in low frequency applications, usually
Metal resonant rod flange plate realizes frequency reducing rate, if frequency need to further be reduced, and on the basis of face-flange disk
Under turn over and to carry out further frequency reducing, at present under this volume, the frequency emulated in the usual way is minimum to accomplish
763MHz.Now use cavity metal medium resonant rod mixed structure form, intermetallic metal resonant element 2 and end dielectric resonance list
The dielectric constant of member 3 is 1, diameter 10mm, and with a thickness of 0.5mm, metal resonant rod height is 29mm, and diameter 10mm passes through
Simulation frequency is 300M, and Q value is 1100, and relative to conventional metals single-chamber, frequency has dropped close on original frequency base
400MHz, if straight-bar diameter is changed to 4mm on the basis of metal resonance, in addition diameter is the ring flange of 19mm, through emulation frequency
Rate can accomplish 125MHz, and Q value is 774.So keeping volume not by new cavity metal medium resonant rod mixed structure
It is that filter frequencies can be greatly reduced under the premise of increased, on private network or special low frequency filter product, this scheme
Its application can be fully met.
More than it should be understood that, only a specific embodiment of the invention, but protection scope of the present invention is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the invention, the variation that can readily occur in or is replaced
It changes, should be covered by the protection scope of the present invention.
Claims (9)
1. a kind of cavity metal medium bar hybrid resonant structure, including metal single-chamber, and Jie being set in the metal single-chamber
Matter resonant rod (1), it is characterised in that: the medium resonant rod (1) includes coaxially arranged intermetallic metal resonant element (2) and end
Portion's dielectric resonance unit (3), it is humorous that the both ends of the intermetallic metal resonant element (2) are at least respectively disposed with the end medium
It shakes unit (3).
2. cavity metal medium bar hybrid resonant structure according to claim 1, it is characterised in that: be set to intermetallic metal
The quantity of the end dielectric resonance unit (3) at resonant element (2) both ends is corresponding.
3. cavity metal medium bar hybrid resonant structure according to claim 2, it is characterised in that: the intermetallic metal is humorous
Every one end of vibration unit (2) is at least provided with two end dielectric resonance units (3).
4. cavity metal medium bar hybrid resonant structure according to claim 1, it is characterised in that: the intermetallic metal is humorous
It shakes unit (2) and the end dielectric resonance unit (3) is in close contact.
5. cavity metal medium bar hybrid resonant structure according to claim 1, it is characterised in that: the intermetallic metal is humorous
Vibration unit (2) and the end dielectric resonance unit (3) adopt a split structure molding, the intermetallic metal resonant element (2)
By being spliced into an overall structure between the end dielectric resonance unit (3).
6. cavity metal medium bar hybrid resonant structure according to claim 1, it is characterised in that: the metal single-chamber or
The medium resonant rod (1) is arranged to cylindrical body, square or cuboid, and is set as inside the medium resonant rod (1)
Sky or center are arranged to through-hole or blind hole.
7. cavity metal medium bar hybrid resonant structure according to claim 1, it is characterised in that: the intermetallic metal is humorous
Unit (2) are shaken for metal material, and the end dielectric resonance unit (3) is dielectric material.
8. cavity metal medium bar hybrid resonant structure according to claim 1, it is characterised in that: the medium resonant rod
(1) length is corresponding at a distance from filter cavity bottom surface to filter cover board inner face.
9. a kind of filter for being equipped with cavity metal medium bar hybrid resonant structure, including cavity (4), cover board (5) and coupling
Tuning screw (6), the cover board (5) are covered on above the cavity (4), and the coupling tuning screw rod (6) is arranged in cavity (4)
It is interior, multiple dielectric resonators are equipped in the cavity (4), it is characterised in that: the dielectric resonator is that claim 1-8 is any
Cavity metal medium bar hybrid resonant structure described in one claim, the cavity metal medium bar hybrid resonant structure
The bottom of lower end surface and the cavity (4) is in close contact, the upper surface of the cavity metal medium bar hybrid resonant structure and institute
State cover board (5) close contact.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711394699.4A CN109950672A (en) | 2017-12-21 | 2017-12-21 | A kind of cavity metal medium bar hybrid resonant structure and filter |
| PCT/CN2018/079555 WO2019119658A1 (en) | 2017-12-21 | 2018-03-20 | Hybrid resonance structure including cavity and metal/dielectric rod, and filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711394699.4A CN109950672A (en) | 2017-12-21 | 2017-12-21 | A kind of cavity metal medium bar hybrid resonant structure and filter |
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| CN109950672A true CN109950672A (en) | 2019-06-28 |
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| CN201711394699.4A Pending CN109950672A (en) | 2017-12-21 | 2017-12-21 | A kind of cavity metal medium bar hybrid resonant structure and filter |
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| WO (1) | WO2019119658A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050073378A1 (en) * | 2003-10-06 | 2005-04-07 | Com Dev Ltd. | Microwave resonator and filter assembly |
| CN103022621A (en) * | 2012-12-18 | 2013-04-03 | 四川九洲电器集团有限责任公司 | Resonator utilizing medium block loading |
| 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 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8884723B2 (en) * | 2010-06-02 | 2014-11-11 | Com Dev International Ltd. | TE011 cavity filter assembly |
| CN201946731U (en) * | 2010-12-17 | 2011-08-24 | 摩比天线技术（深圳）有限公司 | Resonator and filter with same |
| CN103151581B (en) * | 2012-11-30 | 2016-03-30 | 摩比天线技术（深圳）有限公司 | TM mould dielectric filter |
| CN105470617B (en) * | 2014-09-10 | 2019-07-02 | 罗森伯格技术（昆山）有限公司 | Dual-mode resonator |
| 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 |
-
2017
- 2017-12-21 CN CN201711394699.4A patent/CN109950672A/en active Pending
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2018
- 2018-03-20 WO PCT/CN2018/079555 patent/WO2019119658A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050073378A1 (en) * | 2003-10-06 | 2005-04-07 | Com Dev Ltd. | Microwave resonator and filter assembly |
| CN103022621A (en) * | 2012-12-18 | 2013-04-03 | 四川九洲电器集团有限责任公司 | Resonator utilizing medium block loading |
| 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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| WO2019119658A1 (en) | 2019-06-27 |
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