CN103165969A - Harmonic oscillator, resonant cavity, wave filter component and electromagnetic wave equipment - Google Patents
Harmonic oscillator, resonant cavity, wave filter component and electromagnetic wave equipment Download PDFInfo
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- CN103165969A CN103165969A CN2012105860433A CN201210586043A CN103165969A CN 103165969 A CN103165969 A CN 103165969A CN 2012105860433 A CN2012105860433 A CN 2012105860433A CN 201210586043 A CN201210586043 A CN 201210586043A CN 103165969 A CN103165969 A CN 103165969A
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Abstract
The invention relates to a harmonic oscillator. The harmonic oscillator comprises a medium body, wherein concave holes are formed in the surface of the medium body, and a first conducting layer made of conducting materials is arranged on the outer side wall of the medium body. The invention further relates to a resonant cavity with the harmonic oscillator, a wave filter component, and electromagnetic wave equipment. Due to the fact that the harmonic oscillator with the conducting layer on the outer side wall is adopted, reduction of the resonant frequency of the resonant cavity with the harmonic oscillator is benefited, and accordingly the size of the resonant cavity is greatly reduced, and the size of the wave filter component with the resonant cavity and the size of the electromagnetic wave equipment are obviously reduced with the reduction of the size of the resonant cavity.
Description
Technical field
The present invention relates to ﹠ RF Components and equipment thereof, more particularly, relate to a kind of harmonic oscillator, resonant cavity, filtering device and electromagnetic wave device.
Background technology
Traditional metal harmonic oscillator filter volume is little and can realize the resonance of lower frequency, but the little meeting of volume causes bearing higher power.Traditional dielectric resonance subfilter can be born high power, but if realize low-frequency resonant, the volume of the volume of dielectric resonance and wire chamber can be larger, do not satisfy the demand of filter miniaturization.How designing that a kind of resonance frequency is low, volume is little and anti-high-power harmonic oscillator and filter thereof, is to need a problem solving.
Summary of the invention
The object of the invention is to, for the defects of prior art, provide that a kind of resonance frequency is low, volume is little and anti-high-power harmonic oscillator, resonant cavity, filtering device and electromagnetic wave device.
The technical solution adopted for the present invention to solve the technical problems is: a kind of harmonic oscillator, comprise the medium body, and offer shrinkage pool on described medium body surface, described medium body lateral wall is provided with the first conductive layer that electric conducting material consists of.
In harmonic oscillator of the present invention, described the first conductive layer is attached directly to described medium body lateral wall.
In harmonic oscillator of the present invention, described the first conductive layer is fixed on described medium body lateral wall by connecting medium.
In harmonic oscillator of the present invention, on the whole or local surfaces of the lateral wall of described the first described medium body of conductive layer covering.
In harmonic oscillator of the present invention, described the first conductive layer is metal cylinder, and described medium body is tubular and is built in described metal cylinder.
In harmonic oscillator of the present invention, be provided with the second conductive layer that electric conducting material consists of on described shrinkage pool inwall.
In harmonic oscillator of the present invention, described the second conductive layer is attached directly on described shrinkage pool inwall.
In harmonic oscillator of the present invention, described the second conductive layer is fixed on the side or bottom surface of described shrinkage pool inwall by connecting medium.
In harmonic oscillator of the present invention, described the second conductive layer is metal cylinder, and described medium body is tubular and is set in outside described metal cylinder.
In harmonic oscillator of the present invention, described the second conductive layer covers on the side or bottom surface of described shrinkage pool inwall, and perhaps described the second conductive layer covers on the whole inner wall surface of described shrinkage pool inwall.
In harmonic oscillator of the present invention, described medium body is made greater than 1 material by dielectric constant.
In harmonic oscillator of the present invention, described medium body is made by ceramic material.
In harmonic oscillator of the present invention, described shrinkage pool is blind hole or through hole.
In harmonic oscillator of the present invention, described electric conducting material is metal.
In harmonic oscillator of the present invention, described electric conducting material is silver, copper or gold, perhaps for containing in silver, copper or gold the alloy of one or both or three kinds.
In harmonic oscillator of the present invention, described electric conducting material is nonmetal for conduction.
In harmonic oscillator of the present invention, described electric conducting material is electrically conductive graphite, indium tin oxide or Al-Doped ZnO.
A kind of resonant cavity, comprise cavity, be positioned at the harmonic oscillator of described cavity, described harmonic oscillator is harmonic oscillator described above, and it comprises the medium body, offer shrinkage pool on described medium body surface, described medium body lateral wall is provided with the first conductive layer that electric conducting material consists of.
In resonant cavity of the present invention, be provided with the second conductive layer that electric conducting material consists of on described shrinkage pool inwall.
In resonant cavity of the present invention, described resonant cavity also comprises and is contained on described cavity and stretches into and play tuning tuning plug used in described cavity body, and described tuning plug and described shrinkage pool arrange in opposite directions.
In resonant cavity of the present invention, described medium body is provided with at least two shrinkage pools, and the position relative with each shrinkage pool is equipped with a tuning plug.
In resonant cavity of the present invention, the described tuning plug screw rod that to be dielectric constant make greater than 1 nonmetallic materials or be metal screw.
In resonant cavity of the present invention, described shrinkage pool is through hole, and is attached with the conductor articulamentum on medium body surface that described through hole is connected.
In resonant cavity of the present invention, the inwall of described conductor articulamentum and described resonant cavity is connected to one by welding or hot pressing or threaded engagement or bonding mode.
A kind of filtering device comprises one or more resonant cavitys, and at least one resonant cavity is resonant cavity described above.
In filtering device of the present invention, described filtering device is filter or duplexer.
In filtering device of the present invention, the second conductive layer of described harmonic oscillator contacts with ground connection with described resonant cavity.
In filtering device of the present invention, described filtering device comprises a plurality of resonant cavitys, is provided with a described harmonic oscillator in each resonant cavity, and the shrinkage pool correspondence of each harmonic oscillator is provided with a tuning plug.
In filtering device of the present invention, be the coupling of windowing between the resonant cavity of described filtering device and resonant cavity, and each position of windowing is provided with coupling bar.
In filtering device of the present invention, described filtering device is band pass filter, band stop filter, high pass filter, low pass filter or multiband filter.
A kind of electromagnetic wave device, comprise signal emission module, signal receiving module and filtering device, the input of described filtering device is connected with described signal emission module, and output is connected with signal receiving module, and described filtering device is filtering device described above.
In electromagnetic wave device of the present invention, described electromagnetic wave device is aircraft, radar, base station or satellite.
Implement the present invention, have following beneficial effect: harmonic oscillator lateral wall and shrinkage pool inwall that the present invention adopts all are attached with conductive layer, be conducive to reduce the resonance frequency of the resonant cavity with this harmonic oscillator, thereby greatly dwindle the volume of resonant cavity, have the filtering device of this resonant cavity and the volume of electromagnetic wave device and also can obviously reduce thereupon.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in accompanying drawing:
Fig. 1 is the vertical view of the harmonic oscillator of the preferred embodiment of the present invention;
Fig. 2 is the front view of harmonic oscillator shown in Figure 1;
Fig. 3 is the front view of another embodiment of harmonic oscillator of the present invention;
Fig. 4 is the vertical view of the resonant cavity in an embodiment;
Fig. 5 is the front view of resonant cavity shown in Figure 4;
Fig. 6 is the B-B profile of the filtering device in an embodiment;
Fig. 7 is the A-A profile of filtering device shown in Figure 6;
Fig. 8 is the partial structurtes schematic diagram of electromagnetic wave device of the present invention when being the base station.
Embodiment
The resonant cavity, filtering device and the electromagnetic wave device that the present invention relates to a kind of harmonic oscillator and have this harmonic oscillator, this harmonic oscillator makes resonant cavity have low-down resonance frequency, thereby much smaller with traditional resonant cavity phase specific volume of identical resonance frequency, the volume and weight that can effectively reduce the filtering device that is consisted of by resonant cavity and have the electromagnetic wave device of this filtering device.
Wherein the harmonic oscillator of an embodiment as shown in Figure 1 and Figure 2, comprise medium body 1, offer the shrinkage pool 2 of guided media body 1 inner recess on medium body 1 outer surface, medium body lateral wall is provided with the first conductive layer 4 that electric conducting material consists of, and all surfaces of shrinkage pool 2 inwalls or part surface also are provided with the second conductive layer 3 that electric conducting material consists of.
Medium body 1 can be for any dielectric constant greater than 1 material, such as polytetrafluoroethylene, epoxy resin, F4B, FR4 material etc., but the material that dielectric constant is higher, loss angle tangent is less more is conducive to electromagnetic resonance and reduces resonance frequency, preferably ceramic material in prior art, for example aluminium oxide, can be also for example BaTi of microwave-medium ceramics
4O
9, Ba
2Ti
9O
20, MgTiO
3-CaTiO
3, BaO-Ln
2O
3-TiO
2System, Bi
2O
3-ZnO-Nb
2O
5System etc.Certainly so long as have the material of higher dielectric constant and lower loss (dielectric constant is greater than 30 usually, and loss angle tangent is less than 0.01) and all can.
As shown in Figure 1, the medium body 1 of the present embodiment is the rectangle square column, and four rib roundings.Certainly harmonic oscillator is not limited to this shape, medium body 1 of the present invention can be the shape that existing any one harmonic oscillator has, for example cylindrical, square shape sheet, truncated cone-shaped, square halfpace, or other any regular or irregularly shaped, this does not have influence on the characteristic of harmonic oscillator of the present invention, and this paper is not restricted.
Shrinkage pool 2 shown in Figure 2 is through hole, and namely this shrinkage pool 2 is penetrated into another surface from a surface of medium body 1.The through hole of the present embodiment is cylindrical hole, and preferably the center line of this cylindrical hole is positioned on the central shaft of medium body 1, can be so that the electromagnetic field in cavity is symmetrical when harmonic oscillator is placed on resonant cavity central authorities.Through hole also can be cylindrical, square column type, truncated cone-shaped, square halfpace, taper or other rule or irregular shape, thereby or with the conformal thick structure such as 1 one-tenth of medium body that makes of the outline of medium body 1.
Certainly, this shrinkage pool 2 differs and is decided to be through hole, can be also blind hole, does not namely penetrate into another surperficial hole.For example, this blind hole can also can be other shapes such as hemisphere, tetrahedroid etc. for, just highly shorter shape identical with any shape of above-mentioned through hole, and this paper is not restricted.
The material of the conduction of the first conductive layer 4, the second conductive layer 3 is preferably metal, and for example silver, copper or gold for containing in silver, copper or gold the alloy of one or both or three kinds, can be perhaps also other metal materials or other metal alloys.Electric conducting material can be also can conduct electricity nonmetal, for example electrically conductive graphite, indium tin oxide or Al-Doped ZnO.
The first conductive layer 4, the second conductive layer 3 can be attached directly to as mentioned above on medium body lateral wall, on the shrinkage pool inwall, also can be separately positioned on medium body lateral wall by connecting medium, shrinkage pool 2 inside, such as adopting other modes such as the bonding or connecting rod of viscose glue.
Certain the first conductive layer 4 and the second conductive layer 3 can adopt identical electric conducting material, also can adopt different electric conducting materials.
The first conductive layer 4, the second conductive layer 3 can be local or integrally outer side wall surface, the interior side-wall surface of overwrite media body 1.
Simultaneously, the first conductive layer 4 can be the conductive foil of a slice integral body, can be also a plurality of conductive foil structures with certain geometrical shape, such as being the strip, criss-cross, disc, ellipse at a plurality of intervals successively etc., perhaps other complicated shapes, for example snowflake type shown in Figure 3, can be also " work " font, " ten " font.These paillon foil structures can rule arrange, but also random arrangement.The second conductive layer 3 is also like this.Paillon foil structure both can arrange regularly, such as parallel, symmetrical etc., also can arrange at random.
In embodiment shown in Figure 2, medium body 1 is the cylindrical shape of even uniform thickness, and middle shrinkage pool is through hole.The second conductive layer 3 is for having certain thickness metal cylinder, and the bottom is provided with flange, and medium body 1 is enclosed within the second conductive layer 3 outer and bottom surface and can just be placed on flange.Certainly, metal cylinder might not have flange, can only have columnar structured, fixing by bonding or other modes and resonant cavity bottom.
The scope that the second conductive layer 3 covers can be whole shrinkage pool 2 inner wall surface, can be the part surface of shrinkage pool 2 inwalls, for example only covers the side of shrinkage pool 2 inwalls, the inner wall section that also namely is connected with shrinkage pool 2 open ends; Also can only cover the bottom surface of shrinkage pool 2, i.e. the inner wall section that with this openend be not connected relative with shrinkage pool 2 open ends; Or, be coated with simultaneously the subregion of side and the subregion of bottom surface.
The scope that the first conductive layer 4 covers can be the whole surface of harmonic oscillator lateral wall, can be also the part surface of harmonic oscillator lateral wall.
The advantage that concrete applied environment below in conjunction with harmonic oscillator---resonant cavity illustrates this harmonic oscillator with and with the difference of existing media ceramic harmonic oscillator.
Resonant cavity such as Fig. 4, shown in Figure 5 comprise cavity 6, harmonic oscillator and tuning plug 5.Wherein, cavity 6 comprises cavity and is contained in the chamber lid of cavity hatch end, cavity and chamber lid encloses an enclosure space, and above-mentioned harmonic oscillator namely is positioned at described enclosure space, and its bottom can support harmonic oscillator by the supporting base that a low-loss material (as aluminium oxide etc.) made.Cavity or chamber cover is equipped with tuning plug 5, and tuning plug 5 ends stretch in enclosure space and stretch at least in part in the shrinkage pool 2 of harmonic oscillator.
In addition, when shrinkage pool 2 is through hole, the bottom surface that contacts with cavity 6 of medium body 1 can arrange the conductor articulamentum, and described conductor articulamentum is for making from above-mentioned the first conductive layer 4 or the identical or different conductor material of the second conductive layer 3, and couples together with the second conductive layer 3 on through-hole wall.This moment, this conductor articulamentum can be fixed with one by hot pressing or welding or other known interconnection techniques and cavity 6.
Can be provided with two or more than the shrinkage pool 2 of two on medium body 1, on one of them shrinkage pool 2 to a tuning plug 5 should be arranged.
The below will illustrate by concrete experimental data the advantage of resonant cavity of the present invention.Take a single chamber resonant cavity with pure ceramic dielectric harmonic oscillator as Comparative Examples, this resonant cavity is cylindrical, this ceramic dielectric harmonic oscillator adopts microwave-medium ceramics, be of a size of the cylinder of external diameter 24mm, internal diameter 8mm, high 16mm, the corresponding through hole of internal diameter, the resonance frequency that experiment records the resonant cavity with this harmonic oscillator is 1.673GHz.Adopt identical cavity and harmonic oscillator (above-mentioned pure ceramic dielectric harmonic oscillator is as the medium body of harmonic oscillator in this example), and plate silver (being the first conductive layer in this example) at the outer wall of this harmonic oscillator, while through hole also (being the shrinkage pool in this example) plates silver (being the second conductive layer in this example), and experiment records the resonance frequency of the resonant cavity with this harmonic oscillator and is down to 0.670GHz.This shows, adopt harmonic oscillator of the present invention, resonance frequency can be reduced approximately 1GHz, less than half of original resonance frequency, corresponding meaning, when the resonant cavity of preparation identical resonance frequency, cavity volume will significantly reduce.
Characteristics based on the resonant cavity in above-mentioned single chamber, the invention still further relates to a kind of filtering device, can have the device of filter function for band pass filter, band stop filter, high pass filter, low pass filter or multiband filter, duplexer or other, it comprises at least one resonant cavity, and wherein at least one resonant cavity is above-mentioned resonant cavity.
Take Fig. 6, multicavity filter shown in Figure 7 as example, filter shown in Figure 6 is the filter with six resonant cavitys.Input 8 and output 9 are equipped with respectively in cavity 6 two ends.
In order to strengthen coupling, between chamber and chamber, intercommunication fully, do not arrange barrier; Simultaneously, a plurality of harmonic oscillators link into an integrated entity by bridging part 7 as shown in Figure 6 successively.Described bridging part 7 can be that the material identical with medium body 1 made, and can be also that different materials is made, and directly the mode of bridge joint can strengthen coupling.Further, each position of windowing also is provided with coupling bar 10, also can regulate the coupling power by the length that coupling bar 10 stretches in the chamber.Certainly, the electric coupling between the cavity of conventional filter or magnetic coupling mode all can be applicable in the present invention, such as disk coupling, Metallic rod coupling etc.
As shown in Figure 6, each harmonic oscillator is as indicated above, the outer wall of harmonic oscillator is attached with the first conductive layer 4, and harmonic oscillator also has shrinkage pool 2 and the second conductive layer 3 that is attached on shrinkage pool 2 inwalls simultaneously, and each shrinkage pool 2 correspondence is provided with in a tuning plug 5 insertion shrinkage pools 2.
And then the present invention also protects a kind of electromagnetic wave device with above-mentioned filtering device, and this electromagnetic wave device can be the equipment that any needs are used filtering device, such as aircraft, radar, base station, satellite etc.These electromagnetic wave devices can receive and transmitted signal, and carry out filtering after receiving or before sending, so that institute's signal of receiving or sending satisfies the demands, so electromagnetic wave device at least also comprises the signal emission module that is connected with the input of filtering device, the signal receiving module that is connected with the output of filtering device.
For example, as shown in Figure 8, electromagnetic wave device is the base station, and the base station comprises the duplexer as filtering device, and duplexer comprises post a letter band pass filter and collection of letters band pass filter.The input of band pass filter of posting a letter connects sender, and output connects antenna for base station; The input of collection of letters band pass filter connects antenna for base station, and output connects receiver.
For the band pass filter of posting a letter, its signal emission module is sender, and signal receiving module is antenna for base station.And for collection of letters band pass filter, its signal emission module is antenna for base station, and signal receiving module is receiver.
The present invention is owing to adopting outer wall to have the harmonic oscillator of conductive layer, be conducive to reduce the resonance frequency of the resonant cavity with this harmonic oscillator and tolerate high power, thereby greatly dwindle the volume of resonant cavity, have the filtering device of this resonant cavity and the volume of electromagnetic wave device and also can obviously reduce thereupon.
The above is described embodiments of the invention by reference to the accompanying drawings; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away from the scope situation that aim of the present invention and claim protect, also can make a lot of forms, within these all belong to protection of the present invention.
Claims (34)
1. a harmonic oscillator, is characterized in that, described harmonic oscillator comprises:
The medium body;
Offer shrinkage pool on described medium body surface;
Described medium body lateral wall is provided with the first conductive layer that electric conducting material consists of.
2. harmonic oscillator according to claim 1, is characterized in that, described the first conductive layer is attached directly to described medium body lateral wall.
3. harmonic oscillator according to claim 1, is characterized in that, described the first conductive layer is fixed on described medium body lateral wall by connecting medium.
4. harmonic oscillator according to claim 1, is characterized in that, on the whole or local surfaces of the lateral wall of described the first described medium body of conductive layer covering.
5. harmonic oscillator according to claim 1, is characterized in that, described the first conductive layer is metal cylinder, and described medium body is tubular and is built in described metal cylinder.
6. harmonic oscillator according to claim 1, is characterized in that, is provided with the second conductive layer that electric conducting material consists of on described shrinkage pool inwall.
7. harmonic oscillator according to claim 6, is characterized in that, described the second conductive layer is attached directly on described shrinkage pool inwall.
8. harmonic oscillator according to claim 6, is characterized in that, described the second conductive layer is fixed on the side or bottom surface of described shrinkage pool inwall by connecting medium.
9. harmonic oscillator according to claim 6, is characterized in that, described the second conductive layer is metal cylinder, and described medium body is tubular and is set in outside described metal cylinder.
10. harmonic oscillator according to claim 6, is characterized in that, described the second conductive layer covers on the side or bottom surface of described shrinkage pool inwall, and perhaps described the second conductive layer covers on the whole inner wall surface of described shrinkage pool inwall.
11. harmonic oscillator according to claim 1 is characterized in that, described medium body is made greater than 1 material by dielectric constant.
12. harmonic oscillator according to claim 1 is characterized in that, described medium body is made by ceramic material.
13. harmonic oscillator according to claim 1 is characterized in that, described shrinkage pool is blind hole or through hole.
14. according to claim 1 or 6 described harmonic oscillators is characterized in that, described electric conducting material is metal.
15. harmonic oscillator according to claim 14 is characterized in that, described electric conducting material is silver, copper or gold, perhaps for containing in silver, copper or gold the alloy of one or both or three kinds.
16. harmonic oscillator, is characterized in that according to claim 1 or 5, described electric conducting material is nonmetal for conduction.
17. harmonic oscillator according to claim 16 is characterized in that, described electric conducting material is electrically conductive graphite, indium tin oxide or Al-Doped ZnO.
18. harmonic oscillator according to claim 17 is characterized in that, described the first conductive layer is a conductive foil or comprises a plurality of geometric conductive foil structures that have.
19. resonant cavity, comprise cavity, be positioned at the harmonic oscillator of described cavity, it is characterized in that, described harmonic oscillator is harmonic oscillator as described in claim 1 to 18 any one, it comprises the medium body, offer shrinkage pool on described medium body surface, described medium body lateral wall is provided with the first conductive layer that electric conducting material consists of.
20. resonant cavity according to claim 19 is characterized in that, is provided with the second conductive layer that electric conducting material consists of on described shrinkage pool inwall.
21. resonant cavity according to claim 19 is characterized in that, described resonant cavity also comprises and is contained on described cavity and stretches into and play tuning tuning plug used in described cavity body, and described tuning plug and described shrinkage pool arrange in opposite directions.
22. resonant cavity according to claim 21 is characterized in that, described medium body is provided with at least two shrinkage pools, and the position relative with each shrinkage pool is equipped with a tuning plug.
23. resonant cavity according to claim 21 is characterized in that, the described tuning plug screw rod that to be dielectric constant make greater than 1 nonmetallic materials or be metal screw.
24. resonant cavity according to claim 23 is characterized in that, described shrinkage pool is through hole, and is attached with the conductor articulamentum on medium body surface that described through hole is connected.
25. resonant cavity according to claim 24 is characterized in that, the inwall of described conductor articulamentum and described resonant cavity is connected to one by welding or hot pressing or threaded engagement or bonding mode.
26. resonant cavity according to claim 19 is characterized in that, described the first conductive layer is a conductive foil or comprises a plurality of geometric conductive foil structures that have.
27. a filtering device comprises one or more resonant cavitys, it is characterized in that, at least one resonant cavity is resonant cavity as described in claim 19 to 26 any one.
28. filtering device according to claim 27 is characterized in that, described filtering device is filter or duplexer.
29. filtering device according to claim 27 is characterized in that, the second conductive layer of described harmonic oscillator contacts with ground connection with described resonant cavity.
30. filtering device according to claim 27 is characterized in that, described filtering device comprises a plurality of resonant cavitys, is provided with a described harmonic oscillator in each resonant cavity, and the shrinkage pool correspondence of each harmonic oscillator is provided with a tuning plug.
31. filtering device according to claim 30 is characterized in that, be the coupling of windowing between the resonant cavity of described filtering device and resonant cavity, and each position of windowing is provided with coupling bar.
32. filtering device according to claim 27 is characterized in that, described filtering device is band pass filter, band stop filter, high pass filter, low pass filter or multiband filter.
33. electromagnetic wave device, comprise signal emission module, signal receiving module and filtering device, the input of described filtering device is connected with described signal emission module, output is connected with signal receiving module, it is characterized in that, described filtering device is filtering device as described in claim 27 to 32 any one.
34. electromagnetic wave device according to claim 33 is characterized in that, described electromagnetic wave device is aircraft, radar, base station or satellite.
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| CN201210586043.3A CN103165969B (en) | 2012-11-20 | 2012-11-30 | Harmonic oscillator, resonant cavity, wave filter component and electromagnetic wave equipment |
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| CN201210586043.3A CN103165969B (en) | 2012-11-20 | 2012-11-30 | Harmonic oscillator, resonant cavity, wave filter component and electromagnetic wave equipment |
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| CN103165969B CN103165969B (en) | 2014-04-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109818116A (en) * | 2019-03-27 | 2019-05-28 | 深圳市国人射频通信有限公司 | A kind of adjustment method of dielectric waveguide filter and its frequency |
| WO2025015560A1 (en) * | 2023-07-19 | 2025-01-23 | Telefonaktiebolaget Lm Ericsson (Publ) | A ceramic cavity filter, an antenna filter unit and a radio device comprising the filter |
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| CN102377002A (en) * | 2010-08-19 | 2012-03-14 | 安徽信安通讯技术有限公司 | Radio-frequency filter in mixed mode |
| CN102760923A (en) * | 2012-08-02 | 2012-10-31 | 深圳市国人射频通信有限公司 | Medium filter |
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|---|---|---|---|---|
| CN1301055A (en) * | 1999-11-05 | 2001-06-27 | 株式会社村田制作所 | Dielectric resonator, dielectric filter, dielectric duplexer and communication device |
| CN102377002A (en) * | 2010-08-19 | 2012-03-14 | 安徽信安通讯技术有限公司 | Radio-frequency filter in mixed mode |
| CN102760923A (en) * | 2012-08-02 | 2012-10-31 | 深圳市国人射频通信有限公司 | Medium filter |
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| 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 |
| CN109818116A (en) * | 2019-03-27 | 2019-05-28 | 深圳市国人射频通信有限公司 | A kind of adjustment method of dielectric waveguide filter and its frequency |
| WO2025015560A1 (en) * | 2023-07-19 | 2025-01-23 | Telefonaktiebolaget Lm Ericsson (Publ) | A ceramic cavity filter, an antenna filter unit and a radio device comprising the filter |
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