CN103855455A - Harmonic oscillator, resonant cavity, filter component and electromagnetic wave device - Google Patents
Harmonic oscillator, resonant cavity, filter component and electromagnetic wave device Download PDFInfo
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- CN103855455A CN103855455A CN201310364327.2A CN201310364327A CN103855455A CN 103855455 A CN103855455 A CN 103855455A CN 201310364327 A CN201310364327 A CN 201310364327A CN 103855455 A CN103855455 A CN 103855455A
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- harmonic oscillator
- resonant cavity
- shrinkage pool
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Abstract
The invention relates to a harmonic oscillator. The harmonic oscillator comprises a medium body, wherein a concave hole is formed in the surface of the medium body, a conducting layer made of conducting materials is arranged in the concave hole, the conducting layer is a metal barrel, the medium body is tubular, and the metal barrel is sleeved with the medium body. The invention further relates to a resonant cavity, a filter component and an electromagnetic wave device, wherein the resonant cavity is provided with the harmonic oscillator. By the adoption of the harmonic oscillator with the conducting layer, the resonant frequency of the resonant cavity with the harmonic oscillator can be reduced conveniently, the size of the resonant cavity is largely reduced, and accordingly the size of the filter component with the resonant cavity, and the size of the electromagnetic wave device decrease remarkably.
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
Conventional metals 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 dielectric resonance and the volume of wire chamber can be larger, do not meet the demand of filter miniaturization.How designing that a kind of resonance frequency is low, volume is little and resistance to 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 above-mentioned defect of prior art, provide that a kind of resonance frequency is low, volume is little and resistance to 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: construct a kind of harmonic oscillator, comprise medium body, on described medium body surface, offer shrinkage pool, be provided with the conductive layer that electric conducting material forms in described shrinkage pool; Described 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 conductive layer is attached directly on described shrinkage pool inwall.
In harmonic oscillator of the present invention, described 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 medium body is greater than 1 material by dielectric constant and makes.
In harmonic oscillator of the present invention, described medium body is made up of ceramic material.
In harmonic oscillator of the present invention, described 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 shrinkage pool is blind hole or through hole.
In harmonic oscillator of the present invention, described shrinkage pool is circular port, square opening, truncated cone-shaped hole, square platform shape hole, bellmouth or irregularly shaped.
In harmonic oscillator of the present invention, described conductive layer covers side or the bottom surface of described shrinkage pool inwall or covers the whole inner wall surface of described shrinkage pool.
In harmonic oscillator of the present invention, the electric conducting material of described conductive layer is metal.
In harmonic oscillator of the present invention, described electric conducting material is silver, copper or gold, or for containing in silver, copper or gold the alloy of one or both or three kinds.
In harmonic oscillator of the present invention, the electric conducting material of described conductive layer is the nonmetal of conduction.
In harmonic oscillator of the present invention, described electric conducting material is electrically conductive graphite, indium tin oxide or Al-Doped ZnO.
The invention still further relates to a kind of resonant cavity, comprise cavity, be positioned at the harmonic oscillator of described cavity, described harmonic oscillator is above-mentioned harmonic oscillator, and it comprises medium body, on described medium body surface, offer shrinkage pool, on described shrinkage pool inwall, be attached with the conductive layer that electric conducting material forms; Described conductive layer is metal cylinder, and described medium body is tubular and is set in outside described metal cylinder.
In resonant cavity of the present invention, described resonant cavity also comprises and is contained on described cavity and stretches in described cavity and play tuning tuning plug used, 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, described tuning plug is that dielectric constant is greater than the screw rod that 1 nonmetallic materials make or is metal screw.
In resonant cavity of the present invention, described shrinkage pool is through hole, on the medium body surface being connected, is attached with conductor articulamentum with described through hole.
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.
The invention still further relates to a kind of filtering device, comprise one or more resonant cavitys, at least one resonant cavity is above-mentioned resonant cavity, comprise cavity, be positioned at the harmonic oscillator of described cavity, described harmonic oscillator is above-mentioned harmonic oscillator, it comprises medium body, on described medium body surface, offers shrinkage pool, is attached with the conductive layer that electric conducting material forms on described shrinkage pool inwall; Described conductive layer is metal cylinder, and described medium body is tubular and is set in outside described metal cylinder.
In filtering device of the present invention, described filtering device is filter or duplexer.
In filtering device of the present invention, the 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 multiple 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, between the resonant cavity of described filtering device and resonant cavity, be the coupling of windowing, 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.
The invention still further relates to a kind of electromagnetic wave device, comprise above-mentioned filtering device.
In electromagnetic wave device of the present invention, described electromagnetic wave device is aircraft, radar, base station or satellite.
Implement the present invention, there is following beneficial effect: the present invention is because employing has the harmonic oscillator of 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, there is the filtering device of this resonant cavity and the volume of electromagnetic wave device also can obviously reduce thereupon.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the vertical view of the harmonic oscillator of the preferred embodiment of the present invention;
Fig. 2 be harmonic oscillator shown in Fig. 1 partly cut open front view;
Fig. 3 is the structural representation of the harmonic oscillator of another embodiment;
Fig. 4 be resonant cavity in an embodiment partly cut open vertical view;
Fig. 5 be resonant cavity shown in Fig. 4 partly cut open front view;
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 Fig. 6;
Fig. 8 is the partial structurtes schematic diagram of electromagnetic wave device of the present invention while being base station.
Embodiment
The present invention relates to a kind of harmonic oscillator and there is resonant cavity, filtering device and the electromagnetic wave device of 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, can effectively reduce the filtering device being formed by resonant cavity and there is the volume and weight of the electromagnetic wave device of this filtering device.
Wherein the harmonic oscillator of an embodiment as shown in Figure 1 and Figure 2, comprises medium body 1, offers the shrinkage pool 2 of guided media body 1 inner recess on medium body 1 outer surface, is attached with the conductive layer 3 that electric conducting material forms on all surfaces of shrinkage pool 2 inwalls or part surface.
The material that medium body 1 can be greater than 1 for any dielectric constant, such as polytetrafluoroethylene, epoxy resin, FR4 material etc., but the material that dielectric constant is higher, loss angle tangent is less is more conducive to electromagnetic resonance and reduces resonance frequency, preferably ceramic material in prior art, for example aluminium oxide can be also such as 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 medium body 1 is made and all can as long as having the material of higher dielectric constant and lower loss (dielectric constant is greater than 30 conventionally, and loss angle tangent is less than 0.01).
As shown in Figure 1, the medium body 1 of the present embodiment is 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, the characteristic that this does not have influence on harmonic oscillator of the present invention, is not restricted herein.
Certainly, this shrinkage pool 2 differs and is decided to be through hole, can be also blind hole, does not penetrate into another surperficial hole.For example, this blind hole can be, just highly shorter shape identical with any shape of above-mentioned through hole, can be also other shapes as hemisphere, tetrahedroid etc., be not restricted herein.
In the inner wall surface of shrinkage pool 2, be attached with conductive layer 3, conductive layer 3 is made up of the material that can conduct electricity, preferable alloy, for example silver, copper or gold, or for containing in silver, copper or gold the alloy of one or both or three kinds, also can be that other metal materials or other metal alloy electric conducting materials can be also can conduct electricity nonmetal, for example electrically conductive graphite, indium tin oxide or Al-Doped ZnO.
In embodiment shown in Fig. 3, the cylindrical shape that medium body 1 is even uniform thickness, middle shrinkage pool is through hole.Conductive layer 3 is for having certain thickness metal cylinder, and bottom is provided with flange, and medium body 1 is enclosed within the outer and bottom surface of conductive layer 3 and can be just 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.Preferably the conductive layer of harmonic oscillator is directly connected and ground connection with resonant cavity bottom electrical.
The scope that 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 cover the side of shrinkage pool 2 inwalls, the inner wall section being also 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 the subregion of side and the subregion of bottom surface simultaneously.
Below in conjunction with the concrete applied environment of harmonic oscillator---advantage that resonant cavity illustrates this harmonic oscillator with and with the difference of existing media ceramic harmonic oscillator.
Resonant cavity as shown in Figure 4, Figure 5, comprises cavity 5, harmonic oscillator and tuning plug 4.Wherein, chamber lid is housed on the openend of cavity 5, cavity and chamber lid encloses an enclosure space, and above-mentioned harmonic oscillator is positioned at described enclosure space, and the supporting base that its bottom can be made by a low-loss material (as aluminium oxide etc.) supports harmonic oscillator.Cavity or chamber cover is equipped with tuning plug 4, and tuning plug 4 ends stretch in enclosure space and stretch at least in part in the shrinkage pool 2 of harmonic oscillator.
Tuning plug 4 is generally metal screw, be contained in chamber and cover, and it is adjustable to stretch into length in chamber, thereby among a small circle, regulate the resonance frequency of resonant cavity by nut.Tuning plug 4 also can be made up of ceramic material, or the rod outer surface coated metal of making at a low-loss material or pottery or other high dielectric constant materials.Tuning plug 4 also can be made for nonmetallic materials, as long as its dielectric constant is greater than 1, and the certainly preferred higher material of dielectric constant.The present invention not material to tuning plug 4 and shape does any restriction, thereby as long as its stretch into that cavity 5 is interior can perturbation chamber in electromagnetic field distribution affect resonance frequency.Tuning plug 4 ends can directly contact with shrinkage pool 2 inwalls or conductive layer 3.
In the time that shrinkage pool 2 is through hole, the bottom surface contacting with cavity 5 of medium body 1 can arrange conductor articulamentum, and described conductor articulamentum is that the electric conducting material identical or different from above-mentioned conductive layer 3 made, and couples together with the conductive layer 3 on through-hole wall.Now this conductor articulamentum can be fixed with one by hot pressing or welding or other known interconnection techniques and cavity 5.
In order to strengthen frequency reducing effect, on medium body 1, can be provided with two or shrinkage pool 2 more than two, on one of them shrinkage pool 2, to there being a tuning plug 4, certainly in order to increase perturbation quantity, can a tuning plug 4 be all set in the relative position of each shrinkage pool 2.
To the advantage of resonant cavity of the present invention be described by specific experiment data below.Taking single chamber resonant cavity with pure ceramic dielectric harmonic oscillator as comparative example, this resonant cavity cavity is square column type, this ceramic dielectric harmonic oscillator adopts cylindrical microwave media ceramic, be of a size of external diameter 24mm, internal diameter 8mm, high 19mm, internal diameter corresponds to through hole, the resonance frequency that experiment records the resonant cavity with this dielectric resonance is 1.642GHz, and the average power of this resonant cavity is 275W.
Adopt identical cavity and dielectric resonance (above-mentioned pure ceramic dielectric harmonic oscillator is as the medium body of harmonic oscillator in this example), and plate silver (being the conductive layer in this example) at the through hole (being the shrinkage pool in this example) of this harmonic oscillator, experiment records the resonance frequency of the resonant cavity with this harmonic oscillator and is down to 0.875GHz, and average power is 335W.
As can be seen here, adopt harmonic oscillator of the present invention, with respect to simple dielectric resonance, resonance frequency can be reduced to about 800MHz, be essentially the half of original resonance frequency, corresponding meaning, in the time preparing the resonant cavity of identical resonance frequency, cavity volume will significantly reduce, and little on the impact of power.
And adopt identical cavity, and dielectric resonance is replaced by shape, metal harmonic oscillator that volume is identical, metal harmonic oscillator is the cylindrical shape of external diameter 24mm, internal diameter 8mm, high 19mm, and material is fine copper.The resonance frequency that experiment records the resonant cavity with this metal harmonic oscillator is 1.569GHz, and average power is 54W.
As can be seen here, adopt harmonic oscillator of the present invention, with respect to simple metal harmonic oscillator, still can provide substantially close resonance frequency, average power has improved greatly.
In sum, known employing harmonic oscillator of the present invention, have the resistance to high-power advantage of dielectric resonance, the advantage that resonance frequency is low, volume is little that simultaneously has metal harmonic oscillator concurrently, can widen the resonant cavity of prior art, the range of application of filtering device greatly.
The feature of the resonant cavity based on above-mentioned single chamber, the invention still further relates to a kind of filtering device, can have for filter, duplexer or other device of filter function, and it comprises at least one resonant cavity, and wherein at least one resonant cavity is above-mentioned resonant cavity.
Taking the multicavity filter shown in Fig. 6, Fig. 7 as example.Filter shown in Fig. 6 is the filter with six resonant cavitys.Input 8 and output 9 are equipped with respectively in cavity 5 two ends.
In order to strengthen coupling, between chamber and chamber, be coupled and window on earth for windowing; Meanwhile, multiple 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.Further, each position of windowing is also provided with coupling bar 6, and the length stretching in chamber by coupling bar 6 also can regulate coupling strong and weak.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 as described above, has shrinkage pool 2 and is attached to the conductive layer 3 on shrinkage pool 2 inwalls, and each shrinkage pool 2 correspondences are provided with a tuning plug 4 and insert in shrinkage pool 2.
And then the present invention also protects a kind of electromagnetic wave device with above-mentioned filtering device, this electromagnetic wave device can be any equipment that need to use 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 the signal that institute receives or sends satisfies the demands, therefore electromagnetic wave device at least also comprises the signal emission module being connected with the input of filtering device, the signal receiving module being connected with the output of filtering device.
For example, as shown in Figure 8, electromagnetic wave device is base station, and base station comprises the duplexer as filtering device, and duplexer comprises post a letter band pass filter and collection of letters band pass filter.Post a letter band pass filter input connect sender, output connect 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, signal receiving module is receiver.
The present invention, because employing has the harmonic oscillator of conductive layer 3, is conducive to reduce the resonance frequency of the resonant cavity with this harmonic oscillator, thereby in the time realizing identical resonance frequency, can greatly dwindle the volume of resonant cavity; The existence of medium body makes again whole harmonic oscillator can tolerate high power.Therefore there is the filtering device of this resonant cavity and the volume of electromagnetic wave device also can obviously reduce thereupon, and resistance to high power.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing 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 (23)
1. a harmonic oscillator, is characterized in that, described harmonic oscillator comprises:
Comprise medium body;
On described medium body surface, offer shrinkage pool;
In described shrinkage pool, be provided with the conductive layer that electric conducting material forms;
Described conductive layer is metal cylinder, and described medium body is tubular and is set in outside described metal cylinder.
2. harmonic oscillator according to claim 1, is characterized in that, described medium body is greater than 1 material by dielectric constant and makes.
3. harmonic oscillator according to claim 1, is characterized in that, described medium body is made up of ceramic material.
4. harmonic oscillator according to claim 1, is characterized in that, described shrinkage pool is blind hole or through hole.
5. harmonic oscillator according to claim 1, is characterized in that, described conductive layer covers on the side or bottom surface of described shrinkage pool inwall, or described conductive layer covers in the whole inner wall surface of shrinkage pool inwall.
6. harmonic oscillator according to claim 1, is characterized in that, the electric conducting material of described conductive layer is metal.
7. harmonic oscillator according to claim 6, is characterized in that, described electric conducting material is silver, copper or gold, or for containing in silver, copper or gold the alloy of one or both or three kinds.
8. harmonic oscillator according to claim 1, is characterized in that, the electric conducting material of described conductive layer is the nonmetal of conduction.
9. harmonic oscillator according to claim 8, is characterized in that, described electric conducting material is electrically conductive graphite, indium tin oxide or Al-Doped ZnO.
10. a resonant cavity, comprise cavity, be positioned at the harmonic oscillator of described cavity, it is characterized in that, described harmonic oscillator is the harmonic oscillator as described in claim 1 to 9 any one, it comprises medium body, on described medium body surface, offer shrinkage pool, on described shrinkage pool inwall, be attached with the conductive layer that electric conducting material forms; Described conductive layer is metal cylinder, and described medium body is tubular and is set in outside described metal cylinder.
11. resonant cavitys according to claim 10, is characterized in that, described resonant cavity also comprises and be contained on described cavity and stretch in described cavity body and play tuning tuning plug used, and described tuning plug and described shrinkage pool arrange in opposite directions.
12. resonant cavitys according to claim 11, 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.
13. resonant cavitys according to claim 11, is characterized in that, described tuning plug is that dielectric constant is greater than the screw rod that 1 nonmetallic materials make or is metal screw.
14. resonant cavitys according to claim 12, is characterized in that, described shrinkage pool is through hole, on the medium body surface being connected, are attached with conductor articulamentum with described through hole.
15. resonant cavitys according to claim 14, 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.
16. 1 kinds of filtering devices, comprise one or more resonant cavitys, it is characterized in that, at least one resonant cavity is the resonant cavity as described in claim 10 to 15 any one.
17. filtering devices according to claim 16, is characterized in that, described filtering device is filter or duplexer.
18. filtering devices according to claim 16, is characterized in that, the conductive layer of described harmonic oscillator contacts with ground connection with described resonant cavity.
19. filtering devices according to claim 16, is characterized in that, described filtering device comprises multiple resonant cavitys, are 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.
20. filtering devices according to claim 19, is characterized in that, be the coupling of windowing, and each position of windowing are provided with coupling bar between the resonant cavity of described filtering device and resonant cavity.
21. cavity body filters according to claim 16, is characterized in that, described filtering device is band pass filter, band stop filter, high pass filter, low pass filter or multiband filter.
22. 1 kinds of electromagnetic wave devices, is characterized in that, comprise the filtering device as described in claim 16 to 21 any one.
23. electromagnetic wave devices according to claim 22, is characterized in that, described electromagnetic wave device is aircraft, radar, base station or satellite.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310364327.2A CN103855455B (en) | 2012-11-30 | 2012-11-30 | A kind of harmonic oscillator, resonator, filtering device and electromagnetic wave device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310364327.2A CN103855455B (en) | 2012-11-30 | 2012-11-30 | A kind of harmonic oscillator, resonator, filtering device and electromagnetic wave device |
| CN201210581496.7A CN103022626B (en) | 2012-11-20 | 2012-11-30 | Harmonic oscillator, resonant cavity, filter device and electromagnetic wave equipment |
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| CN201210581496.7A Division CN103022626B (en) | 2012-11-20 | 2012-11-30 | Harmonic oscillator, resonant cavity, filter device and electromagnetic wave equipment |
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| CN103855455A true CN103855455A (en) | 2014-06-11 |
| CN103855455B CN103855455B (en) | 2018-05-22 |
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Cited By (3)
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| WO2017054474A1 (en) * | 2015-09-28 | 2017-04-06 | 中兴通讯股份有限公司 | Resonance cavity and filter |
| EP3324480A1 (en) * | 2016-11-17 | 2018-05-23 | Alcatel Lucent | Resonator, resonator assembly and filter |
| CN112787054A (en) * | 2021-01-07 | 2021-05-11 | 苏州市协诚微波技术有限公司 | Low-loss ceramic dielectric filter |
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| US20030052751A1 (en) * | 1999-07-22 | 2003-03-20 | Matsushita Electric Industrial Co., Ltd. | In-band-flat-group-delay type dielectric filter and linearized amplifier using the same |
| CN1581569A (en) * | 2003-08-04 | 2005-02-16 | 松下电器产业株式会社 | Dielectric resonator, dielectric filter, and method of supporting dielectric resonance element |
| CN101877427A (en) * | 2010-07-02 | 2010-11-03 | 深圳市大富科技股份有限公司 | Communication device, cavity filter, resonating tube and manufacturing method thereof |
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| US20030052751A1 (en) * | 1999-07-22 | 2003-03-20 | Matsushita Electric Industrial Co., Ltd. | In-band-flat-group-delay type dielectric filter and linearized amplifier using the same |
| US6535086B1 (en) * | 2000-10-23 | 2003-03-18 | Allen Telecom Inc. | Dielectric tube loaded metal cavity resonators and filters |
| CN1581569A (en) * | 2003-08-04 | 2005-02-16 | 松下电器产业株式会社 | Dielectric resonator, dielectric filter, and method of supporting dielectric resonance element |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017054474A1 (en) * | 2015-09-28 | 2017-04-06 | 中兴通讯股份有限公司 | Resonance cavity and filter |
| EP3324480A1 (en) * | 2016-11-17 | 2018-05-23 | Alcatel Lucent | Resonator, resonator assembly and filter |
| WO2018091539A1 (en) * | 2016-11-17 | 2018-05-24 | Alcatel Lucent | Resonator, resonator assembly and filter |
| CN112787054A (en) * | 2021-01-07 | 2021-05-11 | 苏州市协诚微波技术有限公司 | Low-loss ceramic dielectric filter |
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