CN105161814A - Dual-mode dielectric cavity resonator and filter - Google Patents
Dual-mode dielectric cavity resonator and filter Download PDFInfo
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- CN105161814A CN105161814A CN201510631350.2A CN201510631350A CN105161814A CN 105161814 A CN105161814 A CN 105161814A CN 201510631350 A CN201510631350 A CN 201510631350A CN 105161814 A CN105161814 A CN 105161814A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/10—Dielectric resonators
- H01P7/105—Multimode resonators
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- 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
- H01P1/2084—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators
- H01P1/2086—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators multimode
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Abstract
The invention discloses a dual-mode dielectric cavity resonator and a dual-mode dielectric cavity filter, which belong to the technical field of multi-mode dielectric filters. The dual-mode dielectric cavity resonator comprises a metal cavity body, a supporting dielectric post loaded in the metal cavity body, and a Jerusalem cross-shaped dielectric placed on the supporting dielectric post, wherein the Jerusalem cross-shaped dielectric comprises a cross-shaped dielectric main body and dielectric side arms which are integrally formed with the cross-shaped dielectric main body. The dual-mode dielectric cavity filter can be implemented based on the dual-mode dielectric cavity resonator, a coaxial input end of the filter is coupled with a degenerate HEH11 mode of the resonator through metal probes, a coaxial output end of the filter is coupled with another degenerate HEH11 mode through metal probes, the polarization directions of electric fields of the two modes are vertical to each other. The dual-mode dielectric cavity resonator generates large electromagnetic field distribution on the side arms, and can obtain high coupling of input/output ends and mode coupling between resonant cavities conveniently; accordingly, the bandwidth of the dual-mode dielectric cavity filter can be wider.
Description
Technical field
The invention discloses bimodulus medium cavity resonator and filter, belong to the technical field of multimode dielectric filter.
Background technology
Current wireless telecommunications development is swift and violent.In the 4G epoch, simultaneously and deposit, vying each other to be the market structure in the long term for multiple standards communication standard and network.In addition other various wireless applications, comprise developing rapidly of the technology such as WLAN (wireless local area network), navigation, bluetooth, the use of current radio spectrum resources is very crowded, and interference is each other also very serious.4G and following 5G mobile communication base station filter, the Out-of-band rejection that duplexer needs are higher, lower loss and less volume.
Field energy can be concentrated on media interior by the medium cavity resonator based on high dielectric ceramic material, reduces conductor losses; Again because dielectric loss is very low, so medium cavity resonator compares coaxial resonator have much higher Q value.People are based on the TE of cylindrical dielectric resonator at first
01 δpattern can realize single mode dielectric filter, obtain lower loss, but volume is larger.
In order to reduce volume, scholar is based on the degeneracy bimodulus HEH in cylindrical resonator
11mode of resonance design dual mode filter, has the mode of resonance that two orthogonal in each resonator, a resonant cavity can be worked as two resonators and be used, and the service efficiency multiplication of volume, cylindrical di cavity dual-mode resonator is as shown in Fig. 1 (a), Fig. 1 (b).The shortcoming of cylindrical resonator is HEH11 pattern is not lowest resonance pattern, and TE01d pattern exists as lower pattern, can produce the clutter passband lower than band connection frequency when designing filter.In addition the high-end clutter pattern of cylindrical resonator also very close to.
Another kind of dual-mode resonator is for cross dielectric resonator structure is as shown in Fig. 2 (a), Fig. 2 (b), the electric field structure of two degeneracy bimodulus wherein and HEH11 Pattern Class are seemingly, but this pattern is basic schema, the resonance frequency of TE01d pattern is raised far away, clutter pattern within the scope of high-end certain frequency is few, and larger without the frequency range of clutter.Its shortcoming is that volume ratio columnar dielectric resonator wants large, and in same volume situation, the resonance frequency of cross dielectric resonator can not be enough low.
In addition have several bimodulus dielectric resonator, the upper and lower surface of its medium contacts with the upper and lower surface of cavity, small volume, but Q value is also lower.
Although there are multiple three mould medium cavity resonator, four mould medium cavity resonator, and the design of filter can be applied to, its debugging difficulty greatly, be difficult to batch production.Bimodulus dielectric filter remains the relatively little and microwave filter scheme that debugging difficulty is moderate of volume.
Summary of the invention
Technical problem to be solved by this invention is the deficiency for above-mentioned background technology, provide bimodulus medium cavity resonator and filter, size is reduced compared with the cross dual-mode resonator of identical resonance frequency, enhance coupling, stray resonance pattern negligible amounts within the scope of the high-end certain frequency of main mould resonance frequency, solves the technical problem that cross dual-mode resonator is oversize, design of filter bandwidth is wide not.
The present invention adopts following technical scheme for achieving the above object:
Bimodulus medium cavity resonator, comprise: metallic cavity, the Supporting Media post be carried in metallic cavity, the Jerusalem cross medium be placed on Supporting Media post, Jerusalem cross medium comprises cross dielectric body and medium side arm integrated with it.
Bimodulus dielectric cavity fluid filter, comprises described bimodulus medium cavity resonator, and the coaxle input end mouth of described filter is by metal probe and a kind of degeneracy HEH
11mode Coupling, the coaxial output line of filter is by metal probe and another kind of degeneracy HEH
11mode Coupling, metallic cavity upper cover plate screws in have and regulates degeneracy HEH
11the tuning tune spiral shell of pattern.
As the further prioritization scheme of described bimodulus dielectric cavity fluid filter, metallic cavity upper cover plate at Jerusalem cross dielectric body and medium side arm surround position corresponding to vacancy screw in and strengthen first of degeneracy Two-mode Coupling size and adjust to be coupled and adjust spiral shell.
The bimodulus dielectric cavity fluid filter of multi-cavity structure, comprises multiple described bimodulus medium cavity resonator, and adjacent two bimodulus medium cavity resonator are by being arranged on the metal probe cascade between resonant cavity cavity window.
As the further prioritization scheme of the bimodulus dielectric cavity fluid filter of described multi-cavity structure, the metallic cavity upper cover plate at multiple bimodulus medium cavity resonator stages connection place screws in have and regulates second of degenerate mode coupling size between adjacent resonators to adjust coupling to adjust spiral shell.
The present invention adopts technique scheme, has following beneficial effect:
(1) the cross medium with four medium side arms makes the Jerusalem cross medium cavity dual-mode resonator that the present invention relates on volume, have larger reduction relative to common cross dual-mode resonator;
(2) relative to cylindrical dual-mode resonator, degeneracy bimodulus mode of resonance is lowest resonance pattern, the stray resonance pattern negligible amounts within the scope of the high-end certain frequency of main mould resonance frequency;
(3) four medium side arm places of Jerusalem cross medium cavity dual-mode resonator create larger electromagnetic field field distribution, the convenient Mode Coupling obtained between stronger input/output terminal coupling resonant cavity, the bimodulus medium cavity resonator of this kind of structure is convenient to realize the slightly wide filter of bandwidth;
(4) vacancy that surrounds of cross dielectric cylinder and four limit arms is convenient inserts that adjusting is coupled adjusts spiral shell, realizes the close coupling between degeneracy bimodulus;
(5) on the basis of bimodulus medium cavity resonator involved in the present invention, screw in the tuning tune spiral shell of mode of resonance at metallic cavity upper cover plate and can realize bimodulus dielectric cavity fluid filter, to compare debugging difficulty less with three moulds of designing filter and four mould dielectric resonators, and the multiple bimodulus medium cavity resonator involved in the present invention of cascade can realize multistage filtering.
Accompanying drawing explanation
Fig. 1 (a), Fig. 1 (b) are end view, the vertical view of cylindrical di cavity dual-mode resonator.
Fig. 2 (a), Fig. 2 (b) are end view, the vertical view of cross medium cavity dual-mode resonator.
Fig. 3 (a), Fig. 3 (b) are end view, the vertical view of Jerusalem cross medium cavity dual-mode resonator.
Fig. 4 (a), Fig. 4 (b) are respectively the cross-polarization pattern of the medium of bimodulus shown in Fig. 3 cavity resonator, the distribution map of the electric field of longitudinal polarization pattern.
Fig. 5 (a), Fig. 5 (b) are end view, the vertical view of the bimodulus dielectric cavity fluid filter (second order) comprising a chamber.
Fig. 6 (a), Fig. 6 (b) are end view, the vertical view of the bimodulus dielectric cavity fluid filter (quadravalence) comprising two chambeies.
The aspect that the present invention adds and advantage will part provide in the following description, and these will become obvious from the following description, or be recognized by practice of the present invention.
Embodiment
Being described below in detail embodiments of the present invention, is exemplary below by the execution mode be described with reference to the drawings, and only for explaining the present invention, and can not be interpreted as limitation of the present invention.
Those skilled in the art of the present technique are appreciated that unless expressly stated, and singulative used herein " ", " one ", " described " and " being somebody's turn to do " also can comprise plural form.Should be further understood that, the wording used in specification of the present invention " comprises " and refers to there is described feature, integer, step, operation, element and/or assembly, but does not get rid of and exist or add other features one or more, integer, step, operation, element, assembly and/or their combination.Should be appreciated that, when we claim element to be " connected " or " coupling " to another element time, it can be directly connected or coupled to other elements, or also can there is intermediary element.In addition, " connection " used herein or " coupling " can comprise wireless connections or couple.Wording "and/or" used herein comprises one or more arbitrary unit listing item be associated and all combinations.
Those skilled in the art will appreciate that unless otherwise defined, all terms used herein have (comprising technical term and scientific terminology) the identical meaning of the general understanding of the ordinary technical staff in the technical field of the invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
For ease of the understanding to the embodiment of the present invention, be further explained explanation below in conjunction with accompanying drawing for several specific embodiment, and each embodiment does not form the restriction to the embodiment of the present invention.
specific embodiment one: Jerusalem cross medium cavity dual-mode resonator
Fig. 3 (a), Fig. 3 (b) give the structural representation of Jerusalem cross medium cavity dual-mode resonator.This bimodulus dielectric resonator comprises a Jerusalem cross high dielectric constant, is installed on support cylinder medium, and loads in metal cavitg.This Jerusalem cross medium comprises a cross dielectric body and four medium side arms.The distribution map of the electric field of cross-polarization pattern, longitudinal polarization pattern is as shown in Fig. 4 (a), Fig. 4 (b).
The design size of bimodulus medium cavity resonator is as follows: metallic cavity length of side 34mm, height 30mm, and inwall is silver-plated; Dielectric support material to be dielectric constant be 9.2 aluminium oxide ceramics, diameter 10mm, height H 1=10mm; The dielectric constant of Jerusalem cross medium is 45, and loss angle tangent is 0.00006, height H 2=7mm; Inner cross length L1=22mm, width W 1=5mm; Four medium side arm lengths L2=17mm, width W 2=5mm.
Four minimum resonance frequencys and Q value are respectively:
| Mode index | Resonance frequency (GHz) | Nonloaded Q |
| 1 | 2.547 | 8560 |
| 2 | 2.548 | 8560 |
| 3 | 3.188 | 797.6 |
| 4 | 3.215 | 10633 |
| 5 | 4.2334 | 7557.37 |
Wherein, pattern 1 and pattern 2 are respectively two modes of resonance of polarization degeneracy, and be lowest resonance pattern, its Q value reaches 8560, suitable with the Q value of the cylindricality HEH11 dual-mode resonator of same cavity volume; The frequency interval of mode 3 and pattern 4 and pattern 1, pattern 2 at more than 0.6GHz, the frequency ratio pattern 1 of pattern 5, the high 1.7GHz of pattern 2, as seen in pattern 1, only have two clutter patterns between pattern 2 and pattern 5, clutter pattern is less, conveniently suppresses.
Can see near the limit arm concentrating on Jerusalem cross medium that the field energy of pattern 1 and pattern 2 is more from Fig. 4 (a), Fig. 4 (b), so just facilitate between resonant cavity and between mode of resonance and input/output port and realize stronger coupling.
specific embodiment two: second order bimodulus dielectric cavity fluid filter
Fig. 5 (a), Fig. 5 (b) are the concrete structure figure of the bimodulus dielectric cavity fluid filter (second order) comprising a chamber: metallic cavity upper cover plate screws in have and regulates degeneracy HEH
11tuning tune spiral shell T1 and T2 of pattern, adjusts spiral shell TI for regulating the resonance frequency of horizontal cross polarization mode, adjusts spiral shell T2 for regulating the resonance frequency of longitudinal polarization pattern; Metallic cavity upper cover plate at Jerusalem cross dielectric body and medium side arm enclose and position corresponding to vacancy screw in the tune strengthening degeneracy Two-mode Coupling and be coupled and adjust spiral shell T3.Coaxle input end mouth P1 to be produced with the cross-polarization pattern of bimodulus medium cavity resonator by probe and is coupled; Cross-polarization pattern is coupled by adjusting spiral shell T3 to produce with longitudinal polarization pattern; Output P2 coaxial line to be produced with longitudinal polarization pattern by probe and is coupled.Regulated the resonance frequency of transverse direction, longitudinal polarization pattern by tuning tune spiral shell T1 and T2 respectively, the bandpass filtering response of second order can be formed thus.
specific embodiment three: quadravalence bimodulus dielectric cavity fluid filter
Fig. 6 (a), Fig. 6 (b) are the concrete structure figure of the bimodulus dielectric cavity fluid filter (quadravalence) comprising two chambeies, wherein: coaxle input end mouth P1 and output port P2 is respectively by the longitudinal polarization Mode Coupling of probe and bimodulus medium cavity resonator 1 and bimodulus medium cavity resonator 2; Two degenerate modes of two resonant cavitys adjust coupling to adjust spiral shell respectively by adjusting spiral shell T3 and T6(T3 and T6 to be first in claim) realize coupling; Utilize probe to realize coupling between two resonant cavity cross-polarization patterns, and spiral shell is adjusted in the second tune coupling of adjusting spiral shell T7(to be in claim) for regulating its coupling size.Spiral shell T1 and T2 is adjusted to be respectively used to regulate the cross-polarization pattern of left side dual-mode resonator and the resonance frequency of longitudinal polarization pattern; Spiral shell T4 and T5 is adjusted to be respectively used to regulate the right cross-polarization pattern of dual-mode resonator and the resonance frequency of longitudinal polarization pattern.The bandpass filtering response of quadravalence can be formed thus.
In sum, the present invention has following beneficial effect:
(1) the cross medium with four medium side arms makes the Jerusalem cross medium cavity dual-mode resonator that the present invention relates on volume, have larger reduction relative to common cross dual-mode resonator;
(2) relative to cylindrical dual-mode resonator, degeneracy bimodulus mode of resonance is lowest resonance pattern, the stray resonance pattern negligible amounts within the scope of the high-end certain frequency of main mould resonance frequency;
(3) four medium side arm places of Jerusalem cross medium cavity dual-mode resonator create larger electromagnetic field field distribution, the convenient Mode Coupling obtained between stronger input/output terminal coupling resonant cavity, the bimodulus medium cavity resonator of this kind of structure is convenient to realize the slightly wide filter of bandwidth;
(4) vacancy that surrounds of cross dielectric cylinder and four limit arms is convenient inserts that adjusting is coupled adjusts spiral shell, realizes the close coupling between degeneracy bimodulus;
(5) on the basis of bimodulus medium cavity resonator involved in the present invention, screw in the tuning tune spiral shell of mode of resonance at metallic cavity upper cover plate and can realize bimodulus dielectric cavity fluid filter, to compare debugging difficulty less with three moulds of designing filter and four mould dielectric resonators, and the multiple bimodulus medium cavity resonator involved in the present invention of cascade can realize multistage filtering.
Claims (5)
1. bimodulus medium cavity resonator, it is characterized in that, comprise: metallic cavity, the Supporting Media post be carried in metallic cavity, the Jerusalem cross medium be placed on Supporting Media post, Jerusalem cross medium comprises cross dielectric body and medium side arm integrated with it.
2. bimodulus dielectric cavity fluid filter, comprises bimodulus medium cavity resonator according to claim 1, it is characterized in that, the coaxle input end mouth of described filter is by metal probe and a kind of degeneracy HEH
11mode Coupling, the coaxial output line of filter is by metal probe and another kind of degeneracy HEH
11mode Coupling, metallic cavity upper cover plate screws in have and regulates degeneracy HEH
11the tuning tune spiral shell of pattern.
3. bimodulus dielectric cavity fluid filter according to claim 2, it is characterized in that, metallic cavity upper cover plate screws on the position that Jerusalem cross dielectric body is corresponding with the vacancy that medium side arm encloses to be strengthened first of degeneracy Two-mode Coupling size and adjusts to be coupled and adjust spiral shell.
4. the bimodulus dielectric cavity fluid filter of multi-cavity structure, is characterized in that, comprises multiple bimodulus medium cavity resonator according to claim 1, and adjacent two bimodulus medium cavity resonator realize coupling by the metal probe being arranged on resonant cavity cavity window place.
5. the bimodulus dielectric cavity fluid filter of multi-cavity structure according to claim 4, it is characterized in that, the metallic cavity upper cover plate at multiple bimodulus medium cavity resonator stages connection place screws in have and regulates second of degenerate mode coupling size between adjacent resonators to adjust coupling to adjust spiral shell.
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| CN201510631350.2A CN105161814A (en) | 2015-09-29 | 2015-09-29 | Dual-mode dielectric cavity resonator and filter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107742765A (en) * | 2017-10-18 | 2018-02-27 | 南通大学 | A kind of difference filter based on bimodulus dielectric patch resonator |
| CN108039543A (en) * | 2017-12-14 | 2018-05-15 | 华南理工大学 | A kind of monomer two-way wave filter based on dielectric resonator |
| WO2019179524A1 (en) * | 2018-03-22 | 2019-09-26 | 华为技术有限公司 | Dual mode resonator, filter, and radiofrequency unit |
| EP3721502A4 (en) * | 2017-12-08 | 2021-07-14 | Nokia Technologies Oy | Multi-mode resonator |
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