CN204375897U - Based on the broadband filter of the multimode cavity resonator of coaxial feed probe perturbation - Google Patents
Based on the broadband filter of the multimode cavity resonator of coaxial feed probe perturbation Download PDFInfo
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- CN204375897U CN204375897U CN201520033532.5U CN201520033532U CN204375897U CN 204375897 U CN204375897 U CN 204375897U CN 201520033532 U CN201520033532 U CN 201520033532U CN 204375897 U CN204375897 U CN 204375897U
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Abstract
The utility model discloses a kind of broadband filter of the multimode cavity resonator based on coaxial feed probe perturbation, comprise cavity, the first port and the second port, described first port and the second port are arranged on cavity bottom, and through cavities bottom outer wall and inwall, described first port is provided with the first coaxial inner conductor and the first coaxial outer conductor, described second port is provided with the second coaxial inner conductor and the second coaxial outer conductor, described first coaxial inner conductor welds with the first coaxial outer conductor, and put in cavity from the first port and form feed probes, described second coaxial inner conductor welds with the second coaxial outer conductor, and put in cavity from the second port and form feed probes, described first port, first coaxial inner conductor and the first coaxial outer conductor respectively with the second port, second coaxial inner conductor and the second coaxial outer conductor are about cavity bottom center origin Central Symmetry.The utility model has wider fractional bandwidth, can meet the requirement of communication system.
Description
Technical field
The utility model relates to a kind of filter of cavity body structure, and especially a kind of broadband filter of the multimode cavity resonator based on coaxial feed probe perturbation, belongs to wireless communication field.
Background technology
Along with the development of wireless communication system, more and more in the urgent need to utilizing other confined frequency ranges.Utilize these frequency resources in order to more effective, the filter in microwave telecommunication system is indispensable electronic equipment, and the quality of its performance directly affects the quality of communication system.Along with the communication technology upgrades day by day, higher requirement is proposed to the performance of filter.Such as: small size, lower insertion loss, high selectivity etc.Or there is special requirement to bandwidth.And for cavity body filter, because it has low insertion loss, resistance to high power and widely using, but be subject to bulky restriction and can not apply in certain communications systems.
For the demand, cavity multi-mode filter has lot of advantages: the first, high power capacity; The second, low insertion loss, the 3rd, wave-guide cavity wave multi-mode filter just can realize the filtering characteristic that the several chambeies needed for single mode could realize in a cavity, and therefore, this advantage miniaturized appears undoubtedly.This three large feature ensure that the miniaturization of filter and high performance requirement.For current technology; realize miniaturized most of practical medium multi-mode filter; but undeniable medium multi-mode filter is in product development, manufacture; there is lot of challenges in the realization of especially large-scale production; mainly following problem: one; the parasitic couplings of higher mode product complexity is very large for holotype impact, substantially increases the complexity that emulation is especially debugged.This requires to treat higher mode must by its inherent characteristic, and abatement negative effect, strengthens effectively utilizing; Its two, complicated tunable coupled structure; Its three, expensive processing charges, the cost utilizing dielectric resonator to realize good performance of filter is expensive dielectric material.
According to investigations with understanding, disclosed prior art is as follows:
Filter for cavity body structure will produce multi-mode structure, coupling is there is between each pattern that the excitation in cavity must be made to rise, generally carry out the coupling between pattern by following several method: (1) puts in coupling screws in the direction that resonator is suitable, and structure as illustrated in figs. ia and ib; (2) cut a rectangle corner cut, structure as shown in Figure 2 a and 2 b; (3) at resonator central fluting, structure as shown in Figure 3 a and Figure 3 b shows.For engineer applied, utilize the methods such as coupling screws, corner cut, fluting, actual requirement of engineering can be solved, but complex structure, not easily process.
Nineteen fifty-one, woods is that dry academician also exists multiple degenerate mode based in the resonance frequency fundamental formular proposition cylindrical cavity of wave-guide cavity wave internal schema, and devises chamber five mode filter significantly reducing waveguide filter volume.1992, Shengli Lai and Weigan Lin delivers at IEEE MTT-S Digest and is entitled as " A Five Mode Single Spherical Cavity Microwave Filter " article, author proposes a kind of ball-shaped cavity, the band pass filter of single chamber five mould is achieved by tuning screw and coupling screws, the structural representation of filter as shown in fig. 4 a, test result is as shown in Figure 4 b, narrow from the bandwidth of measurement result this filter known, and complicated structure.
In October, 1998, the people such as G.Lastoria deliver at IEEE MICROWAVE AND GUIDED WAVE LETTERS in the article being entitled as " CAD of Triple-Mode Cavities in Rectangular Waveguide ".Author proposes a kind of three mode structures adopting metallic cavity corner cut, and structure as shown in Figure 5 a, moves in the passband needed for us by controlling several modes of resonance of large young pathbreaker of corner cut, and Fig. 5 b is its simulation result.The structure of this coupled modes is not easily processed, and can realize bandwidth also relative narrower.
Utility model content
The purpose of this utility model is the defect in order to solve above-mentioned prior art, provide a kind of broadband filter of the multimode cavity resonator based on coaxial feed probe perturbation, this filter construction is simple, handling ease, a cavity can be realized and produce three patterns, and only adopt the inner wire of coaxial line to extend in cavity respectively to carry out perturbation can realize three mould resonators at input, output port, also there is wider fractional bandwidth, the requirement of communication system can be met.
The purpose of this utility model can reach by taking following technical scheme:
Based on the broadband filter of the multimode cavity resonator of coaxial feed probe perturbation, comprise cavity, the first port and the second port, described first port and the second port are arranged on cavity bottom, and through cavities bottom outer wall and inwall, described first port is provided with the first coaxial inner conductor and the first coaxial outer conductor, described second port is provided with the second coaxial inner conductor and the second coaxial outer conductor, described first coaxial inner conductor welds with the first coaxial outer conductor, and put in cavity from the first port and form feed probes, described second coaxial inner conductor welds with the second coaxial outer conductor, and put in cavity from the second port and form feed probes, described first port, first coaxial inner conductor and the first coaxial outer conductor respectively with the second port, second coaxial inner conductor and the second coaxial outer conductor are about cavity bottom center origin Central Symmetry.
As a kind of embodiment, described first coaxial outer conductor is fixed on the cavity bottom outer wall of the first port, and described second coaxial outer conductor is fixed on the cavity bottom outer wall of the second port.
As a kind of embodiment, described first coaxial inner conductor and the second coaxial inner conductor all adopt coupling bar, and described first coaxial outer conductor and the second coaxial outer conductor all adopt sub-miniature A connector, and the end of described sub-miniature A connector welds with coupling bar.
As a kind of embodiment, described each sub-miniature A connector is provided with four through holes, described cavity bottom has four screwed holes corresponding with the through hole of sub-miniature A connector on the position of the first port with the second near ports, and described each sub-miniature A connector is fixed on cavity bottom outer wall through coordinating with four screwed holes after four through holes by four screws.
As a kind of embodiment, described cavity is rectangular cavity or cylindrical cavity.
The utility model has following beneficial effect relative to prior art:
1, filter of the present utility model is by arranging two about the centrosymmetric port of bottom centre's initial point (respectively as input port and output port) at cavity bottom, and two coaxial inner conductors are put in cavity from two ports respectively form feed probes, carry out perturbation simultaneously and realize three mould resonators, have that volume is little, performance good, design and process simple feature, and there is wider fractional bandwidth, can be good at the requirement meeting miniaturized communication.
2, filter simulation result of the present utility model shows, three obvious resonance points are had in the scope of 4.3GHz ~ 7.3GHz, visible is the broadband filter adopting single chamber three mould resonator, and the absolute bandwidth of 3GHz can be realized, relative bandwidth reaches 55.8%, overcomes existing filter and adopts produce difficult problem the zero point existing for the singlemode resonance device of single chamber.
3, filter of the present utility model need not process any corner cut or fluting, handling ease, solves the problem of the narrow processed complex of traditional bandwidth of cavity filter, and structure is simple, applied range.
Accompanying drawing explanation
Fig. 1 a is the resonator stereogram that prior art adopts the first coupled modes.
Fig. 1 b is the resonator vertical view that prior art adopts the first coupled modes.
Fig. 2 a is the resonator stereogram that prior art adopts the second coupled modes.
Fig. 2 b is the resonator vertical view that prior art adopts the second coupled modes.
Fig. 3 a is the resonator stereogram that prior art adopts the third coupled modes.
Fig. 3 b is the resonator vertical view that prior art adopts the third coupled modes.
Fig. 4 a is the bandpass filter structures figure being realized single chamber five mould in prior art by tuning screw and coupling screws.
Fig. 4 b is the band pass filter simulation result figure being realized single chamber five mould in prior art by tuning screw and coupling screws.
Fig. 5 a is the three mode filter structure charts adopting metallic cavity corner cut in prior art.
Fig. 5 b is the three mode filter simulation result figure adopting metallic cavity corner cut in prior art.
Fig. 6 is the filter front view of the utility model embodiment 1.
Fig. 7 is the filter left view of the utility model embodiment 1.
Fig. 8 is the filter vertical view of the utility model embodiment 1.
Fig. 9 is the cavity bottom schematic diagram having outputed two ports and screwed hole in the filter of the utility model embodiment 1.
Figure 10 is sub-miniature A connector Facad structure schematic diagram in the filter of the utility model embodiment 1.
Figure 11 is sub-miniature A connector side structure schematic diagram in the filter of the utility model embodiment 1.
Figure 12 is the Electromagnetic Simulation curve chart of the filter freguency response of the utility model embodiment 1.
Lower chamber schematic diagram when Figure 13 is the filter of processing the utility model embodiment 1.
Closed top board schematic diagram when Figure 14 is the filter of processing the utility model embodiment 1.
Figure 15 is the filter vertical view of the utility model embodiment 2.
Wherein, 1-cavity, 2-first port, 3-second port, 4-first coaxial inner conductor, 5-first coaxial outer conductor, 6-second coaxial inner conductor, 7-second coaxial outer conductor, 8-through hole, 9-screwed hole, 10-screw, 11-end, 12-location hole.
Embodiment
Embodiment 1:
As shown in figs. 6-9, the filter of the present embodiment comprises cavity 1, first port 2 and the second port 3, described first port 2 and the second port 3 are arranged on bottom cavity 1, and through cavities 1 bottom outer wall and inwall, described cavity 1 is rectangular cavity, described first port 2 and the second port 3 both can as input ports, again can as output port.
Described first port 2 place is provided with the first coaxial inner conductor 4 and the first coaxial outer conductor 5, described second port 3 place is provided with the second coaxial inner conductor 6 and the second coaxial outer conductor 7, described first coaxial inner conductor 4 welds with the first coaxial outer conductor 5, and put in formation feed probes in cavity 1 from the first port 2, described second coaxial inner conductor 6 welds with the second coaxial outer conductor 7, and put in formation feed probes in cavity 1 from the second port 3, two feed probes are used for signal transmission, in cavity 1, carry out perturbation simultaneously, realize producing three patterns (namely realizing three mould resonators in cavity 1) in cavity 1, described first coaxial outer conductor 5 is fixed in cavity 1 bottom outer wall at the first port 2 place, described second coaxial outer conductor 7 is fixed in cavity 1 bottom outer wall at the second port 3 place, described first port 2, first coaxial inner conductor 4 and the first coaxial outer conductor 5 respectively with the second port 3, second coaxial inner conductor 6 and the second coaxial outer conductor 7 about cavity 1 bottom centre initial point Central Symmetry, can find out it is symmetrical in the present embodiment from Fig. 6 and Fig. 8.
Described first coaxial inner conductor 4 and the second coaxial inner conductor 6 all adopt coupling bar, described first coaxial outer conductor 5 and the second coaxial outer conductor 7 all adopt sub-miniature A connector, the structure of each sub-miniature A connector as shown in Figure 10 and Figure 11, each sub-miniature A connector is provided with four through holes 8, position bottom described cavity 1 near the first port 2 and the second port 3 has four screwed holes 9 corresponding with the through hole 8 of sub-miniature A connector, each sub-miniature A connector is fixed in cavity 1 bottom outer wall by four screws 10 through coordinating with four screwed holes 9 after four through holes 8, the end 11 of sub-miniature A connector welds with coupling bar.
The Electromagnetic Simulation curve of the filter freguency response of the present embodiment as shown in figure 12, in figure | S
11| be the return loss of input port, | S
21| be the forward transmission coefficient of input port to output port, can see in the scope of 4.3GHz ~ 7.3GHz, | S
11| value all below-10dB, and have three obvious resonance points, relative bandwidth reaches 55.8%.
The filter course of processing of the present embodiment is as follows:
Get a cuboid, top is cut, the top of cutting is closed top board, a rectangular cavity is dug out in remaining part of not cutting, this part is made to form lower chamber, lower chamber and closed top board are respectively as shown in Figure 13 and Figure 14, composition graphs 6 ~ Fig. 9 processes again, two mouths are outputed as the first port 2 and the second port 3 in the bottom of lower chamber, the position of the first port 2 and the second port 3 is outputed four screwed holes 9 corresponding with the through hole 8 of sub-miniature A connector respectively, the position that lower chamber top is not dug is outputed four location holes 12 corresponding with pin, closed top board is outputed four location holes 12, after two sub-miniature A connectors are welded with two coupling bars, be separately fixed at the first port 2 and the second port 3 place, by pin, lower chamber and closed top board are fixed again.
Embodiment 2:
The main feature of the present embodiment is: as shown in figure 15, and described cavity 1 is cylindrical cavity, and all the other structures and principle are with embodiment 1.
In above-described embodiment 1 and 2, the metal material that described cavity 1, first coaxial inner conductor 4, first coaxial outer conductor 5, second coaxial inner conductor 6 and the second coaxial outer conductor 7 adopt can be any one of aluminium, iron, tin, copper, silver, gold and platinum, can be maybe any one alloy of aluminium, iron, tin, copper, silver, gold and platinum.
The above; be only the utility model patent preferred embodiment; but the protection range of the utility model patent is not limited thereto; as two port theories in embodiment 1 being arranged on other identical face of cavity; in embodiment 2, two ports can be arranged on the top etc. of cavity; anyly be familiar with those skilled in the art in the scope disclosed in the utility model patent; be equal to according to the technical scheme of the utility model patent and utility model design thereof and replaced or change, all belonged to the protection range of the utility model patent.
Claims (5)
1. based on the broadband filter of the multimode cavity resonator of coaxial feed probe perturbation, comprise cavity, the first port and the second port, it is characterized in that: described first port and the second port are arranged on cavity bottom, and through cavities bottom outer wall and inwall, described first port is provided with the first coaxial inner conductor and the first coaxial outer conductor, described second port is provided with the second coaxial inner conductor and the second coaxial outer conductor, described first coaxial inner conductor welds with the first coaxial outer conductor, and put in cavity from the first port and form feed probes, described second coaxial inner conductor welds with the second coaxial outer conductor, and put in cavity from the second port and form feed probes, described first port, first coaxial inner conductor and the first coaxial outer conductor respectively with the second port, second coaxial inner conductor and the second coaxial outer conductor are about cavity bottom center origin Central Symmetry.
2. the broadband filter of a kind of multimode cavity resonator based on coaxial feed probe perturbation according to claim 1, it is characterized in that: described first coaxial outer conductor is fixed on the cavity bottom outer wall of the first port, described second coaxial outer conductor is fixed on the cavity bottom outer wall of the second port.
3. the broadband filter of a kind of multimode cavity resonator based on coaxial feed probe perturbation according to claim 2, it is characterized in that: described first coaxial inner conductor and the second coaxial inner conductor all adopt coupling bar, described first coaxial outer conductor and the second coaxial outer conductor all adopt sub-miniature A connector, and the end of described sub-miniature A connector welds with coupling bar.
4. the broadband filter of a kind of multimode cavity resonator based on coaxial feed probe perturbation according to claim 3, it is characterized in that: described each sub-miniature A connector is provided with four through holes, described cavity bottom has four screwed holes corresponding with the through hole of sub-miniature A connector on the position of the first port with the second near ports, and described each sub-miniature A connector is fixed on cavity bottom outer wall through coordinating with four screwed holes after four through holes by four screws.
5. the broadband filter of a kind of multimode cavity resonator based on coaxial feed probe perturbation according to any one of claim 1-4, is characterized in that: described cavity is rectangular cavity or cylindrical cavity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520033532.5U CN204375897U (en) | 2015-01-16 | 2015-01-16 | Based on the broadband filter of the multimode cavity resonator of coaxial feed probe perturbation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577275A (en) * | 2015-01-16 | 2015-04-29 | 华南理工大学 | Broadband filter used for multimode cavity resonator and based on coaxial feed probe perturbation |
| CN106058408A (en) * | 2016-08-17 | 2016-10-26 | 中国电子科技集团公司第四十研究所 | Novel waveguide coaxial power divider |
-
2015
- 2015-01-16 CN CN201520033532.5U patent/CN204375897U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577275A (en) * | 2015-01-16 | 2015-04-29 | 华南理工大学 | Broadband filter used for multimode cavity resonator and based on coaxial feed probe perturbation |
| CN104577275B (en) * | 2015-01-16 | 2017-08-25 | 华南理工大学 | The broadband filter of multimode cavity resonator based on coaxial feed probe perturbation |
| CN106058408A (en) * | 2016-08-17 | 2016-10-26 | 中国电子科技集团公司第四十研究所 | Novel waveguide coaxial power divider |
| CN106058408B (en) * | 2016-08-17 | 2019-06-28 | 中国电子科技集团公司第四十一研究所 | A kind of coaxial power splitter of novel waveguide |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 Termination date: 20170116 |