CN204103016U - Based on the filter of the cavity resonator of bending grounded probe feed - Google Patents
Based on the filter of the cavity resonator of bending grounded probe feed Download PDFInfo
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- CN204103016U CN204103016U CN201420566240.3U CN201420566240U CN204103016U CN 204103016 U CN204103016 U CN 204103016U CN 201420566240 U CN201420566240 U CN 201420566240U CN 204103016 U CN204103016 U CN 204103016U
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Abstract
The utility model discloses a kind of filter of the cavity resonator based on bending grounded probe feed, comprise rectangular cavities, the first port and the second port, the first port and the second port are arranged in rectangular cavities, and run through outer wall and the inwall of rectangular cavities; First port is provided with the first conductor assembly, and the second port is provided with the second conductor assembly; First conductor assembly comprises the first x-axis to conductor, the first y-axis to conductor and the first z-axis to conductor, and described second conductor assembly comprises the second x-axis to conductor, the second y-axis to conductor and the second z-axis to conductor; In rectangular cavities, the first x-axis is connected to conductor with the first z-axis one end to conductor to one end of conductor by the first y-axis, and the second x-axis is connected to conductor with the second z-axis one end to conductor to one end of conductor by the second y-axis.The utility model has the advantage that structure is simple, handling ease, performance are good, and has wider fractional bandwidth, can meet communication system requirements.
Description
Technical field
The utility model relates to a kind of filter, and especially a kind of filter of the cavity resonator based on bending grounded probe feed, belongs to wireless communication field.
Background technology
Microwave filter is transmitting terminal and the requisite device of receiving terminal in Modern Communication System, and it plays centrifugation to signal, allows useful signal is zero-decrement as far as possible to be passed through, and the decay large as far as possible to useless signal suppresses it to pass through.Along with the development of wireless communication technology, the frequency band between signal is more and more narrow, and this just has higher requirement to the specification of filter and reliability.Cavity body filter have high q-factor, power capacity large, be easy to realize, steady performance and there is very high using value.Cavity body filter, by perforate or add probe between the resonator of each chamber, realizes inductance or capacitive coupling, and by changing the position in hole, the thickness length etc. of size or probe controls the power of coupling inductance or coupling capacitance to realize various filter; And be easy to the cross-couplings that realizes between resonator, by controlling cross-linked quantity and strong and weak position and the number being achieved transmission zero.Due to above feature, the miniaturization of research cavity body filter multi-mode structure, cavity body filter obtains the extensive concern of scholars.
According to investigations with understanding, disclosed prior art is as follows:
1) the separation degenerate mode of resonator generally has four kinds of methods: 1.1) as seen in figure la and lb, when realizing degenerate mode coupling by coupling screws, in order to avoid interacting, its position should be positioned near the electric field strength maximum of two resonance (will be coupled), and all the other degenerate mode electric fields are the region of zero, usual coupling screws becomes 45o with two electric fields polarized, but this coupled modes tunable range is smaller; 1.2) as shown in figures 2 a and 2b, above resonator 45° angle, put in coupling screws, can degenerate mode be separated equally; 1.3) as best shown in figures 3 a and 3b, cut a rectangle corner cut, but this coupled modes are not easily processed; 1.4) as shown in Figs. 4a and 4b, at resonator central fluting, same this coupled modes are not easily processed.
2) nineteen fifty-one woods to be dry academician propose to there is multiple degenerate mode in cylindrical cavity based on the resonance frequency fundamental formular of wave-guide cavity wave internal schema, and devise chamber five mode filter significantly reducing waveguide filter volume, for the research of multimode cavity filter lays the foundation.
3) 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 as shown in Figure 5 a, move in the passband needed for us by several modes of resonance of large young pathbreaker controlling corner cut, its simulation result as shown in Figure 5 b for structure; The structure of this coupled modes is not easily processed.
4) in January, 2004, the human hair table titles such as L.H.Chua are in " Analysis of dielectric loaded cubical cavity for triplemode filter design " article, proposition utilizes coaxial line as feed, as shown in Figure 6 a, adopt the dielectric cavity fluid filter structure of tuning screw, simulation result as shown in Figure 6 b; The tunable scope of structure of this employing coupling screws is fewer, there is certain deficiency.
Utility model content
The purpose of this utility model is the defect in order to solve above-mentioned prior art, provide and a kind of there is the advantage that structure is simple, handling ease, performance are good, and there is wider fractional bandwidth, the filter of the cavity resonator based on bending grounded probe feed of communication system requirements can be met.
The purpose of this utility model can reach by taking following technical scheme:
Based on the filter of the cavity resonator of bending grounded probe feed, it is characterized in that: comprise rectangular cavities, the first port and the second port, described first port and the second port are arranged in rectangular cavities, and run through outer wall and the inwall of rectangular cavities; Described first port is provided with the first conductor assembly, and described second port is provided with the second conductor assembly; Described first conductor assembly comprises the first x-axis to conductor, the first y-axis to conductor and the first z-axis to conductor, and described second conductor assembly comprises the second x-axis to conductor, the second y-axis to conductor and the second z-axis to conductor; In described rectangular cavities, described first y-axis is connected to conductor with the first z-axis one end to conductor to one end of conductor by the first x-axis, and described second y-axis is connected to conductor with the second z-axis one end to conductor to one end of conductor by the second x-axis.
As a kind of preferred version, described first port and the second port are all arranged on the bottom of rectangular cavities; Described first z-axis is the first coaxial inner conductor to conductor, and its other end stretches out rectangular cavities from the first port, and is welded with the first coaxial outer conductor, and described first coaxial outer conductor is fixed on the rectangular cavities outer wall of the first port; Described second z-axis is the second coaxial inner conductor to conductor, and its other end stretches out rectangular cavities from the second port, and is connected with the second coaxial outer conductor, and described second coaxial outer conductor is fixed on the rectangular cavities outer wall of the second port.
Further, described first y-axis extends to the inner left wall of rectangular cavities left to the other end of conductor, and described second y-axis extends to the right side inwall of rectangular cavities to the right to the other end of conductor.
As a kind of preferred version, described first port is arranged on the left side of rectangular cavities, and described second port is arranged on the right side of rectangular cavities; Described first y-axis is the first coaxial inner conductor to conductor, and its other end stretches out rectangular cavities from the first port, and is welded with the first coaxial outer conductor, and described first coaxial outer conductor is fixed on the rectangular cavities outer wall of the first port; Described second y-axis is the second coaxial inner conductor to conductor, and its other end stretches out rectangular cavities from the second port, and is connected with the second coaxial outer conductor, and described second coaxial outer conductor is fixed on the rectangular cavities outer wall of the second port.
Further, described first z-axis all extends downward the bottom interior wall of rectangular cavities to the other end of conductor and the second z-axis to the other end of conductor.
As a kind of preferred version, 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 preferred version, described each sub-miniature A connector is provided with four through holes, described cavity has four screwed holes corresponding with the through hole of sub-miniature A connector in the first port and the position of the second near ports, described each sub-miniature A connector is fixed on rectangular cavities outer wall through coordinating with four screwed holes after four through holes by four screws.
The utility model has following beneficial effect relative to prior art:
1, filter of the present utility model by each port three axis (x-axis, y-axis and z-axis) conductors at rectangular cavities internal control resonance, three axial conductors form bending grounded probe structure, utilize one end of one of them axial conductor to weld coaxial outer conductor and carry out feed, there is the simple feature of high selectivity, high q-factor, design and processing, and there is wider fractional bandwidth, the requirement of miniaturized communication can be met.
2, filter of the present utility model has three obvious resonance points in the frequency range of 6.8GHz ~ 7.2GHz, is the filter of single chamber three mould resonator as seen, 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 bandwidth of cavity filter, and structure is simple, applied range.
Accompanying drawing explanation
Fig. 1 a is resonator (resonator the is cuboid) structure chart adopting the first separation degenerate mode method of prior art.
Fig. 1 b is resonator (resonator the is cylinder) structure chart adopting the first separation degenerate mode method of prior art.
Fig. 2 a is the resonator stereogram adopting prior art the second to be separated degenerate mode method.
Fig. 2 b is the resonator vertical view adopting prior art the second to be separated degenerate mode method.
Fig. 3 a is the resonator stereogram adopting the third separation degenerate mode method of prior art.
Fig. 3 b is the resonator vertical view adopting the third separation degenerate mode method of prior art.
Fig. 4 a is the resonator stereogram adopting prior art the 4th kind to be separated degenerate mode method.
Fig. 4 b is the resonator vertical view adopting prior art the 4th kind to be separated degenerate mode method.
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 a is the dielectric cavity fluid filter structure chart adopting tuning screw in prior art.
Fig. 6 b is the dielectric cavity fluid filter simulation result figure adopting tuning screw in prior art.
Fig. 7 is the filter front view of the utility model embodiment 1.
Fig. 8 is the filter left side view of the utility model embodiment 1.
Fig. 9 is the filter vertical view of the utility model embodiment 1.
Figure 10 is the rectangular cavities vertical view that the utility model embodiment 1 has outputed two ports.
Figure 11 is the rectangular cavities three-dimensional structure diagram that the utility model embodiment 1 has installed two conductor assemblies.
Figure 12 is sub-miniature A connector Facad structure schematic diagram in the filter of the utility model embodiment 1.
Figure 13 is sub-miniature A connector side structure schematic diagram in the filter of the utility model embodiment 1.
Figure 14 is the Electromagnetic Simulation curve chart of the filter freguency response of the utility model embodiment 1.
Closed top board schematic diagram when Figure 15 is the filter of processing the utility model embodiment 1.
Lower chamber schematic diagram when Figure 16 is the filter of processing the utility model embodiment 1.
Figure 17 is the filter vertical view of the utility model embodiment 2.
Figure 18 is the filter vertical view of the utility model embodiment 3.
Wherein, 1-rectangular cavities, 2-first port, 3-second port, 4-first x-axis is to conductor, and 5-first y-axis is to conductor, 6-first z-axis is to conductor, and 7-second x-axis is to conductor, and 8-second y-axis is to conductor, 9-second z-axis to conductor, 10-first coaxial outer conductor, 11-second coaxial outer conductor, 12-through hole, 13-screwed hole, 14-screw, 15-end, 16-location hole.
Embodiment
Embodiment 1:
As shown in Fig. 7 ~ Figure 11, the filter of the present embodiment comprises rectangular cavities 1, first port 2 and the second port 3, described first port 2 and the second port 3 are arranged on the bottom of rectangular cavities 1, and run through bottom outer wall and the inwall of rectangular cavities 1, 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 conductor assembly, and described second port 3 place is provided with the first conductor assembly; Described first conductor assembly comprises the first x-axis to conductor 4, first y-axis to conductor 5 and the first z-axis to conductor 6, and described second conductor assembly comprises the second x-axis to conductor 7, second y-axis to conductor 8 and the second z-axis to conductor 9; In described rectangular cavities 1, described first y-axis to be connected to form to conductor 4 and the first z-axis to one end of conductor 6 by the first x-axis to one end of conductor 5 and to bend grounded probe structure, and described second y-axis to be connected to form to conductor 7 and the second z-axis to one end of conductor 9 by the second x-axis to one end of conductor 8 and to bend grounded probe structure; In the present embodiment, described first conductor assembly and the second conductor assembly entirety symmetrical.
Described first z-axis is the first coaxial inner conductor to conductor 6, and its other end stretches out rectangular cavities 1 from the first port 2, and is welded with the first coaxial outer conductor 10, and described first coaxial outer conductor 10 is fixed on rectangular cavities 1 outer wall at the first port 2 place; Described second z-axis is the second coaxial inner conductor to conductor 9, and its other end stretches out rectangular cavities 1 from the second port 3, and is connected with the second coaxial outer conductor 11, and described second coaxial outer conductor 11 is fixed on rectangular cavities 1 outer wall at the second port 3 place; Described first y-axis extends to the inner left wall of rectangular cavities 1 left to the other end of conductor 5, and described second y-axis extends to the right side inwall of rectangular cavities 1 to the right to the other end of conductor 8;
Described first coaxial inner conductor (the first z-axis is to conductor 6) and the second coaxial inner conductor (the second z-axis is to conductor 9) all adopt coupling bar, described first coaxial outer conductor 10 and the second coaxial outer conductor 11 all adopt sub-miniature A connector, the structure of each sub-miniature A connector as shown in Figures 12 and 13, each sub-miniature A connector is provided with four through holes 12, the position of described cavity 1 near the first port 2 and the second port 3 has four screwed holes 13 corresponding with the through hole 12 of sub-miniature A connector, each sub-miniature A connector is fixed on rectangular cavities 1 outer wall by four screws 14 through coordinating with four screwed holes 13 after four through holes 12, the end 15 of sub-miniature A connector welds with coupling bar.
As shown in figure 14, in figure, dotted line represents the Electromagnetic Simulation curve of the filter freguency response of the present embodiment | S
11|, be the return loss of input port; Solid line represents | S
21|, be the forward transmission coefficient of input port to output port, can see in the scope of 6.8GHz ~ 7.2GHz, | S
11| value all below-10dB, and have three obvious resonance points (namely each port three axial conductors constitute three mould resonators).
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, closed top board and lower chamber are respectively as shown in figs, composition graphs 7 ~ Figure 10 processes again, by two x-axis to conductor, two y-axis are to conductor, two z-axis are fixed in lower chamber to conductor, two mouths are outputed as the first port 2 and the second port 3 in the bottom of lower chamber, two ports are corresponding to conductor (two coupling bar) with two z-axis respectively, position near the first port 2 and the second port 3 is outputed respectively four screwed holes 13 corresponding with the through hole 12 of sub-miniature A connector, the position that lower chamber top is not dug is outputed four location holes 16 corresponding with pin, closed top board is outputed four location holes 16, 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 17, described first port 2 is arranged on the left side of rectangular cavities 1, and running through left side outer wall and the inwall of rectangular cavities 1, described second port 3 is arranged on the right side of rectangular cavities 1, and runs through outer right wall and the inwall of rectangular cavities 1; Described first y-axis is the first coaxial inner conductor to conductor 5, and its other end stretches out rectangular cavities 1 from the first port 2, and is welded with the first coaxial outer conductor 10, and described first coaxial outer conductor 10 is fixed on rectangular cavities 1 outer wall at the first port 2 place; Described second y-axis is the second coaxial inner conductor to conductor 8, and its other end stretches out rectangular cavities 1 from the second port 3, and is connected with the second coaxial outer conductor 11, and described second coaxial outer conductor 11 is fixed on rectangular cavities 1 outer wall at the second port 3 place; Described first z-axis all extends downward the bottom interior wall of rectangular cavities 1 to the other end of conductor 6 and the second z-axis to the other end of conductor 9.In the present embodiment, described first conductor assembly and the second conductor assembly entirety symmetrical.All the other are with embodiment 1.
Embodiment 3:
The main feature of the present embodiment is: as shown in figure 18, and described first conductor assembly and the second conductor assembly entirety are about any point Central Symmetry on the longitudinal centre line of rectangular cavities 1.All the other are with embodiment 2.
In above-described embodiment 1 ~ 3, the metal material that described rectangular cavities 1, first conductor assembly and the second conductor assembly 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; 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 (7)
1., based on the filter of the cavity resonator of bending grounded probe feed, it is characterized in that: comprise rectangular cavities, the first port and the second port, described first port and the second port are arranged in rectangular cavities, and run through outer wall and the inwall of rectangular cavities; Described first port is provided with the first conductor assembly, and described second port is provided with the second conductor assembly; Described first conductor assembly comprises the first x-axis to conductor, the first y-axis to conductor and the first z-axis to conductor, and described second conductor assembly comprises the second x-axis to conductor, the second y-axis to conductor and the second z-axis to conductor; In described rectangular cavities, described first y-axis is connected to conductor with the first z-axis one end to conductor to one end of conductor by the first x-axis, and described second y-axis is connected to conductor with the second z-axis one end to conductor to one end of conductor by the second x-axis.
2. the filter of the cavity resonator based on bending grounded probe feed according to claim 1, is characterized in that: described first port and the second port are all arranged on the bottom of rectangular cavities; Described first z-axis is the first coaxial inner conductor to conductor, and its other end stretches out rectangular cavities from the first port, and is welded with the first coaxial outer conductor, and described first coaxial outer conductor is fixed on the rectangular cavities outer wall of the first port; Described second z-axis is the second coaxial inner conductor to conductor, and its other end stretches out rectangular cavities from the second port, and is connected with the second coaxial outer conductor, and described second coaxial outer conductor is fixed on the rectangular cavities outer wall of the second port.
3. the filter of the cavity resonator based on bending grounded probe feed according to claim 2, it is characterized in that: described first y-axis extends to the inner left wall of rectangular cavities left to the other end of conductor, described second y-axis extends to the right side inwall of rectangular cavities to the right to the other end of conductor.
4. the filter of the cavity resonator based on bending grounded probe feed according to claim 1, it is characterized in that: described first port is arranged on the left side of rectangular cavities, described second port is arranged on the right side of rectangular cavities; Described first y-axis is the first coaxial inner conductor to conductor, and its other end stretches out rectangular cavities from the first port, and is welded with the first coaxial outer conductor, and described first coaxial outer conductor is fixed on the rectangular cavities outer wall of the first port; Described second y-axis is the second coaxial inner conductor to conductor, and its other end stretches out rectangular cavities from the second port, and is connected with the second coaxial outer conductor, and described second coaxial outer conductor is fixed on the rectangular cavities outer wall of the second port.
5. the filter of the cavity resonator based on bending grounded probe feed according to claim 4, is characterized in that: described first z-axis all extends downward the bottom interior wall of rectangular cavities to the other end of conductor and the second z-axis to the other end of conductor.
6. the filter of the cavity resonator based on bending grounded probe feed according to any one of claim 2-5, 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.
7. the filter of the cavity resonator based on bending grounded probe feed according to claim 6, it is characterized in that: described each sub-miniature A connector is provided with four through holes, described cavity has four screwed holes corresponding with the through hole of sub-miniature A connector in the first port and the position of the second near ports, described each sub-miniature A connector is fixed on rectangular cavities outer wall through coordinating with four screwed holes after four through holes by four screws.
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| CN201420566240.3U CN204103016U (en) | 2014-09-28 | 2014-09-28 | Based on the filter of the cavity resonator of bending grounded probe feed |
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| CN201420566240.3U CN204103016U (en) | 2014-09-28 | 2014-09-28 | Based on the filter of the cavity resonator of bending grounded probe feed |
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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 |
| CN105449325A (en) * | 2015-12-30 | 2016-03-30 | 华南理工大学 | L-type probe feed-based single-cavity three-mold cavity filter |
| CN105470607A (en) * | 2015-12-30 | 2016-04-06 | 华南理工大学 | Single-cavity triple-mode cavity duplexer based on bending grounded probe feed |
| CN108258373A (en) * | 2018-01-23 | 2018-07-06 | 华南理工大学 | A kind of four mode filter of cavity based on electromagnetism hybrid coupled |
-
2014
- 2014-09-28 CN CN201420566240.3U patent/CN204103016U/en not_active Expired - Fee Related
Cited By (6)
| 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 |
| CN105449325A (en) * | 2015-12-30 | 2016-03-30 | 华南理工大学 | L-type probe feed-based single-cavity three-mold cavity filter |
| CN105470607A (en) * | 2015-12-30 | 2016-04-06 | 华南理工大学 | Single-cavity triple-mode cavity duplexer based on bending grounded probe feed |
| CN105470607B (en) * | 2015-12-30 | 2018-05-15 | 华南理工大学 | Three die cavity body duplexer of single-chamber based on bending grounded probe feed |
| CN108258373A (en) * | 2018-01-23 | 2018-07-06 | 华南理工大学 | A kind of four mode filter of cavity based on electromagnetism hybrid coupled |
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