CN203406402U - Cavity filter enabling adjustment of coupling distance - Google Patents
Cavity filter enabling adjustment of coupling distance Download PDFInfo
- Publication number
- CN203406402U CN203406402U CN201320550101.7U CN201320550101U CN203406402U CN 203406402 U CN203406402 U CN 203406402U CN 201320550101 U CN201320550101 U CN 201320550101U CN 203406402 U CN203406402 U CN 203406402U
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- coupling
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- side hole
- stud
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Abstract
The utility model discloses a cavity filter enabling adjustment of a coupling distance. The filter comprises a filter housing formed by a metal cavity box and a metal cover plate. At least two resonant cavities are disposed inside the filter housing. Each dielectric resonant cavity is equipped with a dielectric resonator. A coupling window is disposed between two adjacent dielectric resonators. The coupling window is provided with a rotatable adjustable coupling loop. The adjustable coupling loop comprises a coupling stud, a dielectric tube and a coupling cable. The dielectric tube is nested in the coupling stud. The coupling cable passes through the central axial hole of the dielectric tube. The two ends of the coupling cable are led out from an upper side hole and a lower side hole of the coupling stud and then welded and connected with the coupling stud to form a closed loop structure. The coupling cable comprises a first coupling segment, a coaxial transmission segment and a second coupling segment. The coupling stud rotatably drives the coupling cable to allow the first coupling segment and the second coupling segment to approach or keep away from the two adjacent dielectric resonators in order to increase or decrease the coupling distance between the coupling segments and the dielectric resonators.
Description
Technical field
The utility model relates to the technical field of wireless communication industry, particularly relates to a kind of radio-frequency cavity fluid filter that adopts TM dielectric resonator, specifically a kind of cavity body filter of adjustable coupling distance.
Background technology
TM resonator list chamber is comprised of metal shell and TM dielectric resonator.Metal shell is comprised of two parts, the shell of upper opening and a cover plate covering at opening.TM resonator is a dielectric rod or top, the metallized medium tube of lower surface.The surface metalation of TM resonator is to have good connectivity for the bottom in bonding chamber and cover plate.The magnetic field of TM resonator need be used for producing both positive and negative polarity coupling, and the cover plate that coil is connected to other cavitys from a cavity bottom is the method that standard is done negative pole coupling.And can produce the cable connected mode being just coupled, can be the connection of cover plate and cover plate or the connection of bottom and bottom, the two selects one.In prior art, traditional cavity body filter adopts a coupling copper cash or copper sheet to produce negative coupling between dielectric resonator, and this method exists a lot of problems, for example, be to be first difficult to make to be coupled copper cash or the very strong coupling of copper sheet generation.Next is the value that is difficult to change negative coupling.It three is to be unfavorable for solving in assembling, running into limited negative coupling and the strong and weak problem of adjusting of coupling.Therefore existing cavity body filter coupling effect is desirable not enough.
Summary of the invention
Technical problem to be solved in the utility model is for above-mentioned prior art present situation, and provide have that stiffness of coupling is high, function admirable, assembling easily and can change by rotation the cavity body filter of a kind of adjustable coupling distance of coupling amount.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of cavity body filter of adjustable coupling distance, comprise the filter housing that metallic cavity box and metal cover board by upper shed form, in filter housing, be provided with at least two resonant cavitys, dielectric resonator is all installed in each resonant cavity, between two adjacent dielectric resonators, be provided with coupling window, in coupling window, be provided with rotary adjustable coupling loop, adjustable coupling loop comprises coupling stud and medium tube and coupling cable; Medium tube is nested in coupling stud, coupling cable is through the central shaft hole of medium tube, and the two ends of this coupling cable are weldingly connected and form a closed-loop path structure with coupling stud respectively from the upper-side hole of coupling stud and lower-side hole are drawn, coupling cable is formed with the first coupled section, coaxial transmission line segment and the second coupled section paralleling, the rotary drive coupling line of coupling stud cable the first coupled section and the second coupled section are approached or away from two adjacent dielectric resonators to increase or to reduce the coupling space between coupled section and dielectric resonator.
For optimizing technique scheme, the measure of taking also comprises:
Double-screw bolt and tube coupling that above-mentioned coupling stud is connected by one form, and double-screw bolt is shaped with external screw thread, and tube coupling is shaped with the inner orifice of under shed.
Above-mentioned coupling stud comprises tube coupling and the double-screw bolt that is fixedly welded on tube coupling upper end, and double-screw bolt is shaped with external screw thread, and tube coupling is shaped with the inner orifice of under shed.
Above-mentioned upper-side hole and lower-side hole are respectively the radial hole of the connection inner orifice having at tube coupling upper end side face and lower end side face, on this upper-side hole and lower-side hole vertical view, at a distance of 180, spend, medium tube is nested in the inner orifice of tube coupling, and coupling cable and medium tube are formed with coaxial transmission line segment in tube coupling.
One end that above-mentioned coupling cable is drawn from tube coupling upper-side hole is weldingly fixed on the outer peripheral face of tube coupling lower end, and one end that coupling cable is drawn from tube coupling lower-side hole is weldingly fixed on the outer peripheral face of tube coupling upper end.
One end that above-mentioned coupling cable is drawn from tube coupling upper-side hole is formed with the first coupled section, one end that coupling cable is drawn from tube coupling lower-side hole is formed with the second coupled section, or the coupling cable one end of drawing from tube coupling upper-side hole is formed with the second coupled section, one end that coupling cable is drawn from tube coupling lower-side hole is formed with the first coupled section.
Above-mentioned metal cover board is shaped with the adjusting screw suitable with the external screw thread of double-screw bolt, and adjustable coupling loop is fitted in the lower surface of metal cover board through double-screw bolt spiral, and double-screw bolt extends the upper surface of metal cover board.
Above-mentioned double-screw bolt is fitted with setscrew nut, matches with location, the upper surface of metal cover board in the bottom surface of this setscrew nut.
The end face of above-mentioned double-screw bolt is shaped with cross, yi word pattern or the combined instrument notch of cross one word that facilitates tool using rotation.
Above-mentioned resonant cavity forms by being shaped with next door barrier in metallic cavity box, and coupling window is the upper shed strip window that next door has.
Compared with prior art, the utility model is provided with rotary adjustable coupling loop between coupling window, adjustable coupling loop is by coupling stud and medium tube and coupling cable, coupling cable and medium tube form a coaxial transmission line in the tube coupling of coupling stud, coaxial transmission line impedence will maximize transmission, magnetic field is less than offsetting, thereby can obtain maximum coupling, coupling cable and tube coupling form closed-loop path, make to be linked and packed easily, and when coupling amount regulates, as long as rotation coupling stud just can make coupling line cable approaching or away from dielectric resonator, therefore easy to adjust.The utility model efficiently solves negative coupling limited in the assembling of traditional cavity body filter and the strong and weak problem adjusted of being difficult to of coupling, and has simple in structurely, and assembling easily and debug feature easily.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of the utility model embodiment;
Fig. 2 is that bowing of Fig. 1 is with the aid of pictures;
Fig. 3 is that Fig. 1 removes the structural representation behind adjustable coupling loop;
Fig. 4 is the structural representation in the adjustable coupling loop that is structure as a whole of the utility model coupling stud;
Fig. 5 is that the utility model coupling stud is the structural representation in the adjustable coupling loop of Split type welded structure;
Fig. 6 is that Fig. 4 removes the structural representation after coupling cable;
Fig. 7 is the structural representation of integrative-structure coupling stud.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Fig. 1 is to Figure 7 shows that structural representation of the present utility model.
Reference numeral is wherein: upper-side hole A1, lower-side hole A2, inner orifice D, coupling window K, coupling space S, the first coupled section i1, coaxial transmission line segment i3, the second coupled section i5, filter housing 1, resonant cavity 1a, metallic cavity box 11, metal cover board 12, adjusting screw 12a, next door 13, dielectric resonator 2, adjustable coupling loop 3, coupling stud 31, double-screw bolt 31a, tube coupling 31b, medium tube 32, central shaft hole 32a, coupling cable 33, setscrew nut 4.
As shown in Fig. 1 to 7, the cavity body filter of a kind of adjustable coupling distance of the present utility model, comprise the filter housing 1 that metallic cavity box 11 and metal cover board 12 by upper shed form, in filter housing 1, be provided with at least two resonant cavity 1a, in each resonant cavity 1a, dielectric resonator 2 is all installed, two 2 adjacent of dielectric resonators are provided with coupling window K, in coupling window K, be provided with rotary adjustable coupling loop 3, adjustable coupling loop 3 comprises coupling stud 31 and medium tube 32 and coupling cable 33, medium tube 32 is nested in coupling stud 31, coupling cable 33 is through the central shaft hole 32a of medium tube 32, and the two ends of this coupling cable 33 are weldingly connected and form a closed-loop path structure with coupling stud 31 respectively from the upper-side hole A1 of coupling stud 31 and lower-side hole A2 draw, coupling cable 33 is formed with the first coupled section i1 paralleling, coaxial transmission line segment i3 and the second coupled section i5, the rotary drive coupling line of coupling stud 31 cable 33 the first coupled section i1 and the second coupled section i5 are approached or away from two adjacent dielectric resonators 2 to increase or to reduce the coupling space S of 2 of coupled section and dielectric resonators.The utility model is a kind of radio-frequency cavity fluid filter being applied in wireless communication technology, and the coupling between cavity body filter dielectric resonator is to utilize magnetic field effectively to produce coupling and cross-linked.Thereby in prior art, conventionally adopt a coupling copper cash or copper sheet to form negative coupling circuit from the bottom of a resonant cavity 1a is connected to the cover plate of another resonant cavity 1a, this method not only connects difficulty, and the coupling finiteness problem causing due to the length of coupling copper cash or copper sheet and magnetic field cancellation that electric current produces in the other direction is also difficult to eliminate, and the coupling distance being coupled in conventional art between copper cash or copper sheet and dielectric resonator also can only be done limited adjustment, adjust the damage that also easily causes coupling copper cash simultaneously.The utility model adopts coupling stud 31, medium tube 32 and coupling cable 33 to form revolving adjustable coupling loop 3.It is in aggregates that coupling stud 31 and coupling cable 33 form closed-loop path structures, and coupling cable 33 can form coaxial transmission line with wearing of medium tube 32, because coaxial transmission line can maximize transmission and magnetic field does not have counteracting, thereby can obtain stronger coupling.People can also reach with the mode of dielectric resonator 2 spacings the object that regulates coupling amount to change coupling cable 33 by rotation coupling stud 31 simultaneously.The utility model advantage is: stiffness of coupling is high, wide accommodation, efficiently solves negative coupling limited in the assembling of traditional cavity body filter and the strong and weak problem adjusted of being difficult to of coupling, has simple in structurely, and assembling easily and debug feature easily.
In embodiment, as shown in Fig. 4, Fig. 6 and Fig. 7, double-screw bolt 31a and tube coupling 31b that coupling stud 31 is connected by one form, and double-screw bolt 31a is shaped with external screw thread, and tube coupling 31b is shaped with the inner orifice D of under shed.Coupling stud 31 is integrated workpiece, and be processed into externally threaded double-screw bolt 31a on the top of coupling stud 31, and the boring of the principal piece of coupling stud 31 forms tube coupling 31b.
What certainly coupling stud 31 also can be for Split type structure, as shown in Figure 5, the coupling stud 31 of Split type structure comprises tube coupling 31b and is fixedly welded on the double-screw bolt 31a of tube coupling 31b upper end, in order to make double-screw bolt 31a and tube coupling 31b firm welding, the end face of tube coupling 31b is shaped with detent, the bottom of double-screw bolt 31a is nested in detent and then is weldingly connected, and on double-screw bolt 31a, is shaped with external screw thread, and tube coupling 31b is shaped with the inner orifice D of under shed.
In embodiment, upper-side hole A1 and lower-side hole A2 are respectively the radial hole of the connection inner orifice D having at tube coupling 31b upper end side face and lower end side face, on this upper-side hole A1 and lower-side hole A2 vertical view, at a distance of 180, spend, medium tube 32 is nested in the inner orifice D of tube coupling 31b, and coupling cable 33 and medium tube 32 are formed with coaxial transmission line segment i3 in tube coupling 31b.
In embodiment, one end that coupling cable 33 is drawn from tube coupling 31b upper-side hole A1 is weldingly fixed on the outer peripheral face of tube coupling 31b lower end, and one end that coupling cable 33 is drawn from tube coupling 31b lower-side hole A2 is weldingly fixed on the outer peripheral face of tube coupling 31b upper end.
In embodiment, one end that coupling cable 33 is drawn from tube coupling 31b upper-side hole A1 is formed with the first coupled section i1, one end that coupling cable 33 is drawn from tube coupling 31b lower-side hole A2 is formed with the second coupled section i5, or coupling cable 33 one end of drawing from tube coupling 31b upper-side hole A1 is formed with the second coupled section i5, one end that coupling cable 33 is drawn from tube coupling 31b lower-side hole A2 is formed with the first coupled section i1.
In embodiment, as shown in Figure 3, metal cover board 12 is shaped with the adjusting screw 12a suitable with the external screw thread of double-screw bolt 31a, and adjustable coupling loop 3 is fitted in the lower surface of metal cover board 12 through double-screw bolt 31a spiral, and double-screw bolt 31a extends the upper surface of metal cover board 12.
In embodiment, double-screw bolt 31a is fitted with setscrew nut 4, matches with the location, upper surface of metal cover board 12 in the bottom surface of this setscrew nut 4.The fixed position in the utility model adjustable coupling loop 3 is that the double-screw bolt 31a by screwing on setscrew nut 4 contraction loops realizes.
In embodiment, the end face of double-screw bolt 31a is shaped with cross, yi word pattern or the combined instrument notch of cross one word that facilitates tool using rotation.
In embodiment, resonant cavity 1a forms by being shaped with next door 13 barriers in metallic cavity box 11, and coupling window K is the upper shed strip window that next door 13 has.
The utility model reaches with the distance that increases or reduce between coupling cable and dielectric resonator the object that regulates coupling amount by rotation coupling stud, coaxial transmission line has stronger stiffness of coupling simultaneously, have easy to adjust, the feature of being easy to is installed, efficiently solves conventional art and be coupled weak and be difficult to regulate and equipped problem.
Claims (10)
1. the cavity body filter of an adjustable coupling distance, comprise the filter housing (1) that metallic cavity box (11) and metal cover board (12) by upper shed form, in described filter housing (1), be provided with at least two resonant cavitys (1a), dielectric resonator (2) is all installed in described each resonant cavity (1a), between described two adjacent dielectric resonators (2), be provided with coupling window (K), it is characterized in that: in described coupling window (K), be provided with rotary adjustable coupling loop (3), described adjustable coupling loop (3) comprises coupling stud (31) and medium tube (32) and coupling cable (33), described medium tube (32) is nested in coupling stud (31), described coupling cable (33) is through the central shaft hole (32a) of medium tube (32), and the two ends of this coupling cable (33) are weldingly connected and form a closed-loop path structure with coupling stud (31) respectively from the upper-side hole (A1) of coupling stud (31) and lower-side hole (A2) are drawn, described coupling cable (33) is formed with the first coupled section (i1) paralleling, coaxial transmission line segment (i3) and the second coupled section (i5), described coupling stud (31) rotary drive coupling line cable (33) the first coupled section (i1) and the second coupled section (i5) are approached or away from two adjacent dielectric resonators (2) to increase or to reduce the coupling space (S) between coupled section and dielectric resonator (2).
2. the cavity body filter of a kind of adjustable coupling distance according to claim 1, it is characterized in that: double-screw bolt (31a) and tube coupling (31b) that described coupling stud (31) is connected by one form, described double-screw bolt (31a) is shaped with external screw thread, and described tube coupling (31b) is shaped with the inner orifice (D) of under shed.
3. the cavity body filter of a kind of adjustable coupling distance according to claim 1, it is characterized in that: described coupling stud (31) comprises tube coupling (31b) and is fixedly welded on the double-screw bolt (31a) of tube coupling (31b) upper end, described double-screw bolt (31a) is shaped with external screw thread, and described tube coupling (31b) is shaped with the inner orifice (D) of under shed.
4. according to the cavity body filter of a kind of adjustable coupling distance described in claim 2 or 3, it is characterized in that: described upper-side hole (A1) and lower-side hole (A2) are respectively the radial hole of the connection inner orifice (D) having at tube coupling (31b) upper end side face and lower end side face, on this upper-side hole (A1) and lower-side hole (A2) vertical view, at a distance of 180, spend, described medium tube (32) is nested in the inner orifice (D) of tube coupling (31b), and described coupling cable (33) and medium tube (32) are formed with coaxial transmission line segment (i3) in tube coupling (31b).
5. the cavity body filter of a kind of adjustable coupling distance according to claim 4, it is characterized in that: one end that described coupling cable (33) is drawn from tube coupling (31b) upper-side hole (A1) is weldingly fixed on the outer peripheral face of tube coupling (31b) lower end, one end that described coupling cable (33) is drawn from tube coupling (31b) lower-side hole (A2) is weldingly fixed on the outer peripheral face of tube coupling (31b) upper end.
6. the cavity body filter of a kind of adjustable coupling distance according to claim 5, it is characterized in that: one end that described coupling cable (33) is drawn from tube coupling (31b) upper-side hole (A1) is formed with the first coupled section (i1), one end that described coupling cable (33) is drawn from tube coupling (31b) lower-side hole (A2) is formed with the second coupled section (i5), or one end that described coupling cable (33) is drawn from tube coupling (31b) upper-side hole (A1) is formed with the second coupled section (i5), one end that described coupling cable (33) is drawn from tube coupling (31b) lower-side hole (A2) is formed with the first coupled section (i1).
7. the cavity body filter of a kind of adjustable coupling distance according to claim 6, it is characterized in that: described metal cover board (12) is shaped with the adjusting screw (12a) suitable with the external screw thread of double-screw bolt (31a), described adjustable coupling loop (3) is fitted in the lower surface of metal cover board (12) through double-screw bolt (31a) spiral, described double-screw bolt (31a) extends the upper surface of metal cover board (12).
8. the cavity body filter of a kind of adjustable coupling distance according to claim 7, it is characterized in that: described double-screw bolt (31a) is fitted with setscrew nut (4), matches with the location, upper surface of metal cover board (12) in the bottom surface of this setscrew nut (4).
9. the cavity body filter of a kind of adjustable coupling distance according to claim 8, is characterized in that: the end face of described double-screw bolt (31a) is shaped with cross, yi word pattern or the combined instrument notch of cross one word that facilitates tool using rotation.
10. the cavity body filter of a kind of adjustable coupling distance according to claim 9, it is characterized in that: described resonant cavity (1a) forms by being shaped with next door (13) barrier in metallic cavity box (11), the upper shed strip window that described coupling window (K) has for next door (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320550101.7U CN203406402U (en) | 2013-09-05 | 2013-09-05 | Cavity filter enabling adjustment of coupling distance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320550101.7U CN203406402U (en) | 2013-09-05 | 2013-09-05 | Cavity filter enabling adjustment of coupling distance |
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| Publication Number | Publication Date |
|---|---|
| CN203406402U true CN203406402U (en) | 2014-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320550101.7U Expired - Fee Related CN203406402U (en) | 2013-09-05 | 2013-09-05 | Cavity filter enabling adjustment of coupling distance |
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| CN (1) | CN203406402U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108370076A (en) * | 2015-12-08 | 2018-08-03 | 华为技术有限公司 | The cross coupling device and filter of filter |
-
2013
- 2013-09-05 CN CN201320550101.7U patent/CN203406402U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108370076A (en) * | 2015-12-08 | 2018-08-03 | 华为技术有限公司 | The cross coupling device and filter of filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140122 Termination date: 20200905 |
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| CF01 | Termination of patent right due to non-payment of annual fee |