CN202564509U

CN202564509U - TM mode dielectric filter

Info

Publication number: CN202564509U
Application number: CN 201220193948
Authority: CN
Inventors: 吴文敬; 吴纯虎
Original assignee: Shenzhen Tatfook Technology Co Ltd
Current assignee: Shenzhen Tatfook Technology Co Ltd
Priority date: 2012-05-03
Filing date: 2012-05-03
Publication date: 2012-11-28
Anticipated expiration: 2022-05-03

Abstract

The utility model relates to communication field, specifically to a TM mode dielectric filter which comprises a cavity having multiple single cavities, a cover plate, and a dielectric resonator arranged in the single cavity; a flying bar used for cross coupling is connected between two staggered single cavities; at least one of the two staggered single cavities is provided on the cavity wall with a first boss; the flying bar is engaged with the first boss through a fastening device, and has the engagement end fixed in the single cavity and the other end fixed in the other single cavity; and the overall height of the first boss, the flying bar and the fastening device in the axial direction of the dielectric resonator does not exceed the cavity upper surface. The TM mode dielectric filter can be mounted or dismounted conveniently; the flying bar having its two ends fixed on the cavity body through bolts or welding, has not high requirement of size precision, and low processing cost; and good contact between the cavity and the cover plate does not result in signal leakage and mutual interference problem between the adjacent cavities, and enables good intermodulation index.

Description

A kind of TM mould dielectric filter

Technical field

The utility model relates to the communications field, is specifically related to a kind of TM mould dielectric filter.

Background technology

In traditional T M mould dielectric filter structure, can use usually and fly the bar syndeton, the concrete structure that flies the bar syndeton generally has following two kinds:

First kind of syndeton is as shown in Figure 1, and first end of feeder line 101 is fixed on the cover plate 102, and second end is fixed on the cavity 103; This kind flies the bar syndeton and is unfavorable for assembling; And the dismounting difficulty, when needing many feeder lines are installed in the dielectric filter, the assembling of feeder line and dismounting are difficult to realize;

Second kind of syndeton is as shown in Figure 2, and first end of sheet metal 201 is fixed on the cavity, and screw is fixed on the cavity after passing cover plate 202 and sheet metal 201.When adopting this kind mode; Sheet metal assembling rear chamber end face is difficult to concordant with cavity cover plate lower surface; When being higher than the cover plate lower surface after the sheet metal assembling; Cover plate and cavity can't fit tightly, and cause existing between the filter adjacent chambers problems such as leakage, phase mutual interference, intermodulation index variation; When being lower than the cover plate lower surface after the sheet metal assembling; Cover plate and cavity can not compress sheet metal; Sheet metal and cavity or and cover plate between have the gap; Will produce " tunnel effect " in interstitial site during the signal transmission, influence the intermodulation index of filter, cause leakage signal between the adjacent chambers, phase mutual interference.

In sum, existing TM mould dielectric filter obviously exists inconvenience and defective on reality is used, so be necessary to improve.

The utility model content

The utility model provides a kind of TM mould dielectric filter, flies the bar syndeton with respect to tradition, and the utility model can not produce the problem of leakage signal, phase mutual interference between adjacent cavity, have better intermodulation index, and assembling is simple, and convenient disassembly.

For achieving the above object; The utility model provides a kind of TM mould dielectric filter; Comprise cavity, cover plate and be arranged at the dielectric resonator in single chamber with a plurality of single chambeies; Between two single chambeies that intersection shifts to install, be connected with and be used for the cross-linked bar that flies; The chamber wall in one of them single chamber in two single chambeies that said intersection shifts to install is provided with first boss, and a said end that flies bar is fixed in said first boss through fastener, and the said other end that flies bar is fixed in second boss of being located at another bottom, single chamber in said two single chambeies through fastener; Perhaps, be equipped with first boss on the chamber wall in two single chambeies that said intersection shifts to install, the said two ends that fly bar are individually fixed in first boss in said two single chambeies through fastener; Said first boss, fly bar and said fastener do not exceed said cavity in the overall height of said dielectric resonator axial direction upper surface.

According to the TM mould dielectric filter of the utility model, said fastener is a screw.

According to the TM mould dielectric filter of the utility model, the said bar that flies is a sheet metal; The said bar two ends that fly are respectively equipped with the through hole adaptive with said screw, and said screw passes the said through hole that flies bar and also the said bar two ends that fly is individually fixed in said first boss and second boss.

According to the TM mould dielectric filter of the utility model, the said bar that flies is a metal feeder, and said metal feeder is welded in said screw, and said screw is bolted in said first boss and second boss.

According to the TM mould dielectric filter of the utility model, said fly bar comprise the vertical part parallel with said dielectric resonator axial direction with the vertical horizontal component of said dielectric resonator axial direction.

According to the TM mould dielectric filter of the utility model, said horizontal component also comprises through that be bent to form and parallel with said dielectric resonator axial direction coupling amount enhancing portion.

According to the TM mould dielectric filter of the utility model, be provided with between two single chambeies that said intersection shifts to install and fly the bar groove, the said bar that flies is placed in this and flies in the bar groove.

The utility model provides on the chamber wall through one of them single chamber in two single chambeies that shift to install in TM mould dielectric filter intersection and is provided with first boss; The matching and fixing of an end that flies bar through the fastener and first boss is in this list chamber, and the other end that flies bar is fixed in another single chamber; Simultaneously first boss, fly bar and said fastener the overall height of dielectric resonator axial direction do not exceed said cavity upper surface, avoid can not fitting tightly between cavity and the cover plate.With respect to traditional bar fixed form that flies; Promptly adopt screw to pass cover plate successively, fly bar and be spirally connected with cavity wall, the flying of the utility model can keep between cover plate and the cavity fitting tightly after bar is installed on the cavity; Between cavity, can not produce the problem of leakage signal, phase mutual interference; Have better intermodulation index, the bar that flies of the utility model assembles simply simultaneously, and convenient disassembly.

Description of drawings

In order to be illustrated more clearly in the technical scheme among the utility model embodiment; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is a kind of cutaway view that flies the bar syndeton in the prior art;

Fig. 2 is the another kind of cutaway view that flies the bar syndeton in the prior art;

Fig. 3 is the three-dimensional view that flies the bar structure of a kind of embodiment of the utility model TM mould dielectric filter;

Fig. 4 is the cutaway view of TM mould dielectric filter among Fig. 3; And

Fig. 5 is the cutaway view of another embodiment of the utility model TM mould dielectric filter.

Embodiment

To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

Like Fig. 3 is the three-dimensional view that flies the bar structure of a kind of embodiment of the utility model TM mould dielectric filter; Fig. 4 is the cutaway view of TM mould dielectric filter among Fig. 3.Can be known that by Fig. 3～Fig. 4 TM mould dielectric filter 100 comprises cavity 301, cover plate 302 and dielectric resonator 303, cover plate 302 capping cavitys 301 form resonant cavity.

Cavity 301 comprises a plurality of single chambeies, between two single chambeies that intersection shifts to install, is connected with the signal that is used for dielectric resonator 303 and carries out the cross-linked bar 304 that flies.The chamber wall in one of them single chamber in two single chambeies that intersection shifts to install is provided with first boss 305; An end that flies bar 304 is fixed in first boss 305 through trip bolt 306; The other end that flies bar 304 is fixed in second boss 307 of the bottom in another single chamber through trip bolt 306, thereby realizes two signal cross couplings between single chamber.Only need get final product when flying bar 304 loading and unloading, be convenient for changing and fly bar 304 through mounting or dismounting trip bolt 306.Obviously, trip bolt 306 also can be realized the device or the part of fastening function for other.

Second boss 307 can play the effect of coupled signal on the one hand, and on the other hand as the connecting portion of screw 306 with cavity 3012, in the time of can preventing that cavity 301 bottoms are relatively thinner, screw is punched cavity.

First boss 305, the overall height on dielectric resonator 303 axial X that flies bar 304 and trip bolt 306 do not exceed the upper surface of cavity 301; Thereby avoid trip bolt 306 or fly 304 pairs of cover plates 302 of bar causing interference, cause between cavity 301 and the cover plate 302 combine not tight.

Obviously; Also first boss 305 can be set all on the chamber wall in two single chambeies that intersection shifts to install; The two ends that fly bar 304 all are individually fixed on the chamber wall in two single chambeies through trip bolt 306, as long as can realize the signal cross coupling between two single chambeies through flying bar 304.

The utility model provides on the chamber wall through one of them single chamber in two single chambeies that shift to install in dielectric filter 100 intersections and is provided with first boss 305; The matching and fixing of an end that flies bar 304 through the fastener and first boss 305 is in this list chamber, and the other end that flies bar 304 is fixed in another single chamber; Simultaneously first boss 305, fly bar 304 and fastener the overall height of dielectric resonator 303 axial directions do not exceed cavity 301 upper surface, avoid can not fitting tightly between cavity 301 and the cover plate 302.With respect to traditional bar fixed form that flies; Promptly adopt screw to pass cover plate successively, fly bar and be spirally connected with cavity wall, the flying of the utility model can keep fitting tightly between cover plate 302 and the cavity 301 after bar 304 is installed on the cavity 301; Between cavity, can not produce the problem of leakage signal, phase mutual interference; Have better intermodulation index, the bar that flies of the utility model assembles simply simultaneously, and convenient disassembly.

Continuous with reference to Fig. 3 and Fig. 4, fly bar 304 and be sheet metal, fly bar 304 two ends and be respectively equipped with the through hole adaptive with screw 306, screw 306 passes the through hole that flies bar 304 and will fly bar 304 two ends and is individually fixed in first boss 305 and second boss 307.

Fly bar 304 and comprise vertical part 3041 parallel and the horizontal component 3042 vertical with dielectric resonator 303 axial directions with dielectric resonator 303 axial direction X.Horizontal component 3042 also comprises through that be bent to form and parallel with dielectric resonator 303 axial directions coupling amount enhancing portion 3043 (promptly doing certain sinking at horizontal component 3042).Because the direction of an electric field in the cavity 303 is parallel with the axial direction X of dielectric resonator 303, what therefore fly bar 304 also must parallelly with the axial direction of dielectric resonator 303 just can be coupled to signal; Present embodiment is provided with first boss 305 in one of them single chamber in two single chambeies that intersection shifts to install; Though guaranteed the applying relation between cavity 301 and the cover plate 302; Fly the length of bar 304 but reduced, therefore set up coupling amount enhancing portion 3043 in the present embodiment and guarantee to fly the coupled relation between bar 304 and the dielectric resonator 303 at the axial direction of dielectric resonator 303.

As shown in Figure 3, intersect to be provided with between two single chambeies shifting to install and fly the bar groove, fly bar 304 and be placed in this and fly in the bar groove.

Fig. 5 is the cutaway view of another embodiment of the utility model TM mould dielectric filter.Be to fly the material of bar 304 and different with different among Fig. 3 and Fig. 4 with the connected mode of first boss 305, second boss 307 and screw 306.In the present embodiment, fly bar 304 and be metal feeder, metal feeder is welded in screw 306, and screw 306 is bolted in first boss 305 or second boss 307.

In sum; The utility model provides on the chamber wall through one of them single chamber in two single chambeies that shift to install in the dielectric filter intersection and is provided with first boss; The matching and fixing of an end that flies bar through the fastener and first boss is in this list chamber, and the other end that flies bar is fixed in another single chamber; Simultaneously first boss, fly bar and said fastener the overall height of dielectric resonator axial direction do not exceed said cavity upper surface, avoid can not fitting tightly between cavity and the cover plate.With respect to traditional bar fixed form that flies; Promptly adopt screw to pass cover plate successively, fly bar and be spirally connected with cavity wall, the flying of the utility model can keep between cover plate and the cavity fitting tightly after bar is installed on the cavity; Between cavity, can not produce the problem of leakage signal, phase mutual interference; Have better intermodulation index, the bar that flies of the utility model assembles simply simultaneously, and convenient disassembly.

Used concrete example among this paper the execution mode of the utility model is set forth, the explanation of above embodiment just is used to help to understand the core concept of the utility model; Simultaneously, for one of ordinary skill in the art, according to the thought of the utility model, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as the restriction to the utility model.

Claims

1. TM mould dielectric filter; Comprise cavity, cover plate and be arranged at the dielectric resonator in single chamber with a plurality of single chambeies; Between two single chambeies that intersection shifts to install, be connected with and be used for the cross-linked bar that flies, it is characterized in that, the chamber wall in the single chamber of one of them in two single chambeies that said intersection shifts to install is provided with first boss; The said matching and fixing of bar through fastener and said first boss that fly is in this list chamber, and the said other end that flies bar is fixed in another single chamber;

Said first boss, fly bar and said fastener do not exceed said cavity in the overall height of said dielectric resonator axial direction upper surface.

2. TM mould dielectric filter according to claim 1; It is characterized in that; The chamber wall in one of them single chamber in two single chambeies that said intersection shifts to install is provided with first boss; A said end that flies bar is fixed in said first boss through fastener, and the said other end that flies bar is fixed in second boss of being located at another bottom, single chamber in said two single chambeies through fastener.

3. TM mould dielectric filter according to claim 1 is characterized in that, is equipped with first boss on the chamber wall in two single chambeies that said intersection shifts to install, and the said two ends that fly bar are individually fixed in first boss in said two single chambeies through fastener.

4. according to each described TM mould dielectric filter of claim 1～3, it is characterized in that said fastener is a screw.

5. TM mould dielectric filter according to claim 4 is characterized in that, the said bar that flies is a sheet metal; The said bar two ends that fly are respectively equipped with the through hole adaptive with said screw, and said screw passes the said through hole that flies bar and also the said bar two ends that fly is individually fixed in said first boss and second boss.

6. TM mould dielectric filter according to claim 4 is characterized in that, the said bar that flies is a metal feeder, and said metal feeder is welded in said screw, and said screw is bolted in said first boss and second boss.

7. TM mould dielectric filter according to claim 1 is characterized in that, said fly bar comprise the vertical part parallel with said dielectric resonator axial direction with the vertical horizontal component of said dielectric resonator axial direction.

8. TM mould dielectric filter according to claim 7 is characterized in that, said horizontal component also comprises through that be bent to form and parallel with said dielectric resonator axial direction coupling amount enhancing portion.

9. TM mould dielectric filter according to claim 1 is characterized in that, is provided with between two single chambeies that said intersection shifts to install and flies the bar groove, and the said bar that flies is placed in this and flies in the bar groove.