CN107615575A - Cavity body filter and its low pass piece and preparation method - Google Patents
Cavity body filter and its low pass piece and preparation method Download PDFInfo
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- CN107615575A CN107615575A CN201580079946.4A CN201580079946A CN107615575A CN 107615575 A CN107615575 A CN 107615575A CN 201580079946 A CN201580079946 A CN 201580079946A CN 107615575 A CN107615575 A CN 107615575A
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- filtering section
- pass filtering
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
- H01P1/2039—Galvanic coupling between Input/Output
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
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- Control Of Motors That Do Not Use Commutators (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
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Abstract
A kind of cavity body filter and its low pass piece (1) and preparation method, it includes multiple low pass filtering section (20) and filtering conducting portion (10), and multiple low pass filtering section (20) are arranged at intervals；Filter conducting portion (10) and electrically connect two adjacent low pass filtering section (20) so that multiple low pass filtering section (20) turn on, so that multiple low pass filtering section (20) realization is filtered to the signal more than preset critical；Wherein, it is at least one in multiple low pass filtering section (20) to be provided with mounting hole (21), to pass through the stable fixed low pass piece (1) of mounting hole (21).
Description
The present invention relates to radio-frequency filter technical fields, more particularly to a kind of low pass piece, and the production method of cavity body filter and the cavity body filter using the low pass piece.
As shown in Figure 1, pass component in the prior art includes connecting rod 101 and Insulating heat shrink 102, connecting rod is cylinder, its cover insulation heat-shrinkable T bush 102, after pass component is installed in cavity slot, installing fixed form due to it is directly placed in cavity slot, by both ends, pad is fixed and is positioned, position does not carry out any fixation among pass component, in vacant state, when by external shock, when the factors such as shock influence, pass component can generate mobile or deformation, it influences the intermodulation of radiofrequency signal in turn and jump problem occurs in intermodulation parameter, i.e. radiofrequency signal plays pendulum.
[summary of the invention]
The present invention provides a kind of cavity body filter and its low pass piece and production method, mainly solve in the prior art pass component by external shock, when the factors such as hitting influences, mobile or deformation can be generated, and then influences the intermodulation of radiofrequency signal and the technical problems such as radiofrequency signal plays pendulum.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: provide a kind of low pass piece comprising multiple low pass filtering section and filtering conducting portion, multiple low pass filtering section interval setting；Filtering conducting portion is electrically connected two adjacent low pass filtering section so that multiple low pass filtering section is connected, so that multiple low pass filtering section realization be made to be filtered the signal for being more than preset critical；Wherein, at least one in multiple low pass filtering section is equipped with mounting hole, to fix the low pass piece by mounting hole stabilization.
Wherein, which is horizontal connection conducting portion or bending conducting portion.
Wherein, which includes preceding conduction period, bending conduction period and rear conduction period, and preceding conduction period is from the low pass filtering section toward the adjacent low pass filtering section horizontal extension；Bending conduction period is U-shaped, and one end of the bending conduction period is connect with the preceding conduction period；One end of the conduction period rear conduction period is connect with the other end of the bending conduction period afterwards, the low pass filtering section connection adjacent with this of the other end of the rear conduction period.
Wherein, which is horizontal low pass wave portion or bending low pass filtering section.
Wherein, which includes low-pass filtering horizontal block and low-pass filtering extension block, which is set to the low-pass filtering horizontal block；The two sides in low-pass filtering extension block from the horizontal low pass wave portion upwardly extend.
Wherein, which includes the first sub- low pass filtering section, the second sub- low pass filtering section and the sub- low pass filtering section of third, and the first sub- low pass filtering section is connect with the preceding conduction period；Second sub- low pass filtering section is connect with the rear conduction period, and the second sub- low pass filtering section specification is smaller than the first sub- low pass filtering section；The sub- low pass filtering section of third at least more than one, be connected between the first sub- low pass filtering section and the second sub- low pass filtering section, the sub- low pass filtering section specification of the third is bigger than the first sub- low pass filtering section.
Wherein, which further includes signal input part and signal output section, and signal input part extends from one end of the first sub- low pass filtering section and bending；One end of signal output section from the second sub- low pass filtering section extends and bending of transferring.
Wherein, the extexine of the low pass piece is silver layer.
Wherein, there is layers of copper between the low pass piece extexine and silver coating.
Wherein, the specification of the first sub- low pass filtering section are as follows: length 7.5mm, width is 11.2 ± 0.05mm, with a thickness of 1 ± 0.05mm.
Wherein, which is integrally formed.
To solve above-mentioned technical problem, one technical scheme adopted by the invention is that: a kind of cavity body filter, it is characterized in that, the cavity body filter includes filtering wall, filtering bottom, insulating washer, above-mentioned low pass piece and insulated screw, filtering bottom has mating hole, and the filtering bottom and filtering wall form low pass slot；Insulating washer is placed in the filtering bottom；Above-mentioned low pass piece is set on the insulating washer and is arranged with the filtering wall, the filtering bottom wall interval；Insulated screw successively penetrates the mounting hole, the insulating washer, mating hole, which is fixed on the filtering bottom.
Wherein, which further includes the epoxy glue sticked at around the insulated screw.
Wherein, the material of the insulating washer is Teflon, and the material of the insulated screw is polyetherimide.
Wherein, which is mixed by base rubber and coagulant.
Wherein, which has multiple spaced deep trouths.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of production method of cavity body filter, step include: to make to form low pass piece by etch process, wherein the low pass piece is formed with mounting hole；Make insulating washer；The insulating washer is set to the filtering bottom of cavity body filter；The low pass piece is placed on the insulating washer；Make insulated screw；The low pass piece is fixed in the low pass slot of cavity body filter using the insulated screw, wherein the low pass slot is formed by filtering wall and filtering bottom, and the low pass piece and the filtering wall, the filtering bottom wall interval are arranged.
Wherein, it was somebody's turn to do after making the step of forming low pass piece by etch process further include: in the low pass on piece copper electroplating layer；Silver layer is electroplated in the low pass on piece.
Wherein, the step which is fixed in the low pass slot of cavity body filter is included: later that epoxy glue is put around the insulated screw using the insulated screw by this；The cavity body filter is sent oven cooking cycle 30 minutes as 90 degrees Celsius.
The beneficial effects of the present invention are: being in contrast to the prior art, cavity body filter and its low pass piece of the invention and production method, by the low pass piece of columned pass component design slabbing in the prior art, it includes multiple spaced low pass filtering section, two adjacent low pass filtering section are connected by connector, at least one in multiple spaced low pass filtering section is equipped with mounting hole, to fix the low pass piece in cavity body filter by the mounting hole, its structure is simple, it is convenient and firm to be fixed in cavity body filter, improve the stability of low-pass intermodulation test.
To describe the technical solutions in the embodiments of the present invention more clearly, the accompanying drawings required for describing the embodiments of the present invention are briefly described below, apparently, drawings in the following description are only some embodiments of the invention, for those of ordinary skill in the art, without creative efforts, it is also possible to obtain other drawings based on these drawings, in which:
Fig. 1 is the perspective view of pass component in the prior art；
Fig. 2 is the perspective view of the low pass piece of one embodiment of the invention；
Fig. 3 is the perspective view of the low pass piece of another embodiment of the present invention；
Fig. 4 is the partial schematic diagram of the cavity body filter of another embodiment of the present invention；
Fig. 4 a is the perspective view of the insulating washer in cavity body filter of the invention；
Fig. 4 b is the structural schematic diagram of the insulated screw in cavity body filter of the invention；
Fig. 5 is the production flow diagram of the cavity body filter of one embodiment of the invention；
Fig. 6 is the production flow diagram of the cavity body filter of another embodiment of the present invention；
Fig. 7 a is the test waveform figure of cavity body filter in the prior art；
Fig. 7 b is the test waveform figure of cavity body filter of the present invention.
Following will be combined with the drawings in the embodiments of the present invention, and technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to the scope of protection of the invention.
Referring to Fig. 2, Fig. 2 is the perspective view of the low pass piece of one embodiment of the invention.Low pass piece 1 of the invention is in the form of sheets, it includes multiple spaced low pass filtering section 20, filtering conducting portion 10 is electrically connected the low pass filtering section 20 of adjacent two so that multiple low pass filtering section 20 is connected, the signal for being more than preset critical is filtered to make multiple low pass filtering section 20 realize, the signal can be the signal of 824Mhz~900Mhz, the preferably signal of 850Mhz.At least one in multiple low pass filtering section 20 is equipped with mounting hole 21, to fix the low pass piece 1 by the mounting hole 21 stabilization.
The filtering conducting portion 10 can be linear type, be also possible to flexure type.Specifically, filtering conducting portion 10 to be can be horizontal conducting portion or bending conducting portion.The horizontal conducting portion is connected from low pass filtering section 20 toward adjacent 20 horizontal extension of low pass filtering section.The bending conducting portion includes preceding conduction period 11, bending conduction period 12 and rear conduction period 13, and preceding conduction period 11 is from the low pass filtering section 20 toward adjacent 20 horizontal extension of low pass filtering section；Bending conduction period 12 is U-shaped or half frame-type, one end of the bending conduction period 12 are connect with the preceding conduction period 11；One end of the rear conduction period 13 is connect with the other end of the bending conduction period 12, and the other end of the rear conduction period 13 low pass filtering section 20 adjacent with this connects.
The low pass filtering section 20 is horizontal low pass wave portion or bending low pass filtering section.Horizontal low pass wave portion is in horizontal piece.The bending low pass filtering section includes low-pass filtering horizontal block 201 and low-pass filtering extension block 202, which is set to the low-pass filtering horizontal block 201；The two sides of low-pass filtering extension block 202 from the low-pass filtering horizontal block 201 upwardly extend.
Referring to Fig. 3, Fig. 3 is the perspective view of the low pass piece of another embodiment of the present invention.The low pass filtering section 20 includes that the first sub- low pass filtering section 22, the second sub- low pass filtering section 23 and the sub- low pass filtering section 24 of third, the first sub- low pass filtering section 22 are connect with the preceding conduction period 11；Second sub- low pass filtering section 23 is connect with the rear conduction period 13, and second sub- 23 specification of low pass filtering section is smaller than the first sub- low pass filtering section 22；The sub- low pass filtering section 24 of third at least more than one, the sub- low pass filtering section 24 of third is connected between the first sub- low pass filtering section 22 and the second sub- low pass filtering section 23, and sub- 24 specification of low pass filtering section of the third is bigger than the first sub- low pass filtering section 22.As shown in Figure 3, first sub- low pass filtering section 22, the second sub- low pass filtering section 23, the sub- low pass filtering section 24 of third are respectively 1, it is two that remaining interval, which is connected to the 4th sub- low pass filtering section 25 between the sub- low pass filtering section 24 of third and the second sub- low pass filtering section 23, and the 4th sub- low pass filtering section 25 length low pass filtering section 24 more sub- than third it is long, certainly in other embodiments, can also the number according to the actual needs to each sub- low pass filtering section selected with size.Preferably, the specification of at least one first sub- low pass filtering section 22 are as follows: length 7.5mm, width is 11.2mm ± 0.05mm, with a thickness of 1 ± 0.05mm.Further, filtering conducting portion 10 is also to be multiple, each size for filtering conducting portion 10 can part it is identical, can also be different.
Further, which further includes signal output section 40 and signal input part 50, which further includes signal output section 40 and signal input part 50, and one end of signal output section 40 from the second sub- low pass filtering section 23 extends and bending of transferring.Signal input part 50 extends from one end of the first sub- low pass filtering section 22 and bending.The shape of signal output section 40 and signal input part 50 is mainly designed according to 250 shape of low pass slot of actual cavity body filter, as long as with low pass slot 250 (following figure 4 will be further described) form fit.
Preferably, as shown in Figure 3, the signal output section 40 of the present embodiment includes bottom 41, vertical component effect 42, turning part 43 and protruding portion 44, bottom is extended by the terminal horizontal of the second sub- low pass filtering section 23, vertical component effect 42 is extended vertically upwards by bottom, turning part 43 is extended by the terminal horizontal or bending of vertical component effect 42 and forms 60-90 degree, preferably 90 degree with vertical component effect 42 in vertical direction.Protruding portion 44 projects upwards extension by turning part 43.Signal input part 50 includes flat part 51 and vertical portion 52, and by the front end horizontal extension of the first sub- low pass filtering section 22, vertical portion 52 is extended vertically upwards flat part 51 by flat part 51.
It is mainly made of ledrite inside low pass piece 1 of the invention, the extexine of the low pass piece 1 is silver layer.There is layers of copper between 1 extexine of low pass piece and silver coating.
It is worth noting that low pass piece 1 of the invention can be integrated molding, it is also possible to each component welding and forms.
Please refer to Fig. 4, Fig. 4 a and Fig. 4 b, Fig. 4 is the partial schematic diagram of the cavity body filter of another embodiment of the present invention, Fig. 4 a is the perspective view of the insulating washer in cavity body filter of the invention, and Fig. 4 b is the structural schematic diagram of the insulated screw in cavity body filter of the invention.A kind of cavity body filter of the invention includes filtering wall 210, filtering bottom 220, above-mentioned low pass piece 1, insulating washer 230 and insulated screw 240, and filtering bottom 220 has mating hole 211, and the filtering bottom 220 and filtering wall 210 form low pass slot 250；Insulating washer 230 is placed in the filtering bottom 220, and above-mentioned low pass piece 1 is set on insulating washer 230 and is arranged with the filtering wall 210, the 220 wall interval of filtering bottom, that is, low pass piece 1 does not contact filtering wall 210, filtering wall 220.Insulated screw 240 successively penetrates the mounting hole 21, the insulating washer 230, mating hole 211, which is fixed on the filtering bottom 220.
Insulated screw 240 includes nut 241 and the screw 242 connecting with nut 241, and the diameter of nut 241 is preferably 5.5 ± 0.01mm, and the preferred standard size of screw 242 is M3 × 6-6g, wherein M3 indicates the outer diameter of screw 242 in M3 × 6, and 6 indicate 242 length of screw；6g is that the grade of tolerance of screw 242 is 6.The internal diameter of the insulating washer 230 is 3 ± 0.01mm, with a thickness of 0.8 ± 0.05mm.Certainly the insulated screw 240 and insulating washer 230 that other sizes also may be selected, as long as being matched with mounting hole 21.The material of insulating washer 230 in the present embodiment is Teflon, and the material of the insulated screw 240 is polyetherimide.
To further fix low pass piece 1, which further includes the epoxy glue sticked at around the insulated screw 240.The epoxy glue is mixed by base rubber and coagulant.
Further, which has multiple spaced deep trouths 221, which matches with bending conduction period 12.It is worth noting that bending conduction period 12 does not contact facing the wall and meditating for deep trouth 221.
Referring to Fig. 5, Fig. 5 is the production flow diagram of the cavity body filter of one embodiment of the invention.The step of production method of cavity body filter of the invention includes:
S10: it makes to form low pass piece 1 by etch process；
Specifically, used etch process can be by being transferred to the drawing of low pass piece 1 on blank using photochemistry, and the principle reacted by chemical medicinal liquid is fallen partial corrosion unwanted in blank, to leave low pass piece 1 identical with drawing form factor.Low pass piece 1 after etching is integrally formed, and in the form of sheets, and is formed with mounting hole 21.
S20: production insulating washer 230；
Specifically, insulating washer 230 is made using materials such as Teflons.
S30: the insulating washer 230 is set to the filtering bottom 220 of cavity body filter；
S40: the low pass piece 1 is placed on the insulating washer 230；
S50: production insulated screw 240；
Specifically, insulated screw 240 is made using materials such as polyetherimide.
S60: the low pass piece 1 is fixed in the low pass slot 250 of cavity body filter using the insulated screw 240.
Specifically, preferably, it is 0.2-0.3N × m that the low pass piece 1 is fixed on the torque in cavity body filter by insulated screw 240, the low pass slot 250 is formed by filtering wall 210 and filtering bottom 220, it is arranged since the height of insulating washer 230 is spaced the low pass piece 1 and the filtering bottom 220, it is worth noting that low pass piece 1 is not also contacted with filtering wall 210.
Referring to Fig. 6, Fig. 6 is the production flow diagram of the cavity body filter of another embodiment of the present invention, the present embodiment is substantially the same with above-described embodiment.The making step of the cavity body filter of the present embodiment is specific as follows:
S10: it makes to form low pass piece 1 by etch process；
Specifically, etch process can be by being transferred to the drawing of low pass piece 1 on blank using photochemistry, and the principle reacted by chemical medicinal liquid is fallen partial corrosion unwanted in blank, to leave low pass piece 1 identical with drawing form factor.Low pass piece 1 after etching is integrally formed, and in the form of sheets, and is formed with mounting hole 21.
Can make signal output section 40, signal input part 50 using etch process, the precision at the positions such as various cambers, bending, corner is high in bending conducting portion and rounding off, and ensure 1 impulse- free robustness of low pass piece batch cutting edge of a knife or a sword.
S11: the copper electroplating layer on the low pass piece 1；
Wherein, layers of copper with a thickness of 8 microns.
S12: silver coating is powered in the low pass piece 1；
Wherein, silver layer with a thickness of 2 microns.
S20: production insulating washer 230；
Specifically, insulating washer 230 is made using materials such as Teflons.
S30: the insulating washer 230 is set to the filtering bottom 220 of cavity body filter；
S40: the low pass piece 1 is placed on the insulating washer 230；
S50: production insulated screw 240；
Specifically, insulated screw 240 is made using materials such as polyetherimide.
S60: the low pass piece 1 is fixed in the low pass slot 250 of cavity body filter using the insulated screw 240；
S61: the point epoxy glue around the insulated screw 240；
Specifically, point of use sebific duct point epoxy glue around insulated screw 240 improves stability of the low pass piece 1 in low pass slot 250 so that epoxy glue penetrates into the gap between mounting hole 21, mating hole 211 and insulated screw 240.
The impregnation method of epoxy glue are as follows: base rubber and coagulant are weighed in following ratios with electronic scale from respective container, they are mixed and stirs into uniform grey coloring agent (mixing time is not less than 3 minutes).Wherein, glue ratio: 5 parts of base rubbers, 7 parts of coagulant is mixed.The service life of epoxy glue is epoxy glue at room temperature using the time no more than 60 minutes, therefore the point epoxy glue around insulated screw 240 as early as possible after impregnation.The curing condition of epoxy glue is (24 DEG C) 12 hours at room temperature, and setting time can be shortened by being put into drying oven, specifically, when the use of the temperature of drying oven being 66 DEG C, needs to dry 2 hours；When drying furnace temperature is 90 DEG C, dry 30 minutes, it is worth noting that, the solidification drying temperature of epoxy glue must not exceed 93 DEG C, in order to avoid reduce the viscosity of epoxy glue.
S62: the cavity body filter is sent oven cooking cycle 30 minutes as 90 degrees Celsius.
Fig. 7 a and 7b are please referred to, Fig. 7 a is the test waveform figure of cavity body filter in the prior art, and Fig. 7 b is the test waveform figure of cavity body filter of the present invention.Cavity body filter of the invention can be duplexer, combiner or tower amplifier.
Preferably, when cavity body filter of the invention is duplexer, it is used for the test of 850Mhz low-pass intermodulation, can be certainly also used to test the low-pass intermodulation of other frequency ranges.Now tested using index of the intermodulation testing device to the duplexer before improvement and the above-mentioned duplexer according to the form below of the present invention after improvement:
As shown in Figure 7a, the duplexer intermodulation waveform before improvement is easy jump, and test value fluctuates above and below intermodulation testing index line with passage at any time.As shown in Figure 7b, improved duplexer intermodulation waveform is steady, and test value is no more than intermodulation testing index line as passage at any time is stable always.
Cavity body filter and its low pass piece 1 of the invention and production method, by the low pass piece 1 of columned pass component design slabbing in the prior art, it includes multiple spaced low pass filtering section 20, the low pass filtering section 20 of adjacent two is connected by filtering conducting portion 10, at least one in multiple spaced low pass filtering section 20 is equipped with mounting hole 21, to fix the low pass piece 1 in cavity body filter by the mounting hole 21, its structure is simple, it is convenient and firm to be fixed in cavity body filter, improves the stability of low-pass intermodulation test.
It is to be noted that, the terms such as " first " mentioned in an embodiment of the present invention, " second " "upper", "lower", "left", "right" are only the letter symbols used as needed, it is not limited to this in practice, and the letter symbol may be used interchangeably.
The above description is only an embodiment of the present invention; it is not intended to limit the scope of the invention; it is all to utilize equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content; it is applied directly or indirectly in other relevant technical fields, and is included within the scope of the present invention.
Claims (19)
- A kind of low pass piece, which is characterized in that the low pass piece includes:Multiple low pass filtering section, the multiple low pass filtering section interval setting；Conducting portion is filtered, is electrically connected two adjacent low pass filtering section so that the multiple low pass filtering section is connected, so that the multiple low pass filtering section realization be made to be filtered the signal for being more than preset critical；Wherein, at least one in the multiple low pass filtering section is equipped with mounting hole, to stablize the fixed low pass piece by the mounting hole.
- Low pass piece according to claim 1, which is characterized in that the filtering conducting portion is horizontal connection conducting portion or bending conducting portion.
- Low pass piece according to claim 2, which is characterized in that the bending conducting portion includes:Preceding conduction period, from the low pass filtering section toward the adjacent low pass filtering section horizontal extension；Bending conduction period, U-shaped, one end of the bending conduction period is connect with the preceding conduction period；One end of conduction period afterwards, the rear conduction period is connect with the other end of the bending conduction period, and the other end of the rear conduction period is connect with the adjacent low pass filtering section.
- Low pass piece according to claim 3, which is characterized in that the low pass filtering section is horizontal low pass wave portion or bending low pass filtering section.
- Low pass piece according to claim 4, which is characterized in that the bending low pass filtering section includes:Low-pass filtering horizontal block, the mounting hole are set to the low-pass filtering horizontal block；Low-pass filtering extension block is upwardly extended from the two sides of the low-pass filtering horizontal block.
- Low pass piece according to claim 5, which is characterized in that the low pass filtering section includes:First sub- low pass filtering section is connect with the preceding conduction period；Second sub- low pass filtering section is connect with the rear conduction period, and the second sub- low pass filtering section specification is smaller than the described first sub- low pass filtering section；The sub- low pass filtering section of third, at least more than one is connected between the described first sub- low pass filtering section and the second sub- low pass filtering section, and the sub- low pass filtering section specification of third is bigger than the described first sub- low pass filtering section.
- Low pass piece according to claim 6, which is characterized in that the low pass piece further include:Signal input part extends simultaneously bending from one end of the described first sub- low pass filtering section；Signal output section, extends and bending of transferring from one end of the described second sub- low pass filtering section.
- Low pass piece according to claim 1, which is characterized in that the extexine of the low pass piece is silver layer.
- Low pass piece according to claim 8, which is characterized in that there is layers of copper between the low pass piece extexine and silver coating.
- Low pass piece according to claim 6, which is characterized in that the specification of the first sub- low pass filtering section are as follows: length 7.5mm, width is 11.2 ± 0.05mm, with a thickness of 1 ± 0.05mm.
- Low pass piece according to claim 1, which is characterized in that the low pass piece is integrally formed.
- A kind of cavity body filter, which is characterized in that the cavity body filter includes:Wall is filtered,Bottom is filtered, there is mating hole, the filtering bottom and filtering wall form low pass slot；Insulating washer is placed in the filtering bottom；Low pass piece described in claim 1-11 any one is set on the insulating washer and is arranged with the filtering wall, the filtering bottom wall interval；Insulated screw, successively penetrates the mounting hole, the insulating washer, mating hole, and the low pass piece is fixed on the filtering bottom.
- Cavity body filter according to claim 12, which is characterized in that the cavity body filter further includes the epoxy glue sticked at around the insulated screw.
- Cavity body filter according to claim 12, which is characterized in that the material of the insulating washer is Teflon, and the material of the insulated screw is polyetherimide.
- Cavity body filter according to claim 12, which is characterized in that the epoxy glue is mixed by base rubber and coagulant.
- Cavity body filter according to claim 12, which is characterized in that the filtering bottom has multiple spaced deep trouths.
- A kind of production method of cavity body filter, which is characterized in that the step of production method of the cavity body filter includes:It makes to form low pass piece by etch process, wherein the low pass piece is formed with mounting hole；Make insulating washer；The insulating washer is set to the filtering bottom of cavity body filter；The low pass piece is placed on the insulating washer；Make insulated screw；The low pass piece is fixed in the low pass slot of cavity body filter using the insulated screw, wherein institute It states low pass slot to be formed by filtering wall and filtering bottom, the low pass piece and the filtering wall, the filtering bottom wall interval are arranged.
- The production method of cavity body filter according to claim 17, which is characterized in that it is described make the step of forming low pass piece by etch process after further include:In the low pass on piece copper electroplating layer；Silver layer is electroplated in the low pass on piece.
- The production method of cavity body filter according to claim 17, which is characterized in that described to include: later by the step that the low pass piece is fixed in the low pass slot of cavity body filter using the insulated screwEpoxy glue is put around the insulated screw；The cavity body filter is sent oven cooking cycle 30 minutes as 90 degrees Celsius.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2015/100186 WO2017113328A1 (en) | 2015-12-31 | 2015-12-31 | Cavity filter, low-pass member thereof, and manufacturing method therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107615575A true CN107615575A (en) | 2018-01-19 |
| CN107615575B CN107615575B (en) | 2020-03-24 |
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| CN201580079946.4A Active CN107615575B (en) | 2015-12-31 | 2015-12-31 | Cavity filter, low-pass sheet thereof and manufacturing method |
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| CN (1) | CN107615575B (en) |
| WO (1) | WO2017113328A1 (en) |
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| CN115149232A (en) * | 2021-03-30 | 2022-10-04 | 诺基亚通信公司 | Cavity filter element for cavity filter |
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|---|---|---|---|---|
| EP3451440A1 (en) * | 2017-09-01 | 2019-03-06 | Nokia Technologies Oy | Radiofrequency filter |
| CN115377636B (en) * | 2022-08-19 | 2023-12-15 | 苏州立讯技术有限公司 | Filter and method for manufacturing the same |
| CN116706481B (en) * | 2023-08-07 | 2023-11-03 | 合肥国家实验室 | Absorption filter |
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2015
- 2015-12-31 CN CN201580079946.4A patent/CN107615575B/en active Active
- 2015-12-31 WO PCT/CN2015/100186 patent/WO2017113328A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1067619A1 (en) * | 1999-06-29 | 2001-01-10 | Filtronic LK Oy | Low-pass filter |
| CN201918478U (en) * | 2011-01-06 | 2011-08-03 | 荆州市南湖机械总厂 | P wave band high power air strip line low pass filter |
| CN102386463A (en) * | 2011-08-24 | 2012-03-21 | 京信通信系统（中国）有限公司 | Communication cavity device and combining and distribution structure thereof |
| CN205355219U (en) * | 2015-12-30 | 2016-06-29 | 深圳市大富科技股份有限公司 | Cavity filter and communication radio frequency device |
| CN205646075U (en) * | 2015-12-31 | 2016-10-12 | 深圳市大富科技股份有限公司 | Cavity filter and low pass piece thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115149232A (en) * | 2021-03-30 | 2022-10-04 | 诺基亚通信公司 | Cavity filter element for cavity filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107615575B (en) | 2020-03-24 |
| WO2017113328A1 (en) | 2017-07-06 |
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Address after: 233000 building 4, national financial incubation Industrial Park, 17 Yannan Road, high tech Zone, Bengbu City, Anhui Province Patentee after: Dafu Technology (Anhui) Co., Ltd Address before: 518104, Guangdong, Shenzhen province Baoan District manhole Street oyster road manhole Industrial Company Third Industrial Zone A1, A2, A3 101 and 2 layers, A4 Patentee before: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd. |
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