CN102077411A - Resonator manufacturing method for RF filter and RF filter with the resonator - Google Patents
Resonator manufacturing method for RF filter and RF filter with the resonator Download PDFInfo
- Publication number
- CN102077411A CN102077411A CN2009801246171A CN200980124617A CN102077411A CN 102077411 A CN102077411 A CN 102077411A CN 2009801246171 A CN2009801246171 A CN 2009801246171A CN 200980124617 A CN200980124617 A CN 200980124617A CN 102077411 A CN102077411 A CN 102077411A
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- Prior art keywords
- resonator
- filter
- pipe
- cut
- manufacturing
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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
- H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
- H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/008—Manufacturing resonators
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Disclosed are a method for manufacturing a resonator of an RF filter and an RF filter with the resonator. The disclosed method comprises the steps of: (a) preparing a pipe which is capable of being commercially obtained; (b) cutting the pipe at a predetermined length; and (c) coupling the cut pipe at the predetermined length to the bottom of the RF filter using a resonator. According to the disclosed method, cost and time for manufacture of the resonator for the RF cavity filter are reduced without loss of raw materials.
Description
Technical field
The present invention relates to a kind of manufacture method of resonator, relate in particular to and possess in the manufacture method of the resonator of radio frequency (RF) cavity filter and possess the RF filter of this resonator.
Background technology
RF cavity filter (perhaps RF coaxial filter) is applied to such as in the mobile communication application devices such as base station with various forms, the function that the RF signal of special frequency band is passed through with execution.
Fig. 1 is the figure that the exploded perspective view of general RF cavity filter is shown.
With reference to Fig. 1, the RF cavity filter can comprise input connector 100, out connector 102, a plurality of cavitys 104 that are defined according to a plurality of walls (wall) 120 and a plurality of resonators 106 that are placed in each cavity 104.
In each cavity 104, form RF signal resonance, each cavity is equipped with the resonator 106 that is used to make signal resonance for this reason.According to the mode of resonance of filter, can use the resonator of metal material, also can use the resonator of dielectric material.
Usually, the length of resonator has 1/4 length of centre frequency wavelength.As shown in Figure 1, resonator generally has drum, but also can use the disc type resonator.
In each cavity according to resonance and filtered RF signal by out connector 106 output, and out connector 106 combines with the transmission lines that is used to transmit the RF signal of being exported.
The lid 108 of RF cavity filter is combined with a plurality of tuning (tuning) bolt 110, and tuning bolt is inserted into the cavity inside of RF cavity filter through lid.Tuning bolt 110 is used for the centre frequency of filter and bandwidth are carried out tuning, can adjust centre frequency and bandwidth by adjusting the degree of depth of inserting.
Fig. 2 is the figure that the stereogram of existing general resonator is shown, and Fig. 3 is the figure that the cutaway view of existing general resonator is shown.
With reference to Fig. 2 and Fig. 3, resonator has drum, and the inner groove 200 that is formed with the circle with predetermined radii.Groove is used to insert tuning bolt, and the degree of depth of groove can not produce considerable influence to the characteristic of filter.
And it is porose 202 that the bottom of resonator forms, to be used for resonator is attached to filter by bolt lower end.
In the RF cavity filter as Fig. 2 and Fig. 3, when resonator used the resonator of metal material, resonator was generally made by operator's Cutting Process.
When making existing resonator, form after the drum by utilizing cutting tools, in order to form groove, form resonator through digging out the process of drum.
Therefore the manufacture of aforesaid existing resonator only can cause raw-material waste for form the mode of the shape of resonator by the cutting raw material, needs more cost.
And, need utilize cutting tools to make singly by the operator, therefore need more process time, thereby still cause the increase cost.And then the size that still has a resonator is according to filter specification and difference, and the more problem of stock.
Summary of the invention
Technical problem
In order to solve aforesaid prior art problems, the invention provides a kind of manufacture method of resonator of RF cavity filter of manufacturing cost of the resonator that can save the RF cavity filter and the RF cavity filter that possesses this resonator.
Another object of the present invention is to provide a kind of and can not cause raw-material waste, save the manufacture method of resonator of RF cavity filter of manufacturing time and the RF cavity filter that possesses this resonator.
Solution
To achieve these goals, according to an aspect of the present invention, provide a kind of resonator manufacturing and associated methods of RF filter, comprising: the step of the pipe that preparation can obtain from commercial channels (a); Cut off the step (b) of described pipe by predetermined length; And will effectively make resonator and be attached to the step (c) of the lower end of RF filter by what described predetermined length was cut off.
Preferably, described predetermined length 1/4 length that is the resonance frequency wavelength of filter.
Above-mentioned method also can comprise cutly effectively to be made resonator and generates the bonded block of the lower end that is used to be attached to the RF filter described, and described bonded block is inserted into the step in the hole of described pipe.
Described bonded block can comprise: flat support sector; Be formed at the hole of described support sector; At least one blade part that combines with described support sector and constitute by elastomeric material.
Above-mentioned method also can comprise the step that forms groove along surface, the inside of described cut pipe, fixes to be used for described bonded block is inserted in the described cut pipe.
The lower end of described RF filter is formed with the groove of the screw rod that is used for joint bolt, and described bolt is attached to described groove by connecting described hole, and the head of described bolt is supported by described support sector.
Described step (c) can comprise: the outer surface in the lower end of described cut pipe forms externally threaded step; In the step of the lower end of described RF filter formation corresponding to described externally threaded internal thread; And rotate described cut pipe, described cut duct ligation is incorporated into the step of the lower end of described RF filter.
After described step (c) can form the interference fit groove for the lower end at described RF filter, described cut duct ligation is incorporated into the lower end of described RF filter by interference fit.
Described cut pipe is by the lower end of solder bond to described RF filter.
According to another side of the present invention, prepare long cylinder shape and the inner step (a) that forms porose pipe; Cut off the step (b) of described pipe by predetermined length; And the step (c) that is formed for described cut duct ligation is incorporated into the integrated structure of RF filter.
According to another aspect of the invention, provide a kind of RF filter that comprises the resonator of making according to above-mentioned method.
Beneficial effect
According to the present invention, have the manufacturing cost of the resonator that can save the RF cavity filter, and the advantage that can not cause raw-material waste, can save manufacturing time.
Description of drawings
Fig. 1 is the figure that the exploded perspective view of general RF cavity filter is shown;
Fig. 2 is the figure that the stereogram of existing general resonator is shown;
Fig. 3 is the figure that the cutaway view of existing general resonator is shown;
Fig. 4 is the flow chart that illustrates according to the overall flow of the manufacture method of the resonator of the RF filter of one embodiment of the invention;
Fig. 5 illustrates the figure according to the state that pipe is cut off by predetermined length of one embodiment of the invention;
Fig. 6 is for illustrating according to bolt when resonator is attached to the filter lower end, is inserted into the figure of an example of the bonded block (element) of resonator;
When Fig. 7 is the use bonded block that illustrates according to one embodiment of the invention, the figure of the inside of resonator;
Fig. 8 illustrates the figure that is inserted into the state of resonator inside according to the bonded block of one embodiment of the invention;
Fig. 9 is that the bonded block that utilizes that illustrates according to one embodiment of the invention is attached to resonator the cutaway view of the bonding state figure of filter lower end;
Figure 10 illustrates not use special bonded block, but resonator form external screw thread and directly in conjunction with the time resonator the figure of shape;
Figure 11 is the figure that resonator that Figure 10 is shown is attached to the state of filter lower end.
Embodiment
Below, describe the manufacture method of resonator of RF filter according to a preferred embodiment of the invention and the manufacture method that possesses the RF filter of this resonator in detail with reference to accompanying drawing.
Fig. 4 is the flow chart that illustrates according to the overall flow of the manufacture method of the resonator of the RF filter of one embodiment of the invention.
With reference to Fig. 4, at first prepare the pipe (step 400) that to obtain from commercial channels.At this, pipe is meant by metal material and makes, and the inner general pipe that forms porose long cylinder shape.
According to one embodiment of the invention, pipe can be the pipe that root is made by selected a kind of material in aluminium, invar (Invar), automatic steel (SUM24L), ferroalloy, copper product.As an example, can use the pipe that is applied to water-supply line pipe, medical pipe arrangement, high press fit pipe etc.
Can select to have the pipe of desired diameter corresponding to desired Q value in the RF filter.If do not have the pipe of desired diameter, can satisfy desired Q value by the size of adjusting cavity.
Can prepare by obtaining pipe from commercial channels, perhaps can make pipe according to general pipe manufacturer process.Pipe can be by producing such as general pipe manufacturer technologies such as extrusion process or Sheet Metal Forming Technologies.
If finish pipe, then cut off pipe (step 402) by predetermined length.The shearing length of pipe is corresponding to the centre frequency of RF filter.
Fig. 5 illustrates the state that pipe is cut off according to the length by predetermined of one embodiment of the invention.
With reference to Fig. 5, cut off ready pipe by 1/4 length corresponding to the wavelength of the centre frequency of RF filter.
The cut-out of pipe can utilize general shearing device to carry out.According to a preferred embodiment of the invention, can use by predetermined length sliding tube and the shearing device that cuts off.
In the prior art, in order to make resonator, the operator directly cuts raw material, but according to the present invention, the pipe that can utilize cut-out to obtain is from commercial channels made the shape of resonator.
Existing mode is owing to be the mode that raw material are cut, therefore will inevitably cause raw-material waste, but the present invention is a shape of only making resonator according to the cut-out pipe, therefore can produce the resonator of less expensive under the situation that does not cause raw-material waste.
And, if based on existing mode, then need cut singly by the operator, therefore need the long time.But the present invention only by cutting off the shape that the preprepared pipe just can produce resonator, therefore compared to existing technology, can produce resonator with less manpower, and can produce the more resonator of low price by saving manpower.
Be different from the resonator that as shown in Figure 2 inside has the groove of desired depth, the resonator of making by the cut-out of pipe is that whole inside all forms porose structure.
But the inside of resonator can not produce considerable influence to the work of filter, even use the porose resonator of inner formation by the cut-out official, as long as the length of resonator is identical, the operating characteristic of filter can not change yet.
If made resonator through cutting off pipe, then be formed for resonator is attached to the integrated structure (step 404) of filter lower end, carry out the process (step 406) that resonator is attached to the filter lower end.
According to one embodiment of the invention, can utilize bolt in conjunction with resonator is attached to the filter lower end.At this moment, for the bolt combination, bonded block can be inserted in resonator inside.
According to another embodiment of the present invention, can be by forming external screw thread in the resonator lower end, and form corresponding to described externally threaded internal thread in the filter lower end, carry out combining of resonator and filter thus.
According to still another embodiment of the invention, can be formed for the groove of interference fit, and resonator is attached to the filter lower end according to the mode of interference fit by lower end at filter.
Those skilled in the art should be understood that except above-mentioned combination, can use known various combination.Therefore, under the situation that does not form special integrated structure, can resonator be attached to the filter lower end according to welding manner.
Fig. 6 is for illustrating according to bolt when resonator is attached to the filter lower end, is inserted into the figure of an example of the bonded block (element) of resonator.
With reference to Fig. 5, the hole 604 that is formed at 600 central authorities of support sector for when bolt in conjunction with the time be used for the hole of in-and-out bolt.The big I in hole 604 is set corresponding to the size of screw rod.
Preferably, blade part forms downwards at a predetermined angle from support sector 600, and blade part 602 and support sector 600 are integrally formed, and are made by the metal of elastomeric material.
When Fig. 7 is the use bonded block that illustrates according to one embodiment of the invention, the figure of the inside of resonator, Fig. 8 illustrates the figure that is inserted into the state of resonator inside according to the bonded block of one embodiment of the invention.
With reference to Fig. 7, resonator inside is formed with groove 700 along the surface, inside of resonator.Be used for after bonded block is inserted into resonator inside, the bonded block secure bond being arrived resonator inside along the surperficial groove 700 that forms in the inside of resonator.
That is, when utilizing bonded block that resonator is attached to filter, can increase according to cutting off pipe and make after the shape of resonator, in the inner process that forms groove of resonator.
The top sectional area ratio lower section of bonded block is long-pending little, therefore when bonded block is inserted into resonator, inserts bonded block up from the bottom.
With reference to Fig. 7, a plurality of blade parts 602 of bonded block are inserted in the groove that is formed at the inner surface of resonator because blade part 602 be an elastomeric material, but so the bonded block secure bond arrive resonator.
Fig. 9 is that the bonded block that utilizes that illustrates according to one embodiment of the invention is attached to resonator the cutaway view of the bonding state figure of filter lower end.
With reference to Fig. 9, bolt connects by the hole 604 of bonded block, and support sector's supporting bolt head of bonded block.
The lower end of filter is formed with the externally threaded internal thread corresponding to bolt, and screw rod is inserted into internal thread and is fixed.
Figure 10 illustrates not use special bonded block, but resonator form external screw thread and directly in conjunction with the time resonator the figure of shape, Figure 11 is the figure that resonator that Figure 10 is shown is attached to the state of filter lower end.
With reference to Figure 10 and Figure 11, the lower end of resonator forms external screw thread 1000, and the lower end of filter is formed with the externally threaded internal thread 1100 corresponding to resonator.
At this moment, can increase according to cutting off pipe and produce after the shape of resonator, utilize cutting tools to form externally threaded process in the lower end of resonator.
If form external screw thread, then utilize the resonator mode of rotary harmonic device after the internal thread of being inserted into is finished combining of resonator and filter lower end at resonator.
Above, be illustrated by reference the preferred embodiments of the present invention, but for knowing those skilled in the art, should be known in the scope that does not break away from the thought of the present invention that is recorded in claims and field and can carry out various modifications and changes the present invention.
Claims (13)
1. the manufacturing and the associated methods of the resonator of a radio frequency (RF) filter is characterized in that comprising:
The step of the pipe that preparation can obtain from commercial channels (a);
Cut off the step (b) of described pipe by predetermined length; And
To effectively make resonator and be attached to the step (c) of the lower end of RF filter by what described predetermined length was cut off.
2. the manufacturing of the resonator of RF filter according to claim 1 and associated methods is characterized in that described predetermined length is 1/4 length of the resonance frequency wavelength of filter.
3. the manufacturing of the resonator of RF filter according to claim 1 and associated methods, it is characterized in that also comprising and cutly effectively make resonator and generate the bonded block of the lower end that is used to be attached to the RF filter, and described bonded block is inserted into the step in the hole of described pipe described.
4. the manufacturing of the resonator of RF filter according to claim 3 and associated methods is characterized in that described bonded block comprises: flat support sector; Be formed at the hole of described support sector; At least one blade part that combines with described support sector and constitute by elastomeric material.
5. the manufacturing of the resonator of RF filter according to claim 4 and associated methods, it is characterized in that also comprising the step that forms groove along the surface, inside of described cut pipe, fix to be used for described bonded block is inserted in the described cut pipe.
6. the manufacturing of the resonator of RF filter according to claim 5 and associated methods, it is characterized in that the lower end of described RF filter is formed with the groove of the screw rod that is used for joint bolt, described bolt is attached to described groove by connecting described hole, and the head of described bolt is supported by described support sector.
7. the manufacturing of the resonator of RF filter according to claim 1 and associated methods is characterized in that described step (c) comprising:
Outer surface in the lower end of described cut pipe forms externally threaded step;
In the step of the lower end of described RF filter formation corresponding to described externally threaded internal thread; And
Rotate described cut pipe, described cut duct ligation is incorporated into the step of the lower end of described RF filter.
8. the manufacturing of the resonator of RF filter according to claim 1 and associated methods, it is characterized in that described step (c) for after the lower end of described RF filter formation interference fit groove, is incorporated into described cut duct ligation by interference fit the lower end of described RF filter.
9. the manufacturing of the resonator of RF filter according to claim 1 and associated methods is characterized in that described cut pipe is by the lower end of solder bond to described RF filter.
10. the manufacture method of the resonator of a radio frequency (RF) filter is characterized in that comprising:
Prepare long cylinder shape and the inner step (a) that forms porose pipe;
Cut off the step (b) of described pipe by predetermined length; And
Be formed for described cut duct ligation is incorporated into the step (c) of the integrated structure of RF filter.
11. the manufacture method of the resonator of radio frequency according to claim 10 (RF) filter, it is characterized in that described step (c) comprises the step that forms groove along surface, the inside in the pipe, and the bonded block of at least one blade part that comprises flat support sector, is formed at the hole of described support sector, combines with described support sector and is made of elastomeric material is inserted into the groove of described pipe, and the described blade part of described bonded block is inserted into described groove.
12. the manufacture method of the resonator of radio frequency according to claim 10 (RF) filter is characterized in that described step (c) is the outer surface formation external screw thread in the lower end of described cut pipe.
13. RF filter that comprises the resonator of making according to any described method in the claim 1 to 13.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020080061528A KR101036127B1 (en) | 2008-06-27 | 2008-06-27 | Method for Manufacturing Resonator of RF Filter and RF filter Having the Same |
| KR10-2008-0061528 | 2008-06-27 | ||
| PCT/KR2009/003257 WO2009157672A2 (en) | 2008-06-27 | 2009-06-18 | Resonator manufacturing method for rf filter and rf filter with the resonator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102077411A true CN102077411A (en) | 2011-05-25 |
Family
ID=41445082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801246171A Pending CN102077411A (en) | 2008-06-27 | 2009-06-18 | Resonator manufacturing method for RF filter and RF filter with the resonator |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR101036127B1 (en) |
| CN (1) | CN102077411A (en) |
| WO (1) | WO2009157672A2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102588796B1 (en) * | 2018-05-09 | 2023-10-16 | 주식회사 케이엠더블유 | Cavity filter |
| CN211655005U (en) * | 2018-06-12 | 2020-10-09 | 株式会社Kmw | Cavity filter and connector |
| WO2019240491A1 (en) * | 2018-06-12 | 2019-12-19 | 주식회사 케이엠더블유 | Cavity filter and connecting structure included therein |
| JP7245852B2 (en) | 2018-06-12 | 2023-03-24 | ケーエムダブリュ・インコーポレーテッド | Cavity filter and connecting structure contained therein |
| KR102241461B1 (en) * | 2018-06-12 | 2021-04-19 | 주식회사 케이엠더블유 | Cavity filter |
| WO2019240489A1 (en) * | 2018-06-12 | 2019-12-19 | 주식회사 케이엠더블유 | Cavity filter and connecting structure included therein |
| WO2019240490A1 (en) * | 2018-06-12 | 2019-12-19 | 주식회사 케이엠더블유 | Cavity filter and connecting structure included therein |
| KR102628218B1 (en) * | 2020-08-28 | 2024-01-24 | 주식회사 케이엠더블유 | Cavity filter for antenna |
| EP4231440A1 (en) * | 2020-10-14 | 2023-08-23 | KMW Inc. | Cavity filter assembly |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1498444A (en) * | 2002-02-13 | 2004-05-19 | 株式会社村田制作所 | Screw fixing device |
| CN1574627A (en) * | 2003-05-21 | 2005-02-02 | Kmw公司 | Radio frequency filter |
| CN1965440A (en) * | 2005-01-07 | 2007-05-16 | 株式会社村田制作所 | Semi-coaxial cavity resonator, filter using the same, and communication apparatus using the same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09214217A (en) * | 1996-01-30 | 1997-08-15 | Ngk Spark Plug Co Ltd | Dielectric resonator |
| JPH09223907A (en) * | 1996-02-19 | 1997-08-26 | Ngk Spark Plug Co Ltd | Dielectric resonator |
| KR100313717B1 (en) * | 1999-09-13 | 2001-11-15 | 최춘권 | Band Pass Filter of Dielectric Resonator Type Having Symmetrically Upper and Lower Notch Points |
| KR100561694B1 (en) * | 2002-12-27 | 2006-03-15 | 주식회사 케이엠더블유 | Radio frequency filter with dielectric part having high dielectric constant and high quality factorq |
-
2008
- 2008-06-27 KR KR1020080061528A patent/KR101036127B1/en not_active IP Right Cessation
-
2009
- 2009-06-18 WO PCT/KR2009/003257 patent/WO2009157672A2/en active Application Filing
- 2009-06-18 CN CN2009801246171A patent/CN102077411A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1498444A (en) * | 2002-02-13 | 2004-05-19 | 株式会社村田制作所 | Screw fixing device |
| CN1574627A (en) * | 2003-05-21 | 2005-02-02 | Kmw公司 | Radio frequency filter |
| CN1965440A (en) * | 2005-01-07 | 2007-05-16 | 株式会社村田制作所 | Semi-coaxial cavity resonator, filter using the same, and communication apparatus using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009157672A3 (en) | 2010-04-22 |
| KR101036127B1 (en) | 2011-05-23 |
| WO2009157672A2 (en) | 2009-12-30 |
| KR20100001571A (en) | 2010-01-06 |
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Application publication date: 20110525 |