CN104538715A - Segment filter - Google Patents
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- CN104538715A CN104538715A CN201410798360.0A CN201410798360A CN104538715A CN 104538715 A CN104538715 A CN 104538715A CN 201410798360 A CN201410798360 A CN 201410798360A CN 104538715 A CN104538715 A CN 104538715A
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Abstract
The invention discloses a segment filter and belongs to the microwave communication field. The segment filter mainly solves the problem that the processing cost of ultra-narrow band filters in the prior art is high. The segment filter comprises at least three metal pipe sections, at least two coupling diaphragms and two input-output structures. Each metal pipe section and the coupling diaphragms or the input-output structures at two ends constitute a resonant cavity. Each coupling diaphragm enables the resonant cavities located at the two ends of the corresponding coupling diaphragm to be communicated. The cross sectional shapes of the three metal pipe sections are identical, and the metal pipe sections are each formed by processing the same indium steel waveguide pipe through linear cutting. The segment filter is simple in structure and can be processed and welded through linear cutting, the milling processing difficulty of hard steel materials such as indium steel and material waste caused by the milling processing difficulty are avoided, and the segment filter is mainly used in an ultra-narrow band microwave communication system and other systems with relative bandwidth smaller than 1%.
Description
Technical field
The present invention relates to a kind of filter, specifically, relate to the super narrow band filter that a kind of relative bandwidth is less than 1%.
Background technology
Microwave filter is an extremely important part in many modern microwaves, millimeter-wave systems, and the quality of its performance often directly affects the performance of whole system.Due to the growing tension of radio-communication frequencies resource, the operating frequency of various types of communication system is by the even millimeter wave development of the microwave to higher frequency.In order to utilize frequency spectrum resource better, various communication frequency requires narrow.This has just expedited the emergence of ultra-narrow bandwidth filter technology.The relative bandwidth of microwave filter will run into two problems when being less than 1%.One is that filter passband Insertion Loss sharply raises, but the frequency drift caused due to variation of ambient temperature is that filter is ineffective.The way that microwave circle is dealt with problems is the Q value adopting bimodulus resonant cavity to improve resonant cavity, adopts the low material of indium steel equitemperature coefficient to reduce ambient temperature to the impact of filter passband frequency simultaneously.This method will cause using and processing of valuable high-strength material, must cause the sharply rising of the cost of device.
Summary of the invention
The object of the present invention is to provide a kind of section of jurisdiction filter, overcome problems of the prior art, greatly reduce the cost of ultra-narrow band microwave filter.
To achieve these goals, the technical solution used in the present invention is: section of jurisdiction filter, it comprises at least 3 joint metal tubes, at least 2 coupling iris, 2 input/output structures, coupling iris is between two joint adjacent metal pipes, coupling iris is connected to the port of metal tube, the general structure that all metal tubes and coupling iris are formed is called periosteum main body, and 2 input/output structures are separately positioned on high order end and the low order end of periosteum main body; Coupling iris has one or several coupling throughhole, the bore of this coupling throughhole is less than the bore of metal tube, adjacent metal pipe is interconnected by coupling throughhole, there are a straight line or curve to pass the cavity region of all coupling throughhole and metal tube, in described joint metal tube, have at least the shape of cross section of 3 joint metal tubes identical.
For the ease of Mounting frequency tuning screw on metal tube and coupling adjustment screw, simultaneously in order to save material, we make metal tube thickness thicker than other place at mounting screw place.For this reason, the wall thickness of at least one joint metal tube changes in cross-sectional direction, wherein maximum ga(u)ge larger than minimum thickness more than 50%.
The coupling iris at metal tube and its two ends forms a resonant cavity, the input/output structure of metal tube and its one end and also form resonant cavity with the coupling iris of its other end, described resonant cavity is rectangular cavity, wherein has at least the mode of operation of 2 resonant cavitys to be the higher mode of this resonant cavity.
The mode of operation of the rectangular cavity of higher mode is TE102 pattern; Or the rectangular cavity of higher mode is the rectangular bimodule resonant cavity of higher mode, and its mode of operation is TE102 and TE301 pattern.
Described periosteum main body forms a mirror symmetrical structure relative to the vertical plane of symmetry crossing its longitudinal axis; The bottom of described metal tube or top are provided with at least 2 metal columns; In all metal columns in a certain metal tube, have at least 2 metal columns identical along the lengthwise position of periosteum main body axis, the lateral separation of central axis on the direction of the vertical plane of symmetry perpendicular to periosteum main body of these two metal columns is 0.5 ~ 0.75 times of the width of metal tube.
Described metal tube is indium steel metal tube, or is thermal coefficient of expansion lower than the metal tube of every degree Celsius 5/1000000ths.
Described metal tube, or/and coupling iris is or/and input/output structure surface is provided with silver coating, is welded by the eutectic welding bed of material between metal tube with coupling iris.The fusing point of this eutectic welding bed of material is less than or equal to 250 degrees Celsius.Input/output structure can adopt common metal, such as alloy aluminum or brass.During the material adopting the thermal coefficient of expansions such as indium steel very low when metal tube, the dislocation caused in order to avoid two kinds of thermal expansion metal coefficient differences and fracture, do not weld between metal tube with input/output structure.
Also comprise stiffener, be connected by attachment screw between this stiffener with 2 input/output structures.
Coupling iris can arrange coupling adjustment screw, also coupling adjustment screw can not be set.And the condition arranging coupling adjustment screw to see whether the thickness of coupling iris can bearing coupled adjustment screw.And be need to arrange coupling adjustment screw in this configuration.How arranging coupling adjustment screw is a key of the present invention.Conventional setting directly coupling adjustment screw is arranged on coupling iris.But in order to reduce the use amount of indium steel, particularly avoid the difficulty existed the processing of the hard materials such as indium steel.Therefore coupling iris of the present invention needs to accomplish very little thickness.Therefore, key of the present invention is the position how arranging coupling adjustment screw.For this reason, present invention employs the means of following 2 kinds of realization coupling adjustment screw: when the thickness of coupling iris is greater than 2.5 millimeters, have at least a joint coupling iris to be provided with coupling adjustment screw, coupling adjustment screw extends in coupling throughhole.2.5 millimeters are less than or equal to when having the thickness of a coupling iris in described coupling iris at least.Have adjustment screw that a coupling iris is not coupled in described coupling iris at least, and adjacent with this coupling iris 2 save in metal tube, have at least on a joint metal tube and are provided with coupling adjustment screw.The coupling throughhole of this coupling adjustment screw as far as possible on this metallic membrane.At this moment, the axis of this coupling adjustment screw and the outer wall joining of this metal tube apart from the distance of this metallic membrane be less than this metal tube along 15% of periosteum main body axis direction length.
Input/output structure is the sheet metal of perforate, and two maximum opposite face is a part for parallel plane.
Generally speaking: section of jurisdiction filter, at least 3 joint metal tubes are comprised, at least 2 coupling iris, 2 input/output structures.Each joint metal tube and the coupling iris at two ends form resonant cavity or metal tube and input/output structure and coupling iris and form resonant cavity.The resonant cavity being positioned at its two ends is communicated with by every a slice coupling iris.The setting of said structure is to save cost, avoid the waste of material adopting the precious materials such as milling processing indium steel to cause, avoid adopting CNC milling machine to process the difficulty that such high-strength material runs into, the metal pipe material (such as standard waveguide) that the present invention adopts shape of cross section identical forms metal tube by Linear cut simultaneously.
The coupling iris at metal tube and its two ends forms a resonant cavity, the input/output structure of metal tube and its one end and also form resonant cavity with the coupling iris of its other end, described resonant cavity is rectangular cavity, wherein has at least the mode of operation of 2 resonant cavitys to be the higher mode of this resonant cavity.In order to improve the Q value of resonant cavity, reduce the insertion loss of filter, described resonant cavity is rectangular cavity, and wherein has at least the mode of operation of 2 resonant cavitys to be the higher mode of this resonant cavity, its preferably mode of operation be TE102 pattern.The employing of this pattern, according to the operating frequency of this section of jurisdiction filter, can select the standard waveguide of suitable model (it is highly the half or less of its width) form resonant cavity and ensure that this resonant cavity has higher Q value.
In order to utilize bimodulus resonant cavity to form section of jurisdiction filter, described resonant cavity is rectangular bimodule resonant cavity, and its mode of operation is TE102 and TE301 pattern.
In order to make the width of the different resonant cavitys of formation rectangle section of jurisdiction filter with highly identical, we arrange metal column in metal tube, and make when adopting the metal tube of same cross sectional dimensions, the operating frequency of the TE301 pattern of different resonant cavity is identical.At this moment, described periosteum main body forms a mirror symmetrical structure relative to the vertical plane of symmetry crossing its longitudinal axis.The section of jurisdiction filter that further periosteum main body and input/output structure are formed forms a mirror symmetrical structure relative to the vertical plane of symmetry crossing its longitudinal axis.The bottom of described metal tube or top are provided with at least 2 metal columns.In all metal columns in a certain metal tube, have at least two metal columns identical along the lengthwise position of this periosteum main body axis.The lateral separation of central axis on the direction of the vertical plane of symmetry perpendicular to this periosteum main body of these two metal columns is 0.5 ~ 0.75 times of the width of this metal tube.Namely, three electric fields these two metal columns being placed in the pattern of the TE301 of this rectangular bimodule resonant cavity concentrate two electric fields of the close resonant cavity outer wall at place to concentrate place.On the upper wall that this metal column can be fixed on metal tube by nut or lower wall.
In order to reduce the change of the resonance frequency of the resonant cavity that ambient temperature causes, the material of described metal tube is indium steel (INVAR), or is thermal coefficient of expansion lower than the material of every degree Celsius 5/1000000ths.
The material of described coupling iris can be indium steel (INVAR), or is thermal coefficient of expansion lower than the material of every degree Celsius 5/1000000ths.When described coupling iris is very thin, also common material can be adopted, such as alloy aluminum or brass.Welding Problems between the metal material of different heat expansion coefficient is eased due to described very thin coupling iris.
In order to improve the Q value of resonant cavity further, described metal tube, or/and coupling iris electroplate, between metal tube and coupling piece, also has the eutectic welding bed of material.The fusing point of this eutectic welding bed of material is lower than 250 degrees Celsius.Whole section of jurisdiction filter completes finally by high-temperature heating.
In order to strengthen the intensity of section of jurisdiction filter, being also provided with stiffener, being connected by attachment screw between this stiffener with input/output structure.
In order to save processing cost further, described coupling iris is or/and input/output structure can become the sheet metal of perforate by linear cutter with sheet metal, and two maximum opposite face is a part for parallel plane.
In order to reduce manufacturing cost further, described coupling iris can be set to ordinary metallic material, such as alloy aluminum or brass.In order to reduce the impact of ambient temperature on the degree of coupling between resonant cavity, consider the damage that the weld of the material that thermal coefficient of expansion is different may be subject to when variations in temperature, the thickness of the coupling iris that the present invention adopts is less than 2.5 millimeters simultaneously.Preferably situation, the thickness of this coupling iris can be 0.1 millimeter.
At this moment, coupling iris is settled the conventional approach of coupling adjustment screw 7 will be difficult to realize.The present invention selects coupling adjustment screw to be arranged on the surface of the metal tube contiguous with this coupling iris, and the coupling aperture as far as possible on this coupling iris.Therefore, being designed to of coupling screws, when coupling iris is very thin, has at least in described coupling iris on a coupling iris and does not arrange any tuning screw, and at least one joint metal tube adjacent with this coupling iris is provided with the adjustment screw that is coupled.The axis of this coupling adjustment screw and the outer wall joining of this metal tube apart from the distance of this metallic membrane be less than this metal tube along 15% of this periosteum main body longitudinal direction length.Preferably scheme, this coupling tuning screw near the coupling throughhole of coupling iris, but will avoid the breakage causing metal tube surface.
Reduce the final step of manufacturing cost, input/output structure adopts common metal, such as alloy aluminum or brass.During the material adopting the thermal coefficient of expansions such as indium steel very low when metal tube, the dislocation caused in order to avoid two kinds of thermal expansion metal coefficient differences and fracture, do not weld between metal tube with input/output structure.
The present invention is by each primary structure modularization in filter, the very low metal pipe material of indium steel equitemperature coefficient and sheet metal is adopted to be formed by linear cutter, when efficiently avoid the hard metal derbies such as the employing indium steel in conventional design, need the difficulty existed hard intermetallic composite coating by milling, avoid the waste of material simultaneously, greatly can reduce the manufacturing cost of device.
Accompanying drawing explanation
Fig. 1 is the cross-sectional schematic at vertical symmetry plane place of the present invention, and Fig. 1 is also the schematic diagram of embodiment 1 simultaneously.
Fig. 2 is metal tube schematic diagram.
Fig. 3 is coupling iris schematic diagram.
Fig. 4 is metal column schematic diagram.
Fig. 5 is the schematic top plan view of embodiment 2.
Fig. 6 is the schematic top plan view of embodiment 3.
The corresponding title of attached number in the figure: 1-metal tube, 2-coupling iris, 3-input/output structure, the 4-eutectic welding bed of material, 5-metal column, 6-frequency tuning screw, 7-is coupled adjustment screw, 8-stiffener, 9-attachment screw.
In this specification, part noun provides as follows:
Periosteum main body is longitudinally: i.e. the axis direction of certain metal tube, namely with the direction of this metal tube cross-section normal.Width: the broadside of this metal tube cross section.Short transverse: the narrow edge direction of this metal tube cross section.
Embodiment
embodiment 1
Principle design structure is: section of jurisdiction filter, it comprises at least 3 joint metal tube 1, at least 2 coupling iris 2,2 input/output structures 3, coupling iris 2 is between two joint adjacent metal pipes, coupling iris 2 is connected to the port of metal tube, the general structure that all metal tubes 1 and coupling iris 2 are formed is called periosteum main body, and 2 input/output structures 3 are separately positioned on high order end and the low order end of periosteum main body; Coupling iris 2 has a coupling throughhole, the bore of this coupling throughhole is less than the bore of metal tube 1, adjacent metal pipe 1 is interconnected by coupling throughhole, there are a straight line or curve to pass the cavity region of all coupling throughhole and metal tube, in described joint metal tube 1, have at least the shape of cross section of 3 joint metal tubes 1 identical.Metal tube 1 forms a resonant cavity with the coupling iris at its two ends, the input/output structure of metal tube 1 and its one end and also form resonant cavity with the coupling iris of its other end.
The wall thickness of described metal tube up larger than other direction more than 50%.
Described resonant cavity is rectangular cavity, wherein has at least the mode of operation of 2 resonant cavitys to be the higher mode of this resonant cavity.The mode of operation of the rectangular cavity of higher mode is TE102 pattern; Or the rectangular cavity of higher mode is the rectangular bimodule resonant cavity of higher mode, and its mode of operation is TE102 and TE301 pattern.Described periosteum main body forms a mirror symmetrical structure relative to the vertical plane of symmetry crossing its longitudinal axis; The bottom of described metal tube or top are provided with at least 2 metal columns 5; In all metal columns 5 in a certain metal tube, have at least 2 metal columns 5 identical along the lengthwise position of periosteum main body axis, the lateral separation of central axis on the direction of the vertical plane of symmetry perpendicular to periosteum main body of these two metal columns 5 is 0.5 ~ 0.75 times of the width of metal tube.Described metal tube 1 is indium steel metal tube, or is thermal coefficient of expansion lower than the metal tube of every degree Celsius 5/1000000ths.Described metal tube 1, or/and coupling iris 2 is or/and input/output structure 3 surface is provided with silver coating, is welded by the eutectic welding bed of material 4 between metal tube 1 with coupling iris 2, is also welded by the eutectic welding bed of material 4 between metal tube 1 with input/output structure 3; The fusing point of this eutectic welding bed of material 4 is less than or equal to 250 degrees Celsius.Also comprise stiffener 8, be connected by attachment screw 9 between this stiffener 8 with 2 input/output structures 3.Coupling iris 2 can be arranged coupling adjustment screw 7, coupling adjustment screw 7 also can not be set, and the condition arranging coupling adjustment screw 7 to see whether the thickness of coupling iris 2 can bearing coupled adjustment screw 7.And be need to arrange coupling adjustment screw 7 in this configuration, how arranging coupling adjustment screw 7 is keys of the present invention, conventional setting is directly arranged on coupling iris by coupling adjustment screw 7, but in order to reduce structural volume, therefore coupling iris 2 of the present invention needs to accomplish very little thickness, therefore, key of the present invention is the position how arranging coupling adjustment screw 7, for this reason, present invention employs the means of following 2 kinds of realization coupling adjustment screw 7: when the thickness of coupling iris 2 is greater than 2.5 millimeters, a joint coupling iris 2 is had at least to be provided with coupling adjustment screw 7, coupling adjustment screw 7 extends in coupling throughhole.When having at least the thickness of a coupling iris 2 to be less than or equal to 2.5 millimeters in described coupling iris 2.Adjustment screw that a coupling iris 2 is not coupled is had at least in described coupling iris 2, and adjacent with this coupling iris 22 save in metal tube 1, have at least and a joint metal tube 1 be provided with coupling adjustment screw 7, the axis of this coupling adjustment screw 7 and the outer wall joining of this metal tube 1 apart from the distance of this metallic membrane 2 be less than this metal tube 1 along 15% of periosteum main body axis direction length.
In the present embodiment, concrete enforcement structure is:
As shown in Figures 1 to 4, section of jurisdiction filter, comprises 4 joint metal tube, 1,3 coupling iris, 2,2 input/output structures 3.Joint metal tube 1 and the coupling iris 2 at two ends form resonant cavity or metal tube 1 forms resonant cavity with input/output structure 3, coupling iris 2.The resonant cavity being positioned at its two ends is communicated with by every a slice coupling iris 2.The metal pipe material that the present invention adopts shape of cross section identical such as standard waveguide forms metal tube 1 by Linear cut.
Described resonant cavity is rectangular cavity, and the mode of operation of wherein 4 resonant cavitys is the higher mode of this resonant cavity, and its mode of operation is TE102 pattern.
The material of described metal tube 1 is indium steel (INVAR).The material of described coupling iris 2 is indium steel INVAR or common alloy aluminum.The latter can cause the further decline of manufacturing cost, but may sacrifice the reliability of device when variation of ambient temperature.
Described metal tube 1, coupling iris 2, input/output structure 3 surface is all silver-plated.Between metal tube 1 and coupling piece 2, between metal tube 1 and input/output structure 3, also has eutectic welding scolding tin.Whole section of jurisdiction filter finally by high-temperature heating by eutectic welding tin welding together.
Also be provided with stiffener 8, be connected by attachment screw 9 between this stiffener 8 with input/output structure 3.
Described coupling iris 2, or/and input/output structure 3 all becomes the sheet metal of perforate by linear cutter with sheet metal, two maximum opposite face is a part for parallel plane.
For the ease of compensating processing and design error, each metal tube 1 adds two frequency tuning screws 6, and class one coupling adjustment screw 7 is set on each coupling iris 2.
embodiment 2
As shown in Figure 5, embodiment 2 is only with the difference of embodiment 1, and described resonant cavity is rectangular bimodule resonant cavity, and its mode of operation is TE102 and TE301 pattern.
Meanwhile, in each joint metal tube 1, be provided with 2 metal columns 5, make when adopting the metal tube 1 of same cross sectional dimensions, the operating frequency of the TE301 pattern of different resonant cavity is identical.At this moment, described periosteum main body forms a mirror symmetrical structure relative to the vertical plane of symmetry crossing its longitudinal axis, and further, described section of jurisdiction filter forms a mirror symmetrical structure relative to the vertical plane of symmetry crossing its longitudinal axis.The bottom of described metal tube is provided with 2 metal columns 5.These 2 metal columns 5 are identical along the lengthwise position of this periosteum main body axis.The lateral separation of central axis on the direction of the vertical plane of symmetry perpendicular to this periosteum main body of these two metal columns 5 is 0.67 times of the width of this metal tube.Namely, three electric fields these two metal columns 5 being placed in the pattern of the TE301 of this rectangular bimodule resonant cavity concentrate two electric fields of the close resonant cavity outer wall at place to concentrate place.This metal column 5 is fixed on the lower wall of resonant cavity by nut.
Often save metal tube 1 upper surface on be provided with 4 frequency tuning screws 6.
embodiment 3
As shown in Figure 6, embodiment 2 is only with the difference of embodiment 1, and coupling iris 2 is very thin, therefore cannot arrange coupling adjustment screw 7 in the above.At this moment, upper surface of metal tube described in each, the opening part near contiguous coupling iris 2 is provided with coupling adjustment screw 7.The structure that the impact of employing on the resonance frequency of resonant cavity 3 of this coupling adjustment screw is little, is mainly used in regulating the coupling between adjacent resonators.Select very thin coupling iris 2, be conducive to the manufacturing cost reducing device further.
Meanwhile, often save metal tube 1 upper surface on be provided with 2 frequency tuning screws 6.
As above then better the present invention can be realized.
Claims (10)
1. section of jurisdiction filter, it is characterized in that: comprise at least 3 joints metal tube (1), at least 2 coupling iris (2), 2 input/output structures (3), coupling iris (2) is between two joint adjacent metal pipes, coupling iris (2) is connected to the port of metal tube, the general structure that all metal tubes (1) and coupling iris (2) are formed is called periosteum main body, and 2 input/output structures (3) are separately positioned on high order end and the low order end of periosteum main body; Coupling iris (2) has one or several coupling throughhole, the bore of this coupling throughhole is less than the bore of metal tube (1), adjacent metal pipe (1) is interconnected by coupling throughhole, there are a straight line or curve to pass the cavity region of all coupling throughhole and metal tube, in described joint metal tube (1), have at least the shape of cross section of 3 joint metal tubes (1) identical.
2. section of jurisdiction according to claim 1 filter, is characterized in that, has at least the thickness of a coupling iris (2) to be less than or equal to 2.5 millimeters in described coupling iris (2); Any tuning screw of adjustment screw that a coupling iris (2) is not coupled is had at least in described coupling iris (2), and adjacent with this coupling iris (2) 2 save in metal tube (1), have at least and a joint metal tube (1) be provided with coupling adjustment screw (7), the axis of this coupling adjustment screw (7) and the outer wall joining of this metal tube (1) apart from the distance of this metallic membrane (2) be less than this metal tube (1) along 15% of this section of jurisdiction filter axis direction length of periosteum main body.
3. section of jurisdiction according to claim 1 filter, is characterized in that, the wall thickness of at least one joint metal tube (1) changes in cross-sectional direction, wherein maximum ga(u)ge larger than minimum thickness more than 50%.
4. section of jurisdiction according to claim 1 filter, it is characterized in that, metal tube (1) forms a resonant cavity with the coupling iris at its two ends, the input/output structure of metal tube (1) and its one end and also form resonant cavity with the coupling iris of its other end, described resonant cavity is rectangular cavity, wherein has at least the mode of operation of 2 resonant cavitys to be the higher mode of this resonant cavity.
5. section of jurisdiction according to claim 4 filter, is characterized in that, the mode of operation of the rectangular cavity of higher mode is TE102 pattern; Or the rectangular cavity of higher mode is the rectangular bimodule resonant cavity of higher mode, and its mode of operation is TE102 and TE301 pattern.
6. section of jurisdiction according to claim 5 filter, is characterized in that, described periosteum main body forms a mirror symmetrical structure relative to the vertical plane of symmetry crossing described a certain metal tube (1) longitudinal axis; The bottom of a joint metal tube (1) or top is had at least to be provided with at least 2 metal columns (5) in all metal tubes (1); Be provided with in bottom or top in all metal columns (5) in a certain metal tube (1) of metal column (5), have 2 metal columns (5) at least identical along the lengthwise position on periosteum main body axis direction; The lateral separation of central axis on the direction of the vertical plane of symmetry perpendicular to periosteum main body of these two metal columns (5) is 0.5 ~ 0.75 times of the width of metal tube (1).
7. section of jurisdiction as claimed in any of claims 1 to 6 filter, is characterized in that, described metal tube (1) is indium steel metal tube, or is thermal coefficient of expansion lower than the metal tube of every degree Celsius 5/1000000ths.
8. section of jurisdiction as claimed in any of claims 1 to 6 filter, it is characterized in that, described metal tube (1) is or/and coupling iris (2) surface is provided with silver coating, welded by the eutectic welding bed of material (4) between metal tube (1) with coupling iris (2), do not weld between metal tube (1) with input/output structure (3); The fusing point of this eutectic welding bed of material (4) is less than or equal to 250 degrees Celsius.
9. section of jurisdiction as claimed in any of claims 1 to 6 filter, is characterized in that, also comprises stiffener 8, is connected between this stiffener (8) with 2 input/output structures (3) by attachment screw (9).
10. section of jurisdiction as claimed in any of claims 1 to 6 filter, is characterized in that, have at least a joint coupling iris (2) to be provided with coupling adjustment screw (7), coupling adjustment screw (7) extends in coupling throughhole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410798360.0A CN104538715A (en) | 2014-12-22 | 2014-12-22 | Segment filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410798360.0A CN104538715A (en) | 2014-12-22 | 2014-12-22 | Segment filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104538715A true CN104538715A (en) | 2015-04-22 |
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ID=52854208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410798360.0A Pending CN104538715A (en) | 2014-12-22 | 2014-12-22 | Segment filter |
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| CN (1) | CN104538715A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337006A (en) * | 2015-10-22 | 2016-02-17 | 南京灏众通信技术有限公司 | Temperature compensation type invar dual-mode filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4724408A (en) * | 1985-08-27 | 1988-02-09 | Alps Electric Co., Ltd. | Waveguide filter |
| CN201017975Y (en) * | 2007-03-09 | 2008-02-06 | 成都赛纳赛德科技有限公司 | Compact waveguide filter |
| CN101719577A (en) * | 2009-12-25 | 2010-06-02 | 成都赛纳赛德科技有限公司 | Broadband dual-mode filter |
| CN103746158A (en) * | 2014-01-26 | 2014-04-23 | 成都赛纳赛德科技有限公司 | Waveguide multiplexer |
| CN204481101U (en) * | 2014-12-22 | 2015-07-15 | 成都赛纳赛德科技有限公司 | Section of jurisdiction filter |
-
2014
- 2014-12-22 CN CN201410798360.0A patent/CN104538715A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4724408A (en) * | 1985-08-27 | 1988-02-09 | Alps Electric Co., Ltd. | Waveguide filter |
| CN201017975Y (en) * | 2007-03-09 | 2008-02-06 | 成都赛纳赛德科技有限公司 | Compact waveguide filter |
| CN101719577A (en) * | 2009-12-25 | 2010-06-02 | 成都赛纳赛德科技有限公司 | Broadband dual-mode filter |
| CN103746158A (en) * | 2014-01-26 | 2014-04-23 | 成都赛纳赛德科技有限公司 | Waveguide multiplexer |
| CN204481101U (en) * | 2014-12-22 | 2015-07-15 | 成都赛纳赛德科技有限公司 | Section of jurisdiction filter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337006A (en) * | 2015-10-22 | 2016-02-17 | 南京灏众通信技术有限公司 | Temperature compensation type invar dual-mode filter |
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Application publication date: 20150422 |