CN109103556A - Waveguide filter and its manufacturing method - Google Patents
Waveguide filter and its manufacturing method Download PDFInfo
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- CN109103556A CN109103556A CN201811002420.8A CN201811002420A CN109103556A CN 109103556 A CN109103556 A CN 109103556A CN 201811002420 A CN201811002420 A CN 201811002420A CN 109103556 A CN109103556 A CN 109103556A
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- waveguide
- narrow side
- rectangular
- rectangular aperture
- ring flange
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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
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
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- 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
- H01P11/001—Manufacturing waveguides or transmission lines of the waveguide type
- H01P11/002—Manufacturing hollow waveguides
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- Manufacturing & Machinery (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a kind of waveguide filters, are related to wireless communication technology field.It include first wave guide ring flange, second waveguide ring flange and rectangular aperture waveguide in the waveguide filter structure.It is provided with rectangular channel in rectangular aperture waveguide sidewalls, metal plating is carried out to the structure interior surface of waveguide filter during easy to process, while helping to mitigate the quality of waveguide filter.The invention also discloses a kind of waveguide filter manufacturing methods.Waveguide filter structure is integrally printed using nonmetallic materials by stereolithography 3-D printer, and the plating of quantitative thicknesses of metal is realized in the whole surfaces externally and internally of waveguide filter, while realizing accurate processing and without assembly, small lot may be implemented quickly to produce, effectively improve manufacture efficiency.
Description
Technical field
The present invention relates to wireless communication technology field more particularly to a kind of waveguide filter and its manufacturing methods.
Background technique
With the development of wireless communication technique, modern advanced wireless electrical communication system needs the multi-functional microwave milli of high-performance
Metric wave device is to adapt to electromagnetic environment complicated and changeable.In these radio communications systems especially radio-frequency front-end receive-transmit system
In, traditional microwave and millimeter wave passive wave guide device, such as waveguide filter etc. has radio-frequency enabled diversification, radio frequency loss
The advantages such as low and power capacity is big, are one of the emphasis of researcher's concern.
Under normal circumstances, the waveguide device of radio-frequency enabled complexity often has complicated three dimensional physical structure, using tradition
It when mechanical processing technique manufactures these devices, needs a structure integrally splitting into multiple components, then by multiple components point
It is not processed, is finally ressembled again together.
In the technology of above-mentioned relative maturity, the rigging error that assembling process introduces will influence waveguide device to a certain extent
Performance, and need using a large amount of assembly fastener, such as screw and pin.In addition, wave guide made of traditional all-metal
Part weight is big, and redundancy structure material is more, is unfavorable for realizing communication system in many applications such as airborne, carrier-borne and aerospace
Miniaturization and lightness.
Summary of the invention
The main purpose of the present invention is to provide a kind of waveguide filter and its manufacturing methods, it is intended to solve tradition and subtract material system
When making in technology using mechanical processing technique manufacture waveguide filter, the manufacturing and positioning errors of waveguide filter are big, wave guide
Part weight is big and redundancy structure material more than technical problem.
To achieve the above object, first aspect of the embodiment of the present invention provides a kind of waveguide filter, the waveguide filter packet
It includes:
First wave guide ring flange, second waveguide ring flange and rectangular aperture waveguide；
A perforative rectangular channel, the rectangular aperture are provided on two broadside wall middle lines of the rectangular aperture waveguide
It is provided with multiple rectangular channels on two narrow side walls of waveguide, includes multiple groups electricity on two narrow side walls inside the rectangular aperture waveguide
The inside division of the rectangular aperture waveguide is multiple resonant cavities by inductive iris, the multiple groups inductive iris；
The left end of the rectangular aperture waveguide is connect with the first wave guide ring flange, the right end of the rectangular aperture waveguide
It is connect with the second waveguide ring flange.
Second aspect of the embodiment of the present invention provides a kind of waveguide filter manufacturing method, this method comprises:
The electronic model that waveguide filter is put according to predetermined angle, using stereolithography 3-D printer using nonmetallic
Material prints the original workpiece of the filter according to the electronic model of the waveguide filter, wherein the original workpiece
It include: first wave guide ring flange, second waveguide ring flange and rectangular aperture waveguide, the original workpiece, which is one, can not be split
It is whole；
Solidify the original workpiece using ultraviolet light, and the original workpiece after solidification is placed in air blast electric dry oven
It is heat-treated, obtains the physical model of 3-D printing；
Surface metalation is carried out on the surface of the physical model of 3-D printing, obtains waveguide filter.
The embodiment of the present invention provides a kind of waveguide filter and its manufacturing method.Waveguide filter includes first wave guide flange
Disk, second waveguide ring flange and rectangular aperture waveguide.Rectangular channel is provided in rectangular aperture waveguide sidewalls, it is right during easy to process
Structure interior surface carries out metal plating, while helping to mitigate the quality of waveguide filter.Waveguide filter structure uses non-gold
Belong to material integrally to print by stereolithography 3-D printer, and realizes and determine in the whole surfaces externally and internally of waveguide filter
The plating for measuring thicknesses of metal may be implemented small lot and quickly produce, effectively while realizing accurate processing and without assembly
Ground improves manufacture efficiency.
Detailed description of the invention
It in order to illustrate the embodiments of the present invention more clearly or prior art, below will be to embodiment or prior art side
Attached drawing used in case is briefly described.It should be noted that the accompanying drawings in the following description is only some realities of the invention
Example is applied, to those skilled in the art, without creative efforts, can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is a kind of inclined shaft mapping of waveguide filter provided in an embodiment of the present invention；
Fig. 2 is a kind of cross-sectional view of waveguide filter provided in an embodiment of the present invention；
Fig. 3 is a kind of another cross-sectional view of waveguide filter provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of the waveguide flange of waveguide filter provided in an embodiment of the present invention；
Fig. 5 is a kind of flow diagram of waveguide filter manufacturing method provided in an embodiment of the present invention；
Fig. 6 is that a kind of waveguide filter provided in an embodiment of the present invention emulates and the scattering parameter of measurement song in Ka full frequency band
Line chart；
Fig. 7 be a kind of waveguide filter provided in an embodiment of the present invention the multiple samples emulation of Ka full frequency band different batches with
The passband scattering parameter curve graph of measurement.
Specific embodiment
To enable objects, features and advantages of the present invention more obvious and easy to understand, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention carry out complete display describe.It should be noted that described real
Applying example is only a part of the embodiment of the present invention, and not all embodiments.Based on the embodiments of the present invention, those skilled in the art
Member's all other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the embodiment of the present invention, it is to be understood that term " upper surface ", " lower surface ", " left end ", " right side
The orientation or positional relationship of the instructions such as end ", " upside ", " downside ", " horizontal direction " and " vertical direction " is based on attached drawing institutes
The orientation or positional relationship shown is merely for convenience of the description embodiment of the present invention and simplifies description, and cannot regard as meaning
The element or device shown is specific orientation.
In the description of the embodiment of the present invention, given structure size is that preferred parameter is repaired referring to the embodiment of the present invention
The dimensional parameters for changing all parts can further obtain actually required performance.
Referring to Fig. 1, Fig. 1 is a kind of inclined shaft mapping of waveguide filter provided in an embodiment of the present invention.
As shown in Figure 1, waveguide filter includes:
First wave guide ring flange 1, second waveguide ring flange 2 and rectangular aperture waveguide 3.
Wherein, flange is part interconnected between waveguide mouth and waveguide mouth, for the connection between pipe end.And waveguide
Ring flange refers to by the flange that is fixed on waveguide terminal of design, and it is mountable in order to be aligned with companion flange and clamping
Accessory.The size of first wave guide ring flange 1 and second waveguide ring flange 2 in the embodiment of the present invention is WR-28 under Ka frequency range
The section of standard rectangular waveguide flange size, first wave guide ring flange 1 and second waveguide ring flange 2 is rectangle.
Further, in electromagnetism and communication engineering, waveguide refers to the physics that electromagnetic energy is transmitted between its port
Structure, common guided wave structure mainly have parallel double conducting wire, coaxial line, parallel flat waveguide, rectangular waveguide, circular waveguide, micro-strip
Line and slab dielectric optical waveguide etc..From the point of view of conduction electromagnetic wave, above-mentioned waveguiding structure can all be divided into interior zone and outside
Region, electromagnetic wave, which is commonly bundled, is tied to interior zone propagation.In embodiments of the present invention, what is used is guided wave structure for rectangular wave
It leads, the section of rectangular waveguide is rectangle, inside filling air, since the side wall of rectangular waveguide is provided with rectangular aperture, so rectangle
Waveguide is rectangular aperture waveguide 3.
Further, due to the section of rectangular aperture waveguide 3 be rectangle, so in rectangular aperture waveguide 3 air chamber one
There are two broadside and two narrow sides, it is broadside 301 and two that a broadside in two broadsides is identified in Fig. 1 in a section
A narrow side in a narrow side is narrow side 302.Rectangular aperture waveguide 3 is altogether there are six face, the left side of rectangular aperture waveguide 3 and the
The connection of one waveguide flange 1, the right side of rectangular aperture waveguide 3 is connect with second waveguide ring flange 2.Rectangular aperture waveguide 3
Two broadside wall difference: the first broadside wall 311, and the second broadside wall opposite with the first broadside wall 311 (do not show in Fig. 1
Out), two narrow side walls of rectangular aperture waveguide 3 are respectively as follows: the first narrow side wall 321, and opposite with the first narrow side wall second
Narrow side wall (not shown in figure 1).
Further, it is provided with a perforative rectangular channel on 311 middle line of the first broadside wall and the second broadside wall middle line, the
One narrow side wall 321 and the second narrow side wall are provided with multiple rectangular channels to the inside of rectangular aperture waveguide 3 respectively, in rectangular aperture waveguide
It include multiple groups inductive iris on two, portion narrow side wall, the inside division of rectangular aperture waveguide 3 is more by multiple groups inductive iris
A resonant cavity.
Wherein, inductive iris in waveguide filter entity for a size custom design and with waveguide filter cavity one
The material block of body manufacture, it belongs to a part of filter cavity internal structure, and resonant cavity refers to two in rectangular aperture waveguide 3
Cavity area included between inductive iris is organized, each resonant cavity is filled with air in entity, will pass through rectangular aperture wave
It leads 3 electromagnetic wave to be limited in the form of standing wave in the cavity of resonant cavity, and plays storage electromagnetic wave energy and selection electromagnetism
The effect of wave frequency rate.
Further, the purpose that rectangular channel is opened in rectangular aperture waveguide 3 is: the first, to using stereolithography 3-D printer
When the physical model of the waveguide filter of printing carries out surface metal plating, electrostatic field can penetrate opening for rectangular aperture waveguide 3
Groove sidewall enters 3 inner cavity of rectangular aperture waveguide, plates on the metal convenient for 3 inner surface of rectangular aperture waveguide；The second, facilitate rectangle
Foreign-plated plating solution swaps in 3 cavity of gap waveguide, and the bath concentration for reducing 3 different surfaces position of rectangular aperture waveguide is poor
Rate difference is plated on different and metal.Third, the weight for reducing waveguide filter.
Further, the left end of rectangular aperture waveguide 3 is connect with first wave guide ring flange 1, the right end of rectangular aperture waveguide 3
It is connect with second waveguide ring flange 2.
In embodiments of the present invention, waveguide filter includes first wave guide ring flange 1, second waveguide ring flange 2 and rectangle
Gap waveguide 3, due to the of the first broadside wall 311 of rectangular aperture waveguide 3 and the second broadside wall and rectangular aperture waveguide 3
One narrow side wall 321 and the second narrow side wall are provided with rectangular channel, it is easy to process during to the structure interior surface of waveguide filter into
Row metal plating, while helping to mitigate the quality of waveguide filter.
Fig. 2 and Fig. 3 are please referred to, Fig. 2 is a kind of cross-sectional view of waveguide filter provided in an embodiment of the present invention, and Fig. 3 is this
A kind of another cross-sectional view for waveguide filter that inventive embodiments provide.
Wherein, Fig. 2 be along after the waveguide filter A-A ' section in Fig. 1 from the bottom up observation be formed by cross-sectional view,
Fig. 3 is along observation is formed by another cross-sectional view from front to back after the waveguide filter B-B ' section in Fig. 1.Waveguide filter
The first narrow side wall 321 on rectangular channel, the rectangular channel on the second narrow side wall, and, the inductive iris between rectangular channel can
, for different quantity, to be cascaded in embodiments of the present invention with including 5 according to the quantitative design of the resonant cavity of waveguide filter
For five rank Chebyshevs of resonant cavity respond waveguide filter, the composition of waveguide filter is described, remaining quantity resonant cavity
The design of waveguide filter structure is similar with the design of the structure of the waveguide filter of 5 cascade resonators, and details are not described herein again.
As shown in Figures 2 and 3, rectangular aperture waveguide 3 is the rectangular parallelepiped structure of inner hollow, and the electromagnetic wave of input is limited
It is propagated in the interior zone of rectangular aperture waveguide 3, all flutings on 3 side wall of rectangular aperture waveguide do not influence rectangular aperture wave
3 inside electromagnetic wave propagations are led, and do not generate the radiation outside any electromagnetism wave direction rectangular aperture waveguide 3.Rectangular aperture waveguide 3
Sidewall thickness be twall, twallIt is 2.800 millimeters.
Further, it is rectangle that first wave guide ring flange 1, which is provided with section to the second end face on its opposite from first end face,
Waveguide port, electromagnetic wave input or output port, waveguide port and 3 inner hollow of rectangular aperture waveguide as waveguide filter
Partial first port is connected, and the first port of the cross-sectional sizes of waveguide port and 3 interior hollow section of rectangular aperture waveguide
Cross-sectional sizes it is identical, width a, a are 7.112 millimeters, and height b, b are 3.556 millimeters.In rectangular aperture waveguide 3
The width in the first port section of portion's hollow space is 7.112 millimeters, the first port of 3 interior hollow section of rectangular aperture waveguide
The height in section is 3.556 millimeters.
Further, it is rectangle that second waveguide ring flange 2, which is provided with section to the second end face on its opposite from first end face,
Waveguide port, electromagnetic wave input or output port, waveguide port and 3 inner hollow of rectangular aperture waveguide as waveguide filter
Partial second port is connected, and the second port of the cross-sectional sizes of waveguide port and 3 interior hollow section of rectangular aperture waveguide
Cross-sectional sizes it is identical, width a, a are 7.112 millimeters, and height b, b are 3.556 millimeters.In rectangular aperture waveguide 3
The width in the second port section of portion's hollow space is 7.112 millimeters, the second port of 3 interior hollow section of rectangular aperture waveguide
The height in section is 3.556 millimeters.
Further, the rectangular channel on the first narrow side wall 321 is by first wave guide ring flange 1 towards second waveguide ring flange 2
Direction arrangement, the rectangular channel one on the first narrow side wall 321 shares 10, successively are as follows: the first rectangular channel 4, the second rectangular channel 5,
Third rectangular channel 6, the 4th rectangular channel 7, the 5th rectangular channel 8, the 6th rectangular channel 9, the 7th rectangular channel 10, the 8th rectangular channel 11,
Nine rectangular channels 12 and the tenth rectangular channel 13, center of the position of the rectangular channel on the first narrow side wall 321 about waveguide filter
Spool is symmetrical, and symmetrical about waveguide filter integral central.
Rectangular channel on first narrow side wall 321 is towards the inside of rectangular aperture waveguide 3 through the first narrow side wall 321.
Further, the notch of the rectangular channel on the first narrow side wall 321 is rectangle, the rectangle on the first narrow side wall 321
The long side of the notch of slot is parallel with vertical direction, the short side of the notch of the rectangular channel on the first narrow side wall 321 with level side
To parallel, the rectangular channel on the first narrow side wall 321 is inwardly perpendicular to the outer wall of the first narrow side wall 321.
Further, the surface current on the corresponding inner surface of the first narrow side wall 321 is oriented parallel to vertical direction, the surface current
It is that the electromagnetic wave due to propagating in rectangular aperture waveguide 3 incudes generation on 3 inner wall of rectangular aperture waveguide.First narrow side wall
Surface current distribution is not cut and is destroyed in the fluting direction of rectangular channel on 321, therefore will not cause electromagnetic radiation.Due to
The depth of rectangular channel on one narrow side wall 321 and the side wall thickness of rectangular aperture waveguide 3 are identical, so on the first narrow side wall 321
Rectangular channel depth be 2.800 millimeters.
Wherein, the slot of the notch height of the rectangular channel on the first narrow side wall 321 namely the rectangular channel on the first narrow side wall 321
The length of the long side of mouth, it is identical as the height of 3 interior hollow section of rectangular aperture waveguide, then have on the first narrow side wall 321
The notch height of rectangular channel is 3.556 millimeters.
Further, the width of rebate of the rectangular channel on the first narrow side wall 321 namely the rectangular channel on the first narrow side wall 321
Notch short side length can under the premise of compages mechanical strength and filter radio-frequency performance flexible design.At this
The width of rebate of the first rectangular channel 4 is 1.223 millimeters in inventive embodiments, and the width of rebate of the second rectangular channel 5 is 1.223 millis
Rice, the width of rebate of third rectangular channel 6 are 1.467 millimeters, and the width of rebate of the 4th rectangular channel 7 is 1.467 millimeters, the 5th rectangle
The width of rebate of slot 8 is 1.521 millimeters, and the width of rebate of the 6th rectangular channel 9 is 1.521 millimeters, the notch of the 7th rectangular channel 10
Width is 1.467 millimeters, and the width of rebate of the 8th rectangular channel 11 is 1.467 millimeters, and the width of rebate of the 9th rectangular channel 12 is
1.223 millimeters, and, the width of rebate of the tenth rectangular channel 13 is 1.223 millimeters.
Further, the rectangular channel on the rectangular channel and the first narrow side wall 321 on the second narrow side wall, about the first broadside wall
Plane where being parallel to the center line for being parallel to long side on the center line and the second broadside wall of long side on 311 is symmetrical, so second
The quantity of rectangular channel on narrow side wall is also 10, by first wave guide ring flange 1 towards the direction of second waveguide ring flange 2 successively
Arrangement, is respectively as follows: the 11st rectangular channel 14, the 12nd rectangular channel 15, the 13rd rectangular channel 16, the 14th rectangular channel the 17, the tenth
Five rectangular channels 18, the 16th rectangular channel 19, the 17th rectangular channel 20, the 18th rectangular channel 21, the 19th rectangular channel 22 and
20 rectangular channels 23.
Further, the size pair of the size of the rectangular channel on the second narrow side wall and the rectangular channel on the first narrow side wall 321
Answer identical, the notch height of the rectangular channel of the second narrow side wall is identical as the height of 3 interior hollow section of rectangular aperture waveguide, then
The notch height of the rectangular channel of second narrow side wall is 3.556 millimeters.The width of rebate of 11st rectangular channel 14 is 1.223 millis
Rice, the width of rebate of the 12nd rectangular channel 15 are 1.223 millimeters, and the width of rebate of the 13rd rectangular channel 16 is 1.467 millimeters, the
The width of rebate of 14 rectangular channels 17 is 1.467 millimeters, and the width of rebate of the 15th rectangular channel 18 is 1.521 millimeters, the 16th
The width of rebate of rectangular channel 19 is 1.521 millimeters, and the width of rebate of the 17th rectangular channel 20 is 1.467 millimeters, the 18th rectangle
The width of rebate of slot 21 is 1.467 millimeters, and the width of rebate of the 19th rectangular channel 22 is 1.223 millimeters, and, the 20th rectangle
The width of rebate of slot 23 is 1.223 millimeters.
Further, the rectangular channel on the first broadside wall 311 is broadside rectangular channel 24, and broadside rectangular channel 24 is particularly located at the
The center line position of long side is parallel on one broadside wall 311, the rectangular channel on the second broadside wall is particularly located at the second broadside
The center line position of long side is parallel on wall, the specific location of the rectangular channel on the second broadside wall does not mark in figure.
Further, the notch of broadside rectangular channel 24 is rectangle, the long side of the notch of broadside rectangular channel 24 and center line side
To parallel, the short side of the notch of broadside rectangular channel 24 is vertical with centerline direction.The notch long side of broadside rectangular channel 24 is parallel to
Surface current direction on the corresponding waveguide inner surface of first broadside wall 311, the surface current are also by propagating in rectangular aperture waveguide 3
Electromagnetic wave incude on waveguide inner wall and generate, and surface current is oriented parallel to the center line of the first broadside wall 311.Broadside square
The distribution of the surface current on waveguide inner surface is not cut and is destroyed in the fluting direction of shape slot 24, therefore without generating electromagnetic wave energy
Radiation.The notch length of broadside rectangular channel 24 is 43.100 millimeters, and width is 1.400 millimeters.Rectangle on second broadside wall
The location parameter of slot and dimensional parameters and the location parameter of broadside rectangular channel 24 are similar with dimensional parameters, and details are not described herein again.
Further, the first narrow side wall 321 by first wave guide ring flange 1 towards the direction of second waveguide ring flange 2 every
Two rectangular channels design an inductive iris, share 6, successively are as follows: the first inductive iris 25, the second inductive iris
26, third inductive iris 27, the 4th inductive iris 28, the 5th inductive iris 29 and the 6th inductive iris 30, the
The inductive iris designed on the inductive iris and the first narrow side wall 321 designed on two narrow side walls is about the first broadside wall 311
Center line and the second broadside wall center line where plane it is symmetrical, so the inductive iris on the second narrow side wall shares six
It is a, successively are as follows: the 7th inductive iris 31, the 8th inductive iris 32, the 9th inductive iris 33, the tenth inductive iris
34, the 11st inductive iris 35 and the 12nd inductive iris 36.
Further, the quantity of the resonant cavity of waveguide filter is five, and five resonant cavities are concatenated together, respectively the
One resonant cavity 37, the second resonant cavity 38, third resonant cavity 39, the 4th resonant cavity 40 and the 5th resonant cavity 41, adjacent resonance
Chamber is by a pair respectively from symmetrical inductive iris separates in the first narrow side wall 321 and in the second narrow side wall.Such as: the
One resonant cavity 37 is separated with the second resonant cavity 38 by the second inductive iris 26 and the 8th inductive iris 32.
Further, three important parameters in waveguide filter design are respectively: the natural resonance frequency of resonant cavity, phase
The coupled outside coefficient of interstage coupling coefficient and filter between adjacent resonant cavity.The resonance frequency of resonant cavity and waveguide are filtered
The size of the resonant cavity of wave device is related.The width and height of all resonant cavities of waveguide filter are fixed dimension, are respectively
It is determined by the air chamber cross-sectional width and height of waveguide input or output port, respectively 7.112 millimeters and 3.556 millimeters,
So the resonance frequency of the resonant cavity of waveguide filter is related with the length of the resonant cavity of waveguide filter.The length of resonant cavity is
Spacing in first narrow side wall 321 or the second narrow side wall between adjacent inductive diaphragm, the length of the resonant cavity of waveguide filter
Degree is longer, then the resonance frequency of the resonant cavity of waveguide filter is lower, and the length of the resonant cavity of waveguide filter is shorter, then waveguide
The resonance frequency of the resonant cavity of filter is higher.Use l respectively in Fig. 21、l2、l3、l4And l5Indicate the length of the first resonant cavity 37
Degree, the length of the second resonant cavity 38, the length of third resonant cavity 39, the length of the 4th resonant cavity 40 and the 5th resonant cavity 41
Length.Such as: l1Length is the right side of the first inductive iris 25 to the length between 26 left side of the second inductive iris, or
Person, l1For the 7th inductive iris 31 right side to the length between the left side of the 8th inductive iris 32.The length of five resonant cavities
Angle value is as follows: l1It is 3.670 millimeters, l2It is 4.400 millimeters, l3It is 4.564 millimeters, l4For 4.400 millimeters and l5For 3.670 millis
Rice.
Further, the interstage coupling coefficient between adjacent resonators comes from the first narrow side wall 321 and second by a pair
Window size in narrow side wall between symmetrical inductive iris determines, symmetrical in the first narrow side wall 321 and the second narrow side wall
Inductive iris between window size include: window is high, window is wide and window is long, the wherein a height of waveguide port of window
Depth of section is 3.556 millimeters, and the thickness of a length of inductive iris of window, for convenience of designing, all thickness are both designed as fixing
1.400 millimeters of value, window width is the air chamber in the first narrow side wall 321 and the second narrow side wall between symmetrical inductive iris
Spacing.Window is wide bigger, then the interstage coupling coefficient between adjacent resonators is bigger.Such as: the first resonant cavity 37 and second humorous
Interstage coupling coefficient between vibration chamber 38 is determined by the window size between the second inductive iris 26 and the 8th inductive iris 32
It is fixed, wherein air chamber spacing of the window width between the second inductive iris 26 and the 8th inductive iris 32.
Further, the coupled outside coefficient of waveguide filter is respectively by the first inductive iris 25 and the 7th inductive film
Window size between piece 31, and, the window size between the 6th inductive iris 30 and the 12nd inductive iris 36 is determined
It is fixed.Under the premise of window height and window are long determining, window is wide bigger, and the coupled outside coefficient of waveguide filter is smaller.
In actual design, required phase can be obtained by designing reasonable window size in electromagnetic simulation software
The coupled outside coefficient of interstage coupling coefficient and waveguide filter between adjacent resonant cavity, thus the guide filter needed for realizing
Device bandwidth and passband radio-frequency responsive.
Referring to Fig. 4, Fig. 4 is a kind of structural representation of the waveguide flange of waveguide filter provided in an embodiment of the present invention
Figure.
As shown in figure 4, first wave guide ring flange 1 and second waveguide ring flange 2 are containing there are four the through-holes of axial symmetry distribution
42, through-hole 42 is connect for this waveguide filter with other waveguide assemblies under the auxiliary of the fasteners such as screw.Ring flange it is detailed
Thin size and lead to the hole site are referring to the WR-28 ring flange and through-hole parameter in national standard code BJ320 standard.
Further, first wave guide ring flange 1, second waveguide ring flange 2 and rectangular aperture waveguide 3 use nonmetallic materials
As structural material, integrally printed by 3-D printer.Nonmetallic materials can using photosensitive resin, plastics, nylon and
The nonmetallic materials such as ceramics, it is preferred to use ceramic photosensitive resin passes through stereolithography 3-D printer one as structural material
It prints.Ceramic photosensitive resin has the advantage that density is small, with stereolithography 3-D printer good compatibility, compares normal light
Quick resin mechanical strength is higher, and heat resistance is more preferable and thermal expansion coefficient is smaller.Use ceramic photosensitive resin as guide filter
The purpose of the structural material of device is: on the one hand, can satisfy in practical engineering application to the mechanical strength of waveguide filter and temperature
The demand of degree；On the other hand, under the premise of not sacrificing waveguide filter radio-frequency performance, waveguide filter can be greatly reduced
Quality.
In a kind of waveguide filter provided in an embodiment of the present invention, waveguide filter includes first wave guide ring flange, second
Waveguide flange and rectangular aperture waveguide are integrally machined molding using 3-D printing technique.It is two narrow inside rectangular aperture waveguide
The symmetrical inductive iris of multiple groups is devised in side wall, is multiple resonant cavities by rectangular aperture waveguide inside division.Pass through design
The length of resonant cavity can control the resonance frequency of corresponding resonant cavity.Pass through the window between each group of inductive iris of design
Size can control the interstage coupling coefficient of adjacent resonators and the coupled outside coefficient of waveguide filter.Waveguide filter
Structure is using low-density and heat-resist ceramic photosensitive resin is integrally printed with High Precision Stereo photoetching 3-D printer,
Without assembly while realizing accurate processing, and potential realization small lot quickly produces, and effectively improves manufacture effect
Rate, and manufacture material can satisfy conventional project using the heatproof demand to waveguide device.
Referring to Fig. 5, Fig. 5 is a kind of flow diagram of waveguide filter manufacturing method provided in an embodiment of the present invention.
As shown in figure 5, the flow chart includes:
S101, the electronic model that waveguide filter is put according to predetermined angle, using stereolithography 3-D printer using non-
Metal material prints the original workpiece of filter according to the electronic model of waveguide filter.Wherein, original workpiece includes: first
Waveguide flange, second waveguide ring flange and rectangular aperture waveguide, original workpiece are the entirety that can not be split；
Wherein, predetermined angle refers to the electronic model by reasonable placement waveguide filter, is allowed to be tilted a certain angle, from
And waveguide filter inside cavity is generated without backing material during so that stereolithography 3-D printer is printed waveguide filter.
Further, the electronic model of waveguide filter is the waveguide designed according to the design principle of foregoing invention embodiment
The threedimensional electronic model of filter.
Further, first wave guide ring flange, second waveguide ring flange and rectangular aperture waveguide are made using nonmetallic materials
For structural material, integrally printed by 3-D printer.Nonmetallic materials can use photosensitive resin, plastics, nylon and pottery
The nonmetallic materials such as porcelain, it is preferred to use ceramic photosensitive resin is integrally beaten as structural material, by stereolithography 3-D printer
It prints.Ceramic photosensitive resin has the advantage that density is small, more photosensitive than common with stereolithography 3-D printer good compatibility
Resin mechanical strength is higher, and heat resistance is more preferable and thermal expansion coefficient is smaller.Use ceramic photosensitive resin as waveguide filter
The purpose of structural material be: on the one hand, can satisfy in practical engineering application to the mechanical strength of waveguide filter and temperature
Demand；On the other hand, under the premise of not sacrificing waveguide filter radio-frequency performance, waveguide filter can be greatly reduced
Quality.
Further, using technical grade stereolithography 3-D printer, the landscape orientation of stereolithography 3-D printer is differentiated
Rate are as follows: 1 micron × 1 micron, longitudinal print resolution, i.e. printed material stack thickness and be set as 50 microns.Stereolithography 3-D is beaten
After print machine completes print out task, original workpiece is taken out, following subsequent processing is carried out to original workpiece.
S102, using ultraviolet light solidify original workpiece, and by the original workpiece after solidification be placed in air blast electric dry oven into
Row heat treatment, obtains the physical model of 3-D printing.
Wherein, include: using the specific steps that ultraviolet light solidifies original workpiece
Curing molding for the first time is carried out to original workpiece using ultraviolet laser in stereolithography 3-D printer.
Further, chemical cleaning and physical cleaning are carried out to original workpiece.Original workpiece is placed in of short duration leaching in acetone
Bubble wipes original workpiece surface with wool brush, dissolves the uncured resin on original workpiece surface, then is placed in clean acetone clear
It washes, repeatedly, until original workpiece surface is without uncured resin residue.
Further, the cleaning agent on original workpiece surface is dried up, with compressed air to reach preliminarily dried original workpiece
Purpose.
Further, using the original workpiece after ultraviolet curing, method particularly includes: by the original after preliminarily dried
Beginning workpiece is placed in UV cure lamp case, and drying and curing 30 minutes.The purpose is to thoroughly dry the interior appearance of original workpiece
Face, and promote the mechanical strength of resin.
Further, after using ultraviolet light solidification original workpiece further include:
Original workpiece after solidification is subjected to blasting treatment, and the original workpiece after blasting treatment is subjected to manual polishing.
Wherein, the original workpiece after solidification is subjected to blasting treatment method particularly includes:
Workpiece after dry solidification is placed in sand-blasting machine, preferred sandblasting air pressure is 40psi, using No. 800 Limbra Stones,
Comprehensive blasting treatment is carried out to original workpiece.The purpose of this step is removal original workpiece resin impurity remained on surface.
Further, the original workpiece after blasting treatment is subjected to manual polishing method particularly includes:
First with No. 400 sand paper rough grinding original workpiece surfaces, surface pattern is removed, adds water to beat with No. 600 sand paper again later
The surface of mill original workpiece finally adds crystal carefully to polish to improve original workpiece surface smoothness with No. 1000 sand paper, final
To the resin surface of smooth exquisiteness.
Further, the original workpiece after solidification is placed in the specific method being heat-treated in air blast electric dry oven includes:
Original workpiece after fine polishing is placed in air blast electric dry oven, heat treatment parameter is set are as follows: from room in 2 hours
Temperature is warmed to 160 DEG C, keeps the temperature 2 hours under 160 DEG C of air environment later, finally from 160 DEG C of cooled to room temperatures.At heat
The purpose of reason is to increase the toughness and heat resistance of resin.
S103, it metallizes on the surface of the physical model of 3-D printing, obtains waveguide filter.
The specific steps to metallize to the surface of original workpiece include:
Chemical roughening and chemical activation are carried out to resin surface, and one layer of nickel of chemical plating, as seed layer, nickel layer thickness is about
It is 100 nanometers.
Further, the electro-coppering on nickel layer, copper layer thickness are 5 microns.
Further, the chemical silvering on copper electroplating layer, silver thickness are 1 micron, finally obtain waveguide filter.
Please refer to Fig. 6 and Fig. 7, Fig. 6 be a kind of waveguide filter provided in an embodiment of the present invention the emulation of Ka full frequency band with
The scattering parameter curve graph of measurement, Fig. 7 are a kind of waveguide filter provided in an embodiment of the present invention in Ka full frequency band different batches
The passband scattering parameter curve graph of multiple sample emulation and measurement.
As shown in Figure 6 and Figure 7, in order to prove the excellent radio-frequency performance of Ka frequency range waveguide filter in the embodiment of the present invention,
The scattering parameter of the waveguide filter is emulated and has been measured, and and with tradition machinery processing technology make identical structure
Filters made from aluminium compares.As can be seen that the radio-frequency performance for the waveguide filter realized using stereolithography 3-D printing technique
It can be comparable with the radio-frequency performance for the identical Structure Filter realized with tradition machinery processing technology.What increases material manufacturing technology was realized
The free transmission range of waveguide filter is 30.1-33.7GHz, and pass band insertion loss is 0.23-0.5dB, and passband return loss is better than
17dB, and without assembly and any fastener, and have compared with the smaller band connection frequency offset of the latter and smaller quality, increase material system
The filter quality made is 12.6 grams, and the filters made from aluminium quality of tradition machinery processing technology manufacture is 20.5 grams, compares it
Lower increasing material manufacturing filter quality mitigates about 39%.
In embodiment provided herein, it should be understood that disclosed structure and processing method can pass through it
Its mode is realized.For example, waveguide filter example structure described above is only schematical, for example, fluting
Notch size and inductive iris size, only a kind of achievable physical structure can follow design principle in practice and set
It is calculated as other reasonable sizes.The processing of another point, waveguide filter can also use other resin materials or other increasing materials
Manufacturing technology is realized, can select suitable 3-D printed material and 3-D printer according to the demand of practical application.
The above are the descriptions to a kind of waveguide filter provided by the present invention and its manufacturing method, for the skill of this field
Art personnel, thought according to an embodiment of the present invention, there will be changes in the specific implementation manner and application range.To sum up,
The contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of waveguide filter, which is characterized in that the waveguide filter includes:
First wave guide ring flange, second waveguide ring flange and rectangular aperture waveguide；
A perforative rectangular channel, the rectangular aperture waveguide are provided on two broadside wall middle lines of the rectangular aperture waveguide
Two narrow side walls on be provided with multiple rectangular channels, include multiple groups inductive on two narrow side walls inside the rectangular aperture waveguide
The inside division of the rectangular aperture waveguide is multiple resonant cavities by diaphragm, the multiple groups inductive iris；
The left end of the rectangular aperture waveguide is connect with the first wave guide ring flange, the right end of the rectangular aperture waveguide and institute
State the connection of second waveguide ring flange.
2. waveguide filter according to claim 1, which is characterized in that
The rectangular aperture waveguide is the rectangular parallelepiped structure of inner hollow, and the rectangular aperture waveguide includes the first opposite narrow side
Wall and the second narrow side wall, and, opposite the first broadside wall and the second broadside wall, the equal court of rectangular channel on the first narrow side wall
To the rectangular aperture waveguide inside and through the first narrow side wall, the rectangular channel on the first narrow side wall is by described
First wave guide ring flange is arranged towards the direction of the second waveguide ring flange, the notch of the rectangular channel on the first narrow side wall
It is rectangle；
The rectangular channel on rectangular channel and the first narrow side wall on the second narrow side wall, puts down about on the first broadside wall
Plane of the row where being parallel to the center line of long side on the center line and the second broadside wall of long side is symmetrical.
3. waveguide filter according to claim 2, which is characterized in that
Rectangular channel on the first broadside wall be particularly located at be parallel on the first broadside wall long side center line institute it is in place
Set, the rectangular channel on the second broadside wall be particularly located at be parallel on the second broadside wall long side center line institute it is in place
It sets, and the notch of perforative rectangular channel is rectangle on the first broadside wall and the second broadside wall.
4. waveguide filter according to claim 3, which is characterized in that on the first narrow side wall and second narrow side
An inductive iris are designed every two rectangular channels on wall, the inductive iris designed on the first narrow side wall and described the
The inductive iris designed on two narrow side walls, about the center line of the first broadside wall and the center line of the second broadside wall
The plane at place is symmetrical.
5. waveguide filter according to claim 4, which is characterized in that adjacent resonance inside the rectangular aperture waveguide
Chamber neutralizes symmetrical inductive iris in the second narrow side wall respectively from the first narrow side wall by a pair and separates.
6. waveguide filter according to claim 5, which is characterized in that the first wave guide ring flange from first end face to
The second end face on its opposite is provided with section for the waveguide port of rectangle, in the waveguide port and rectangular aperture waveguide inside
The first port of empty part is connected, and the cross-sectional sizes of the waveguide port and the rectangular aperture waveguide interior hollow section
The cross-sectional sizes of first port are identical；
The second waveguide ring flange is provided with the waveguide port that section is rectangle, institute from first end face to the second end face on its opposite
It states waveguide port to be connected with the second port of the rectangular aperture waveguide interior hollow section, and section of the output waveguide port
Face size is identical as the cross-sectional sizes of second port of the rectangular aperture waveguide interior hollow section.
7. according to claim 1 to waveguide filter described in 6 any one, which is characterized in that the first wave guide ring flange
Containing with the second waveguide ring flange has multiple screw holes；
The first wave guide ring flange, the second waveguide ring flange and the rectangular aperture waveguide are made using nonmetallic materials
For structural material, by stereolithography 3-D printer, integrally printing is made.
8. a kind of waveguide filter manufacturing method, which is characterized in that the method is for any one of manufacturing claims 1 to 7 institute
The waveguide filter stated, which comprises
The electronic model that waveguide filter is put according to predetermined angle uses nonmetallic materials using stereolithography 3-D printer
The original workpiece of the filter is printed according to the electronic model of the waveguide filter, wherein the original workpiece includes:
First wave guide ring flange, second waveguide ring flange and rectangular aperture waveguide, the original workpiece are the entirety that can not be split；
Solidify the original workpiece using ultraviolet light, and the original workpiece after solidification is placed in air blast electric dry oven and is carried out
Heat treatment obtains the physical model of 3-D printing；
It metallizes on the surface of the physical model of 3-D printing, obtains waveguide filter.
9. according to the method described in claim 8, it is characterized in that, described include: using the ultraviolet light solidification original workpiece
Curing molding for the first time is carried out to the original workpiece using ultraviolet laser in the stereolithography 3-D printer；
The original workpiece after molding is subjected to chemical cleaning and physical cleaning, and dry completion chemical cleaning and physical cleaning
The original workpiece afterwards；
The original workpiece after ultraviolet light again curing and drying is used in ultraviolet light lamp box.
10. according to the method described in claim 9, it is characterized in that, after the original workpiece using ultraviolet light solidification
Further include:
The original workpiece after solidification is subjected to blasting treatment, and the original workpiece after blasting treatment beat by hand
Mill.
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| CN201811002420.8A CN109103556A (en) | 2018-08-30 | 2018-08-30 | Waveguide filter and its manufacturing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289496A (en) * | 2019-06-03 | 2019-09-27 | 深圳大学 | A kind of waveguide horns and its manufacturing method |
| CN114927844A (en) * | 2022-07-20 | 2022-08-19 | 南京天朗防务科技有限公司 | Waveguide filter of Ku wave band |
| WO2023078945A1 (en) * | 2021-11-05 | 2023-05-11 | Friedrich-Alexander-Universität Erlangen-Nürnberg | Method for smoothing the inner side of a high-frequency waveguide |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0299616A2 (en) * | 1987-07-14 | 1989-01-18 | THE GENERAL ELECTRIC COMPANY, p.l.c. | A waveguide arrangement |
| CN1735994A (en) * | 2002-12-09 | 2006-02-15 | 汤姆森许可贸易公司 | Bandpass filter with pseudo-elliptic response |
| WO2017149423A1 (en) * | 2016-03-04 | 2017-09-08 | Swissto12 Sa | Method for the additive manufacturing of a waveguide and waveguide devices produced according to said method |
| CN107498048A (en) * | 2017-09-04 | 2017-12-22 | 中国电子科技集团公司第四十研究所 | A kind of microwave part precision manufactureing method and application based on metal 3D printing |
| CN108270077A (en) * | 2017-12-19 | 2018-07-10 | 上海交通大学 | Waveguide gap array anti-interference antenna |
-
2018
- 2018-08-30 CN CN201811002420.8A patent/CN109103556A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0299616A2 (en) * | 1987-07-14 | 1989-01-18 | THE GENERAL ELECTRIC COMPANY, p.l.c. | A waveguide arrangement |
| CN1735994A (en) * | 2002-12-09 | 2006-02-15 | 汤姆森许可贸易公司 | Bandpass filter with pseudo-elliptic response |
| WO2017149423A1 (en) * | 2016-03-04 | 2017-09-08 | Swissto12 Sa | Method for the additive manufacturing of a waveguide and waveguide devices produced according to said method |
| CN107498048A (en) * | 2017-09-04 | 2017-12-22 | 中国电子科技集团公司第四十研究所 | A kind of microwave part precision manufactureing method and application based on metal 3D printing |
| CN108270077A (en) * | 2017-12-19 | 2018-07-10 | 上海交通大学 | Waveguide gap array anti-interference antenna |
Non-Patent Citations (1)
| Title |
|---|
| XIAOBANG SHANG ET AL: "W-band Waveguide Filters Fabricated by Laser Micromachining and 3-D Printing", 《IEEE TRANSACTIONS AND MICROWAVE THEORY AND TECHNIQUES》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289496A (en) * | 2019-06-03 | 2019-09-27 | 深圳大学 | A kind of waveguide horns and its manufacturing method |
| WO2023078945A1 (en) * | 2021-11-05 | 2023-05-11 | Friedrich-Alexander-Universität Erlangen-Nürnberg | Method for smoothing the inner side of a high-frequency waveguide |
| DE102021128881A1 (en) | 2021-11-05 | 2023-05-11 | Friedrich-Alexander-Universität Erlangen-Nürnberg, Körperschaft des öffentlichen Rechts | Process for smoothing the inside of a high-frequency waveguide |
| CN114927844A (en) * | 2022-07-20 | 2022-08-19 | 南京天朗防务科技有限公司 | Waveguide filter of Ku wave band |
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Application publication date: 20181228 |