CN110504516A - Deformed spherical waveguide resonator, filter based on same and processing method of deformed spherical waveguide resonator - Google Patents
Deformed spherical waveguide resonator, filter based on same and processing method of deformed spherical waveguide resonator Download PDFInfo
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- CN110504516A CN110504516A CN201910818939.1A CN201910818939A CN110504516A CN 110504516 A CN110504516 A CN 110504516A CN 201910818939 A CN201910818939 A CN 201910818939A CN 110504516 A CN110504516 A CN 110504516A
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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
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
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Abstract
The invention discloses a deformed spherical waveguide resonator, a filter based on the deformed spherical waveguide resonator and a processing method of the filter. The coupling direction between adjacent resonant cavities is rotated by 90 degrees by changing the arrangement mode of the five deformed spherical waveguide resonators, so that the coupling component of a higher-order mode is reduced; the frequency interval between the higher mode and the basic mode is increased by carrying out recess treatment on the top surface and the bottom surface of the spherical waveguide resonator, a wider non-stray stop band is realized, and the higher modes of the resonant cavities are different due to different recess depths of the resonant cavities, so that the stray pass band is damaged; crossed slots are formed in the centers of the top and bottom depressions of the third resonator, so that the radiation loss of a high-order mode is reduced, and the stray suppression capability exceeding 34dB in a wide stop band is realized.
Description
Technical field
The invention belongs to wireless communication technology fields, and in particular to a kind of to deform spherical waveguide resonator and the filter based on it
Wave device and its processing method.
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., the strong, radio frequency loss with spurious reduction ability
The advantages such as low and power capacity is big, are one of the emphasis of researcher's concern.
In general, selection high quality factor (Q) resonator as far as possible is to realize lesser radio frequency loss.The metal of air filling
Cavity resonator power capacity generally with higher, Q value depend primarily on cavity geometry, conductivity and its surface
Roughness.In all possible 3 dimensional coil geometry, spherical resonator has since it is with highest mass-surface ratio
There is highest Q value, under identical working frequency, the Q value of spherical cavity is 1.8 times of the Q of rectangle.And in recent years, increasing material manufacturing
(AM) fast development of technology provides good technical support for the waveguide device physics realization of geometry complexity.
But since spherical waveguide resonant cavity internal schema is various, and higher mode and fundamental frequencies interval are smaller, based on spherical
The filter of waveguide resonator has more spuious passband, and spuious passband and intended pass-band interval are smaller.Therefore, filter
High out-of-side rejection and the wide difficult point for becoming the design of the filter based on spherical waveguide resonator without spuious stopband designing technique
And key technology.
In addition, increasing material manufacturing (AM) technology is able to achieve the integration processing of device, the dress during device fabrication is reduced
With error and cost, it is able to achieve tradition and subtracts the irrealizable labyrinth of material manufacturing technology institute.But it is special, utilize metal SLM
The upper surface for the device that printing technology is realized has surface roughness high, is distorted serious feature, this will will lead to the product of device
Prime factor reduces, penalty.
Summary of the invention
Spherical waveguide resonator is deformed and based on its filter and processing method, purport it is an object of that present invention to provide a kind of
A kind of high out-of-side rejection and the wide spherical waveguide resonator of deformation without spuious stopband are being designed, a kind of base of the resonator design is based on
In the spherical waveguide resonator of the deformation and there is filter of the width with rejection, and 3D printing technological design is combined to reduce
The processing method of roughness inside processing device.
To achieve the goals above, the technical solution adopted by the present invention is that, the spherical waveguide resonator of a kind of deformation, including become
The spherical waveguide resonant cavity of shape, first wave guide ring flange and second waveguide ring flange, deforming spherical waveguide resonant cavity is bottom and top
Portion is equipped with the spherical waveguide resonant cavity of spherical depression deformation；First wave guide ring flange and second waveguide ring flange are parallel to deformation
The line of spherical depression center of deformation is provided at the top and bottom of spherical waveguide resonant cavity；First wave guide ring flange and second
Waveguide flange is parallel to each other, at the coupling for deforming spherical waveguide resonant cavity and first wave guide ring flange and second waveguide ring flange
Open up the first coupling window and the second coupling window.
As the depth for deforming spherical waveguide resonant cavity spherical depression deformation increases, the radius of spherical waveguide resonant cavity is deformed
Reduce.
First coupling window and the second coupling window are rectangle coupling window, and the long side of the first coupling window and the second coupling window is vertical
In the top and bottom spherical depression center of deformation line for deforming spherical resonator.
It deforms and opens up rectangular channel, the rectangular channel on the spherical depression deformation plance of spherical waveguide resonant cavity bottom surface and top surface
Long side be parallel to first wave guide ring flange and second waveguide ring flange, the center of the rectangular channel and spherical depression deformation plance
Center is overlapped.
It is provided with boss at the coupling of first wave guide ring flange and second waveguide ring flange and the spherical waveguide resonant cavity of deformation,
It deforms spherical waveguide resonant cavity and is embedded in the boss.
It deforms and opens up cross bath on the spherical depression deformation plance of spherical waveguide resonant cavity bottom surface and top surface；The cross
The center of shape slot is overlapped with the center of spherical depression deformation plance；The cross bath includes two and is mutually perpendicular to the rectangle intersected
Slot, the long side of one of rectangular channel are parallel to first wave guide ring flange.
A kind of filter based on the spherical waveguide resonator of deformation, including the spherical waveguide resonant cavity of deformation, first wave inducing defecation by enema and suppository
Blue disk and second waveguide ring flange；Wherein, it deforms there are five spherical waveguide resonant cavity settings, i.e., the first spherical wave guide resonance of deformation
Chamber, the spherical waveguide resonant cavity of the second deformation, third deform spherical waveguide resonant cavity, the spherical waveguide resonant cavity of the 4th deformation and the 5th
Deform spherical waveguide resonant cavity；The spherical waveguide resonant cavity of first deformation is connect with first wave guide ring flange, the 5th shape-changeable ball
Shape waveguide resonant cavity is connected with second waveguide ring flange；The second spherical waveguide resonant cavity of deformation deforms spherical waveguide with first respectively
Resonant cavity and third deform spherical waveguide resonant cavity coupling；The 4th spherical waveguide resonant cavity of deformation deforms spheric wave with the 5th respectively
It leads resonant cavity and third deforms spherical waveguide resonant cavity coupling；Wherein third deform spherical waveguide resonant cavity top and bottom it is equal
Open up cross bath；
The coupling direction of the spherical waveguide resonant cavity of second deformation and the first spherical waveguide resonant cavity of deformation becomes perpendicular to second
The spherical waveguide resonant cavity of shape and third deform the coupling direction of spherical waveguide resonant cavity；
Third deforms spherical waveguide resonant cavity and the coupling direction of the 4th spherical waveguide resonant cavity of deformation becomes perpendicular to second
The spherical waveguide resonant cavity of shape and third deform the coupling direction of spherical waveguide resonant cavity；
Third deforms spherical waveguide resonant cavity and the coupling direction of the 4th spherical waveguide resonant cavity of deformation becomes perpendicular to the 4th
The spherical waveguide resonant cavity of shape and the 5th spherical waveguide resonant cavity of shape.
The spherical depression deforming depth that third deforms spherical waveguide resonant cavity is greater than remaining the four spherical wave guide resonances of deformation
The spherical depression deforming depth of chamber.
It is round coupling window between the spherical waveguide resonant cavity of first deformation and the second spherical waveguide resonant cavity of deformation；
It is round coupling window that the spherical waveguide resonant cavity of second deformation and third, which deform between spherical waveguide resonant cavity,；
It is round coupling window that third, which deforms between spherical waveguide resonant cavity and the 4th spherical waveguide resonant cavity of deformation,；
It is round coupling window between the spherical waveguide resonant cavity of 4th deformation and the 5th spherical waveguide resonant cavity of deformation.
A kind of processing method based on the filter for deforming spherical waveguide resonator, is processed using 3D printing technique, will be filtered
The side of wave device is printed as basal plane, and several first supporting elements and the second supporting element, first support is arranged in when printing
Part top surface is set as cambered surface, and the shape of the cambered surface distinguishes the spherical waveguide resonant cavity of corresponding deformation and third deformation is spherical
The matching of waveguide resonant cavity surface shape；Second support surface is inclined-plane, and the second supporting element is used to support first wave guide ring flange
With second waveguide ring flange.
Compared with prior art, the present invention at least has the advantages that spherical the first high-order of waveguide resonator of deformation
The eigen mode frequency and Q-unloaded of mould are higher than the eigen mode frequency and unloaded quality of the first high-order mode of rectangle resonator
Factor, higher mode can be zoomed out using the deformation of top and bottom spherical depression by deforming spherical waveguide resonator.
Further, one is opened up on the spherical waveguide resonant cavity of deformation based on the filter for deforming spherical waveguide resonator
Rectangular channel can fall higher mode radiation loss without influencing basic mode, so as to improve the higher mode of the spherical waveguide resonator of deformation
Rejection characteristic.
Further, the electric current that the cross bath opened up on spherical waveguide resonant cavity is parallel to basic mode TM101 is deformed, vertically
The electric current of higher mode TM102 and TM201 are cut, to make higher mode radiation loss, and then better higher mode is obtained and inhibits effect
Fruit.
Further, each resonant cavity cup depth of filter is different, and the higher mode frequency of each resonant cavity is different, in turn
The spuious passband for destroying higher mode generation, improves the stopband spurious reduction characteristic of filter.
It is of the present invention that spherical waveguide resonant cavity is deformed based on the third for offering cross recess and deforms spherical wave guide resonance
The filter of chamber keeps coupling direction between adjacent resonators orthogonal, utilizes the knot by the arrangement mode of each resonant cavity of change
Structure reduces the stiffness of coupling of higher mode TM211, improves the Out-of-band rejection effect of filter.
The present invention is prepared using 3D printing technique based on the Wide stop bands rejects trap for deforming spherical waveguide resonator, is used
Basal plane when its side is as printing, reduces required lower surface support construction, so that processed filter be made to have more
High Q-unloaded reduces the pass-band loss of filter.
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 for deforming spherical waveguide resonator provided in an embodiment of the present invention；
Fig. 2 is a kind of cross-sectional view for deforming spherical waveguide resonator provided in an embodiment of the present invention；
Fig. 3 is that a kind of spherical depression for deforming spherical waveguide resonator provided in an embodiment of the present invention deforms implementation；
Fig. 4 is that higher mode deviates under a kind of spherical waveguide resonator difference cup depth of deformation provided in an embodiment of the present invention
Effect emulation result；
Fig. 5 is a kind of inclined shaft mapping opened single slot and deform spherical waveguide resonator provided in an embodiment of the present invention；
Fig. 6 is a kind of cross-sectional view opened single slot and deform spherical waveguide resonator provided in an embodiment of the present invention；
Fig. 7 provides the filter higher mode inhibitory effect emulation knot of three kinds of spherical resonant cavities of deformation for the embodiment of the present invention
Fruit；
Fig. 8 is surveyed to be provided in an embodiment of the present invention based on the inclined shaft for opening the filter that cross recess deforms spherical waveguide resonator
Figure；
Fig. 9 is provided in an embodiment of the present invention based on the section view opened cross recess and deform the filter C of spherical waveguide resonator
Figure；
Figure 10 provides three kinds of filter simulation results for the embodiment of the present invention.
It is in 45 ° of inclinations angle that Figure 11, which provides for the embodiment of the present invention based on the filter for opening the spherical waveguide resonator of cross recess,
3D printing method schematic diagram.
In attached drawing, 10- deforms spherical waveguide resonant cavity, and 10a- first deforms spherical waveguide resonant cavity, and 10b- second is deformed
Spherical waveguide resonant cavity, 10c- third deform spherical waveguide resonant cavity, and 10d- the 4th deforms spherical waveguide resonant cavity, 10e- the 4th
Spherical waveguide resonant cavity is deformed, the first coupling window of 101-, the second coupling window of 102-, 20-, which slots, deforms spherical waveguide resonant cavity,
The first rectangular channel of 201-, the second rectangular channel of 202-, 30- first wave guide ring flange, 40- second waveguide ring flange, 5- first are supported
Part, the second supporting element of 6-.
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 " top surface ", " bottom surface ", " left side ", " right side ",
The orientation or positional relationship of the instructions such as " horizontal direction " and " vertical direction " are that orientation based on the figure or position are closed
System is merely for convenience of the description embodiment of the present invention and simplifies description, and cannot regard as indicated element or device 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.
Refering to fig. 1 and Fig. 2, Fig. 1 are the inclined shaft mapping provided in an embodiment of the present invention for deforming spherical waveguide resonator, Fig. 2
For the sectional view of the spherical waveguide resonator of the first deformation provided in an embodiment of the present invention.
The spherical waveguide resonator of the deformation includes: first wave guide ring flange 30, second waveguide ring flange 40 and deformation
Spherical waveguide resonant cavity 10.Wherein, first wave guide ring flange 30 and second waveguide ring flange 40 are for phase between two waveguide mouths
It connects, and waveguide terminal is connect with the spherical waveguide resonator of deformation by ring flange；First wave guide ring flange 30 and the second wave
It leads and is provided with boss at the coupling of ring flange 40 and the spherical waveguide resonant cavity 10 of deformation, deform spherical waveguide resonant cavity 10 and be embedded in institute
State boss.
The size of first wave guide ring flange 30 and second waveguide ring flange 40 in the embodiment of the present invention is under X frequency range
WR-90 standard rectangular waveguide flange size, the size of the rectangular waveguide ring flange are 22.86mm × 10.16mm, rectangular wave
It is parallel with spherical resonant cavity top and bottom Depression Centers line is deformed to lead ring flange, the long side and deformation of rectangular waveguide ring flange
Spherical resonant cavity top and bottom Depression Centers line is perpendicular, waveguide flange with a thickness of 5mm.
All in the embodiment of the present invention are spherical based on the resonator for deforming spherical waveguide resonant cavity and based on the deformation
The filter wall thickness of waveguide resonator is 3mm.
Fig. 3 is the geometry signal of the spherical depression deformation of the spherical waveguide resonant cavity 10 of deformation provided in an embodiment of the present invention
The spherical depression of figure, spherical 10 bottom surface of waveguide resonant cavity of the deformation and top surface is deformed into spheric recess, and the spheric is recessed
Fall into is subtracted obtained by the intersecting therewith land portions of two spheres using the spherical cavity resonator geometry of target；Wherein sphere Q2 to be subtracted
Radius be r2, the radius of target cavity resonance is r1, the depth capacity d of sphere Q2 to be subtracted and target cavity resonance intersection
For the recess depth capacity of spherical depression deformation on the spherical resonant cavity 10 of deformation, the depth capacity of the spherical depression deformation
No more than the radius for deforming spherical waveguide resonant cavity 10.
It is described that its frequency response is investigated using dual-port weak coupling emulation based on the resonator for deforming spherical waveguide resonant cavity,
It deforms and offers the first coupling window 101 and the second coupling window 102 on spherical waveguide resonant cavity 10, the first coupling window 101 and second
Coupling window 102 is respectively first wave guide ring flange 30 and second waveguide ring flange 40 and the coupling for deforming spherical waveguide resonant cavity 10
Window, the sectional dimension of the rectangle coupling window are 3.43mm × 10.16mm；102 branch of first coupling window 101 and the second coupling window
It is provided with and 40 junction of first wave guide ring flange 30 and second waveguide ring flange, the first coupling window 101 and the second coupling window 102
Line of the line at center perpendicular to deformation spherical resonant cavity top and bottom Depression Centers.
Fig. 4 is a kind of depth for deforming spherical waveguide resonant cavity 10 and deforming with spherical depression provided in an embodiment of the present invention
D changes lower higher mode offset effect simulation result comparison；Radius of sphericity r2=17.5mm to be subtracted, in order to keep spherical based on deforming
The resonator basic mode of waveguide resonant cavity is constant, when the depth d of spherical depression deformation increases, deforms the half of spherical waveguide resonant cavity 10
Diameter should reduce therewith, d=0mm, r1=13.1；D=2mm, r1=12.925；D=4mm, r1=12.417；D=6mm, r1=
11.67；Depth d with spherical depression deformation increases, and frequency interval of the higher mode TM201 and TM102 with respect to basic mode TM101 increases
Greatly, thus it is broader without spuious stopband to be provided based on the resonator for deforming spherical waveguide resonant cavity；But as spherical surface is recessed
The depth d of notch distortion increases, and the Q-unloaded based on the resonator for deforming spherical waveguide resonant cavity is in a slight decrease,
The eigen mode frequency and Q-unloaded (6850) of first high-order mode are still higher than rectangle resonator by 27% and 13%, need to infuse
Meaning, it is described that the method for top and bottom spherical depression deformation is utilized only based on the resonator for deforming spherical waveguide resonant cavity
Higher mode can be zoomed out, higher mode can not be eliminated.
Fig. 5 is the resonator inclined shaft mapping provided in an embodiment of the present invention that spherical waveguide resonant cavity is deformed based on fluting, Fig. 6
For the cross-sectional view of the resonator provided in an embodiment of the present invention for deforming spherical waveguide resonant cavity based on fluting；It is described to be become based on fluting
The resonator of the spherical waveguide resonant cavity of shape includes: that first wave guide ring flange 30, second waveguide ring flange 40 and fluting deformation are spherical
Waveguide resonant cavity；Fluting deforms spherical waveguide resonant cavity two-port and opens up the first coupling window 101 and the second coupling window 102, and first
101 phase of the first coupling window of the size of coupling window 101 and the second coupling window 102 and the both ends for deforming spherical waveguide resonant cavity 10
Together；Fluting, which deforms spherical waveguide resonant cavity, to be improved on the basis of deforming spherical waveguide resonant cavity 10, specifically, becoming
The Depression Centers of the top and bottom of the spherical waveguide resonant cavity 10 of shape open up the first rectangular channel 201 and the second rectangular channel 202 respectively
It is formed, the long side of first rectangular channel 201 and the second rectangular channel 202 is parallel to the first wave guide ring flange 30 and the second wave
The long side of ring flange 40 is led, and its physical size is 16mm × 1.5mm.First rectangular channel 201 and the second rectangular channel 202 are flat
The surface current that row is generated in the recess basic mode for deforming spherical waveguide resonant cavity in the fluting, the first rectangular channel 201 and the
The surface current that two rectangular channels 202 are generated perpendicular to higher mode TM201, therefore, the first rectangular channel 201 and the second rectangular channel 202
Higher mode radiation loss can be fallen without influencing basic mode, so as to improve the resonance for deforming spherical waveguide resonant cavity based on fluting
The higher mode rejection characteristic of device.
Since the spherical waveguide resonant cavity 10 of deformation has axial symmetry, there is higher mode TM201 polarization to annex mould
Formula TM102 deforms a pair of of polarization merger higher mode in spherical waveguide resonant cavity to further eliminate the fluting, in the change
The spherical 10 top and bottom Depression Centers of guide filter chamber of shape open cross bath, so that forming third deforms spherical waveguide resonant cavity
10c；The cross bath includes two mutually perpendicular rectangular channels, and the size of the rectangular channel is 16mm × 1.5mm；It is described
It is respectively 6820 Hes that the spherical waveguide resonant cavity of fluting deformation and third, which deform the Q-unloaded of spherical waveguide resonant cavity 10c,
6800, so, very little is influenced on basic mode in the deformation spherical waveguide resonant cavity top and bottom fluting.
With reference to Fig. 7, it is provided by the invention based on deform the resonator a of spherical resonant cavity, based on the shape-changeable ball for opening rectangular channel
The higher mode inhibitory effect of the resonator b of shape waveguide resonant cavity and the resonator c based on the spherical resonant cavity of deformation for opening cross recess
Simulation result；As shown in Figure 7, described that high order can only be made using spherical depression deformation based on the resonator for deforming spherical resonant cavity
The interval of mould and basic mode increases, and higher mode still remains；And it is described based on the spherical waveguide resonant cavity of deformation for opening rectangular channel
Resonator and the resonator that spherical resonant cavity 10c is deformed based on the third for opening cross recess utilize deform spherical resonant cavity top surface and
Bottom surface fluting realizes the method for higher mode radiation loss will to the good inhibitory effect of higher mode, due to swashing for the resonator
The mode of encouraging is only capable of having motivated the TM201 annexed in higher mode, therefore, described based on the spherical wave guide resonance of deformation for opening rectangular channel
The resonator of chamber and the resonator for deforming spherical resonant cavity 10c based on the third for opening cross recess have identical higher mode to inhibit effect
Fruit.
It is provided in an embodiment of the present invention a kind of based on the filter inclined shaft for opening cross recess and deforming spherical resonant cavity with reference to Fig. 8
Mapping, Fig. 9 are the cross-sectional view of the filter provided in an embodiment of the present invention based on the spherical resonant cavity of deformation for opening cross recess；It is described
Include: first wave guide ring flange 30, second waveguide ring flange 40, four based on opening cross recess to deform the filter of spherical resonant cavity
A spherical waveguide resonant cavity of deformation and a third deform spherical waveguide resonant cavity 10c；Remaining the four spherical wave guide resonances of deformation
Chamber is respectively the spherical waveguide resonant cavity 10a of the first deformation, the spherical waveguide resonant cavity 10b of the second deformation, the 4th spherical waveguide of deformation
The spherical waveguide resonant cavity 10e of the deformation of resonant cavity 10d and the 5th；First wave guide ring flange 30 and the first spherical waveguide resonant cavity of deformation
10a connection, the second waveguide ring flange 40 are connect with the 4th spherical resonator 10d of deformation；The first spherical waveguide of deformation is humorous
The coupling window of the coupling window of vibration chamber 10a and the 4th spherical resonator 10d of deformation are rectangle, the long a1=of rectangle coupling window
14.576mm, width b1=10.15mm.
In order to improve the filter for deforming spherical resonant cavity 10c and the spherical resonant cavity 10 of deformation based on the third for opening cross recess
The stopband rejection characteristic of wave device, the arrangement mode by changing resonant cavity make coupling direction between each adjacent resonators hang down mutually
Directly, i.e., the spherical waveguide resonant cavity 10b of the second deformation and third deform the coupling direction between spherical resonant cavity 10c relative to first
Coupling direction has rotated 90 ° counterclockwise between deforming the spherical waveguide resonant cavity 10b of the deformation of spherical waveguide resonant cavity 10a and second, opens
Coupling direction is relative to second between the third of cross recess deforms the spherical waveguide resonant cavity 10d of the deformation of spherical resonant cavity 10c and the 4th
It deforms spherical waveguide resonant cavity 10b and third and deforms coupling direction between spherical resonant cavity 10c and rotated clockwise 90 °, and the 4th
Coupling direction is again relative to third shape-changeable ball between deforming the spherical waveguide resonant cavity 10e of the deformation of spherical waveguide resonant cavity 10d and the 5th
Coupling direction is rotated by 90 ° counterclockwise between the spherical waveguide resonant cavity 10d of the deformation of shape resonant cavity 10c and the 4th, is dropped using the above structure
The low stiffness of coupling of higher mode TM211, to further improve the Out-of-band rejection effect of filter.
It first wave guide ring flange 30 and second waveguide ring flange 40 and deforms spherical 10 junction of waveguide resonant cavity and opens up the
Two rectangle coupling windows, the center of the second rectangle coupling window and the center of the first coupling window are located at same straight line, the second rectangle coupling
That closes window is greater than the first coupling window.
Based on the spherical waveguide of the spherical deformation of waveguide resonant cavity 10a and second of the first deformation for deforming spherical resonant cavity filter
It is round coupling window, a diameter of d12=11.515mm between resonant cavity 10b；The spherical waveguide resonant cavity 10b of second deformation and third
Deforming between spherical waveguide resonant cavity 10c is round coupling window, and a diameter of d23=10.325mm, it is humorous that third deforms spherical waveguide
The chamber 10c and the 4th that shakes is round coupling window between deforming spherical waveguide resonant cavity 10d, a diameter of d34=10.141mm, and the 4th becomes
It is round coupling window between the spherical waveguide resonant cavity 10e of the deformation of the spherical waveguide resonant cavity 10d of shape and the 5th, a diameter of d45=
11.739mm。
The first spherical waveguide resonant cavity 10a of deformation based on the spherical resonant cavity filter of deformation is by radius Rr1=
It is the spherical resonant cavity of deformation that R21=17.259mm is obtained, cup depth dr1 that the spherical cavity resonator of 11.489mm, which subtracts radius,
=4.125mm；The second spherical waveguide resonant cavity 10b of deformation is to subtract radius by the spherical cavity resonator of radius Rr2=11.924mm
The deformation spherical resonator A, cup depth dr2=4.080mm obtained for R22=14.35mm；The 4th spherical waveguide of deformation is humorous
Vibration chamber 10d be subtracted by the spherical cavity resonator of radius Rr4=11.629mm radius be R24=13.546mm obtain deformation it is spherical
Resonant cavity, cup depth dr4=4.740mm；The 4th spherical waveguide resonant cavity 10d of deformation is by radius Rr5=12.088mm
Spherical cavity resonator subtract radius be R25=16.308mm obtain the spherical resonant cavity of deformation, cup depth dr5=
2.318mm；It is R23=that third, which deforms spherical waveguide resonant cavity and subtracts radius by the spherical cavity resonator of radius Rr3=11.129mm,
Cross bath, cup depth dr3=6.096mm, deformation are opened up on the basis of the spherical resonant cavity of deformation that 14.592mm is obtained
Cross bath is opened in spherical resonant cavity top and bottom, and opened cross bath is that two mutually perpendicular rectangular channels are constituted, the square
The size of shape slot is 16mm × 1.5mm；Described utilizes the spherical resonance of deformation based on the filter for deforming spherical waveguide resonant cavity
Chamber improves higher mode frequency, broader without spuious stopband to obtain；The cup depth for respectively deforming spherical waveguide resonant cavity is different, i.e.,
The higher mode for respectively deforming spherical waveguide resonant cavity is different, to destroy the spuious passband of filter stop bend；In addition,
The cross bath of the top and bottom Depression Centers of the three spherical waveguide resonant cavities 10 of deformation falls higher mode radiation loss, further
Improve the Stopband Performance of filter, and the arrangement mode of five resonant cavities of filter C, the two poles of the earth in filter cavity
Simultaneously higher mode TM102 and TM201 exist abbreviation.
Figure 10 provides three kinds of filter A, filter B and filtering based on spherical waveguide resonator for the embodiment of the present invention
Device C simulation result, wherein filter A is the filter based on ideal spherical (undeformed) waveguide resonant cavity, filter B be based on
The filter of spherical resonant cavity 10 is deformed, filter C is that spherical waveguide resonant cavity 10c and the spherical waveguide of deformation are deformed based on third
The filter of resonant cavity 10；The filter A and filter B structure is similar with filter C overall structure；It is described based on change
The filter C simulation result of the spherical waveguide resonator of shape；Filter works in X-band, centre frequency 10GHz, and bandwidth is
5%, passband internal loss is 0.2-0.3dB, is greater than 20dB with interior return loss, and have more than 34dB in the filter Wide stop bands
Band stray inhibitory effect.
By the simulation result comparison of filter A, filter B and filter C it is found that the filter A frequency response
Simulation result have spuious passband at 13.8GHz, 16.6GHz and 18GHz, and spurious signal is stronger, the filtering
The simulation result of device B frequency response still has stronger spuious at 15.6GHz and 17GHz, it is known that the spuious passband of filter B is filter
What the spuious passband of wave device A was formed to high frequency offset, filter B has wider without spuious stopband, the filtering with respect to filter A
The simulation result of device C frequency response still has a spuious presence at 15.6GHz and 17GHz, but the spurious reduction effect of filter C
The improvement of 34dB is had more than relative to filter A and filter B.
The filter C is processed using 3D printing technique, due to needing a large amount of support constructions in print procedure, and is attached to
The support construction of lower surface is difficult to remove completely, thus the degree of roughness for its lower surface of device printed much higher than upper surface and
Side, the Q-unloaded that will lead to device if needing the lower surface of support to be in device inside described in deteriorates, therefore is filtering
In the design of wave device, need to avoid this downward table by appropriately designed filter construction and correct selection 3D printing direction
Face, so that the performance of filter due to caused by technique be avoided to deteriorate.
It is processed using 3D printing technique, the side of filter C is printed as basal plane, when printing is arranged several first
Supporting element 5 and the second supporting element 6,5 top surface of the first supporting element are set as cambered surface, and the shape difference of the cambered surface is corresponding
The spherical waveguide resonant cavity 10 of deformation and third deform the matching of spherical waveguide resonant cavity surface shape；Second supporting element, 6 surface is
Inclined-plane, the second supporting element 6 are used to support first wave guide ring flange 30 and second waveguide ring flange 40；The side of filter C refers to
On the basis of the spherical waveguide resonant cavity of third deformation, the face for opening cross recess is plane where top and bottom, with the cross recess
Vertical face is side.
It is filtering that Figure 11, which provides a kind of Wide stop bands rejects trap based on spherical waveguide resonator for the embodiment of the present invention,
Device C, the filter C are in the 3D printing method schematic diagram at 45 ° of inclinations angle；By taking the second spherical waveguide resonant cavity 10b of deformation as an example,
The relative position of device inside lower surface and upper surface is provided, wherein the first supporting element 5 is the support in filter C process
Body, third deforms the top surface of spherical waveguide resonant cavity and the 4th spherical waveguide resonant cavity 10d of deformation to filter C in process
It is coupled window substitution, reduces required lower surface support construction, to make processed filter that there is higher no-load
Quality factor reduce the pass-band loss of filter.
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 spherical waveguide resonator of deformation, which is characterized in that including deforming spherical waveguide resonant cavity (10), first wave inducing defecation by enema and suppository
Blue disk (30) and second waveguide ring flange (40), deforming spherical waveguide resonant cavity (10) is that bottom and top are equipped with spherical depression
The spherical waveguide resonant cavity of deformation；First wave guide ring flange (30) and second waveguide ring flange (40) are parallel to the spherical waveguide of deformation
The line of spherical depression center of deformation is provided at the top and bottom of resonant cavity (10)；First wave guide ring flange (30) and second
Waveguide flange (40) is parallel to each other, and deforms spherical waveguide resonant cavity (10) and first wave guide ring flange (30) and second waveguide method
The first coupling window (101) and the second coupling window (102) are opened up at the coupling of blue disk (40).
2. the spherical waveguide resonator of deformation according to claim 1, which is characterized in that with the spherical waveguide resonant cavity of deformation
(10) depth of spherical depression deformation increases, and the radius for deforming spherical waveguide resonant cavity (10) reduces.
3. the spherical waveguide resonator of deformation according to claim 1, which is characterized in that the first coupling window (101) and second
Coupling window (102) is rectangle coupling window, and the long side of the first coupling window (101) and the second coupling window (102) is perpendicular to shape-changeable ball
The top and bottom spherical depression center of deformation line of shape resonator (10).
4. the spherical waveguide resonator of deformation according to claim 1, which is characterized in that deform spherical waveguide resonant cavity (10)
Rectangular channel is opened up on the spherical depression deformation plance of bottom surface and top surface, the long side of the rectangular channel is parallel to first wave guide ring flange
(30) it is overlapped with second waveguide ring flange (40), the center of the rectangular channel with the center of spherical depression deformation plance.
5. the spherical waveguide resonator of deformation according to claim 1, which is characterized in that first wave guide ring flange (30) and the
It is provided with boss at the coupling of two waveguide flanges (40) and the spherical waveguide resonant cavity (10) of deformation, deforms spherical waveguide resonant cavity
(10) it is embedded in the boss.
6. the spherical waveguide resonator of deformation according to claim 1, which is characterized in that deform spherical waveguide resonant cavity (10)
Cross bath is opened up on the spherical depression deformation plance of bottom surface and top surface；The center of the cross bath and spherical depression deformation plance
Center be overlapped；The cross bath includes two and is mutually perpendicular to the rectangular channel intersected, and the long side of one of rectangular channel is parallel
In first wave guide ring flange (30).
7. a kind of filter based on the spherical waveguide resonator of deformation described in claim 6, which is characterized in that spherical including deforming
Waveguide resonant cavity (10), first wave guide ring flange (30) and second waveguide ring flange (40)；Wherein, spherical waveguide resonant cavity is deformed
(10) there are five setting, i.e., the spherical waveguide resonant cavity (10a) of the first deformation, the spherical waveguide resonant cavity (10b) of the second deformation, third
Deform spherical waveguide resonant cavity (10c), the spherical waveguide resonant cavity (10d) of the 4th deformation and the 5th spherical waveguide resonant cavity of deformation
(10e)；The spherical waveguide resonant cavity (10a) of first deformation connect with first wave guide ring flange (30), the 5th deformation spheric wave
Lead resonant cavity (10e) and second waveguide ring flange (40) connection；The second spherical waveguide resonant cavity (10b) of deformation becomes with first respectively
The spherical waveguide resonant cavity of shape (10a) and third deform spherical waveguide resonant cavity (10c) coupling；The 4th spherical waveguide resonant cavity of deformation
(10d) deforms spherical waveguide resonant cavity (10c) with the spherical waveguide resonant cavity (10e) of the 5th deformation and third respectively and couples；Wherein
The top and bottom that third deforms spherical waveguide resonant cavity (10c) open up cross bath；
The coupling direction of the second spherical waveguide resonant cavity (10b) of deformation and the first spherical waveguide resonant cavity (10a) of deformation perpendicular to
The spherical waveguide resonant cavity (10b) of second deformation and third deform the coupling direction of spherical waveguide resonant cavity (10c)；
Third deform the coupling direction of spherical waveguide resonant cavity (10c) and the 4th spherical waveguide resonant cavity (10d) of deformation perpendicular to
The spherical waveguide resonant cavity (10b) of second deformation and third deform the coupling direction of spherical waveguide resonant cavity (10c)；
Third deform the coupling direction of spherical waveguide resonant cavity (10c) and the 4th spherical waveguide resonant cavity (10d) of deformation perpendicular to
The spherical waveguide resonant cavity (10d) of 4th deformation and the 5th spherical waveguide resonant cavity of shape (10e).
8. according to claim 7 based on the filter for deforming spherical waveguide resonator, which is characterized in that third shape-changeable ball
The spherical surface that the spherical depression deforming depth of shape waveguide resonant cavity (10c) is greater than remaining the four spherical waveguide resonant cavities (10) of deformation is recessed
Notch distortion depth.
9. according to claim 7 based on the filter for deforming spherical waveguide resonator, which is characterized in that the first shape-changeable ball
It is round coupling window between shape waveguide resonant cavity (10a) and the second spherical waveguide resonant cavity (10b) of deformation；
It is round coupling window that the spherical waveguide resonant cavity (10b) of second deformation and third, which deform between spherical waveguide resonant cavity (10c),；
It is round coupling window that third, which deforms between spherical waveguide resonant cavity (10c) and the 4th spherical waveguide resonant cavity (10d) of deformation,；
It is round coupling window between the spherical waveguide resonant cavity (10d) of 4th deformation and the 5th spherical waveguide resonant cavity (10e) of deformation.
10. a kind of processing method as claimed in claim 7 based on the filter for deforming spherical waveguide resonator, feature exist
In being processed using 3D printing technique, the side of filter printed as basal plane, several first supporting elements are arranged in when printing
(6) and the second supporting element (7), the first supporting element (6) top surface are set as cambered surface, and the shape difference of the cambered surface is corresponding
The spherical waveguide resonant cavity of deformation (10) and third deform the matching of spherical waveguide resonant cavity (10c) surface shape；Second supporting element
(7) surface is inclined-plane, and the second supporting element (7) is used to support first wave guide ring flange (30) and second waveguide ring flange (40).
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| CN111987403A (en) * | 2020-07-10 | 2020-11-24 | 深圳大学 | Geometric shaping microwave resonator |
| CN112952326A (en) * | 2021-03-05 | 2021-06-11 | 电子科技大学 | Spherical cavity waveguide band-pass filter of 3D printing X-waveband CT structure and manufacturing method |
| CN113258234A (en) * | 2021-04-16 | 2021-08-13 | 深圳大学 | Resonant cavity waveguide filter |
| CN113644396A (en) * | 2021-07-06 | 2021-11-12 | 广东盛路通信科技股份有限公司 | Four-mode four-pass band filter based on hemispherical resonant cavity |
| CN115117581A (en) * | 2022-07-19 | 2022-09-27 | 电子科技大学 | High no-load Q value filtering power divider based on 3D printing |
| CN116315539A (en) * | 2022-09-29 | 2023-06-23 | 西安空间无线电技术研究所 | High-power cavity filter easy for 3D printing |
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| CN111987403A (en) * | 2020-07-10 | 2020-11-24 | 深圳大学 | Geometric shaping microwave resonator |
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| CN113644396A (en) * | 2021-07-06 | 2021-11-12 | 广东盛路通信科技股份有限公司 | Four-mode four-pass band filter based on hemispherical resonant cavity |
| CN115117581A (en) * | 2022-07-19 | 2022-09-27 | 电子科技大学 | High no-load Q value filtering power divider based on 3D printing |
| CN115117581B (en) * | 2022-07-19 | 2023-08-22 | 电子科技大学 | Filtering power divider with high unloaded Q value based on 3D printing |
| CN116315539A (en) * | 2022-09-29 | 2023-06-23 | 西安空间无线电技术研究所 | High-power cavity filter easy for 3D printing |
| CN116315539B (en) * | 2022-09-29 | 2024-05-31 | 西安空间无线电技术研究所 | High-power cavity filter easy for 3D printing |
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