CN104362416B - Truncate metal membrane with elliptical holes and E-plane waveguide filter composed of truncate metal membrane with elliptical holes - Google Patents
Truncate metal membrane with elliptical holes and E-plane waveguide filter composed of truncate metal membrane with elliptical holes Download PDFInfo
- Publication number
- CN104362416B CN104362416B CN201410699899.0A CN201410699899A CN104362416B CN 104362416 B CN104362416 B CN 104362416B CN 201410699899 A CN201410699899 A CN 201410699899A CN 104362416 B CN104362416 B CN 104362416B
- Authority
- CN
- China
- Prior art keywords
- metallic membrane
- elliptical aperture
- waveguide
- elliptical
- metal membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a truncate metal membrane with elliptical holes and an E-plane waveguide filter composed of the truncate metal membrane with the elliptical holes. The truncate metal membrane with the elliptical holes comprises a rectangular metal membrane body, wherein the four elliptical holes are formed in the metal membrane body, the long axis of each elliptical hole is a, the short axis of each elliptical hole is b, the value of b is smaller than or equal to the length of each wide edge of the metal membrane body, the four elliptical holes sequentially include the elliptical hole A, the elliptical hole B, the elliptical hole C and the elliptical hole D, a left crack is formed in the left end of the metal membrane body and is communicated with the elliptical hole A, a right crack is formed in the right end of the metal membrane body and is communicated with the elliptical hole D, the portion, on the left side of the elliptical hole, of the metal membrane body forms a front truncate metal membrane part, and the portion, on the right side of the elliptical hole D, of the metal membrane body forms a rear truncate metal membrane part. Compared with the prior art, the truncate metal membrane with the elliptical holes and the E-plane waveguide filter composed of the truncate metal membrane with the elliptical holes have the advantages that the number of passband ripples is smaller, and the high-frequency rejection performance is better.
Description
Technical field
The present invention relates to microwave filter field, the E faces waveguide that elliptical aperture blocks metallic membrane and its composition is specifically referred to
Wave filter.
Background technology
Wave filter plays an important roll as frequency selective element in current communication system, is also high-frequency microwave circuit
Indispensable important component.The bandpass filter commonly used in microwave, millimeter involve Terahertz circuit now is all base
In the waveguide filter that waveguide transmission element is realized, particularly E faces Mental Septum Waveguide Filter has simple structure because of it, easily
In processing and install, it is easy to produce in batches, obtain widely the advantages of can obtain Q values higher and good filtering characteristic
Using.Make on coupling metal with the field parallel in waveguide because it couples metal for common E faces metallic membrane wave filter
The smaller coupling made between resonator of current value it is smaller, the high-frequency suppressing performance of wave filter when resonator number is less
It is less desirable with ripple in band.And E faces metallic membrane wave filter because its diaphragm thickness machining accuracy problem high band should
Used time has difficult processing, mismachining tolerance is big, uniformity is poor etc., and some are class.It is to obtain relatively good wave filter in high band
Performance, the first order metallic membrane length of the metallic membrane in the iris waveguide filter of E faces will generally take the value of very little, and this is caused
Processing difficulties and material object differ larger with simulation result, and with frequency increase metallic membrane length it is smaller, first order metal film
The length of piece cannot be processed.Common E faces metallic membrane wave filter its high-frequency suppressing performance when resonator number is less
It is poor to increase resonator number to increase its performance need, but resonator number increases the performance of postfilter to parameters
Value it is more sensitive be more difficult design and simulation, and processing uniformity it is poor.
Microwave filter is the critical elements for various different frequency signals separately or in combination in microwave system, in microwave
Have in relay communication, satellite communication, radar, electronic countermeasure and microwave measurement instrument and be extremely widely applied.It is each in order to meet
Different purposes are planted, the microwave filter of numerous species is occurred in that.Past, using perceptual metallic rod and transverse direction more than bandpass filter
Diaphragm structure, not only complex structure be unfavorable for integrated, and be more expensive to manufacture, should not produce in enormous quantities, in millimere-wave band especially
So.Konishi in 1974 propose the rectangle wave guide bandpass wave filter being made up of E facial mask pieces first, due to this filtering
Utensil have simple structure, it is easily manufactured and installed, be easy to batch production, Q values and good filtering characteristic higher can be obtained
The advantages of, thus obtain a wide range of applications.Thereafter, in structure, except all-metal is inserted, the list that also dielectric substrate is made
Various E faces structure shapes such as lateral fin line, bilateral fin lines and the insertion of bimetal strip band, biasing diaphragm, deformation waveguide, high-temperature superconductor
The wave filter of formula.
Compared with fin line is inserted, the insertion of all-metal piece has less insertion loss and higher due to the influence without medium
Q values, and precision very high can be reached to the processing of sheet metal now, thus sheet metal E faces wave filter is able to extensively
Using.But, when bandwidth increases, because the first order for needing stronger coupling, monometallic diaphragm just becomes very thin, work as bandwidth
It is required that when reaching certain degree, machining accuracy and mechanical strength will be unable to meet the demand of design and use, will run into plus
Difficulty in work.The stopband characteristic of other these structures is simultaneously unsatisfactory, and the belt resistance inhibitor system of particularly high band is poor, is being permitted
Multipair stopband characteristic requirement occasion higher, such as wave filter in duplexer, are difficult to meet corresponding index.To solve these
Problem proposes substantial amounts of designed concept, wherein relatively effective one kind is that wave filter is designed using double Diaphragm Methods, but uses
Processing and assembling can be made after bimodulus piece becomes difficult, and is still present that first order metal is too short to ask when requiring wide band
Topic.
Such as Patent No.：201020607942. 3 Ka wave band E faces longitudinal direction diaphragmatic waveguide wave filter.As schemed
1, structure, have five resonators in metallic membrane, numbering is respectively 202,204,206,208,210, five
The length of resonator is identical, and the width ecto-entad of five resonators increases successively, wherein the width of resonator 202 and 210
Degree is consistent, and width of the resonator 204 with 208 is consistent, and the width of resonator 206 is maximum.Five resonators form six altogether
Bar coupling mechanism, numbering is followed successively by 201,203,205,207,209,211, six length phases of coupling mechanism
Together, the width ecto-entad of six coupling mechanisms increases successively, and wherein width of the coupling mechanism 201 with 211 is consistent, coupling
Width of the mechanism 203 with 209 is consistent, and width of the coupling mechanism 205 with 207 is consistent.Coupling mechanism 201 in Fig. 1
The first order metal described in us is with 211, it can be seen that the width of coupling mechanism 201 and 211 is coupled than other
The width of mechanism is much smaller, to improve the performance need of wave filter by the in the design of common E faces metallic membrane wave filter
The length of one-level metallic membrane（The width of coupling mechanism 201 and 211）The very little of design, particularly in the high band of microwave
Low frequency segment length with Terahertz is smaller, and this processing for making is difficult（Precision is not reached）, and due to first order metallic membrane length
It is too small that the excessive performance impact to wave filter of mismachining tolerance can be made larger.Waveguide filter is due to smaller, the film in high band size
The length and thickness of piece also reduce therewith, and this can make metallic membrane flexible type, unstable.
The shortcoming of prior art is：Existing E faces diaphragm filter can reduce with the size of the liter high filter of frequency,
The overall dimensions of E faces metal can also reduce, and particularly the first order metallic membrane of E facial masks piece reduces more acutely, in high band
The too short not easy processing of first order metallic membrane length, due to primary diaphragm control energy coupling its performance shadow to wave filter
Ring very big, too short length can make processing uniformity be deteriorated.Too small metallic membrane size can make metallic membrane flexible type unstable
It is fixed.
The content of the invention
It is an object of the invention to provide the E faces waveguide filter that elliptical aperture blocks metallic membrane and its composition, it is used to solve
The certainly too short problem of first order metallic membrane, reaches convenient making, with interior ripple is smaller, the more preferable purpose of high-frequency suppressing performance.
Implementation of the invention is as follows：Elliptical aperture blocks metallic membrane, including a metallic membrane for rectangle, is provided with one
The individual Y-axis parallel with metal film length of a film side, is provided with a Z axis parallel with metallic membrane broadside, metallic membrane be provided with 4 it is ellipse
Manhole, 4 ellipse holes are arranged in a straight line along Y direction, and the major axis of ellipse hole is a, the short axle of ellipse hole
It is b, the width edge length of the value less than or equal to metallic membrane of b, on metallic membrane left end to right-hand member direction, 4 ellipses
Through hole respectively is elliptical aperture A, elliptical aperture B, elliptical aperture C, elliptical aperture D, and the left end of metallic membrane is provided with left crack, a left side and splits
Seam is connected with elliptical aperture A, and left crack is the elongate slot that extreme direction extends to the right by the left end of metallic membrane, metallic membrane
Right-hand member be provided with right crack, right crack connects with elliptical aperture D, and right crack is the extreme direction to the left by the right-hand member of metallic membrane
The elongate slot of extension；Metallic membrane on the left of elliptical aperture A blocks metallic membrane, the metallic membrane on the right side of elliptical aperture D before being formed
Metallic membrane is blocked after formation, the metallic membrane between elliptical aperture A and elliptical aperture B forms first and couples metallic membrane, elliptical aperture B
Second is formed with the metallic membrane between elliptical aperture C couple metallic membrane, the metallic membrane shape between elliptical aperture C and elliptical aperture D
Into the 3rd coupling metallic membrane.
It is to obtain relatively good performance of filter, the metal film in the Mental Septum Waveguide Filter of common E faces in high band
The first order metallic membrane length of piece will generally take the value of very little, this cause processing difficulties and it is in kind differed with simulation result compared with
Greatly, and as frequency increases metallic membrane length is smaller, and the length of first order metallic membrane cannot be processed.To solve the first gold medal
Belong to the length issue of diaphragm, present invention uses unit is blocked, first order metallic membrane is blocked from centre.In the present invention,
Before block metallic membrane and after block the first order metallic membrane referred in metallic membrane as background of invention, the present invention
In due to using oval through hole and to preceding block metallic membrane and after block metallic membrane and carry out perforate setting, will preceding block
Metallic membrane blocks metallic membrane and is blocked from centre with after, left crack and right crack is formed, so that preceding section in the present invention
Disconnected metallic membrane blocks the size that metallic membrane can be accomplished to grow very much with after, thus can conveniently be processed, it is easy to install life
Produce.The convenient making of rectangular metal diaphragm is set to, production cost is reduced.
In said structure, standard waveguide is standard rectangular waveguide WR-10, and its transmission frequency is 75GHz to 110GHz, mark
Used as transmission waveguide, signal is input into Quasi-Waveguide by its two ends, output；Wherein metallic membrane with 0.1mm thick copper metallic plate, its
He can also use sheet metal, and ellipse hole is to corrode the through hole for obtaining on metallic membrane, and separate metallic membrane will
Standard waveguide is divided into resonator and loading waveguide, and resonator control resonant frequency is the centre frequency of wave filter, loading waveguide
In metallic membrane control coupling realize filter function；Wherein before block metallic membrane and after block in the middle of metallic membrane and be hollowed out
Upper and lower two symmetrical metallic membranes are constituted, area of knockout is referred to as left crack and right crack, and middle left crack and the right side is split
Seam can increase field coupling amount and reach the effect that can reach similar short metal, and the length of first order metallic membrane is increased with this,
The length that metallic membrane blocks metallic membrane with after is blocked before increased；Wherein ellipse hole can be formed as hollow structure
Resonator, the structure of ellipse hole makes the electric current formed by waveguide internal electric field on metallic membrane have loop configuration, so
Metallic membrane can be increased increases coupling amount to the control effect of field；Coupling metallic membrane includes the first above-mentioned coupling metal film
Piece, the second coupling metallic membrane, the 3rd coupling metallic membrane, wherein coupling metallic membrane cascades resonator as coupled structure
Shaping filter；Wherein metallic membrane be symmetrical structure, ellipse hole it is in the same size；Wherein using metallic membrane as
When overall, it is 1/2nd of standard waveguide, two that standard waveguide is divided into two its width of small rectangular waveguide by metallic membrane
Small rectangular waveguide is by this metallic membrane and connects, and two small rectangles are blocked at coupling metallic membrane, two at ellipse hole
Small rectangular waveguide is directly connected to constitute resonator, and its size has ellipse hole control.
Also include upper bracket plate and lower carriage plate, metallic membrane is clamped between upper bracket plate and lower carriage plate, upper bracket
Plate is connected on the side long of the upside of metallic membrane, and lower carriage plate is connected on the side long of the downside of metallic membrane, the axle of upper bracket plate
The axis of line and lower carriage plate is parallel with Y-axis.Upper bracket plate and lower carriage plate are as supporting construction outside standard waveguide cavity
Face is not involved in filtering and realizes that supporting construction and metallic membrane are used as an overall processing.
By after the setting of said structure, the value of short axle b is：1mm to 2mm, specific value can be：1mm or
1.27mm or 1.5mm or 1.8mm, the value of major axis a is：1mm to 2mm, specific value can be：1mm or 1.27mm or 1.5mm
Or 1.8mm or 1.66mm.
4 ellipse holes are all standard oval through hole.
Spacing is P between elliptical aperture A and elliptical aperture B, and spacing between elliptical aperture C, elliptical aperture D is also P, elliptical aperture B with
Spacing between elliptical aperture C is more than P.
By after the setting of said structure, it is preceding block metallic membrane and after block the length of metallic membrane and can accomplish following
Reference value.Before block metallic membrane left end to the distance of elliptical aperture A central points and be：1.5mm to 2.5mm, specific value can be：
1.5mm or 1.8mm or 1.93mm or 2.3mm or 2.5mm.The distance of metallic membrane right-hand member to elliptical aperture D central points is blocked afterwards
For：1.5mm to 2.5mm, specific value can be：1.5mm or 1.8mm or 1.93mm or 2.3mm or 2.5mm.
When elliptical aperture being blocked into metallic membrane being applied in waveguide filter, there is the E faces waveguide filter of following structure：Base
The E faces waveguide filter of metallic membrane, including a hollow standard waveguide are blocked in elliptical aperture, described elliptical aperture blocks gold
In the cavity of standard waveguide, the input port of standard waveguide is to set along the Y direction to output port direction to category diaphragm arrangement,
Before block the left end of metallic membrane just to the input port of standard waveguide, after block the right-hand member of metallic membrane just to standard waveguide
Output port；The upside side long of metallic membrane flushes with the upper inwall of standard waveguide, downside side long and the standard ripple of metallic membrane
The lower inwall led is flushed.
Common E faces rectangular waveguide filter is using the metallic membrane parallel with E faces of the insertion in rectangular waveguide.Metal film
Piece is processed into the square opening with certain intervals, and is clipped in the middle of waveguide.Material is thus formed one section of empty waveguide, one section of film
The alternating structure of piece waveguide.Wherein, equivalent to coupling is played, empty waveguide just constitutes resonator to diaphragm between two adjacent diaphragms,
Diaphragm is equivalent into T-shaped circuit.Horizontal diaphragm can be analyzed as the perturbation of resonator as common resonator chamber.Due to waveguide one
As be all main mould work, then TE10 moulds can only encourage TEm0 moulds near Waveguide Discontinuities, it is impossible to encouraged TEmn (n ≠
0) mould and TMmn moulds.
In the present invention due to introduce ellipse hole structure make on metallic membrane produce field not with waveguide E face
Parallel but in ellipse hole border two semi-circular electric currents of formation thus cause other patterns in the center of waveguide
Field.
The metallic membrane that blocks has scenario described below with the assembling mode of standard waveguide：
Situation 1：The standard waveguide includes left half groove and right half groove of symmetrical connection, the notch of left half groove towards
Right half groove, towards left half groove, also including upper bracket plate and lower carriage plate, metallic membrane is clamped in the notch direction of right half groove
Between upper bracket plate and lower carriage plate, upper bracket plate is connected on the side long of the upside of metallic membrane, and lower carriage plate is connected to gold
Belong on the downside side long of diaphragm, the axis of upper bracket plate and the axis of lower carriage plate are parallel with Y-axis, upper bracket plate and lower carriage
Plate is clamped between left half groove and right half groove.
Advantages of the present invention has：
1st, the interior ripple of the band of the invention is smaller compared to existing technology, high-frequency suppressing performance is more preferable.The present invention is by E facial masks
Elliptical hole is introduced in piece, the improvement to performance of filter is realized in the coupling in increase wave filter between resonator.
2nd, compared to existing technology the processing of the invention be easier, uniformity it is more preferable.Metallic membrane unit is blocked with E faces to replace
Comparing short first order metallic membrane is more prone to processing, and in kind and simulation result can be made under identical machining accuracy more
It is close.
Brief description of the drawings
Fig. 1 is prior art metallic membrane schematic diagram.
Cut open structural representation in the side that Fig. 2 is loaded into standard waveguide for metallic membrane.
Fig. 3 is loaded into the end view in standard waveguide for metallic membrane.
Fig. 4 is the current phasor figure on metallic membrane.
Fig. 5 is that traditional diaphragm is equivalent into T-shaped circuit diagram.
Fig. 6 is E faces waveguide filter simulation parameter schematic diagram.
Fig. 7 blocked before being metallic membrane and after block metal film when metallic membrane is not provided with crack using elliptical hole
Piece.
Fig. 8 is the E faces waveguide filter simulation parameter schematic diagram of Fig. 7
Label in figure is expressed as：1st, standard waveguide；2nd, upper bracket plate；3rd, it is preceding to block metallic membrane；4th, elliptical aperture
A；5th, the first coupling metallic membrane；6th, elliptical aperture B；7th, the second coupling metallic membrane；8th, elliptical aperture C；12nd, the 3rd coupling metal film
Piece；9th, elliptical aperture D；10th, metallic membrane is blocked after；11st, lower carriage plate.
Specific embodiment
Embodiment one
As shown in Figures 1 to 6.
Elliptical aperture blocks metallic membrane, including a metallic membrane for rectangle, be provided with one it is parallel with metal film length of a film side
Y-axis, be provided with a Z axis parallel with metallic membrane broadside, metallic membrane is provided with 4 ellipse holes, and 4 ellipses lead to
Hole is arranged in a straight line along Y direction, and the major axis of ellipse hole is a, and the short axle of ellipse hole is b, and the value of b is less than or equal to
The width edge length of metallic membrane, on metallic membrane left end to right-hand member direction, 4 ellipse holes respectively be elliptical aperture
A4, elliptical aperture B6, elliptical aperture C8, elliptical aperture D9, the left end of metallic membrane are provided with left crack, left crack and elliptical aperture A4 and connect
Logical, left crack is the elongate slot that extreme direction extends to the right by the left end of metallic membrane, and the right-hand member of metallic membrane is provided with
Right crack, right crack connects with elliptical aperture D9, and right crack is the long and narrow of the extreme direction extension to the left by the right-hand member of metallic membrane
Gap；Metallic membrane on the left of elliptical aperture A4 blocks metallic membrane 3 before being formed, the metallic membrane on the right side of elliptical aperture D9 cuts after being formed
Disconnected metallic membrane 10, the metallic membrane between elliptical aperture A4 and elliptical aperture B6 forms first and couple metallic membrane 5, elliptical aperture B6 and
Metallic membrane between elliptical aperture C8 forms second and couples metallic membrane 7, the metallic membrane between elliptical aperture C8 and elliptical aperture D9
Form the 3rd coupling metallic membrane 12.
It is to obtain relatively good performance of filter, the metal film in the Mental Septum Waveguide Filter of common E faces in high band
The first order metallic membrane length of piece will generally take the value of very little, this cause processing difficulties and it is in kind differed with simulation result compared with
Greatly, and as frequency increases metallic membrane length is smaller, and the length of first order metallic membrane cannot be processed.To solve the first gold medal
Belong to the length issue of diaphragm, present invention uses unit is blocked, first order metallic membrane is blocked from centre.In the present invention,
Before block metallic membrane 3 and after block metallic membrane 10 and be the first order metallic membrane that refers in background of invention, this
In invention due to using oval through hole and to preceding block metallic membrane 3 and after block metallic membrane 10 and carry out perforate setting,
To preceding block metallic membrane 3 and after block metallic membrane 10 and blocked from centre, left crack and right crack are formed, so that this hair
Metallic membrane 3 is blocked before in bright and blocks the size that metallic membrane 10 can be accomplished to grow very much with after, thus can conveniently be added
Work, it is easy to install production.The convenient making of rectangular metal diaphragm is set to, production cost is reduced.
In said structure, standard waveguide is standard rectangular waveguide WR-10, and its transmission frequency is 75GHz to 110GHz, mark
Used as transmission waveguide, signal is input into Quasi-Waveguide by its two ends, output；Wherein metallic membrane with 0.1mm thick copper metallic plate, its
He can also use sheet metal, and ellipse hole is to corrode the through hole for obtaining on metallic membrane, and separate metallic membrane will
Standard waveguide is divided into resonator and loading waveguide, and resonator control resonant frequency is the centre frequency of wave filter, loading waveguide
In metallic membrane control coupling realize filter function；Wherein before block metallic membrane and after block in the middle of metallic membrane and be hollowed out
Upper and lower two symmetrical metallic membranes are constituted, area of knockout is referred to as left crack and right crack, and middle left crack and the right side is split
Seam can increase field coupling amount and reach the effect that can reach similar short metal, and the length of first order metallic membrane is increased with this,
The length that metallic membrane blocks metallic membrane with after is blocked before increased；Wherein ellipse hole can be formed as hollow structure
Resonator, the structure of ellipse hole makes the electric current formed by waveguide internal electric field on metallic membrane have loop configuration, so
Metallic membrane can be increased increases coupling amount to the control effect of field；Coupling metallic membrane includes the first above-mentioned coupling metallic membrane
5th, the second coupling metallic membrane, the 3rd coupling metallic membrane, wherein coupling metallic membrane cascades resonator as coupled structure
Shaping filter；Wherein metallic membrane be symmetrical structure, ellipse hole it is in the same size；Wherein using metallic membrane as
When overall, it is 1/2nd of standard waveguide, two that standard waveguide is divided into two its width of small rectangular waveguide by metallic membrane
Small rectangular waveguide is by this metallic membrane and connects, and two small rectangular waveguides are blocked at coupling metallic membrane, at ellipse hole
Two small rectangular waveguides are directly connected to constitute resonator, and its size has ellipse hole control.
Also include upper bracket plate 2 and lower carriage plate 11, metallic membrane is clamped between upper bracket plate 2 and lower carriage plate 11,
Upper bracket plate 2 is connected on the side long of the upside of metallic membrane, and lower carriage plate 11 is connected on the side long of the downside of metallic membrane, upper branch
The axis of frame plate 2 and the axis of lower carriage plate 11 are parallel with Y-axis.Upper bracket plate 2 and lower carriage plate 11 exist as supporting construction
Standard waveguide cavity outside is not involved in filtering and realizes that supporting construction and metallic membrane are used as an overall processing.
By after the setting of said structure, the value of short axle b is：1mm to 2mm, specific value can be：1mm or
1.27mm or 1.5mm or 1.8mm, the value of major axis a is：1mm to 2mm, specific value can be：1mm or 1.27mm or 1.5mm
Or 1.8mm or 1.66mm.
4 ellipse holes are all standard oval through hole.
Spacing is P between elliptical aperture A4 and elliptical aperture B6, and the spacing between elliptical aperture C8, elliptical aperture D9 is also P, elliptical aperture
Spacing between B and elliptical aperture C8 is more than P.
By after the setting of said structure, it is preceding block metallic membrane and after block the length of metallic membrane and can accomplish following
Reference value.Before block metallic membrane left end to the distance of elliptical aperture A central points and be：1.5mm to 2.5mm, specific value can be：
1.5mm or 1.8mm or 1.93mm or 2.3mm or 2.5mm.The distance of metallic membrane right-hand member to elliptical aperture D central points is blocked afterwards
For：1.5mm to 2.5mm, specific value can be：1.5mm or 1.8mm or 1.93mm or 2.3mm or 2.5mm.
Embodiment 2
As shown in Figures 1 to 6.
When the elliptical aperture of embodiment 1 being blocked into metallic membrane being applied in waveguide filter, there is the E faces waveguide of following structure
Wave filter：The E faces waveguide filter of metallic membrane, including a hollow standard waveguide 1, embodiment 1 are blocked based on elliptical aperture
Described elliptical aperture blocks metallic membrane and is arranged in the cavity of standard waveguide, the input port of standard waveguide to output port side
To being to set along the Y direction, the preceding left end for blocking metallic membrane just to the input port of standard waveguide, after block metallic membrane
Right-hand member is just to the output port of standard waveguide；The upside side long of metallic membrane flushes with the upper inwall of standard waveguide, metallic membrane
Downside side long flushed with the lower inwall of standard waveguide.
Common E faces rectangular waveguide filter is using the metallic membrane parallel with E faces of the insertion in rectangular waveguide.Metal film
Piece is processed into the square opening with certain intervals, and is clipped in the middle of waveguide.Material is thus formed one section of empty waveguide, one section of film
The alternating structure of piece waveguide.Wherein, equivalent to coupling is played, empty waveguide just constitutes resonator to diaphragm between two adjacent diaphragms,
Diaphragm is equivalent into T-shaped circuit.Horizontal diaphragm can be analyzed as the perturbation of resonator as common resonator chamber.Due to waveguide one
As be all main mould work, then TE10 moulds can only encourage TEm0 moulds near Waveguide Discontinuities, it is impossible to encouraged TEmn (n ≠
0) mould and TMmn moulds.
In the present invention due to introduce ellipse hole structure make on metallic membrane produce field not with waveguide E face
Parallel but in ellipse hole border two semi-circular electric currents of formation thus cause other patterns in the center of waveguide
Field.
There is Fig. 4 it can be seen that the electric current that elliptical aperture increases metallic membrane edge increased coupling, and in metallic membrane
On form two semi-circular electric currents.
There is Fig. 6 to can be seen that the passband of wave filter of the present invention for 98.5GHz to 94.2GHz, be less than with the loss of interior clawback-
20dB, with being suppressed to -40dB at outer 20%.
The metallic membrane that blocks has scenario described below with the assembling mode of standard waveguide：
Situation 1：The standard waveguide includes left half groove and right half groove of symmetrical connection, the notch of left half groove towards
Right half groove, the notch direction of right half groove towards left half groove, also including upper bracket plate 2 and lower carriage plate 11, metallic membrane
It is clamped between upper bracket plate 2 and lower carriage plate 11, upper bracket plate 2 is connected on the side long of the upside of metallic membrane, lower carriage plate
11 are connected on the side long of the downside of metallic membrane, and the axis of upper bracket plate 2 and the axis of lower carriage plate 11 are parallel with Y-axis, on
Supporting plate 2 and lower carriage plate 11 are clamped between left half groove and right half groove.
Such as Fig. 7 and Fig. 8, contrast case is obtained：The rectangular through-hole of Fig. 1 is set to ellipse hole, while being blocked preceding
Metallic membrane and after when blocking metallic membrane and being not provided with crack, obtain metallic membrane model as shown in Figure 7, be then arranged on mark
Emulated in Quasi-Waveguide, obtained design parameter as Fig. 8.It is measured, to obtain preferable parameter, first order metal film
The length of piece be 0.01mm ~ 0.02mm, i.e. Fig. 7 in before block metallic membrane and after block metallic membrane length be 0.01mm
~ 0.02mm, therefore designed a model using above-mentioned, technological parameter cannot ensure to block before it metallic membrane and after block metallic membrane
Length, can be to reach construction requirement as 0.01mm to 0.02mm, and the length of the embodiment of the present invention 1 is the comparative example
More than ten times.From figure 8, it is seen that return loss（S11）Passband less than -20dB is 95.8GHz to 98.2GHz, with a width of
2.4GHz.But the insertion loss decline of the low band filter in passband is less desirable, shows brighter in return loss
Aobvious, S11 curves decline slowly at the low frequency of passband.
Therefore the metallic membrane for being set using conventional elliptical aperture is far from using conventional rectangular through-hole metallic membrane
Effect it is good.And the model of model and comparative example Fig. 7 to Fig. 1 is compared, the present invention can obtain highly desirable filtering parameter, while
Possess first order metallic membrane more long, make structure very convenient.
As described above, then the present invention can well be realized.
Claims (9)
1. elliptical aperture blocks metallic membrane, it is characterised in that：Including a metallic membrane for rectangle, one and metallic membrane are provided with
The parallel Y-axis in side long, is provided with a Z axis parallel with metallic membrane broadside, and metallic membrane is provided with 4 ellipse holes, 4
Ellipse hole is arranged in a straight line along Y direction, and the major axis of ellipse hole is a, and the short axle of ellipse hole is b, and the value of b is small
In or equal to metallic membrane width edge length, on metallic membrane left end to right-hand member direction, 4 ellipse holes respectively are
Elliptical aperture A（4）, elliptical aperture B（6）, elliptical aperture C（8）, elliptical aperture D（9）, the left end of metallic membrane is provided with left crack, left crack
With elliptical aperture A（4）Connection, left crack is the elongate slot that extreme direction extends to the right by the left end of metallic membrane, metal film
The right-hand member of piece is provided with right crack, right crack and elliptical aperture D（9）Connection, right crack be by the right-hand member of metallic membrane to the left
The elongate slot that extreme direction extends；Elliptical aperture A（4）The metallic membrane in left side blocks metallic membrane before being formed（3）, elliptical aperture D（9）
The metallic membrane on right side blocks metallic membrane after being formed（10）, elliptical aperture A（4）With elliptical aperture B（6）Between metallic membrane formed
First coupling metallic membrane（5）, elliptical aperture B（6）With elliptical aperture C（8）Between metallic membrane formed second couple metallic membrane
（7）, elliptical aperture C（8）With elliptical aperture D（9）Between metallic membrane formed the 3rd couple metallic membrane（12）.
2. elliptical aperture according to claim 1 blocks metallic membrane, it is characterised in that：Also include upper bracket plate（2）With under
Supporting plate（11）, metallic membrane is clamped in upper bracket plate（2）With lower carriage plate（11）Between, upper bracket plate（2）It is connected to metal
On the upside side long of diaphragm, lower carriage plate（11）It is connected on the side long of the downside of metallic membrane, upper bracket plate（2）Axis and under
Supporting plate（11）Axis it is parallel with Y-axis.
3. elliptical aperture according to claim 1 blocks metallic membrane, it is characterised in that：The value of short axle b is：1mm is extremely
2mm, the value of major axis a is：1mm to 2mm.
4. elliptical aperture according to claim 1 blocks metallic membrane, it is characterised in that：4 ellipse holes are all
Standard oval through hole.
5. elliptical aperture according to claim 1 blocks metallic membrane, it is characterised in that：Elliptical aperture A（4）With elliptical aperture B
（6）Between spacing be P, elliptical aperture C（8）, elliptical aperture D（9）Between spacing also be P, elliptical aperture B and elliptical aperture C（8）Between
Spacing is more than P.
6. elliptical aperture according to claim 1 blocks metallic membrane, it is characterised in that：Before block metallic membrane（3）Left end
To elliptical aperture A（4）The distance of central point is：1.5mm to 2.5mm.
7. elliptical aperture according to claim 1 blocks metallic membrane, it is characterised in that：After block metallic membrane（10）Right-hand member
To elliptical aperture D（9）The distance of central point is：1.5mm to 2.5mm.
8. the E faces waveguide filter of metallic membrane is blocked based on any one elliptical aperture in claim 1 to 7, it is characterised in that：
Including a hollow standard waveguide（1）, the elliptical aperture in claim 1 to 7 described in any one block metallic membrane setting
In the cavity of standard waveguide, the input port of standard waveguide is to set along the Y direction to output port direction, preceding to block metal
The left end of diaphragm just to the input port of standard waveguide, after block the right-hand member of metallic membrane just to the output port of standard waveguide；
The upside side long of metallic membrane flushes with the upper inwall of standard waveguide, the downside side long of metallic membrane and the lower inwall of standard waveguide
Flush.
9. E faces according to claim 8 waveguide filter, it is characterised in that：The standard waveguide includes symmetrical connection
Left half groove and right half groove, the notch of left half groove towards right half groove, the notch direction of right half groove towards left half groove,
Also include upper bracket plate（2）With lower carriage plate（11）, metallic membrane is clamped in upper bracket plate（2）With lower carriage plate（11）Between,
Upper bracket plate（2）It is connected on the side long of the upside of metallic membrane, lower carriage plate（11）It is connected on the side long of the downside of metallic membrane,
Upper bracket plate（2）Axis and lower carriage plate（11）Axis it is parallel with Y-axis, upper bracket plate（2）With lower carriage plate（11）Folder
Hold between left half groove and right half groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410699899.0A CN104362416B (en) | 2014-11-28 | 2014-11-28 | Truncate metal membrane with elliptical holes and E-plane waveguide filter composed of truncate metal membrane with elliptical holes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410699899.0A CN104362416B (en) | 2014-11-28 | 2014-11-28 | Truncate metal membrane with elliptical holes and E-plane waveguide filter composed of truncate metal membrane with elliptical holes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104362416A CN104362416A (en) | 2015-02-18 |
| CN104362416B true CN104362416B (en) | 2017-05-24 |
Family
ID=52529656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410699899.0A Active CN104362416B (en) | 2014-11-28 | 2014-11-28 | Truncate metal membrane with elliptical holes and E-plane waveguide filter composed of truncate metal membrane with elliptical holes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104362416B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161807B (en) * | 2015-09-21 | 2018-09-04 | 电子科技大学 | A kind of adjustable THz wave waveguide filter based on element analysis of bimorph thermal actuators |
| CN112713371B (en) * | 2020-12-10 | 2022-03-04 | 北京无线电测量研究所 | Waveguide filter and use method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202564511U (en) * | 2012-04-13 | 2012-11-28 | 河海大学 | K-wave band broadband band-pass filter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4205654B2 (en) * | 2004-10-22 | 2009-01-07 | Ｎｅｃエンジニアリング株式会社 | Band pass filter |
| EP2894711A4 (en) * | 2012-09-07 | 2016-04-20 | Nec Corp | Band-pass filter |
-
2014
- 2014-11-28 CN CN201410699899.0A patent/CN104362416B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202564511U (en) * | 2012-04-13 | 2012-11-28 | 河海大学 | K-wave band broadband band-pass filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104362416A (en) | 2015-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107086338B (en) | Four mould defects ground formula filter | |
| FI112722B (en) | Dielectric resonator apparatus and method for its manufacture | |
| CN105826646B (en) | A kind of porous rectangular waveguide directional coupler | |
| CN105024124B (en) | A kind of new more minor matters multimode resonators and the micro band superwide band bandpass filter based on it | |
| CN105958164A (en) | Cross-coupled bandpass filter with suspended strip lines | |
| CN105489984A (en) | Fractal defected structured quarter-mode substrate integrated waveguide bandpass filter | |
| CN104362416B (en) | Truncate metal membrane with elliptical holes and E-plane waveguide filter composed of truncate metal membrane with elliptical holes | |
| CN105006613A (en) | Quarter-module substrate integration waveguide band-pass filter with an ellipse defect structure | |
| CN103915667A (en) | LTCC band-pass filter using feed structure to restrain third harmonics | |
| JP4807456B2 (en) | Microstrip line filter and manufacturing method thereof | |
| CN109473756A (en) | A kind of complete restructural difference filter | |
| CN104409814B (en) | Block the E faces waveguide bandpass filter of metallic membrane and its composition | |
| CN108054476A (en) | A kind of four band-pass filter of frequency band of microwave | |
| CN107256995A (en) | A kind of micro-strip dual-pass band-pass filter | |
| CN112768854B (en) | High-selectivity differential dual-passband microstrip filter based on stepped impedance resonator | |
| CN107591597A (en) | Based on the satellite communication of split-ring resonator KU band filters | |
| CN114865255B (en) | Half-mode substrate integrated waveguide filter | |
| CN205543165U (en) | Integrated waveguide filter of high selectivity bimodulus substrate | |
| JP2000252704A (en) | Dielectric filter | |
| CN107293831B (en) | Resonator and filter | |
| CN106486723B (en) | Based on microstrip line-slot line structure ultra-wide band filter | |
| CN215184462U (en) | Substrate integrated waveguide filter with miniaturization and high selectivity | |
| Utami et al. | SIW power divider and its performance analysis affected by number of incorporated CSRRs | |
| CN108493532A (en) | A kind of adjustable microstrip filter of bandwidth | |
| CN202009064U (en) | Part-H-surface microwave band filter based on PCB technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |