CN105428767B - X-frequency-band ultra-high-power absorption type harmonic filter - Google Patents
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- CN105428767B CN105428767B CN201510837435.6A CN201510837435A CN105428767B CN 105428767 B CN105428767 B CN 105428767B CN 201510837435 A CN201510837435 A CN 201510837435A CN 105428767 B CN105428767 B CN 105428767B
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Abstract
The invention discloses an X-frequency-band ultra-high-power absorption type harmonic filter, which comprises an upper waveguide cavity and a lower waveguide cavity, wherein the upper waveguide cavity and the lower waveguide cavity are buckled to form a main waveguide cavity with a rectangular cross section, waveguide flanges are respectively arranged on two side surfaces of the main waveguide cavity, and a middle cavity and a cover plate which are completely the same in shape and size are respectively and fixedly arranged outside the upper waveguide cavity and the lower waveguide cavity from inside to outside. The invention realizes the suppression of second, third and fourth harmonics simultaneously by arranging twelve groups of secondary waveguide cavities with gradually changed sizes, wherein the suppression degree of the second harmonic is more than 70dB, the suppression degree of the third harmonic is more than 60dB, and the suppression degree of the fourth harmonic is more than 40dB, thereby greatly reducing the interference on a receiving channel; the coupling hole is adopted to load the secondary waveguide cavity structure, the insertion loss of the filter is less than 0.2dB, the standing wave of the passband is less than 1.1, the power capacity of the filter is greatly improved, and the filter can be widely applied to various high-power microwave fields.
Description
Technical field
The present invention relates to X frequency range microwave ultra high power transmitter applies technical fields, more particularly to a kind of X frequency ranges super large work(
The absorption harmonic filter of rate.
Background technology
With the propulsion of global IT application, substantial amounts of information needs to be transmitted by radio frequency, microwave telecommunication devices, it is desirable to
Its transmission speed is more accelerated, and transmission bandwidth is more widened, and antijamming capability is more strengthened, and act as extremely in these requirements median filter
Important effect.Particularly in the High-Power Microwave application field such as survey of deep space, the effect of wave filter is more prominent, develops simultaneously
Difficulty also greatly improves.Increasing communication system must in limited frequency spectrum resource normal work, must on demand to frequency
Spectrum is distributed, then selects the accuracy requirement of frequency harsher in wave filter.Simultaneously with civilian communications equipment and military
The growth requirement of signal equipment, wave filter is proposed more to be strict with.Study high-performance, the wave filter pair of super high power capacity
Current High-Power Microwave communication equipment is most important.
The content of the invention
It is an object of the invention to provide a kind of absorption harmonic filter of X frequency ranges super high power, survey of deep space can be made micro-
Wave height power amplifier presses down when carrying out microwave power output, by harmonic filter to multiple harmonic and frequency acceptance band signal spur performance
System, the interference eliminated to receiving device is realized, when ensure that emitter high-power operation, does not disturb receiving device to work.
The technical solution adopted by the present invention is：
A kind of absorption harmonic filter of X frequency ranges super high power, including upper wave-guide cavity wave and lower wave-guide cavity wave, upper waveguide cavity
It is rectangular main waveguide cavity that body fastens Formation cross-section with lower wave-guide cavity wave, and the two sides of main waveguide cavity are separately installed with waveguide method
Orchid, the outside of the upper wave-guide cavity wave and lower wave-guide cavity wave, is fixedly installed shape size complete one successively respectively from inside to outside
The middle chamber and cover plate of sample, described cover plate, middle chamber and upper and lower wave-guide cavity wave are sealed by trip bolt respectively
Fixed stratiform is set；
It is yi word pattern wherein to descend wave-guide cavity wave；Multiple first rectangular openings are provided with described lower wave-guide cavity wave, it is described
Multiple first rectangular openings are symmetrical along the lower row of wave-guide cavity wave journey two, and the width of described multiple first rectangular openings is identical, and institute
The first rectangular opening stated is symmetrical as axle both sides using two the first rectangular openings for being arranged on the row of middle one on lower wave-guide cavity wave,
The length for the first rectangular opening being distributed to both sides diminishes successively；The first described rectangular opening is close to one end of main waveguide cavity to first
Being extended in rectangular opening has extension ear, and it is coupling aperture to surround the hole formed by extension ear；
Described upper wave-guide cavity wave on lower wave-guide cavity wave corresponding surface with being correspondingly arranged on multiple second rectangular openings, after assembling,
The position of the second described rectangular opening and the position of the first rectangular opening are correspondence position relation, and the first rectangular opening of correspondence position
Shape, size all same with the second rectangular opening；The second described rectangular opening is close to one end of main waveguide cavity to the second rectangular opening
Interior be extended has extension ear, and it is coupling aperture to surround the hole formed by extension ear；
Multiple 3rd rectangular openings, after assembling, the 3rd described rectangular opening and the second square are provided with described middle chamber
Shape hole is correspondingly arranged, and the number of the 3rd rectangular opening is identical with the second rectangle hole number, correspondence position it is the 3rd rectangular opening, big
Small, shape is identical with size, the shape of the second rectangular opening；
With the contact surface of middle chamber and the corresponding setting of the 3rd rectangular opening of middle chamber is arranged on described cover plate
Fluted, the groove face size of described groove is identical with the hole face size of the 3rd rectangular opening, and absorbing load is provided with groove；
Groove on described cover plate and the 3rd rectangular opening, the second rectangular opening or the first rectangular opening shape being correspondingly arranged therewith
Into complementary wave guide cavity.
Described more first rectangular openings point are that the pore size of the first rectangular opening in 12 groups, every group is identical altogether.
The number of the rectangular opening of pore size identical first is six in described every group.
Described main waveguide cavity and the surface of internal cavity of complementary wave guide cavity are provided with Gold plated Layer.
Described absorbing load is the notch size of the triangular prism that cross section is triangle, triangular prism bottom surface size and groove
It is identical.
Described absorbing load bottom surface is wiped with high intensity heat-conducting glue, is then close to the absorbing load corresponding with rectangular channel
In cover plate rectangular channel.
Between described each complementary wave guide cavity at intervals of 3/4 waveguide wavelength, i.e., per two neighboring first rectangular opening row upward axis
Spacing is 3/4 waveguide wavelength.
The present invention is realized and two, three and four-time harmonic is carried out simultaneously by the complementary wave guide cavity of 12 groups of size gradual changes of setting
Suppress, second harmonic degree of suppression is more than 70dB, and triple-frequency harmonics degree of suppression is more than 60dB, and four-time harmonic degree of suppression is more than 40dB, pole
The big interference reduced to accept channel；Complementary wave guide cavity structure is loaded using coupling aperture, filter insertion loss is less than 0.2dB,
Passband standing wave is less than 1.1, substantially increases filter power capacity, can be widely applied to various High-Power Microwave fields；This hair
Bright power capacity is high, and mean power capacity reaches more than 100kW；Volume is relatively small, and in light weight, length, width and height are only
It is 182mmx68.3mmx83.8mm significant for superpower transmitter system compact；Further port of the present invention
Using standard BJ70 waveguide flanges, be easily installed, performance indications it is good.In summary, the present invention is simple in construction, novel, installation
Compact, technology difficulty is small, easy to process；Reliability is high, is highly suitable to be applied for High-Power Microwave emitter.
Brief description of the drawings
Fig. 1 is the installation diagram of the present invention；
Fig. 2 is the part-structure schematic diagram of cover plate of the present invention and absorbing load；
Fig. 3 is the structure schematic diagram of upper waveguide cavity of the present invention；
Fig. 4 is the equivalent circuit theory block diagram of the present invention.
Embodiment
As shown in Figure 1,2 and 3, the present invention includes a kind of absorption harmonic filter of X frequency ranges super high power, including upper waveguide
Cavity 3 and lower wave-guide cavity wave 4, it is rectangular main waveguide cavity 7 that upper wave-guide cavity wave 3 fastens Formation cross-section with lower wave-guide cavity wave 4, main
The two sides of waveguide cavity 7 are separately installed with waveguide flange 8, can be used to closely be connected with outer welding system.The upper wave-guide cavity wave 3 with
The outside of lower wave-guide cavity wave 4, it is fixedly installed the duplicate middle chamber 2 of shape size and cover plate successively respectively from inside to outside
1, described cover plate 1, middle chamber 2 and upper and lower wave-guide cavity wave carry out sealing fixed stratiform setting respectively by trip bolt 9；
It is yi word pattern wherein to descend wave-guide cavity wave 4；Multiple first rectangular openings are provided with described lower wave-guide cavity wave 4, it is described
Multiple first rectangular openings it is symmetrical along two rows of lower 4 journey of wave-guide cavity wave, the width of described multiple first rectangular openings is identical, and
The first described rectangular opening is symmetrically divided using two the first rectangular openings for being arranged on the row of middle one on lower wave-guide cavity wave 4 as axle both sides
Cloth, the length for the first rectangular opening being distributed to both sides diminish successively；The first described rectangular opening close to one end of main waveguide cavity 7 to
Being extended in first rectangular opening has extension ear, and it is coupling aperture to surround the hole formed by extension ear；
Described upper wave-guide cavity wave 3 assembles with being correspondingly arranged on multiple second rectangular openings 6 on the lower corresponding surface of wave-guide cavity wave 4
Afterwards, the position of the second described rectangular opening 6 and the position of the first rectangular opening are correspondence position relation, and the first square of correspondence position
The shape of shape hole and the second rectangular opening 6, size all same；The second described rectangular opening 6 is close to one end of main waveguide cavity 7 to second
Being extended in rectangular opening 6 has extension ear, and it is coupling aperture to surround the hole formed by extension ear；Described multiple first rectangular openings point
Altogether be 12 groups, every group in the first rectangular opening pore size it is identical.The rectangular opening of pore size identical first in described every group
Number be six.
Selected because the number by multiple second rectangular openings is different with effect according to demand, the application is with specific optimal
Embodiment illustrates：As shown in figure 3, upper wave-guide cavity wave 3 includes multiple screw 22, BJ70 ripples being fixed for screw 9
Inducing defecation by enema and suppository orchid 8 and multiple second rectangular openings, the rectangular opening of size identical second are one group, then second rectangular opening is divided into 12
Group, a row is provided with six identical rectangular openings in every group（Simplification eliminates in figure）, be total up to 12 rectangular opening 24-1,12
12 rectangular opening 28-1 of rectangular opening 24-2 ..., 12 rectangular opening 28-2 and 24 rectangular opening 29-1, totally 144 rectangular openings, often
Individual rectangular opening is provided with extension ear 34 with the place that 20 main chamber inner surface, 32 wide face contacts in wave filter main chamber, and extension ear 34 is formed
Hole to be coupling aperture 35, as above shown in the A-A profiles 3 of wave-guide cavity wave 3, after partial enlargement, be rectangular opening 33 in contrast
These square openings of coupling aperture 35. answered and corresponding coupling aperture wave-guide cavity wave 3 along wave filter are distributed in two rows, every kind of
Square opening, 6 arranged side by side are often arranged, by upper wave-guide cavity wave 3 both ends rectangular opening 24-1,24-2 to the upper intermediate rectangular hole 29- of wave-guide cavity wave 3
1 becomes larger, and on upper wave-guide cavity wave 3 into axial symmetry.Groove 11 on described cover plate 1 and be correspondingly arranged therewith the
Three rectangular openings, the second rectangular opening or the first rectangular opening form complementary wave guide cavity.From above-mentioned example, wave filter is upper and lower a total of
288 complementary wave guide cavities.
Multiple 3rd rectangular openings, after assembling, the 3rd described rectangular opening and the second square are provided with described middle chamber 2
Shape hole 6 is correspondingly arranged, and the number of the 3rd rectangular opening is identical with the quantity of the second rectangular opening 6, correspondence position it is the 3rd rectangular opening, big
Small, shape is identical with size, the shape of the second rectangular opening 6；
Because the architectural feature of the first rectangular opening and the second rectangular opening is identical, so first rectangle that will not be repeated here
The concrete structure diagram in hole, and because the structure distribution feature of the 3rd rectangular opening is corresponding identical with the structure of the second rectangular opening, only
Coupling aperture is the absence of, so the concrete structure of middle chamber is not it is clear that so carry out in citing enumerating explanation herein yet.
On described cover plate 1 with the contact surface of middle chamber 2 is corresponding with the 3rd rectangular opening that is arranged on middle chamber 2 sets
Groove 11 is equipped with, the groove face size of described groove 11 is identical with the hole face size of the 3rd rectangular opening, and is provided with groove 11
Absorbing load 12；
Described main waveguide cavity 7 and the surface of internal cavity of complementary wave guide cavity are provided with Gold plated Layer.Main waveguide cavity can be used to transmit height
Power microwave.Complementary wave guide cavity realizes impedance matching by coupling aperture 35 with main waveguide cavity 7, for the multiple of extraction filter parasitism
Harmonic wave and higher mode microwave energy, by pasting the absorbing load on two cover plates 1, the multiple harmonic that complementary wave guide cavity is extracted
And higher mode microwave energy absorption, so as to realize the suppression to multiple harmonic and higher mode.
Described absorbing load 12 is the triangular prism that cross section is triangle, and described triangular prism is by resistant to elevated temperatures polymer
Manufactured electromagnetically material, the described bottom surface of absorbing load 12 are wiped with high intensity heat-conducting glue, then will be corresponding with rectangular channel
Absorbing load is close in the groove 11 on cover plate 1.
Between described each complementary wave guide cavity at intervals of 3/4 waveguide wavelength, i.e., per two neighboring first rectangular opening row upward axis
Spacing is 3/4 waveguide wavelength.The present invention is humorous to develop waveguide using the series connection complementary wave guide cavity at a distance of quarter-wave integral multiple
Wave filter, as shown in Figure 4, generally, the interval between complementary wave guide cavity takes 1/4 waveguide wavelength to be to the equivalent circuit of this wave filter
Inadequate, this is due to that the rake of each complementary wave guide cavity closes the edge field interactions around hole, it will make the performance depreciation of wave filter,
There are three attenuation peaks in the response of its stopband, has between two peaks than relatively low Shuai Jianshi rather than required single highly attenuating peak.
The waveguide filter frequency response formula designed by low-pass prototype：
（1）
Represented, can write as with wavelength：
（2）
In formula、WithThe waveguide wavelength of band edge respectively above and below stopband center and stopband.In waveguide harmonic
In device, it is in Y main waveguide cavity that each complementary wave guide cavity, which is connected to characteristic admittance, with coupling aperture, and each complementary wave guide cavity is all characteristic admittance
For YbWaveguide cavity, its length is slightly less than half of waveguide wavelength.The length of rectangle coupling aperture is much smaller than half free space wave
It is long, and approximate can regard the inductance being in series with main waveguide as.The equivalent circuit C of complementary wave guide cavity and coupling aperture compositionnWith HnRing junction
Structure, as shown in Figure 4.Then absorbing load 12 is added in each complementary wave guide cavity end, coupled harmonics and the energy of higher mode is turned
Heat energy is melted into, is shed by wave guide wall.
The susceptance B of each coupling aperture can use the intensity of magnetization on the coupling apertureCarry out approximate determination.Its expression formula is：
（3）
A is the width of complementary wave guide cavity in formula, b、It is height.If it is in thicknessOpened on unlimited thin wall one it is a length ofLotus root
Close hole,Much smaller than half free space wavelength.In general, whenNot to be unlimited thin,Also not much smaller than half freely
During space wavelength, then there is experience relational expression：
（4）
In formulaCentered on frequency () when free space wavelength, andFor corresponding waveguide ripple
It is long.Each the condition of resonance of complementary wave guide cavity is：
（5）
In formula
（6）
L is the length of complementary wave guide cavity.
The susceptance Slope Parameters of each complementary wave guide cavity, which swash, in terms of main transmission line is：
（7）
In formula
,,
Wherein,It is assumed that do not become with frequency.By theoretical calculation and combine electromagnetic-field simulation, it is known that when
When the condition that complementary wave guide cavity and coupling aperture should meet, complementary wave guide cavity can extract particular harmonic or high order from main waveguide cavity
Mould frequency.
The present invention is in assembling, as shown in figure 1, after installing absorbing load 12 in the institute of cover plate 1 fluted 11 again first, by band
The one side for having absorbing load 12 is held in intermediate cavity 2, wherein, the 3rd rectangular opening corresponds with the phase of groove 11；Then by
Between chamber 2 be held on the end face in the non-coupled place face of hole 35 of wave-guide cavity wave 3, and with screw 9 by screw 21 by cover plate 1, in
Between cavity 3 tighten together；Middle chamber 3 is held on the end face in the non-coupled place face of hole 35 of lower wave-guide cavity wave 4 simultaneously, and
Another group of cover plate 1 and middle chamber 3 are tightened together by screw 21 with screw 9, the upper wave-guide cavity wave 3 that will finally fasten
With one group of cover plate 1, middle chamber 3 one is fastened on, lower wave-guide cavity wave 4 by screw 9 with another group of cover plate 1, middle chamber 3
Rise.
Absorption super high power harmonic filter designed by the present invention has as follows a little：Power capacity is high, average work(
Rate capacity is up to more than 100kW；Volume is relatively small, in light weight, length, width and height only 182mmx68.3mmx83.8mm, for super large work(
The miniaturization of rate transmitter system is significant；Port uses standard BJ70 waveguide flanges, is easily installed；Performance indications are good,
By setting the complementary wave guide cavity of 12 groups of size gradual changes, realize and two, three and four-time harmonic are suppressed simultaneously, second harmonic
Degree of suppression is more than 70dB, and triple-frequency harmonics degree of suppression is more than 60dB, and four-time harmonic degree of suppression is more than 40dB, greatly reduces to receiving
The interference of channel；Complementary wave guide cavity structure is loaded using coupling aperture, filter insertion loss is less than 0.2dB, and passband standing wave is less than
1.1, filter power capacity is substantially increased, can be widely applied to various High-Power Microwave fields；To sum up, structure letter of the present invention
Single, novel, install compact, technology difficulty is small, easy to process；Reliability is high, is highly suitable to be applied for High-Power Microwave emitter.
Claims (7)
- A kind of 1. absorption harmonic filter of X frequency ranges super high power, it is characterised in that：Including upper wave-guide cavity wave and lower waveguide cavity Body, it is rectangular main waveguide cavity that upper wave-guide cavity wave fastens Formation cross-section with lower wave-guide cavity wave, and the two sides of main waveguide cavity are distinguished Waveguide flange is installed, the outside of the upper wave-guide cavity wave and lower wave-guide cavity wave, is fixedly installed successively respectively from inside to outside tangible The duplicate middle chamber of shape size and cover plate, described cover plate, middle chamber and upper and lower wave-guide cavity wave pass through fastening respectively Screw carries out sealing fixed stratiform setting；It is yi word pattern wherein to descend wave-guide cavity wave；Multiple first rectangular openings are provided with described lower wave-guide cavity wave, described is multiple First rectangular opening is symmetrical along the lower row of wave-guide cavity wave journey two, and the width of described multiple first rectangular openings is identical and described First rectangular opening is symmetrical as axle both sides using two the first rectangular openings for being arranged on the row of middle one on lower wave-guide cavity wave, to two The length of first rectangular opening of side distribution diminishes successively；The first described rectangular opening is close to one end of main waveguide cavity to the first rectangle Being extended in hole has extension ear, and it is coupling aperture to surround the hole formed by extension ear；Described upper wave-guide cavity wave is described after assembling with being correspondingly arranged on multiple second rectangular openings on lower wave-guide cavity wave corresponding surface The position of the second rectangular opening and the position of the first rectangular opening be correspondence position relation, and the first rectangular opening of correspondence position and Shape, the size all same of two rectangular openings；The second described rectangular opening prolongs close to one end of main waveguide cavity into the second rectangular opening Stretch and be provided with extension ear, it is coupling aperture to surround the hole formed by extension ear；Multiple 3rd rectangular openings, after assembling, the 3rd described rectangular opening and the second rectangular opening are provided with described middle chamber It is correspondingly arranged, the number of the 3rd rectangular opening is identical with the second rectangle hole number, the 3rd rectangular opening of correspondence position, size, shape Shape is identical with size, the shape of the second rectangular opening；On described cover plate with the contact surface of middle chamber with the 3rd rectangular opening that is arranged on middle chamber it is corresponding be provided with it is recessed Groove, the groove face size of described groove is identical with the hole face size of the 3rd rectangular opening, and absorbing load is provided with groove；Groove on described cover plate forms pair with the 3rd rectangular opening, the second rectangular opening or the first rectangular opening being correspondingly arranged therewith Waveguide cavity.
- 2. the absorption harmonic filter of X frequency ranges super high power according to claim 1, it is characterised in that：Described is multiple First rectangular opening point is that the pore size of the first rectangular opening in 12 groups, every group is identical altogether.
- 3. the absorption harmonic filter of X frequency ranges super high power according to claim 2, it is characterised in that：In described every group The number of the rectangular opening of pore size identical first is six.
- 4. the absorption harmonic filter of X frequency ranges super high power according to claim 3, it is characterised in that：Described main ripple The surface of internal cavity of guide cavity and complementary wave guide cavity is provided with Gold plated Layer.
- 5. the absorption harmonic filter of X frequency ranges super high power according to claim 4, it is characterised in that：Described absorption Load for the triangular prism that cross section is triangle, triangular prism bottom surface size it is identical with the notch size of groove.
- 6. the absorption harmonic filter of X frequency ranges super high power according to claim 5, it is characterised in that：Described absorption Load floor surface is wiped with high intensity heat-conducting glue, and then the absorbing load corresponding with rectangular channel is close in cover plate rectangular channel.
- 7. the absorption harmonic filter of X frequency ranges super high power according to claim 6, it is characterised in that：Described complementary wave Between guide cavity at intervals of 3/4 waveguide wavelength, i.e., it is 3/4 waveguide wavelength upward distance between axles to be arranged per two neighboring first rectangular opening.
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| FR3057404B1 (en) * | 2016-10-11 | 2018-11-30 | Thales | METHOD FOR GENERATING A PLURALITY OF CURRENTS HAVING EACH FREQUENCY |
| CN110850374B (en) * | 2019-10-30 | 2023-11-17 | 安徽四创电子股份有限公司 | Harmonic filter for air-duct primary radar |
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| EP1646105A1 (en) * | 2004-10-07 | 2006-04-12 | Huber+Suhner Ag | Filter assemblies and communication systems based thereon |
| JP2011254418A (en) * | 2010-06-04 | 2011-12-15 | Toko Inc | Connection structure of cavity waveguide and dielectric waveguide |
| CN203967219U (en) * | 2014-05-22 | 2014-11-26 | 南京灏众通信技术有限公司 | A kind of one side magnetizes the waveguide duplexer of built-in isolator |
| CN104868211A (en) * | 2015-05-27 | 2015-08-26 | 中国电子科技集团公司第二十七研究所 | Tunable high power waveguide band-stop filter |
| CN205282622U (en) * | 2015-11-26 | 2016-06-01 | 中国电子科技集团公司第二十七研究所 | X frequency channel ultra -large -power absorbs formula harmonic filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8258897B2 (en) * | 2010-03-19 | 2012-09-04 | Raytheon Company | Ground structures in resonators for planar and folded distributed electromagnetic wave filters |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1646105A1 (en) * | 2004-10-07 | 2006-04-12 | Huber+Suhner Ag | Filter assemblies and communication systems based thereon |
| JP2011254418A (en) * | 2010-06-04 | 2011-12-15 | Toko Inc | Connection structure of cavity waveguide and dielectric waveguide |
| CN203967219U (en) * | 2014-05-22 | 2014-11-26 | 南京灏众通信技术有限公司 | A kind of one side magnetizes the waveguide duplexer of built-in isolator |
| CN104868211A (en) * | 2015-05-27 | 2015-08-26 | 中国电子科技集团公司第二十七研究所 | Tunable high power waveguide band-stop filter |
| CN205282622U (en) * | 2015-11-26 | 2016-06-01 | 中国电子科技集团公司第二十七研究所 | X frequency channel ultra -large -power absorbs formula harmonic filter |
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