CN109712777A - The preparation method of filter, test macro and filter - Google Patents
The preparation method of filter, test macro and filter Download PDFInfo
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- CN109712777A CN109712777A CN201910142222.XA CN201910142222A CN109712777A CN 109712777 A CN109712777 A CN 109712777A CN 201910142222 A CN201910142222 A CN 201910142222A CN 109712777 A CN109712777 A CN 109712777A
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- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
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Abstract
The present invention provides the preparation method of a kind of filter, test macro and filter, and filter includes: spiral winding, including several twisted pairs, and the direction of winding of half twisted pair is that clockwise, the direction of winding of remaining twisted pair is counterclockwise；Shielding box, shielding box include box body and lid；It is formed with holding tank in box body, the through-hole being connected with holding tank is formed on the side wall of box body；Spiral winding is located in holding tank；Lid is covered on box body；Adapter, including the first adapter and the second adapter；First adapter is located on the outside of box body, and is electrically connected via through-hole with one end of spiral winding；Second adapter is located on the outside of box body, and is electrically connected via through-hole with the other end of spiral winding；Powder is shielded, shielding powder covering spiral winding simultaneously fills up holding tank.Filter of the present invention can filter the high-frequency signal in removal test macro；Shielding box can shield magnetic disturbance of the extraneous magnetic signal to spiral winding, to avoid impacting test signal.
Description
Technical field
The invention belongs to technical field of photoelectric detection, more particularly to the system of a kind of filter, test macro and filter
Preparation Method.
Background technique
The research and development of Superconductor Physics more depends on new superconductive device, and corresponding majority superconductive device needs arrive
It is tested up to lower temperature and in the environment of less noise.Faint high frequency but when reaching extremely low temperature, in environment
Signal and electromagnetic signal physical message many when can generate huge interference, especially material to test near zero warm state
It is blanked, therefore is badly in need of a set of effective filtering system help and solves signal interference problem.Filter common at present is mostly one
Low-frequency filter including a little filtering including PI, conventional test macro also can not effectively shield high-frequency signal, therefore should
Invention, which is put forth effort on, designs the efficient low-and high-frequency filtering system that a set of low-and high-frequency combines.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of filter, test macro and
The preparation method of filter, for solving the problems, such as that filtering system in the prior art can not effectively filter high-frequency signal.
In order to achieve the above objects and other related objects, the present invention provides a kind of filter, and the filter includes: spiral
Coil, the spiral winding include several twisted pairs, wherein and the direction of winding of twisted pair described in half is clockwise direction,
The direction of winding of remaining twisted pair is counterclockwise；Shielding box, the shielding box include box body and lid；Wherein, institute
It states and is formed with holding tank in box body, the through-hole being connected with the holding tank is formed on the side wall of the box body；The spiral
Coil is located in the holding tank；The lid is covered on the box body；Adapter, the adapter include the first adapter
And second adapter；Wherein, first adapter is located on the outside of the box body, and via the through-hole and the spiral winding
One end electrical connection；Second adapter is located on the outside of the box body, and via the another of the through-hole and the spiral winding
One end electrical connection；Powder is shielded, the shielding powder covers the spiral winding and fills up the holding tank.
As a preferred solution of the present invention, the length of the spiral winding is 2 meters~3 meters.
As a preferred solution of the present invention, in the spiral winding, the adjacent twisted pair around to contrary.
As a preferred solution of the present invention, the shielding box further includes partition, the partition in the box body every
Separate out two holding tanks；The through-hole there are two being formed on the box side wall, the through-hole and the holding tank are one by one
Corresponding connection；The spiral winding is located in two holding tanks；First adapter and second adapter pass through respectively
It is electrically connected by the different through-holes with the spiral winding.
As a preferred solution of the present invention, the spiral winding in extending in the shape of a spiral in the holding tank, and position
It is opposite in the direction of winding of the spiral winding in two holding tanks.
As a preferred solution of the present invention, first adapter include in lemo connector and BNC connector at least
One kind, second adapter include at least one of lemo connector and BNC connector.
As a preferred solution of the present invention, the shielding box includes copper shield box, and the shielding powder includes copper powder.
As a preferred solution of the present invention, the shielding powder further includes resin or AB insulative glue, the shielding powder
In, the copper powder and the resin or the mass ratio of the AB insulative glue are 1.5:1~2.5:1.
The present invention also provides a kind of preparation method of filter, the preparation method of the filter includes:
Spiral winding is prepared, the spiral winding includes several twisted pairs, wherein the coiling side of twisted pair described in half
To for clockwise, the direction of winding of remaining twisted pair is counterclockwise；
A shielding box is provided, the shielding box includes box body and lid；Wherein, it is formed with holding tank in the box body, institute
State the through-hole for being formed on the side wall of box body and being connected with the holding tank；The spiral winding is placed in the holding tank；
It is connected respectively with the spiral winding both ends using adapter, by the spiral winding from the shielding box
It draws；
Shielding powder is provided, the shielding powder is filled in the box body, the shielding powder covers the spiral winding simultaneously
Fill up the holding tank.
A kind of preferred embodiment of preparation method as filter of the invention, preparing the spiral winding includes following step
It is rapid:
Configure the shielding powder；
Wire rod is made using the part shielding powder；
Several twisted pairs are provided, the twisted pair is wound on the wire rod.
The present invention also provides a kind of test macro, the test macro includes:
Cryogenic chamber；
Dilution refrigeration machine is located in the cryogenic chamber, and the dilution refrigeration machine includes temperature end and low-temperature end, the height
The electrical connection of low-temperature end described in Wen Duanyu；
Sample to be tested is located in the cryogenic chamber；
Sample carrier is located in the cryogenic chamber, is electrically connected with the sample to be tested；
First filter, between the sample carrier and the sample to be tested, and with the sample carrier and it is described to
Test sample electrical connection；Or the low-temperature end positioned at the dilution refrigeration machine, and in the low temperature of the dilution refrigeration machine
End is electrically connected with the sample carrier；The first filter includes the filter as described in above-mentioned either a program；
Second filter is electrically connected with the temperature end of the dilution refrigeration machine；
Third filter is electrically connected with the second filter far from one end of the dilution refrigeration machine；
P-wire is electrically connected with the temperature end of the third filter and the dilution refrigeration machine；Wherein, described
Two filters or the third filter include the filter as described in above-mentioned either a program；
Measuring instrument is electrically connected with the second filter or the third filter；
Measurement and Control System, one end and the measuring instrument with the p-wire far from the third filter are electrically connected
It connects.
As a preferred solution of the present invention, the second filter includes the filtering as described in above-mentioned either a program
Device, the measuring instrument are electrically connected with the second filter；The third filter includes Pi filter.
As a preferred solution of the present invention, the second filter includes Pi filter；The third filter packet
The filter as described in above-mentioned either a program is included, the measuring instrument is electrically connected with the third filter.
As described above, the preparation method of filter of the invention, test macro and filter, has the advantages that
The spiral winding of filter of the present invention includes the twisted pair that several direction of windings are not quite similar, and spiral winding is put
Shielding box is filled up in shielding box and by the covering of shielding powder, shielding powder can come into full contact with spiral winding, to filter removal
High-frequency signal in test macro；Shielding box can shield magnetic disturbance of the extraneous magnetic signal to spiral winding, to avoid to survey
Trial signal impacts；The noise filtering effect of filter of the invention can achieve -80dB to -100dB；The present invention passes through small
Volume integrated coil effectively saves filter space, in conjunction with photoetching process can effectively reduction filter volume,
Adapt to various small extremely low temperature cavitys；In addition the present invention also has many advantages, such as low cost, low manufacture difficulty.
Two holding tanks, coiling side of the spiral winding in two holding tanks is arranged in shielding box in filter of the invention
To on the contrary, two reversed magnetic fluxs can be generated when electric current flows through the spiral winding, and two reversed magnetic fluxs can be mutual
It upsets, cancels out each other, to reduce the electric signal interference of the spiral winding；
Test macro provided by the invention can remove the complicated telecommunications of test equipment generation by the way that the filter is arranged
Number, heat sink effect is played, the high-frequency signal in test macro can also be removed.
Detailed description of the invention
Fig. 1 is shown as the overlooking structure diagram of the filter provided in the embodiment of the present invention one.
Fig. 2 is shown as the structural schematic diagram of the spiral winding in the filter provided in the embodiment of the present invention one.
Fig. 3 is shown as the schematic perspective view of the box body in the filter provided in the embodiment of the present invention one.
Fig. 4 is shown as the overlooking structure diagram of the lid in the filter provided in the embodiment of the present invention one.
Fig. 5 is shown as being not provided with the filter effect figure of the filtering system of the filter provided in the embodiment of the present invention one.
Fig. 6 is shown as being provided with the filter effect figure of the filtering system of filter of the invention.
Fig. 7 is shown as the flow chart of the preparation method of filter provided by the invention.
Fig. 8 and Fig. 9 is shown as the structural block diagram of the test macro provided in the embodiment of the present invention three.
Component label instructions
1 filter
11 spiral windings
111 first twisted pairs
112 second twisted pairs
113 third twisted pairs
114 the 4th twisted pairs
12 shielding boxs
121 box bodys
122 holding tanks
123 through-holes
124 partitions
125 lids
131 first adapters
132 second adapters
2 cryogenic chambers
31 temperature ends
32 low-temperature ends
4 samples to be tested
5 sample carriers
61 first filters
62 second filters
63 third filters
7 p-wires
8 Measurement and Control Systems
9 measuring instruments
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily.
Fig. 1 is please referred to Fig. 9.It should be clear that this specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to
Cooperate the revealed content of specification, so that those skilled in the art understands and reads, being not intended to limit the invention can be real
The qualifications applied, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
It is whole, in the case where not influencing the effect of present invention can be generated and the purpose that can reach, it should all still fall in disclosed skill
Art content obtains in the range of capable of covering.Meanwhile in this specification it is cited as "upper", "lower", "left", "right", " centre " and
The term of " one " etc. is merely convenient to being illustrated for narration, rather than to limit the scope of the invention, relativeness
It is altered or modified, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the present invention.
Embodiment one
The present invention provides a kind of filter 1 referring to FIG. 1 to FIG. 4, and the filter 1 includes: spiral winding 11, described
Spiral winding 11 includes several twisted pairs, wherein the direction of winding of twisted pair described in half is clockwise, described in remaining
The direction of winding of twisted pair is that counterclockwise, i.e., the direction of winding of twisted pair described in half is the other half institute clockwise
The direction of winding of twisted pair is stated as counterclockwise；Shielding box 12, the shielding box 12 include box body 121 and lid 125；Its
In, it is formed with holding tank 122 in the box body 121, is formed on the side wall of the box body 121 and is connected with the holding tank 122
Logical through-hole 123；The spiral winding 11 is located in the holding tank 122；The lid 125 is covered on the box body 121；
Adapter, the adapter include the first adapter 131 and the second adapter 132；Wherein, first adapter 131 is located at
121 outside of box body, and be electrically connected via the through-hole 123 with one end of the spiral winding 11；Second adapter
132 are located at 121 outside of box body, and are electrically connected via the through-hole 123 with the other end of the spiral winding 11；Shield powder
(not shown), the shielding powder cover the spiral winding 11 and fill up the holding tank 122.The filter 1 of the invention
In spiral winding 11 include the twisted pair that is not quite similar of several direction of windings, and spiral winding 11 is put in the institute of shielding box 12
It states in holding tank 122 and the holding tank 122 is filled up by shielding powder covering, the shielding powder can be with the spiral winding
11 come into full contact with, to filter the high-frequency signal in removal test macro；The shielding box 12 can shield extraneous magnetic signal pair
The magnetic disturbance of the spiral winding 11, to avoid impacting test signal；The noise of the filter 1 of the invention is filtered
Wave effect can achieve -80dB to -100dB；The filter 1 of the invention also has many advantages, such as small in size, at low cost.
As an example, the quantity for the twisted pair that the spiral winding 11 includes can be set according to actual needs
Fixed, for example, the spiral winding 11 may include two, three, four, five, six even more a plurality of twisted pairs, excellent
Selection of land, the quantity of twisted pair described in the spiral winding 11 are even number, and direction of winding is suitable in the spiral winding 11
The quantity of the conterclockwise twisted pair is that the quantity of the anticlockwise twisted pair is identical with direction of winding.
As an example, in the spiral winding 11, adjacent two twisted pair around to contrary；The i.e. described helix
The direction of winding of a twisted pair is that clockwise, then the direction of winding of the twisted pair adjacent thereto is inverse in circle 11
Clockwise, meanwhile, the direction of winding with the direction of winding twisted pair that be the anticlockwise twisted pair adjacent is
Clockwise.
As an example, each twisted pair successively replaces around the home to form the spiral winding 11, as shown in Fig. 2, in Fig. 2
It include four twisted pairs as example using the spiral winding 11.
As an example, the length of the spiral winding 11 can be set according to actual needs, it is preferable that the present embodiment
In, the length of the spiral winding 11 is preferably 2 meters~3 meters, and in the length range, the spiral winding 11 has optimal
Flux shield effect.
As an example, the quantity of the holding tank 122 can be set according to actual needs in the shielding box 12, it is excellent
Selection of land, the quantity of the holding tank 122 is even number in the shielding box 12, it is further preferable that in the present embodiment, the shielding
Box 12 further includes partition 124, and the partition 124 is in isolating two holding tanks 122 in the box body 121；The box body
It is formed on 121 side walls there are two the through-hole 123, the through-hole 123 is connected to the holding tank 122 one-to-one correspondence；The spiral shell
Spin line circle 11 is located in two holding tanks 122；First adapter 131 and second adapter 132 be not respectively via
The same through-hole 123 is electrically connected with the spiral winding 11.
As an example, the spiral winding 11 extends in the shape of a spiral in the holding tank 122, and it is located at two receivings
The direction of winding of the spiral winding 11 in slot 122 is opposite.The i.e. described spiral winding 11 in a holding tank 122 around
Line direction is in clockwise, then direction of winding of the spiral winding 11 in another holding tank 122 is in side counterclockwise
To.
Two holding tanks 122, the spiral winding is arranged in the shielding box 12 in the filter 1 of the invention
11 direction of winding in two holding tanks 122 when electric current flows through the spiral winding 11 on the contrary, can generate two
Reversed magnetic flux, two reversed magnetic fluxs can mutually be upset, cancel out each other, dry with the electric signal for reducing the spiral winding 11
It disturbs.
As an example, first adapter 131 may include at least one of lemo connector and BNC connector, it is described
Second adapter 132 may include at least one of lemo connector and BNC connector.The lemo connector and the BNC connector
Specific structure those skilled in the art know, be not repeated herein.
As an example, the shielding powder fills up the holding tank 122 in a manner of voidless filled, i.e., the described shielding powder is filled out
After the full holding tank 122, as far as possible without stomata in the holding tank 122.
As an example, the shielding box 12 may include but be not limited only to copper shield box, the shielding powder may include but
It is not limited only to copper powder.
As an example, the shielding powder can also include resin or AB insulative glue, in the shielding powder, the copper powder and
The resin or the mass ratio of the AB insulative glue can be 1.5:1~2.5:1.
Fig. 5 and Fig. 6 is please referred to, is compared by Fig. 5 and Fig. 6 it is found that the filter 1 of the invention passes through PNA (network
Analyzer) high-frequency signal that can effectively filter 1GHz or more at room temperature is tested, filter effect can achieve -80dB.
Embodiment two
Incorporated by reference to Fig. 1 to Fig. 4 refering to Fig. 7, the present invention also provides a kind of preparation methods of filter, described in the present embodiment
Filter preparation method preparation the filter can be but be not limited only to filter described in embodiment one, it is described
The preparation method of filter includes:
1) spiral winding is prepared, the spiral winding includes several twisted pairs, wherein the coiling of twisted pair described in half
Direction is that clockwise, the direction of winding of remaining twisted pair is counterclockwise；
2) shielding box is provided, the shielding box includes box body and lid；Wherein, it is formed with holding tank in the box body,
The through-hole being connected with the holding tank is formed on the side wall of the box body；The spiral winding is placed in the holding tank
It is interior；
3) it is connected respectively with the spiral winding both ends using adapter, by the spiral winding from the shielding box
Interior extraction；
4) shielding powder is provided, the shielding powder is filled in the box body, the shielding powder covers the spiral winding
And fill up the holding tank.
In step 1), S1 step and Fig. 2 in Fig. 7 are please referred to, prepares helix, 1, if the spiral winding 1 includes
Dry twisted pair, wherein the direction of winding of twisted pair described in half is the direction of winding of remaining twisted pair clockwise
For counterclockwise.
Include the following steps: as an example, preparing the spiral winding
1-1) configuration shielding powder；It is sufficiently stirred specifically, being mixed using the lesser solvent medium of thermal expansion coefficient with pure copper powder
It mixes uniformly as the shielding powder；Preferably, the solvent medium may include resin or AB insulating cement, the pure copper powder and institute
The mass ratio for stating resin or the AB insulating cement is 1.5:1~2.5:1；
1-2) wire rod is made using the part shielding powder；Specifically, the part shielding powder is prepared into rodlike knot
Structure obtains the wire rod after 60 DEG C of heating；
Several twisted pairs 1-3) are provided, the twisted pair is wound on the wire rod.
As an example, the spiral winding 11 is spiral winding 11 described in embodiment one, referring specifically to embodiment
One, it is not repeated herein.
In step 2), S2 step in Fig. 7 and Fig. 1, Fig. 3 are please referred to Fig. 4, a shielding box 12, the shielding are provided
Box 12 includes box body 121 and lid 125；Wherein, holding tank 122, the side wall of the box body 121 are formed in the box body 121
On be formed with the through-hole 123 being connected with the holding tank 122；The spiral winding 11 is placed in the holding tank 122.
As an example, the shielding box 12 is shielding box 12 described in embodiment one, the specific knot of the shielding box 12
Structure please refers to embodiment one, is not repeated herein.Mode of the spiral winding 11 in the holding tank 122 please refers to implementation
Example one, is not repeated herein.
In step 3), please refer to S3 step and Fig. 1 in Fig. 7, using adapter respectively with 11 liang of the spiral winding
End is connected, and the spiral winding 11 is drawn from the shielding box 12.
As an example, the adapter is adapter, the specific structure of the adapter and position described in embodiment one
The relationship of setting please refers to embodiment one, is not repeated herein.
As an example, being electrically connected after the packet paint removal at the twisted pair both ends with the adapter.
In step 4), the S4 step in Fig. 7 is please referred to, the shielding powder is provided, the shielding powder is filled in described
In box body 121, the shielding powder covers the spiral winding 11 and fills up the holding tank 122.
As an example, the shielding powder is the shielding powder prepared and retained in step 1).The shielding powder fills up described
After holding tank 122, as far as possible without stomata in the holding tank 122.Due to containing resin or AB insulating cement, institute in the shielding powder
It states after shielding powder fills up the holding tank 122, also needs to dry the flat part after (for example, naturally dry) by the lid
In 125 cappings and the box body 121, to achieve the effect that magnetic screen.
Embodiment three
Incorporated by reference to Fig. 1 to Fig. 4 refering to Fig. 8 to Fig. 9, the present invention also provides a kind of test macro, the test macro can be with
Comprehensive property test system (PPMS) is included but are not limited to, the test macro may include: cryogenic chamber 2；Dilution refrigeration
Machine (not shown), the dilution refrigeration machine are located in the cryogenic chamber 2, and the dilution refrigeration machine includes temperature end 31 and low temperature
End 32, the temperature end 31 is electrically connected with the low-temperature end 32；Sample 4 to be tested, the sample 4 to be tested are located at the low temperature
In chamber 2；Sample carrier 5, the sample carrier 5 are located in the cryogenic chamber 2, the sample carrier 5 and 4 electricity of sample to be tested
Connection；First filter 61, the first filter 61 between the sample carrier 5 and the sample to be tested 4, and with institute
It states sample carrier 5 and the sample to be tested 4 is electrically connected, as shown in Figure 8；Or the first filter 61 is located at the dilution refrigeration
The low-temperature end 32 of machine, and be electrically connected in the low-temperature end 32 of the dilution refrigeration machine with the sample carrier 5, such as Fig. 9 institute
Show；The first filter 61 may include the filter 1 as described in embodiment one；Second filter 62, second filter
Wave device 62 is electrically connected with the temperature end 31 of the dilution refrigeration machine；Third filter 63, the third filter 63 and institute
Second filter 62 is stated to be electrically connected far from one end of the dilution refrigeration machine；P-wire 7, the p-wire 7 are filtered with the third
The electrical connection of the temperature end 31 of wave device 63 and the dilution refrigeration machine；Wherein, the second filter 62 or third filter
Wave device 63 includes the filter 1 as described in embodiment one；Measuring instrument 9, the measuring instrument 9 and the second filter 62
Or the third filter 63 is electrically connected；Measurement and Control System 8, the Measurement and Control System 8 is with the p-wire 7 far from described
One end of third filter 63 and the measuring instrument 9 are electrically connected.It should be noted that with the measuring instrument in Fig. 8 and Fig. 9
9 are electrically connected as example with the second filter 62.
In one example, the second filter 62 includes the filter 1 as described in embodiment one, the measuring instrument
9 are electrically connected with the second filter 62, as can be seen from figures 8 and 9；The third filter 63 may include Pi filter.
In another example, the second filter 62 may include Pi filter；The third filter 63 includes such as
Filter 1 described in embodiment one, the measuring instrument 9 are electrically connected with the third filter 63.
Test macro provided by the invention can remove the complicated telecommunications of test equipment generation by the way that the filter is arranged
Number, heat sink effect is played, the high-frequency signal in test macro can also be removed.
In conclusion the present invention provides the preparation method of a kind of filter, test macro and filter, the filter packet
Include: spiral winding, the spiral winding include several twisted pairs, wherein the direction of winding of twisted pair described in half is up time
Needle direction, the direction of winding of remaining twisted pair are counterclockwise；Shielding box, the shielding box include box body and lid；
Wherein, it is formed with holding tank in the box body, the through-hole being connected with the holding tank is formed on the side wall of the box body；Institute
Spiral winding is stated to be located in the holding tank；The lid is covered on the box body；Adapter, the adapter include first
Adapter and the second adapter；Wherein, first adapter is located on the outside of the box body, and via the through-hole and the spiral shell
One end of spin line circle is electrically connected；Second adapter is located on the outside of the box body, and via the through-hole and the helix
The other end of circle is electrically connected；Powder is shielded, the shielding powder covers the spiral winding and fills up the holding tank.Present invention filtering
The spiral winding of device includes the twisted pair that several direction of windings are not quite similar, and spiral winding is put in shielding box and by shielding
Shielding box is filled up in powder covering, and shielding powder can come into full contact with spiral winding, to filter the high frequency letter in removal test macro
Number；Shielding box can shield magnetic disturbance of the extraneous magnetic signal to spiral winding, to avoid impacting test signal；This hair
The noise filtering effect of bright filter can achieve -80dB to -100dB；The present invention is effective by small size integrated coil
Save filter space, in conjunction with photoetching process can effectively reduction filter volume, adapt to various small extremely low temperature
Cavity；In addition the present invention also has many advantages, such as low cost, low manufacture difficulty；Shielding box in filter of the invention is arranged two
Holding tank, direction of winding of the spiral winding in two holding tanks is on the contrary, can the generation when electric current flows through the spiral winding
Two reversed magnetic fluxs, two reversed magnetic fluxs can mutually be upset, cancel out each other, to reduce the electric signal of the spiral winding
Interference；Test macro provided by the invention can remove the complicated electric signal of test equipment generation by the setting filter,
Heat sink effect is played, the high-frequency signal in test macro can also be removed.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (13)
1. a kind of filter, which is characterized in that the filter includes:
Spiral winding, the spiral winding include several twisted pairs, wherein the direction of winding of twisted pair described in half is up time
Needle direction, the direction of winding of remaining twisted pair are counterclockwise；
Shielding box, the shielding box include box body and lid；Wherein, holding tank, the side of the box body are formed in the box body
The through-hole being connected with the holding tank is formed on wall；The spiral winding is located in the holding tank；The lid capping
In on the box body；
Adapter, the adapter include the first adapter and the second adapter；Wherein, first adapter is located at the box
External side, and be electrically connected via the through-hole with one end of the spiral winding；Second adapter is located at outside the box body
Side, and be electrically connected via the through-hole with the other end of the spiral winding；
Powder is shielded, the shielding powder covers the spiral winding and fills up the holding tank.
2. filter according to claim 1, which is characterized in that the length of the spiral winding is 2 meters~3 meters.
3. filter according to claim 1, which is characterized in that in the spiral winding, the adjacent twisted pair around
To contrary.
4. filter according to claim 1, which is characterized in that the shielding box further includes partition, and the partition is in institute
It states and isolates two holding tanks in box body；Formed on the box side wall there are two the through-hole, the through-hole with it is described
Holding tank corresponds connection；The spiral winding is located in two holding tanks；First adapter and second turn described
Connector is electrically connected via the different through-holes with the spiral winding respectively.
5. filter according to claim 4, which is characterized in that the spiral winding in the holding tank in the shape of a spiral
The direction of winding for the spiral winding for extending, and being located in two holding tanks is opposite.
6. filter according to claim 1, which is characterized in that first adapter includes that lemo connector and BNC connect
At least one of head, second adapter includes at least one of lemo connector and BNC connector.
7. filter according to claim 1, which is characterized in that the shielding box includes copper shield box, the shielding powder
Including copper powder.
8. filter according to claim 7, which is characterized in that the shielding powder further includes resin or AB insulative glue,
In the shielding powder, the copper powder and the resin or the mass ratio of the AB insulative glue are 1.5:1~2.5:1.
9. a kind of preparation method of filter, which is characterized in that the preparation method of the filter includes:
Spiral winding is prepared, the spiral winding includes several twisted pairs, wherein the direction of winding of twisted pair described in half is
Clockwise, the direction of winding of remaining twisted pair is counterclockwise；
A shielding box is provided, the shielding box includes box body and lid；Wherein, holding tank, the box are formed in the box body
The through-hole being connected with the holding tank is formed on the side wall of body；The spiral winding is placed in the holding tank；
It is connected respectively with the spiral winding both ends using adapter, the spiral winding is drawn from the shielding box
Out；
Shielding powder is provided, the shielding powder is filled in the box body, the shielding powder covers the spiral winding and fills up
The holding tank.
10. the preparation method of filter according to claim 9, which is characterized in that preparing the spiral winding includes such as
Lower step:
Configure the shielding powder；
Wire rod is made using the part shielding powder；
Several twisted pairs are provided, the twisted pair is wound on the wire rod.
11. a kind of test macro, which is characterized in that the test macro includes:
Cryogenic chamber；
Dilution refrigeration machine is located in the cryogenic chamber, and the dilution refrigeration machine includes temperature end and low-temperature end, the temperature end
It is electrically connected with the low-temperature end；
Sample to be tested is located in the cryogenic chamber；
Sample carrier is located in the cryogenic chamber, is electrically connected with the sample to be tested；
First filter, between the sample carrier and the sample to be tested, and with the sample carrier and described to be detected
Sample electrical connection；Or the low-temperature end positioned at the dilution refrigeration machine, and the low-temperature end of the dilution refrigeration machine with
The sample carrier electrical connection；The first filter includes such as filter described in any item of the claim 1 to 8；
Second filter is electrically connected with the temperature end of the dilution refrigeration machine；
Third filter is electrically connected with the second filter far from one end of the dilution refrigeration machine；
P-wire is electrically connected with the temperature end of the third filter and the dilution refrigeration machine；Wherein, second filter
Wave device or the third filter include such as filter described in any item of the claim 1 to 8；
Measuring instrument is electrically connected with the second filter or the third filter；
Measurement and Control System, one end and the measuring instrument with the p-wire far from the third filter are electrically connected.
12. test macro according to claim 11, which is characterized in that the second filter includes such as claim 1
To filter described in any one of 8, the measuring instrument is electrically connected with the second filter；The third filter includes
Pi filter.
13. test macro according to claim 11, which is characterized in that the second filter includes Pi filter；Institute
Stating third filter includes such as filter described in any item of the claim 1 to 8, the measuring instrument and third filtering
Device electrical connection.
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| CN201910142222.XA CN109712777B (en) | 2019-02-26 | 2019-02-26 | Filter, test system and preparation method of filter |
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| CN201910142222.XA CN109712777B (en) | 2019-02-26 | 2019-02-26 | Filter, test system and preparation method of filter |
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| CN109712777B CN109712777B (en) | 2023-11-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112786410A (en) * | 2020-12-30 | 2021-05-11 | 广东美的白色家电技术创新中心有限公司 | Magnetron filtering component, magnetron and household appliance |
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| CN202102827U (en) * | 2011-03-03 | 2012-01-04 | 番禺得意精密电子工业有限公司 | Wave filter |
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| CN209328648U (en) * | 2019-02-26 | 2019-08-30 | 中国科学院上海微系统与信息技术研究所 | Filter and test macro |
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| US5036302A (en) * | 1989-06-19 | 1991-07-30 | U.S. Philips Corporation | Radio receiver filter with image rejection |
| CN1412943A (en) * | 2001-10-10 | 2003-04-23 | 雅马哈株式会社 | Bridging load output class D amplifier using filter coil and low pass electric filter |
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| CN112786410A (en) * | 2020-12-30 | 2021-05-11 | 广东美的白色家电技术创新中心有限公司 | Magnetron filtering component, magnetron and household appliance |
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|---|---|
| CN109712777B (en) | 2023-11-24 |
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