CN104297572B - Low-loss material dielectric property measurement device adopting split-cylinder resonator method - Google Patents
Low-loss material dielectric property measurement device adopting split-cylinder resonator method Download PDFInfo
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Abstract
The invention provides a low-loss material dielectric property measurement device adopting a split-cylinder resonator method. The low-loss material dielectric property measurement device adopting the split-cylinder resonator method comprises a base plate, a fixed cavity, a movable cavity, a supporting seat, a force moment handle, a lower guide rod, a precise linear bearing, an upper guide rod, a locking screw, a coaxial connector, a positioning pin, a connecting plate, a protective plate and a stop block. By means of the scheme, the theoretical advantage that the accuracy of low-loss material dielectric property measurement by means of the split-cylinder resonator method is high can be fully played. In addition, measured samples are simple in preparation and quick and convenient to measure. For different measured samples, clamping forces of two resonant cavities can be adjusted through the force moment handle, accordingly measurement distortion caused by improper clamping is decreased, and measurement accuracy is ensured. For the same samples, the clamping forces are constant, and consistency of measurement results can be ensured.
Description
Technical field
The invention belongs to technical field, more particularly, to a kind of split cylinder resonator method low-loss material dielectric property survey
Amount device.
Background technology
The design and fabrication of microwave circuit, microwave component etc. is required for accurately knowing the dielectric property of material therefor in advance,
Therefore dielectric material feature measurement technology plays important role in microwave engineering field.According to different measuring principles,
Dielectric material feature measurement can be divided into transmission/bounce technique, Resonant-cavity Method, single port method etc. different classes of.For low-loss thing
The dielectric property measurement of matter, Resonant-cavity Method certainty of measurement is higher, thus widely used in Practical Project.
Resonant-cavity Method dielectric material feature measurement can be divided into closed and split type two kinds again.Closed Resonant-cavity Method need by
Accurate in size sample is put as in closing resonator, and the little deviation because of the installation of sample, size, shape may result in relatively
Big measure error, thus be difficult to practical engineering application.For this reason, develop one kind on the basis of closing resonant theory again
Split type cylindrical Resonant-cavity Method.Split type cylindrical Resonant-cavity Method is made up of two identical circular cylindrical cavities, as Fig. 1 institute
Show.During measurement, by specimen holder between two and half cavitys, equipped with coupling ring on two halves cavity wall, connected by waveguide or adapter
Connect test system.In theory, this method has the advantages that sample preparation is simple, it is convenient to measure.However, actually used process
In, two and half cavitys need to be accurately positioned, and do not allow dislocation or tilt, and two cavity clamping forces are excessive, too small equal shadow
Ring measurement.Often there is this respect in existing measurement apparatus, thus leading to that certainty of measurement is high, uniformity is poor, right
The problems such as sample size adaptability is strong.Therefore, Split type cylindrical Resonant-cavity Method dielectric material feature measurement sample preparation
Simply, the theory advantage such as measurement convenience, certainty of measurement height is restricted.
According to different measuring principles, dielectric material feature measurement mainly has transmission/bounce technique, Resonant-cavity Method, single port
Method etc..Wherein, for the measurement of low-loss substance dielectric constant, high due to having the advantages that certainty of measurement, Resonant-cavity Method is applied
Extensively.Resonant-cavity Method dielectric material characteristic measuring device can be divided into closed measurement apparatus and split type measurement apparatus again.Because of envelope
Enclosed Resonant-cavity Method is extremely strict to the installation of sample, size, shape need, usual Resonant-cavity Method dielectric property measurement master
To adopt split type.At present, the common measurement apparatus of Split type cylindrical Resonant-cavity Method mainly have two kinds：
Wherein, the better simply a kind of device adopting in laboratory is only made up of two resonators, and two resonators pass through bolt
Fixing, the sample of moderate dimensions is sandwiched between two resonators.After manually adjusting two resonator alignment, tightened using suitable moment
Bolt makes two resonator clamping samples, and the waveguide by being contained on resonator or adapter connecting test system.
Additionally, it is involved in the patent (patent No. 201030655645.1) of Hunan Zhenhua Analytical Instrument Co., Ltd application
Be a kind of based on micrometer transformation measurement apparatus.It mainly a resonator is fixed on bearing, by thousand
The spiral micrometer bar dividing chi promotes another resonator (movable chamber) to move, and finally realizes two resonators and clamps sample, equally
It is also the waveguide by being contained on resonator or adapter connecting test system.
For the device being bolted two resonators adopting in laboratory, because two split resonators need manually
Adjust its alignment, measurement uniformity is poor, less efficient, using inconvenience.Be only applicable in the lab simple application it is difficult to enter
Row commercialization is promoted.
Dielectric material characteristic measuring device based on micrometer transformation is generally by one of resonator (movable chamber)
Fix with the spiral micrometer bar of micrometer, the overall structure of measurement apparatus is limited to the structure of micrometer, the thrust of micrometer
Adjusting range is limited, not strong for the material category of sample, size adaptability.And micrometer micrometric screw exists between transmission
Gap, in the presence of movable chamber deadweight, two resonator alignment accuracy are difficult to ensure that, and then affect certainty of measurement.
Therefore, prior art existing defects, need to improve.
Content of the invention
The technical problem to be solved is for the deficiencies in the prior art, provides a kind of split cylinder resonator method
Low-loss material device for measuring dielectric characteristics.
Technical scheme is as follows：
A kind of split cylinder resonator method low-loss material device for measuring dielectric characteristics, wherein, including base plate, lock chamber,
Movable chamber, support base, moment handle, lower guide rod, precision linear bearing, top guide bar, lock-screw, coaxial connector, alignment pin
Nail, connecting plate, protective plate, block；Described lock chamber, support base adopt shop bolt location and installation on base plate, for ensureing
Lock chamber, the assembly precision of support base；Described lower guide rod, top guide bar are installed between support base and lock chamber；Setting lower guide rod
Fixing, top guide bar activity, top guide bar is locked by lock-screw；Described movable chamber is installed on top guide bar and lower guide rod, passes through
Top guide bar and lower guide rod guiding are it is ensured that movable chamber and lock chamber accurate alignment；Described moment handle is installed on support base, passes through
Connecting plate, protective plate, block drive movable chamber motion；Described precision linear bearing is installed in movable chamber, is used for guaranteeing activity
Chamber easy motion；Described coaxial connector is installed on movable chamber and lock chamber side, during measurement, sample is clipped in lock chamber
And movable chamber between, rotating torque handle, moment handle pushes movable chamber, compresses sample with constant confining force, passes through
Coaxial connector connecting test system.
Described split cylinder resonator method low-loss material device for measuring dielectric characteristics, wherein, described lock chamber and institute
Stating movable chamber is microwave cavity；The cavity material of described microwave cavity is brass sheet electroplating mild alloy.
Described split cylinder resonator method low-loss material device for measuring dielectric characteristics, wherein, the three of described top guide bar
Duan Taijie, first step and support base adopt interference fits, and equipped with holddown spring, the 3rd step is used for installing tension second step
Handle.
Described split cylinder resonator method low-loss material device for measuring dielectric characteristics, wherein, by handle by lead
Bar pulls out certain distance, and using lock-screw locking, exceeds distance between top guide bar, lower guide rod for direct measurement size
Sample.
Described split cylinder resonator method low-loss material device for measuring dielectric characteristics, wherein, described moment handle with
Described support base adopts screw-driven.
Described split cylinder resonator method low-loss material device for measuring dielectric characteristics, wherein, overcoat in moment handle
Cylinder three arc grooves of setting, screw rod end correspondence position has three circular holes, and the steel ball for transmission passes through spring and push rod pressure
Tightly；When less than confining force, outer sleeve passes through the threaded rotation of steel ball band；When more than confining force, steel ball departs from arc groove, outward
Sleeve is separated with screw rod.
Described split cylinder resonator method low-loss material device for measuring dielectric characteristics, wherein, moment handle with activity
Chamber is connected with block using connecting plate, and block and screw rod adopt rectangular channel to assemble, and are used for preventing block in rotation process from coming off.
Described split cylinder resonator method low-loss material device for measuring dielectric characteristics, wherein, described moment handle with
One protective plate is set between described activity cavity, and described protective plate has groove for inner side, described groove is used for the pressure of buffer screw stem
The resonator Inward deflection that clamp force causes, to improve the service life of certainty of measurement and device.
Advantages below is had using such scheme：
1st, lock chamber of the present invention, bearing are accurately positioned using pin；Movable chamber is provided with precision linear bearing.Device is overall
Stable movement, both level can use it is also possible to vertical use, can improve property easy to use and measurement efficiency.And adopt two
Guide rod guiding it can be ensured that two resonator accurate alignment, thus improving certainty of measurement.
2nd, top guide bar adopts the structure design of three sections of steps, while playing accurate guiding, guide rod is pulled out and uses spiral shell
Nail locking, can be convenient for measuring larger-size sample, improve the size adaptability to sample.
3rd, movable chamber motion and clamping sample are realized using moment handle.For different samples, permissible
The lock chamber and movable chamber clamping force to sample is adjusted by moment handle, thus reducing the improper measurement distortion causing of clamping,
Ensure certainty of measurement.And for sample of the same race, clamping force constant it is ensured that the uniformity of measurement result.
4th, it is designed with protective plate, the Inward deflection of movable chamber during can preventing from using, while improving certainty of measurement,
Product service life can be improved.
Brief description
Fig. 1 is Split type cylindrical resonant cavity method schematic diagram in prior art.
Fig. 2 is the overall structure diagram of apparatus of the present invention.
Fig. 3 is top guide bar bearing assembling schematic diagram in apparatus of the present invention.
Fig. 4 is moment handle structural representation in apparatus of the present invention.
Fig. 5 is moment handle and movable chamber connection diagram in apparatus of the present invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
Fig. 2 show a kind of entirety knot of present invention split cylinder resonator method low-loss material device for measuring dielectric characteristics
Structure.Its mainly by base plate 1, lock chamber 2, movable chamber 3, support base 4, moment handle 5, lower guide rod 6, precision linear bearing 7, on lead
Bar 8, lock-screw 9, coaxial connector 10, shop bolt 11, connecting plate 12, protective plate 13, block composition.In measurement process,
Sample is clipped between fixed cavity 2 and movable chamber 3, rotating torque handle 5, and moment handle 5 pushes movable chamber 3, and finally
Sample is compressed with constant confining force.The coaxial connector 10 being installed on two resonator sides can convenient connecting test system
System.Described lock chamber 2, support base 4 adopt shop bolt 11 location and installation on base plate 1, for ensureing lock chamber 2, support base 4
Assembly precision；Described lower guide rod 6, top guide bar 8 are installed between support base 4 and lock chamber 2；Setting lower guide rod 6 is fixing, above leads
Bar 8 activity, top guide bar 8 is locked by lock-screw 9；Described movable chamber 3 is installed on top guide bar 8 and lower guide rod 6, by above leading
Bar 8 and lower guide rod 6 guide it is ensured that movable chamber 3 and lock chamber 2 accurate alignment；Described moment handle 5 is installed on support base 4, leads to
Cross connecting plate 12, protective plate 13, block drive movable chamber 3 move；Described precision linear axis 7 hold and are installed in movable chamber 3, are used for
Guarantee movable chamber 3 easy motion；Described coaxial connector 10 is installed on movable chamber 3 and lock chamber 2 side, during measurement, will be tested
Specimen holder between lock chamber 2 and movable chamber 3, rotating torque handle 5, moment handle 5 pushes movable chamber 3, with constant holding
Defeat tight sample, by coaxial connector 10 connecting test system.
In above-mentioned, described lock chamber 2 and described movable chamber 3 are microwave cavity；The cavity material of described microwave cavity
For brass sheet electroplating mild alloy.
In above-mentioned, three sections of steps of described top guide bar 8, first step and support base 4 adopt interference fits, and second step fills
There is holddown spring, the 3rd step is used for installing binding lever.
In above-mentioned, top guide bar 8 is pulled out by certain distance by handle, and locked using lock-screw 9, for direct measurement
Size exceeds the sample of distance between top guide bar, lower guide rod.
In above-mentioned, described moment handle 5 adopts screw-driven with described support base 4.
In above-mentioned, in moment handle 5, outer sleeve arranges three arc grooves, and screw rod end correspondence position has three circular holes,
Steel ball for transmission passes through spring and push rod compression；When less than confining force, outer sleeve passes through the threaded rotation of steel ball band；When
During more than confining force, steel ball departs from arc groove, and outer sleeve is separated with screw rod.
In above-mentioned, moment handle 5 is connected with block using connecting plate 12 with movable chamber 3, and block and screw rod adopt rectangular channel
Assembling, is used for preventing block in rotation process from coming off.
In above-mentioned, a protective plate 13 is set between described moment handle 5 and described activity cavity 3, described protective plate 13 is interior
Side has groove, and described groove is used for the resonator Inward deflection that causes of thrust of buffer screw stem, with improve certainty of measurement with
And the service life of device.
Lock chamber 2, movable chamber 3 are microwave cavity, and for ensureing signal transmission reliability, the material of cavity is for brass sheet simultaneously
Electroplating mild alloy.Lock chamber 2, support base 4 adopt pin 11 location and installation it is ensured that the dress of lock chamber 2, support base 4 on base plate 1
Join precision.Movable chamber 3 is provided with precision linear bearing 7, by lower guide rod 6, top guide bar 8, movable chamber 7 can easy motion, and with
Lock chamber 2 accurate alignment, thus measurement result uniformity and certainty of measurement can be ensured.
Lower guide rod 6 is fixing with base plate 1 and lock chamber 2.Top guide bar 8 is as shown in Figure 3 with the assembling schematic diagram of support base 4.On
Guide rod 8 is designed with three sections of steps, and first step 31 and support base 4 adopt interference fits, second step 32 equipped with holddown spring, the
Three steps 33 are used for installing binding lever.It is fitted close with bearing using this design one side top guide bar, resonator can be made accurate
Really align, thus ensureing to measure uniformity and certainty of measurement；On the other hand top guide bar 8 is pulled out by certain distance by handle, and
Using locking nail locking, larger-size sample can be convenient for measuring, thus improving the size adaptability of sample.
Moment handle and support base adopt screw-driven, and its structure is as shown in Figure 4.Outer sleeve 42 is designed with three circular arcs
Groove, screw rod end correspondence position has three circular holes, and the steel ball 43 being used for transmission therebetween passes through spring 45, push rod 44 compresses.Little
When confining force, outer sleeve 42 carries threaded 41 rotations by steel ball 43；During more than confining force, steel ball departs from arc groove, overcoat
Cylinder 42 is separated with screw rod 41.Sample can be protected by moment handle one side, prevent thrust excessive, sample is damaged by pressure；
On the other hand can ensure that two resonator clamping forces are constant, and then ensure the uniformity of measurement result.Additionally, confining force is adjusted can lead to
Cross and tighten, loosen nut 46 or change spring 45 and realize, adjustment is simple, adjusting range is big, strong adaptability.
As shown in figure 5, moment handle is connected with block 54 using connecting plate 52 with movable chamber 55, block 54 is adopted with screw rod 53
With rectangular channel assembling, can prevent block 54 in rotation process from coming off, improve product reliability.It is to prevent Long-Time Service process simultaneously
Middle block 54 compression movable chamber 55 causes Inward deflection, affects certainty of measurement, is designed with protective plate 51, it is characterized by inner side has
Groove, for buffer screw stem thrust cause resonator deformation, certainty of measurement and the service life of device can be improved.
On the basis of the above, furthermore：
1st, lock chamber, movable chamber are microwave cavity, for ensureing the reliability of signal transmission and the accuracy of measurement, cavity
Material be brass sheet electroplating mild alloy.
2nd, lock chamber, bearing are positioned using pin and are accurately installed with base plate.Movable chamber is provided with precision linear bearing, leads to
Cross lower guide rod, movable chamber can easy motion, and guarantee and lock chamber accurate alignment；
3rd, top guide bar is designed with three sections of steps, while playing accurate guiding, pull bar is pulled out and uses screw lock, can
It is convenient for measuring larger-size sample.
4th, the turning moment of moment handle can easily adjust, so that it is guaranteed that movable chamber is suitable with the clamping force of lock chamber.
And clamping force constant it is ensured that the uniformity of measurement result.
5th, have groove inside the protective plate between moment handle and activity cavity, can eliminate what screw-pressing movable chamber caused
Inward deflection.
In the present invention：
1st, apparatus of the present invention overall structure is rational in infrastructure, is fixed using two ends, the version of intermediate active.Both end of which
For lock chamber and bearing, both of which is accurately positioned with base by pin；Middle is movable chamber, and movable chamber is provided with accurate straight line
Bearing, by upper and lower two guide rods can easy motion, and with lock chamber registration it is ensured that certainty of measurement.For different
Frequency range, the overall dimensions of measurement apparatus can be different, but version is constant.
2nd, two guide rods adopt a fixation, another movable version.While ensureing guiding accuracy, will
Moveable combination of guide rod is extracted certain distance out and is adopted screw lock, can measure larger-size sample, and the size improving sample is fitted
Ying Xing.
3rd, the motion of movable chamber is realized by moment handle, after reaching confining force, moment handle no longer produce moment it is ensured that
Resonator is moderate to the clamping force of sample, thus reducing because clamping the improper measurement distortion causing.And for sample of the same race,
Clamping force constant it is ensured that the uniformity of measurement result.The specific constructive form of moment handle can be different, but its holding torque
Need to there is wider adjusting range, the adjustment mode of simplicity, to adapt to different samples.
Advantages below is had using such scheme：
1st, lock chamber of the present invention, bearing are accurately positioned using pin；Movable chamber is provided with precision linear bearing.Device is overall
Stable movement, both level can use it is also possible to vertical use, can improve property easy to use and measurement efficiency.And adopt two
Guide rod guiding it can be ensured that two resonator accurate alignment, thus improving certainty of measurement.
2nd, top guide bar adopts the structure design of three sections of steps, while playing accurate guiding, guide rod is pulled out and uses spiral shell
Nail locking, can be convenient for measuring larger-size sample, improve the size adaptability to sample.
3rd, movable chamber motion and clamping sample are realized using moment handle.For different samples, permissible
The lock chamber and movable chamber clamping force to sample is adjusted by moment handle, thus reducing the improper measurement distortion causing of clamping,
Ensure certainty of measurement.And for sample of the same race, clamping force constant it is ensured that the uniformity of measurement result.
4th, it is designed with protective plate, the Inward deflection of movable chamber during can preventing from using, while improving certainty of measurement,
Product service life can be improved.
It should be appreciated that for those of ordinary skills, can be improved according to the above description or be converted,
And all these modifications and variations all should belong to the protection domain of claims of the present invention.
Claims (8)
1. a kind of split cylinder resonator method low-loss material device for measuring dielectric characteristics is it is characterised in that include base plate, fixation
Chamber, movable chamber, support base, moment handle, lower guide rod, precision linear bearing, top guide bar, lock-screw, coaxial connector, positioning
Pin, connecting plate, protective plate and block；Described lock chamber, support base adopt shop bolt location and installation on base plate, for protecting
Card lock chamber, the assembly precision of support base；Described lower guide rod and top guide bar are installed between support base and lock chamber；Lead under setting
Bar is fixed, top guide bar activity, and top guide bar is locked by lock-screw；Described movable chamber is installed on top guide bar and lower guide rod, leads to
Cross top guide bar and lower guide rod guiding it is ensured that movable chamber and lock chamber accurate alignment；Described moment handle is installed on support base, leads to
Cross connecting plate, protective plate and block and drive movable chamber motion；Described precision linear bearing is installed in movable chamber, is used for guaranteeing to live
Dynamic chamber easy motion；Described coaxial connector is installed on movable chamber and lock chamber side, during measurement, sample is clipped in fixation
Between chamber and movable chamber, rotating torque handle, moment handle pushes movable chamber, compresses sample with constant confining force, leads to
Cross coaxial connector connecting test system.
2. split cylinder resonator method low-loss material device for measuring dielectric characteristics as claimed in claim 1 it is characterised in that
Described lock chamber and described movable chamber are microwave cavity；The cavity material of described microwave cavity is brass sheet and electroplates soft
Gold.
3. split cylinder resonator method low-loss material device for measuring dielectric characteristics as claimed in claim 2 it is characterised in that
Described top guide bar has three sections of steps, and first step and support base adopt interference fits, second step equipped with holddown spring, the 3rd
Step is used for installing binding lever.
4. split cylinder resonator method low-loss material device for measuring dielectric characteristics as claimed in claim 3 it is characterised in that
Top guide bar is pulled out by certain distance by handle, and using lock-screw locking, for direct measurement size exceed top guide bar, under
The sample of distance between guide rod.
5. split cylinder resonator method low-loss material device for measuring dielectric characteristics as claimed in claim 2 it is characterised in that
Described moment handle and described support base adopt screw-driven.
6. split cylinder resonator method low-loss material device for measuring dielectric characteristics as claimed in claim 2 it is characterised in that
In moment handle, outer sleeve arranges three arc grooves, and screw rod end correspondence position has three circular holes, and the steel ball for transmission leads to
Cross spring and push rod compression；When less than confining force, outer sleeve passes through the threaded rotation of steel ball band；When more than confining force, steel
Ball departs from arc groove, and outer sleeve is separated with screw rod.
7. split cylinder resonator method low-loss material device for measuring dielectric characteristics as claimed in claim 2 it is characterised in that
Moment handle is connected with block using connecting plate with movable chamber, and block and screw rod adopt rectangular channel to assemble, and are used for preventing from rotating
In journey, block comes off.
8. split cylinder resonator method low-loss material device for measuring dielectric characteristics as claimed in claim 2 it is characterised in that
One protective plate is set between described moment handle and described activity cavity, and described protective plate has groove for inner side, described groove is used
The resonator Inward deflection causing in the thrust of buffer screw stem, to improve the service life of certainty of measurement and device.
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| CN105116234B (en) * | 2015-09-07 | 2018-04-10 | 工业和信息化部电子工业标准化研究院 | The multi-frequency range measurement apparatus and system of the complex dielectric permittivity of microwave dielectric material |
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Effective date of registration: 20190312 Address after: 266000 No. 98 Xiangjiang Road, Huangdao District, Qingdao City, Shandong Province Patentee after: China Electronics Technology Instrument and Meter Co., Ltd. Address before: 266555 No. 98 Xiangjiang Road, Qingdao economic and Technological Development Zone, Shandong Patentee before: The 41st Institute of CETC |
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Address after: Huangdao Xiangjiang Road 266555 Shandong city of Qingdao Province, No. 98 Patentee after: CLP kesiyi Technology Co.,Ltd. Address before: 266000 No. 98 Xiangjiang Road, Huangdao District, Shandong, Qingdao Patentee before: CHINA ELECTRONIC TECHNOLOGY INSTRUMENTS Co.,Ltd. |