CN203658565U - Test fixture for measurement of ferromagnetic resonance parameters - Google Patents
Test fixture for measurement of ferromagnetic resonance parameters Download PDFInfo
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- CN203658565U CN203658565U CN201320816276.8U CN201320816276U CN203658565U CN 203658565 U CN203658565 U CN 203658565U CN 201320816276 U CN201320816276 U CN 201320816276U CN 203658565 U CN203658565 U CN 203658565U
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- shell
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- test fixture
- planar waveguide
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Abstract
The utility model discloses a test fixture for the measurement of ferromagnetic resonance parameters, which comprises a shell, a test joint and a coplanar waveguide fixed in the shell. The top surface of the shell is provided with a test hole for positioning a to-be-tested product. The left and right side surfaces of the shell are respectively provided with a mounting hole used for mounting the test joint. The inner conductor of the test joint is arranged to pass through the mounting holes in the shell to be in contact connection with the inner conductor of the coplanar waveguide fixed in the shell. The coplanar waveguide comprises a signal wire and two grounding wires arranged in parallel at the two sides of the signal wire. The middle section of the signal wire is inverted S-shaped, and the width of the inverted S-shaped middle section of the signal wire is 0.25 mm. The widths of the two ends of the signal wire are 0.4 mm. The distance between each grounding wire and the signal wire is 0.1 mm. The two ends of the coplanar waveguide are also provided with patch plugs used for realizing the conversion connection of the coplanar waveguide with a coaxial cable. The test fixture is small and compact in structure and can be easily and effectively fixed. Meanwhile, the measurement sensitivity is further improved.
Description
Technical field
The utility model relates to the test fixture that a kind of ferromagnetic resonance parameter measurement is used.
Background technology
Solid, under the acting in conjunction of stationary magnetic field and microwave field, can produce the resonance absorption phenomenon to microwave field near a certain frequency.Ferromagnetic proving installation is in the time measuring the resonance parameter of ferromagnetic material, need to make testing sample realize precise positioning by test fixture, whole fixture is fixed in magnetic field, and provide the input interface of pumping signal and the output interface of response signal, and the co-planar waveguide of realizing signal transmission in test requires highly sensitive, and standing-wave ratio (SWR) is little; Co-planar waveguide microwave path does not affect test magnetic field.But, existing test fixture, structure is comparatively complicated, be difficult for fixing, thereby it is not high to cause measuring sensitivity.Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of structure small and exquisite, is easy to fix, and has the test fixture of using for measuring ferromagnetic resonance parameter of high measurement sensitivity.
For achieving the above object, the utility model is achieved through the following technical solutions:
The test fixture that a kind of ferromagnetic resonance parameter measurement is used, comprise shell, test splice and be fixed on the co-planar waveguide in shell, the end face of described shell has an instrument connection that sample is positioned, its two sides, left and right are respectively formed with a mounting hole for installation testing joint, and its leading flank has a pickup groove for fixing test probe; The inner wire of described test splice is connected through the mounting hole of shell and the contact of the inner wire of the co-planar waveguide in shell; Described co-planar waveguide comprises signal wire and parallel two ground wires being located at its both sides, the interlude of described signal wire is the type of falling S, and the width of the signal wire of the middle section of falling S is 0.25mm, the live width at signal wire two ends is 0.4mm, the distance of signal wire and ground wire is 0.1mm, and the two ends of described co-planar waveguide are also provided with realizes the plug that co-planar waveguide turns to the conversion of concentric cable.
Preferably: described signal wire is that characteristic impedance is the co-planar waveguide microstrip line of 50 Ω.
Preferably: the substrate of described co-planar waveguide is the high resistance GaAs substrate of thickness 0.3mm.
Preferably: the substrate surface of described co-planar waveguide is coated with gold layer.
Preferably: described test splice is sub-miniature A connector.
Preferably: described test splice is installed on the mounting hole place of shell by a connecting seat, described Connection Block is inverted L shape, comprise orthogonal horizontal base and vertical seat, the center of described vertical seat end face is provided with a conductor bores of passing for the inner wire of test splice, on the medial surface of described vertical seat, is also provided with a longitudinal draw-in groove.
Preferably: described Connection Block is copper Connection Block, and its surface is silver coated.
Preferably: described shell comprises top board, header board, rear plate and base, described base by an orthogonal horizontal block and vertically T-shaped of forming of piece and be symmetrically set in horizontal block below, vertically a pair of ladder block of piece both sides combines, described co-planar waveguide is fixed on the end face of T-shaped, and the width of described T-shaped is less than the width of ladder block; Described forward and backward plate is arranged on the first cascaded surface of ladder block by securing member respectively, and described header board is corresponding to the vertical piece place of T-shaped, from bottom vertical be upwards provided with one with the suitable longitudinal opening of vertical piece size; The center of described top board is provided with an instrument connection that runs through top board upper and lower surface, and top board lower surface is each downward formation one projection also at two ends, left and right along its length, make each mounting hole for installation testing joint that forms on the side, two of left and right of the shell after connecting.
Preferably: described test fixture also comprise be located at first stage face top, horizontal block both sides, for intermediate plate and the Working-Clip seat of fixing co-planar waveguide, the upper surface of described Working-Clip seat is formed with one downwards for placing the heavy stand of intermediate plate, described Working-Clip seat relatively with horizontal block lateral surface on be also provided with one with the suitable fixture block of longitudinal draw-in groove.
Preferably: described measured material is provided with the high frequency sheet material part at shielding co-planar waveguide and place, reduce the shielding copper box of test noise.
The beneficial effects of the utility model are, test fixture of the present utility model have structure small and exquisite, be easy to effectively fixing etc. specific, while being applied to ferromagnetic resonance parameter testing, due to the given shape of co-planar waveguide signal wire, not only guarantee the matched well of microwave junction and signal line impedance, and further promoted measurement sensitivity.
Accompanying drawing explanation
Fig. 1 shows the outside drawing of test fixture described in the utility model, wherein, and the front elevation that Fig. 1 a is test fixture, the rear view that Fig. 1 b is test fixture;
Fig. 2 shows the decomposing schematic representation of test fixture described in the utility model;
Fig. 3 shows test fixture described in the utility model and removes the inner structure schematic diagram after shell;
Fig. 4 shows the structural representation of co-planar waveguide circuit board in test fixture described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.
As Figure 1-Figure 4, the test fixture that ferromagnetic resonance parameter measurement described in the utility model is used, comprise shell 1, test splice 2 and be fixed on the co-planar waveguide 3 in shell 1, wherein, described shell 1 is by top board 11, header board 12, rear plate 13 and base 14 form as screw is connected and fixed by securing member, described base 14 is by an orthogonal horizontal block and vertical T-shaped 141 of forming of piece and be symmetrically set in horizontal block below, vertically a pair of ladder block 142 of piece both sides combines, and the width of described T-shaped 141 is less than the width of ladder block 142, before described, rear plate is arranged on the first cascaded surface 1421 of ladder block 142 by screw respectively, described header board 11 is corresponding to the vertical piece place of T-shaped 141, from bottom vertical be upwards provided with one with the suitable longitudinal opening 121 of vertical piece size, thereby the leading flank that makes the shell 1 after connecting is formed with a pickup groove for fixing test probe, the center of described top board 11 is provided with an instrument connection 111 that runs through top board 11 upper and lower surfaces, top board 11 lower surfaces are each downward formation one projection 112 also at two ends, left and right along its length, make each mounting hole for installation testing joint that forms on the side, two of left and right of shell 1 after connecting, that is: described shell 1 by securing member if screw is by top board 11, header board 12, after rear plate 13 and base 14 correspondences have connected, the end face of shell 1 has a pair of sample carries out the instrument connection 111 of precise positioning, two sides, left and right respectively have a mounting hole, its leading flank forms a pickup groove for fixing test probe.
The preferred sub-miniature A connector of described test splice 2, in the utility model, be provided with altogether 1 pair, be arranged at respectively the mounting hole place of shell 1 by Connection Block 21, described Connection Block 21 is inverted L shape, comprise orthogonal horizontal base 211 and vertical seat 212, wherein, the center of described vertical seat 212 end faces is provided with a conductor bores of passing for the inner wire of test splice 2, on the medial surface of described vertical seat 212, is also provided with a longitudinal draw-in groove (not shown).In the present embodiment, the inner wire of sub-miniature A connector is connected with the inner wire contact of co-planar waveguide 3 joints through the conductor bores on vertical seat 212, and by for example screw of securing member, sub-miniature A connector and Connection Block 21 is fixed.
Co-planar waveguide 3 is located between two Connection Blocks 21, and is fixed on by screw on the upper end face of T-shaped 141 of base 14, and patchplug is equipped with at its two ends, realizes the conversion of co-planar waveguide to concentric cable, for transmitting pumping signal and response signal.As shown in Figure 4, described co-planar waveguide 3 select thickness be the high resistance GaAs of 0.3mm as substrate, to reduce test noise, adopt fine process by preparation; Comprise signal wire 31 and parallel two ground wires 32 being located at its both sides, described signal wire 31 preferred characteristics impedances are the co-planar waveguide microstrip line of 50 Ω, and by ground wire 33, the ground of circuit board pros and cons is coupled together reliably, to reach good shield effectiveness, in the present embodiment, for guaranteeing that microwave junction is good with mating of signal line impedance, signal wire 31 is adopted repeatedly and smoothly widened, the live width 0.4mm at signal wire 31 two ends; For strengthening signal intensity and sensitivity, the interlude of signal wire 31 is made the type of falling S, and in the middle of signal wire 31, the width of the section of falling S is 0.25mm; Distance between signal wire 32 and ground wire 32 is 0.1mm.
Further, in the present embodiment, also further fix co-planar waveguide 3 by intermediate plate 22 and the Working-Clip seat 23 of being located at first stage face 1421 tops, horizontal block both sides.Wherein, the upper surface of described Working-Clip seat 23 is formed with one downwards for placing the heavy stand of intermediate plate 22, on the lateral surface of the relative and horizontal block of described Working-Clip seat 23, is also provided with a fixture block, and described fixture block is suitable with the longitudinal draw-in groove on vertical seat 212 medial surfaces.Thereby in the time of fixing co-planar waveguide 3, engage to compress compressing tablet 22 and co-planar waveguide 3 by Working-Clip seat 23 and Connection Block 21 mutual, co-planar waveguide 3 is anchored on base 14.Further, on test fixture described in the utility model, be also provided with shielding copper box (not shown), for shielding the high frequency sheet material part at co-planar waveguide 3 and place, reduce test noise.In addition in order to guarantee its electrical specification, anti-oxidation, reliably connects it, and described Connection Block 21 adopts copper material to make, and its electroplate; Described co-planar waveguide circuit board copper skin surface gold-plating.
Be only the utility model preferred embodiment in sum, be not used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modify, all should belong to technology category of the present utility model.
Claims (10)
1. the test fixture that ferromagnetic resonance parameter measurement is used, comprise shell, test splice and be fixed on the co-planar waveguide in shell, it is characterized in that: the end face of described shell has an instrument connection that sample is positioned, its two sides, left and right are respectively formed with a mounting hole for installation testing joint, and its leading flank has a pickup groove for fixing test probe; The inner wire of described test splice is connected through the mounting hole of shell and the contact of the inner wire of the co-planar waveguide in shell; Described co-planar waveguide comprises signal wire and parallel two ground wires being located at its both sides, the interlude of described signal wire is the type of falling S, and the width of the signal wire of the middle section of falling S is 0.25mm, the live width at signal wire two ends is 0.4mm, the distance of signal wire and ground wire is 0.1mm, and the two ends of described co-planar waveguide are also provided with realizes the plug that co-planar waveguide turns to the conversion of concentric cable.
2. test fixture according to claim 1, is characterized in that: described signal wire is that characteristic impedance is the co-planar waveguide microstrip line of 50 Ω.
3. test fixture according to claim 1, is characterized in that: the substrate of described co-planar waveguide is the high resistance GaAs substrate of thickness 0.3mm.
4. test fixture according to claim 3, is characterized in that: the substrate surface of described co-planar waveguide is coated with gold layer.
5. test fixture according to claim 1, is characterized in that: described test splice is sub-miniature A connector.
6. test fixture according to claim 1, it is characterized in that: described test splice is installed on the mounting hole place of shell by a connecting seat, described Connection Block is inverted L shape, comprise orthogonal horizontal base and vertical seat, the center of described vertical seat end face is provided with a conductor bores of passing for the inner wire of test splice, on the medial surface of described vertical seat, is also provided with a longitudinal draw-in groove.
7. test fixture according to claim 6, is characterized in that: described Connection Block is copper Connection Block, and its surface is silver coated.
8. test fixture according to claim 1, it is characterized in that: described shell comprises top board, header board, rear plate and base, described base by an orthogonal horizontal block and vertically T-shaped of forming of piece and be symmetrically set in horizontal block below, vertically a pair of ladder block of piece both sides combines, described co-planar waveguide is fixed on the end face of T-shaped, and the width of described T-shaped is less than the width of ladder block; Described forward and backward plate is arranged on the first cascaded surface of ladder block by securing member respectively, and described header board is corresponding to the vertical piece place of T-shaped, from bottom vertical be upwards provided with one with the suitable longitudinal opening of vertical piece size; The center of described top board is provided with an instrument connection that runs through top board upper and lower surface, and top board lower surface is each downward formation one projection also at two ends, left and right along its length, make each mounting hole for installation testing joint that forms on the side, two of left and right of the shell after connecting.
9. according to the test fixture described in claim 6 or 8, it is characterized in that: described test fixture also comprise be located at first stage face top, horizontal block both sides, for intermediate plate and the Working-Clip seat of fixing co-planar waveguide, the upper surface of described Working-Clip seat is formed with one downwards for placing the heavy stand of intermediate plate, described Working-Clip seat relatively with horizontal block lateral surface on be also provided with one with the suitable fixture block of longitudinal draw-in groove.
10. according to the test fixture described in claim 1-8 any one, it is characterized in that: described measured material is provided with the shielding copper box that reduces test noise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320816276.8U CN203658565U (en) | 2013-12-11 | 2013-12-11 | Test fixture for measurement of ferromagnetic resonance parameters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320816276.8U CN203658565U (en) | 2013-12-11 | 2013-12-11 | Test fixture for measurement of ferromagnetic resonance parameters |
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| CN203658565U true CN203658565U (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320816276.8U Expired - Fee Related CN203658565U (en) | 2013-12-11 | 2013-12-11 | Test fixture for measurement of ferromagnetic resonance parameters |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872916A (en) * | 2017-04-06 | 2017-06-20 | 苏州工业园区凯艺精密科技有限公司 | A kind of ferrite detection means |
| CN106950518A (en) * | 2017-03-07 | 2017-07-14 | 中电海康集团有限公司 | The test device and method of ferromagnetic resonance |
| CN107121569A (en) * | 2017-03-24 | 2017-09-01 | 南京航空航天大学 | Adjustable microwave circuit test fixture |
| WO2019019519A1 (en) * | 2017-07-24 | 2019-01-31 | 中电海康集团有限公司 | Ferromagnetic resonance probe |
-
2013
- 2013-12-11 CN CN201320816276.8U patent/CN203658565U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950518A (en) * | 2017-03-07 | 2017-07-14 | 中电海康集团有限公司 | The test device and method of ferromagnetic resonance |
| CN107121569A (en) * | 2017-03-24 | 2017-09-01 | 南京航空航天大学 | Adjustable microwave circuit test fixture |
| CN106872916A (en) * | 2017-04-06 | 2017-06-20 | 苏州工业园区凯艺精密科技有限公司 | A kind of ferrite detection means |
| CN106872916B (en) * | 2017-04-06 | 2023-12-05 | 苏州工业园区凯艺精密科技有限公司 | Ferrite detection device |
| WO2019019519A1 (en) * | 2017-07-24 | 2019-01-31 | 中电海康集团有限公司 | Ferromagnetic resonance probe |
| CN109298359A (en) * | 2017-07-24 | 2019-02-01 | 中电海康集团有限公司 | Ferromagnetic resonance probe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20191211 |