CN102680781A - Calibration device and metamaterial resonant frequency testing platform - Google Patents
Calibration device and metamaterial resonant frequency testing platform Download PDFInfo
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- CN102680781A CN102680781A CN2012101330118A CN201210133011A CN102680781A CN 102680781 A CN102680781 A CN 102680781A CN 2012101330118 A CN2012101330118 A CN 2012101330118A CN 201210133011 A CN201210133011 A CN 201210133011A CN 102680781 A CN102680781 A CN 102680781A
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Abstract
The invention provides a calibration device and a metamaterial resonant frequency testing platform. The metamaterial resonant frequency testing platform is calibrated by the calibration device and can be used for measuring the resonant frequency of a metamaterial accurately. The metamaterial resonant frequency testing platform achieves detection of parameters and properties of a metamaterial product, provides testing methods for metamaterial application and further improves the research and development design efficiency of the metamaterial.
Description
[technical field]
The present invention relates to ultra field of materials, relate to the measuring technology of ultra material resonances frequency particularly.
[background technology]
Ultra material is meant artificial composite structure or the compound substance that some have the not available extraordinary physical property of natural material.Structurally ordered design through on the key physical yardstick of material can break through the restriction of some apparent natural law, thereby obtains to exceed the meta-materials function of the intrinsic common character of nature.The character of ultra material and function mainly come from its inner structure but not constitute their material, therefore, are design and synthetic ultra material, and people have carried out a lot of research work.2000, people such as the Smith of University of California pointed out that the composite structure of metal wire and the open loop resonator (SRR) of periodic arrangement can realize that DIELECTRIC CONSTANTS and magnetic permeability μ simultaneously for negative two negative material, also claim LHM.They are again through going up the two negative material that making metal wire and SRR composite structure have been realized two dimension at printed circuit board (PCB) (PCB) afterwards.Have the metal wire and the open loop resonator structure of response for magnetic field, be referred to as magnetic micro-structure usually.
For ultra material with negative magnetoconductivity; Because it has polarization; Can produce the polarization influence to incident wave, therefore have widely and use, like the magnetic resonance imaging in the medical imaging field; Can strengthen evanescent wave to reach the purpose of strengthening imaging effect; For example in resonant wireless energy transfer, in resonant fields, add excess of imports material and can strengthen wireless energy transmission efficiency, but the condition that application need satisfies is: the resonance frequency needs of ultra material just can play beneficial effect under frequency of operation.Yet; For the ultra material of having made; The resonance frequency of itself is fixed on the one hand, and the reason of technology manufacturing makes the resonance frequency of ultra material demonstrate bigger otherness on the other hand, will bring difficulty to application like the resonance frequency that can't know ultra material exactly; The reinforced effects of ultra material will weaken greatly, does not even work.Therefore, the test to ultra material resonances frequency becomes the technical matters that needs to be resolved hurrily.
In the prior art, can realize simulation calculation through method of computer simulation, still to ultra material resonances frequency; The problem that exists is, for the ultra material with complex micro structure array, even adopt high-performance computer also to need long time to carry out simulation calculation; Simultaneously; Because the distinctiveness of manufacturing process, simulation result exists than mistake with actual ultra material resonances frequency, and this brings very big difficulty for the practical application of ultra material.
[summary of the invention]
Technical matters to be solved by this invention provides a kind of calibration device and ultra material resonances frequency test platform.
The present invention realizes that the technical scheme that goal of the invention adopts is, a kind of calibration device, said calibration device comprise package casing, coil inductance and the electric capacity parallelly connected with coil inductance, and said coil inductance and the encapsulation of said electric capacity are fixed in the said package casing.
Preferably, said package casing is a thermoset resin material.
The present invention also provides a kind of ultra material resonances frequency test platform, and in order to test the resonance frequency of ultra material, said resonance frequency test platform comprises:
Vector network analyzer, the ac signal of generation frequency adjustable;
The signal transmitting coil is electrically connected the signal output part of said vector network analyzer, in order to produce alternating magnetic field;
Signal receiving coil, in order to receive the alternating electromagnetism field signal that said signal transmitting coil produces, said signal receiving coil is electrically connected the signal input part of said vector network analyzer;
Calibration device, said calibration device are positioned between said signal transmitting coil and the said signal receiving coil.
Preferably, said signal transmitting coil is identical with the natural frequency of said signal receiving coil.
Preferably, said signal transmitting coil and said signal receiving coil are the annular enameled wire coil of single turn.
Preferably, the equal diameters of said signal transmitting coil and said signal receiving coil.
Preferably, the diameter of said signal transmitting coil and said signal receiving coil is less than the size of said ultra material.
Preferably, said signal transmitting coil and said signal receiving coil are separately fixed on the substrate, and said substrate is plastics or foamed material.
Through using according to calibration device of the present invention; Can calibrate ultra material resonances frequency test platform; Through ultra material resonances frequency test platform of the present invention, can record the resonance frequency of ultra material exactly, realize detection to ultra material product parameter character; Can also means of testing be provided for the application of ultra material, and then improve the research and development design efficiency of ultra material.
[description of drawings]
Fig. 1, the preparation structural representation of calibration device of the present invention.
Fig. 2, the structural representation of the ultra material resonances frequency test of the present invention platform.
Fig. 3, the method for testing process flow diagram of the ultra material resonances frequency test of the present invention platform
Fig. 4, the 2nd S21 curve that the vector network analyzer test obtains and the comparison diagram of a S21 curve.
[embodiment]
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
The preparation structural representation of calibration device of the present invention comprises package casing 41, coil inductance 42 and the electric capacity 43 parallelly connected with coil inductance referring to accompanying drawing 1, and coil inductance 42 is fixed in the package casing 41 with electric capacity 43 encapsulation.Package casing is a thermoset resin material; When concrete preparation; Adopt the prepreg of two thermoset resin materials, the mode through pressing is encapsulated in coil inductance 42 and electric capacity 43 between these two prepregs, obtains a flat calibration device after the curing.
The structural representation of the ultra material resonances frequency test of the present invention platform comprises following ingredient referring to accompanying drawing 2:
Vector network analyzer 1, the ac signal of generation frequency adjustable;
Signal transmitting coil 2, the signal output part of electrical connection vector network analyzer 1 is in order to produce alternating magnetic field;
Signal receiving coil 3, in order to receive the alternating electromagnetism field signal that signal transmitting coil 2 produces, signal receiving coil 3 is electrically connected the signal input part of vector network analyzer 1;
Should be understood that above-mentioned signal transmitting coil 2, signal receiving coil 3 and calibration device 4 need test clamp to fix when forming proving installation, this synoptic diagram is represented in detail.
The vector network analyzer 1 here can be accomplished the test to the transmission emission parameter of measured piece in the working frequency range of instrument; Vector network analyzer 1 obtains complete parameter to certain device or system testing and comprises: emission and transmissison characteristic, amplitude information, phase information etc.; Can adopt S parameter (or claiming scattering parameter) to describe to these parameters; The definition of S parameter is based on the parameter of signal voltage ratio; So the S parameter is a vector, for vector network analyzer 1, the signal transmitting coil 2 in the ultra material resonances frequency test of the present invention platform is the input port of system under test (SUT); Signal receiving coil 3 is the output port of system under test (SUT); The reflection coefficient of system under test (SUT) input port is expressed as S11, and the transmission coefficient of system under test (SUT) input port to output port is expressed as S21, and S11 or the S21 curve map in the working frequency range can tested and obtain to vector network analyzer 1.
Signal transmitting coil 2 of the present invention and signal receiving coil 3 can adopt the annular enameled wire coil of single turn; Be the comparative that obtains; The diameter that signal transmitting coil 2 and signal receiving coil 3 are designed to equate is to obtain identical natural frequency; Simultaneously, the diameter of signal transmitting coil 2 and signal receiving coil 3 is less than the size of ultra material.
For making things convenient for each parts of fixing test device, signal transmitting coil 2 is separately fixed on the substrate with signal receiving coil 3, and substrate adopts the magnetic loss materials with smaller, like plastics or foamed material.
Test philosophy and method of testing in the face of the ultra material resonances frequency test of the present invention platform is elaborated down.
The method of testing of the ultra material resonances frequency test of the present invention platform describes.
At first calibration device 4 is put into ultra material resonances frequency test platform, the coil inductance 42 of establishing in the calibration device 4 is L, and electric capacity 43 is C, constitutes EMR electromagnetic resonance together, and the resonance frequency of the calibration device after the encapsulation is so:
Through selecting and definite coil inductance L and selection corresponding capacitance C; Can calculate the resonance frequency of calibration device; Vector network analyzer 1 through ultra material resonances frequency test platform carries out frequency sweep then; Obtain the S21 curve of calibration device, if the resonance frequency of the calibration device that the pairing frequency in S21 curve reinforcement peak equals to calculate, then the test result of the ultra material resonances frequency test platform of proof is correctly reliable; If the S21 curve is strengthened the resonance frequency that the pairing frequency in peak is not equal to the calibration device that calculates, then there is error in the test result of the ultra material resonances frequency test platform of proof, thereby realizes the calibration of the ultra material properties test platform of magnetic.
After ultra material resonances frequency test platform is calibrated, the test that can surpass the material resonances frequency, its method of testing process flow diagram comprises referring to accompanying drawing 3:
A. when not putting into ultra material,, obtain a S21 curve through the transmission coefficient S21 between vector network analyzer test signal transmitting coil and the signal receiving coil;
B. put into ultra material,, obtain the 2nd S21 curve through the transmission coefficient S21 ' between vector network analyzer test signal transmitting coil and the signal receiving coil;
C. the 2nd a S21 curve and a said S21 curve are compared, find out the gain of the 2nd S21 curve and strengthen the peak, the resonance frequency that the corresponding frequency of peak-to-peak value is ultra material is strengthened in gain.
Here; At first ultra material is carried out necessary explanation, ultra material belongs to a kind of compound substance of synthetic, generally comprises medium substrate and the array a plurality of artificial microstructure on medium substrate; Medium substrate is a dielectric material; Artificial microstructure is a conductive material, for example, and through being magnetic micro-structure with artificial microstructure design; It is the derived structure that each artificial microstructure (being commonly referred to as cell) is split ring structure or split ring; Can make ultra material have the characteristic of negative magnetoconductivity, because the derived structure of such split ring structure or split ring can equivalence be the LC resonant circuit, so can realize enhancing to magnetic field through the array of a plurality of magnetic micro-structures in some frequency.Manufacturing for ultra material; Prior art generally adopts the PCB processing technology; On epoxy resin base plate, print out the array that the identical metallic copper magnetic micro-structure of a plurality of structures is formed; To form ultra material, through can change the resonance frequency of ultra material, the ultra material that obtains having different resonance frequencies to the cell size of metallic copper microstructure, the structural design of microstructure itself etc.
For produced ultra material; Its resonance frequency receives the influence of various factors; Like manufacturing accuracy, medium substrate material behavior and the medium substrate material homogeneity etc. of manufacturing process, microstructure, therefore test for the application of ultra material technology quite crucial to the actual resonance frequency of ultra material.
Test philosophy of the present invention is: when not putting into ultra material in the proving installation; Carry out the transmission of electromagnetic wave signal through air between signal transmitting coil and the signal receiving coil, can test a S21 curve that obtains in working frequency range through vector network analyzer;
After putting into ultra material in the proving installation,, obtain the 2nd S21 curve through the transmission coefficient S21 ' between vector network analyzer test signal transmitting coil and the signal receiving coil; Ultra material can add the transmission of high-intensity magnetic field disappearance ripple, improves the transfer efficiency of system, and when the resonance frequency of ultra material equates with the signal frequency of signal transmitting coil emission; It is the highest that transfer efficiency reaches, and therefore through the 2nd a S21 curve and a said S21 curve are compared, finds out the gain of the 2nd S21 curve and strengthen the peak; The resonance frequency that the corresponding frequency of peak-to-peak value is ultra material is strengthened in gain, and accompanying drawing 3 is for testing the 2nd S21 curve that obtains and the comparison diagram of a S21 curve, among the figure through vector network analyzer; Label 1 corresponding curve is the 2nd S21 curve; Do not have the curve of mark to be a S21 curve, the 2nd S21 curve has one with respect to a S21 curve and significantly strengthens the peak, and the coordinate of strengthening peak-to-peak value point is: (52MHz;-53.61dB), promptly ultra material resonances frequency is 52MHz.
For the convenience of test with fast; Before step a, also carry out following steps: the resonant frequency range that obtains ultra material through method of computer simulation; As adopt CST software to carry out the simulation calculation of resonance frequency; Obtain the approximate range of ultra material resonances frequency, in above-mentioned steps a, b, the signal scanning scope of control vector network analyzer is carried out in this resonant frequency range then.
In the above-described embodiments, only the present invention has been carried out exemplary description, but those skilled in the art can carry out various modifications to the present invention after reading present patent application under the situation that does not break away from the spirit and scope of the present invention.
Claims (8)
1. a calibration device is characterized in that, said calibration device comprises package casing, coil inductance and the electric capacity parallelly connected with coil inductance, and said coil inductance and the encapsulation of said electric capacity are fixed in the said package casing.
2. calibration device according to claim 1 is characterized in that: said package casing is a thermoset resin material.
3. ultra material resonances frequency test platform, is characterized in that said resonance frequency test platform comprises in order to test the resonance frequency of ultra material:
Vector network analyzer, the ac signal of generation frequency adjustable;
The signal transmitting coil is electrically connected the signal output part of said vector network analyzer, in order to produce alternating magnetic field;
Signal receiving coil, in order to receive the alternating electromagnetism field signal that said signal transmitting coil produces, said signal receiving coil is electrically connected the signal input part of said vector network analyzer;
Calibration device, said calibration device are positioned between said signal transmitting coil and the said signal receiving coil.
4. ultra material resonances frequency test platform according to claim 3, it is characterized in that: said signal transmitting coil is identical with the natural frequency of said signal receiving coil.
5. ultra material resonances frequency test platform according to claim 3 is characterized in that: said signal transmitting coil and said signal receiving coil are the annular enameled wire coil of single turn.
6. ultra material resonances frequency test platform according to claim 5 is characterized in that: the equal diameters of said signal transmitting coil and said signal receiving coil.
7. ultra material resonances frequency test platform according to claim 6, it is characterized in that: the diameter of said signal transmitting coil and said signal receiving coil is less than the size of said ultra material.
8. ultra material resonances frequency test platform according to claim 3, it is characterized in that: said signal transmitting coil and said signal receiving coil are separately fixed on the substrate, and said substrate is plastics or foamed material.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103176056A (en) * | 2013-03-04 | 2013-06-26 | 大连海事大学 | Chip capacitor testing device and chip capacitor testing method based on vector network analyzer |
| CN103792435A (en) * | 2013-12-30 | 2014-05-14 | 京信通信技术(广州)有限公司 | Coupling component, and data measuring device and method for measuring scattering parameters |
| CN106645971A (en) * | 2017-01-24 | 2017-05-10 | 佛山市瑞福物联科技有限公司 | Method for testing belt packaging impedance of ultrahigh frequency RFID chip through resonance method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103176056A (en) * | 2013-03-04 | 2013-06-26 | 大连海事大学 | Chip capacitor testing device and chip capacitor testing method based on vector network analyzer |
| CN103176056B (en) * | 2013-03-04 | 2015-05-13 | 大连海事大学 | Chip capacitor testing device and chip capacitor testing method based on vector network analyzer |
| CN103792435A (en) * | 2013-12-30 | 2014-05-14 | 京信通信技术(广州)有限公司 | Coupling component, and data measuring device and method for measuring scattering parameters |
| CN103792435B (en) * | 2013-12-30 | 2017-02-15 | 京信通信技术(广州)有限公司 | Coupling component, and data measuring device and method for measuring scattering parameters |
| CN106645971A (en) * | 2017-01-24 | 2017-05-10 | 佛山市瑞福物联科技有限公司 | Method for testing belt packaging impedance of ultrahigh frequency RFID chip through resonance method |
| CN106645971B (en) * | 2017-01-24 | 2023-05-09 | 佛山市瑞福物联科技有限公司 | Method for testing package impedance of ultrahigh frequency RFID chip by using resonance method |
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| CN102680781B (en) | 2015-05-27 |
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Effective date of registration: 20210514 Address after: 2 / F, software building, No.9, Gaoxin Zhongyi Road, Nanshan District, Shenzhen City, Guangdong Province Patentee after: KUANG-CHI INSTITUTE OF ADVANCED TECHNOLOGY Address before: 18B, building a, CIC international business center, 1061 Xiangmei Road, Futian District, Shenzhen, Guangdong 518034 Patentee before: KUANG-CHI INNOVATIVE TECHNOLOGY Ltd. |
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