CN202661552U - Dielectric materials complex permittivity testing device based on quasi-optics resonant cavity - Google Patents

Dielectric materials complex permittivity testing device based on quasi-optics resonant cavity Download PDF

Info

Publication number
CN202661552U
CN202661552U CN 201220259874 CN201220259874U CN202661552U CN 202661552 U CN202661552 U CN 202661552U CN 201220259874 CN201220259874 CN 201220259874 CN 201220259874 U CN201220259874 U CN 201220259874U CN 202661552 U CN202661552 U CN 202661552U
Authority
CN
China
Prior art keywords
coupling
quasi
cavity
coaxial cable
concave
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN 201220259874
Other languages
Chinese (zh)
Inventor
李恩
郭高凤
何凤梅
陈聪慧
戈弋
高源慈
聂瑞星
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of Electronic Science and Technology of China
Original Assignee
University of Electronic Science and Technology of China
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by University of Electronic Science and Technology of China filed Critical University of Electronic Science and Technology of China
Priority to CN 201220259874 priority Critical patent/CN202661552U/en
Application granted granted Critical
Publication of CN202661552U publication Critical patent/CN202661552U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Landscapes

  • Measurement Of Resistance Or Impedance (AREA)

Abstract

The utility model provides a dielectric materials complex permittivity testing device based on a quasi-optics resonant cavity, and belongs to the technical field of dielectric materials testing. The dielectric materials complex permittivity testing device based on the quasi-optics resonant cavity comprises the quasi-optics resonant cavity, coaxial line coupling rings and a vector network analyzer. The quasi-optics resonant cavity is a symmetrical biconcave cavity or a level concave cavity. The coaxial line coupling rings are ring-shaped metallic conductors used for connecting a coaxial line inner conductor and a coaxial line outer conductor. Testing signals are entered into the resonant cavity through a coaxial line, a coupling input hole and a first coaxial line coupling ring, output signals produced by the resonant cavity is output through a second coaxial line coupling ring, the signals are penetrated through the coupling output hole and transmitted back to the vector network analyzer through the other segment of the coaxial line. On the basis of a direct coupling hole of the quasi-optics resonant cavity, the coaxial line coupling rings are added to the testing device. The amount of signal coupling input energy and signal coupling output energy can be adjusted by adjusting the size of the coaxial line coupling rings, so that the adjustability of coupling energy is achieved. Moreover, the dielectric materials complex permittivity testing device based on the quasi-optics resonant cavity has the advantages of being simple in structure and convenient to use.

Description

A kind of dielectric material complex dielectric constant test device based on quasi-optical resonator
Technical field
The utility model belongs to the dielectric material technical field of measurement and test, relates to microwave, millimeter wave frequency band dielectric material complex permittivity test quasi-optical resonator.
Background technology
The method for measuring complex dielectric constant of dielectric material mainly is divided into two large classes by test philosophy: network parameter method and resonance method.The network parameter method generally is applicable in the complex-permittivity measurement of dielectric substance of middle high loss, and the resonance rule is applicable to the low complex-permittivity measurement that decreases the dielectric consumption material.
Resonance method is divided into again perturbation method, high-q cavity method, transmission resonator method, dielectric resonator method and quasi-optical resonator method etc.Wherein, the quasi-optical resonator method is usually used in the dielectric substance complex permittivity test of millimeter wave frequency band.
Quasi-optical resonator is called for short quasi optical cavity.Quasi optical cavity structure commonly used has two kinds: a kind of is the symmetric double curved cavity, is formed over against placement by two concave mirrors; A kind of is the flat-concave cavity structure, is formed over against placement by a level crossing and a concave mirror.
In millimere-wave band, quasi optical cavity coupling scheme relatively more commonly used are aperture couplings.This kind coupling scheme can effectively encourage the electromagnetic field in the quasi optical cavity, have characteristics simple in structure, easy to process; But shortcoming is that the position of coupling aperture is in case determine that the size of electromagnetic wave coupling energy is also decided with regard to corresponding, does not have adjustability.
Document " Gaussian-Beam Open Resonator with Highly Reflective Circular Coupling Regions; IEEE Transactions on Microwave Theory and Techniques; 1993; vol.41; No.10; p1710 ~ 1714. " has proposed a kind of mode that adopts the wire netting film to carry out the electromagnetic wave energy coupling, but this kind Energy Coupling mode is relatively harsher to the spacing requirement on bonding jumper hurdle, needs very high processing technology.
Document " The Influence of a Coupling Film on Ultra-Low-Loss Dielectric Measurement Using an Open Resonator; Journal Millimeter Terahertz Waves; 2011; vol.32; p935-942. " and document " Measurement of Dielectric Properties for Low-Loss Materials at Millimeter Wavelengths; Journal Millimeter Terahertz Waves, 2012, vol.32, p838 ~ 847. " adopt between spherical mirror oblique cutting to enter a coupling iris to carry out Energy Coupling, the insertion angle of diaphragm needs be 45° angle with the optical axis of quasi optical cavity.System utilizes antenna that emitting electromagnetic wave is aimed at optical cavity and encourages.These coupling scheme are suitable for the Terahertz frequency range, and it is too complicated to use the millimere-wave band system to consist of.
Summary of the invention
The utility model provides a kind of dielectric material complex dielectric constant test device based on quasi-optical resonator, have characteristics simple in structure, easy to make and that coupling energy is adjustable, be applicable to the test of microwave, millimeter wave wide-band scope dielectric substance complex permittivity.
The technical solution of the utility model is as follows:
A kind of dielectric material complex dielectric constant test device based on quasi-optical resonator as shown in Figure 1, 2, comprises quasi-optical resonator 1, coaxial cable coupling annulus 2 and vector network analyzer 3.Described quasi-optical resonator 1 is for the symmetric double cavity that formed over against placement by two concave mirrors or by a level crossing and the flat-concave cavity that concave mirror forms over against placement.Described coaxial cable coupling annulus (2) is for connecting the circular metallic conductor of coaxial inner conductor and outer conductor.For quasi-optical resonator 1 for for the dielectric material complex dielectric constant test device of symmetric double cavity, the test signal that vector network analyzer 3 produces is passed coupling aperture (input hole namely is coupled) 111 that is positioned at the first concave mirror 11 centers in the symmetric double cavity and is coupled into the symmetric double cavity by the first coaxial cable coupling annulus 21 by one section coaxial cable transmission; The output signal that the symmetric double cavity produces is passed the coupling aperture 121 that is positioned at the second concave mirror 12 centers in the symmetric double cavity and is transmitted back to vector network analyzer 3 by another section coaxial cable through the 22 coupling outputs of the second coaxial cable coupling annulus.For quasi-optical resonator 1 for for the dielectric material complex dielectric constant test device of flat-concave cavity, the test signal that vector network analyzer 3 produces is by one section coaxial cable transmission, passes near the input coupling aperture 111 that is positioned in the flat-concave cavity concave mirror 11 centers and is coupled into flat-concave cavity by the first coaxial cable coupling annulus 21; The output signal that flat-concave cavity produces is through the 22 coupling outputs of the second coaxial cable coupling annulus, passes near the output coupling aperture 121 that is positioned in the flat-concave cavity concave mirror 11 centers and is transmitted back to vector network analyzer 3 by another section coaxial cable.
The dielectric material complex dielectric constant test device based on quasi-optical resonator that the utility model provides, the specific works process is: the test signal that vector network analyzer 3 produces is transmitted by coaxial cable, pass the coupling input hole of quasi-optical resonator, be coupled into quasi-optical resonator through the first coaxial cable coupling annulus 21; The measured medium sample places quasi-optical resonator, and (for the symmetric double cavity, the measured medium sample places the center in concave-concave chamber; For flat-concave cavity, the measured medium sample places the center of level crossing) test position; The output signal that quasi-optical resonator produces is passed the coupling delivery outlet of quasi-optical resonator through the 22 coupling outputs of the second coaxial cable coupling annulus, passes vector network analyzer 3 back finally by another section coaxial cable.Utilize vector network analyzer 3 and corresponding testing software that the measured medium sample is tested.
Can realize the adjusting of signal coupling input energy and coupling output energy size by the size of regulating described the first coaxial cable coupling annulus 21 and the second coaxial cable coupling annulus 22.
Described concave mirror or level crossing are that metal material is made or substrate of glass adds the surface metalation making.
The dielectric material complex dielectric constant test device based on quasi-optical resonator that the utility model provides, the signal coupling mode is improved, on the basis, direct-coupling hole of adopting quasi-optical resonator, increased the circular metallic conductor that connects coaxial inner conductor and outer conductor-coaxial cable coupling annulus, because the size of coaxial cable coupling annulus can be regulated arbitrarily, so just can realize by the size of regulating coaxial cable coupling annulus the adjusting of signal coupling input energy and coupling output energy size, thereby realize the adjustability of coupling energy.Simultaneously, the dielectric material complex dielectric constant test device based on quasi-optical resonator that the utility model provides does not adopt the Energy Coupling mode of wire netting film or coupling iris, so that the utlity model has characteristics simple in structure, operating aspect.
Description of drawings
Fig. 1 is the dielectric material complex dielectric constant test device structural representation based on the symmetric double cavity that the utility model provides.
Fig. 2 is the dielectric material complex dielectric constant test device structural representation based on flat-concave cavity that the utility model provides.
Fig. 3 is symmetric double curved cavity synoptic diagram.
Fig. 4 is the flat-concave cavity structural representation.
Fig. 5 is concave surface mirror intention in the symmetric double cavity.
Fig. 6 is concave surface mirror intention in the flat-concave cavity.
Among Fig. 1 to Fig. 6: the 1st, the accurate resonator cavity of learning, the 2nd, coaxial cable coupling annulus, the 3rd, vector network analyzer; The 11st, concave mirror in the first concave mirror or the flat-concave cavity in the symmetric double cavity, the 12nd, the second concave mirror or flat-concave cavity midplane mirror in the symmetric double cavity, 21 is the first coaxial cable coupling annulus, 22 is the second coaxial cable coupling annulus, the 111st, near the input Energy Coupling hole the concave mirror center in the input Energy Coupling hole at the first concave mirror center or the flat-concave cavity in the symmetric double cavity, near the output Energy Coupling hole the concave mirror center in the output Energy Coupling hole at the second concave mirror center or the flat-concave cavity in the 121 symmetric double cavitys.
Embodiment
A kind of dielectric material complex dielectric constant test device based on quasi-optical resonator as shown in Figure 1, 2, comprises quasi-optical resonator 1, coaxial cable coupling annulus 2 and vector network analyzer 3.Described quasi-optical resonator 1 is for the symmetric double cavity that formed over against placement by two concave mirrors or by a level crossing and the flat-concave cavity that concave mirror forms over against placement.Described coaxial cable coupling annulus (2) is for connecting the circular metallic conductor of coaxial inner conductor and outer conductor.For quasi-optical resonator 1 for for the dielectric material complex dielectric constant test device of symmetric double cavity, the test signal that vector network analyzer 3 produces is passed coupling aperture (input hole namely is coupled) 111 that is positioned at the first concave mirror 11 centers in the symmetric double cavity and is coupled into the symmetric double cavity by the first coaxial cable coupling annulus 21 by one section coaxial cable transmission; The output signal that the symmetric double cavity produces is passed the coupling aperture 121 that is positioned at the second concave mirror 12 centers in the symmetric double cavity and is transmitted back to vector network analyzer 3 by another section coaxial cable through the 22 coupling outputs of the second coaxial cable coupling annulus.For quasi-optical resonator 1 for for the dielectric material complex dielectric constant test device of flat-concave cavity, the test signal that vector network analyzer 3 produces is by one section coaxial cable transmission, passes near the input coupling aperture 111 that is positioned in the flat-concave cavity concave mirror 11 centers and is coupled into flat-concave cavity by the first coaxial cable coupling annulus 21; The output signal that flat-concave cavity produces is through the 22 coupling outputs of the second coaxial cable coupling annulus, passes near the output coupling aperture 121 that is positioned in the flat-concave cavity concave mirror 11 centers and is transmitted back to vector network analyzer 3 by another section coaxial cable.
Can realize the adjusting of signal coupling input energy and coupling output energy size by the size of regulating described the first coaxial cable coupling annulus 21 and the second coaxial cable coupling annulus 22.
Described concave mirror or level crossing are that metal material is made or substrate of glass adds the surface metalation making.
The dielectric material complex dielectric constant test device based on quasi-optical resonator that the utility model provides, the specific works process is: the test signal that vector network analyzer 3 produces is transmitted by coaxial cable, pass the coupling input hole of quasi-optical resonator, be coupled into quasi-optical resonator through the first coaxial cable coupling annulus 21; The measured medium sample places quasi-optical resonator, and (for the symmetric double cavity, the measured medium sample places the center in concave-concave chamber; For flat-concave cavity, the measured medium sample places the center of level crossing) center position; The output signal that quasi-optical resonator produces is passed the coupling delivery outlet of quasi-optical resonator through the 22 coupling outputs of the second coaxial cable coupling annulus, passes vector network analyzer 3 back finally by another section coaxial cable.Utilize vector network analyzer 3 and corresponding testing software that the measured medium sample is tested.
It is as follows that utilization is carried out dielectric material complex-permittivity measurement process based on the dielectric material complex dielectric constant test device of quasi-optical resonator:
Resonance frequency f when at first utilizing network analyzer 3 to measure quasi-optical resonator 1 zero load 0And quality factor q 0Then (for the symmetric double cavity, the measured medium sample places the center in concave-concave chamber the measured medium sample to be placed the load situation of quasi-optical resonator 1; For flat-concave cavity, the measured medium sample places the center of level crossing), utilize the resonance frequency f after network analyzer 3 is measured quasi-optical resonator 1 loading measured medium sample 0sAnd quality factor q sAccording to the resonance frequency before and after the cavity load sample and the variation of Q-unloaded, can calculate relative dielectric constant and the loss tangent of dielectric material again.Its computing formula is as follows:
According to quasi-optical resonator basic mode resonant frequency equation:
f 00 q = c 2 D [ q + 1 + 1 π arctan D / ( R 0 - D ) ] - - - ( 1 )
In the formula, c is the light velocity, and D is the chamber of quasi-optical resonator long (distance of upper end from the coupling aperture lower end to level crossing), R 0Be the radius-of-curvature of spherical mirror, q is the longitudinal modulus of quasi-optical resonator.
Cavity resonance frequency f by precedence record 0With the long D in chamber (measuring), get final product the mode of resonance that inverse goes out basic mode.After mode of resonance is determined, according to the cavity resonance frequency f 0With the q value, can go out the more accurate long D in chamber by inverse.
The computing formula of the relative dielectric constant of sample is:
1 n tan ( nkt - φ t ) = - tan ( kd - φ d ) φ t = arctan ( t / ns 0 ) φ d = arctan ( d ′ ′ / s 0 ) - arctan ( t / ns 0 ) w 0 2 = 2 k ( d + t / n 2 ) ( R 0 - d - t / n ) s 0 = d ′ ′ ( R 0 - d ′ ′ ) d = D - t d ′ ′ = d + t / n n = ϵ r - - - ( 2 )
Wherein: c is the light velocity, and D is that the chamber of quasi-optical resonator is long, R 0Be the radius-of-curvature of spherical mirror, t is the thickness of dielectric sample.
Resonance frequency f by previous measurement loaded cavity 0s, sample thickness t and according to the cavity resonance frequency f 0The long D in quasi-optical resonator chamber that inverse goes out can separate transcendental equation, thereby obtains the relative dielectric constant of sample.
The calculating of loss tangent:
tan δ = 1 Q e · tΔ + d tΔ + 1 2 k sin 2 ( kd - φ d ) 1 Q e = 1 Q 0 s - 1 Q 1 Q 1 = Q 00 · 2 ( tΔ + d ) D ( Δ + 1 ) Δ = n 2 n 2 cos 2 ( nkt - φ t ) + sin 2 ( nkt - φ t ) - - - ( 3 )
Q in formula sThe quality factor of loaded cavity, Q 1The quality factor of putting into perfect medium sample (lossless), Q 0The quality factor of cavity.
Step by the front is calculated relative dielectric constant, and the loaded cavity quality factor q that had before recorded sWith the cavity quality factor q 0Can calculate the loss tangent of sample.

Claims (3)

1. the dielectric material complex dielectric constant test device based on quasi-optical resonator comprises quasi-optical resonator (1), coaxial cable coupling annulus (2) and vector network analyzer (3); Described quasi-optical resonator (1) is for the symmetric double cavity that formed over against placement by two concave mirrors or by a level crossing and the flat-concave cavity that concave mirror forms over against placement; Described coaxial cable coupling annulus (2) is for connecting the circular metallic conductor of coaxial inner conductor and outer conductor; It is characterized in that:
For quasi-optical resonator (1) for for the dielectric material complex dielectric constant test device of symmetric double cavity, the test signal that vector network analyzer (3) produces is passed the input Energy Coupling hole (111) that is positioned at the first concave mirror (11) center in the symmetric double cavity and is coupled into the symmetric double cavity by the first coaxial cable coupling annulus (21) by one section coaxial cable transmission; The output signal that the symmetric double cavity produces is passed the output Energy Coupling hole (121) that is positioned at the second concave mirror (12) center in the symmetric double cavity and is transmitted back to vector network analyzer (3) by another section coaxial cable through the second coaxial cable coupling annulus (22) coupling output; For quasi-optical resonator (1) for for the dielectric material complex dielectric constant test device of flat-concave cavity, the test signal that vector network analyzer (3) produces is by one section coaxial cable transmission, passes near the input Energy Coupling hole (111) that is positioned in the flat-concave cavity concave mirror (11) center and is coupled into flat-concave cavity by the first coaxial cable coupling annulus (21); The output signal that flat-concave cavity produces is through the second coaxial cable coupling annulus (22) coupling output, passes near the output Energy Coupling hole (121) that is positioned in the flat-concave cavity concave mirror (11) center and is transmitted back to vector network analyzer (3) by another section coaxial cable.
2. the dielectric material complex dielectric constant test device based on quasi-optical resonator according to claim 1, it is characterized in that, can realize the adjusting of signal coupling input energy and coupling output energy size by the size of regulating described the first coaxial cable coupling annulus (21) and described the second coaxial cable coupling annulus (22).
3. the dielectric material complex dielectric constant test device based on quasi-optical resonator according to claim 1 and 2 is characterized in that, described concave mirror or level crossing are that metal material is made or substrate of glass adds the surface metalation making.
CN 201220259874 2012-06-04 2012-06-04 Dielectric materials complex permittivity testing device based on quasi-optics resonant cavity Expired - Lifetime CN202661552U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220259874 CN202661552U (en) 2012-06-04 2012-06-04 Dielectric materials complex permittivity testing device based on quasi-optics resonant cavity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220259874 CN202661552U (en) 2012-06-04 2012-06-04 Dielectric materials complex permittivity testing device based on quasi-optics resonant cavity

Publications (1)

Publication Number Publication Date
CN202661552U true CN202661552U (en) 2013-01-09

Family

ID=47456450

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220259874 Expired - Lifetime CN202661552U (en) 2012-06-04 2012-06-04 Dielectric materials complex permittivity testing device based on quasi-optics resonant cavity

Country Status (1)

Country Link
CN (1) CN202661552U (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102707155A (en) * 2012-06-04 2012-10-03 电子科技大学 Test device for complex dielectric constant of dielectric material based on quasi-optical resonant cavity
CN103675465A (en) * 2013-12-09 2014-03-26 浙江大学 Complex dielectric constant measuring device and method based on wireless energy transmission principle
CN104244554A (en) * 2013-06-21 2014-12-24 电子科技大学 Novel method for rapidly diagnosing plasma in real time through quasi-optical resonant cavity
CN104407232A (en) * 2014-11-26 2015-03-11 电子科技大学 System and method for testing microwave complex permittivity of dielectric material
CN111198302A (en) * 2020-02-13 2020-05-26 山东国瓷功能材料股份有限公司 Method, device and system for testing dielectric property of material
CN111239498A (en) * 2020-03-18 2020-06-05 山东国瓷功能材料股份有限公司 Device and method for testing dielectric property of material
CN111487470A (en) * 2020-03-18 2020-08-04 山东国瓷功能材料股份有限公司 Device and method for testing dielectric property of material
CN111697303A (en) * 2020-06-05 2020-09-22 山东国瓷功能材料股份有限公司 Adjusting method and adjusting device for coupling waveguide ring of resonant cavity and resonant cavity
CN112798873A (en) * 2020-12-30 2021-05-14 中国原子能科学研究院 End coupling cavity measuring device and end coupling cavity measuring method for coupling cavity accelerating structure
CN113252992A (en) * 2021-07-05 2021-08-13 山东国瓷功能材料股份有限公司 Material dielectric property test equipment

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102707155B (en) * 2012-06-04 2014-07-16 电子科技大学 Test device for complex dielectric constant of dielectric material based on quasi-optical resonant cavity
CN102707155A (en) * 2012-06-04 2012-10-03 电子科技大学 Test device for complex dielectric constant of dielectric material based on quasi-optical resonant cavity
CN104244554A (en) * 2013-06-21 2014-12-24 电子科技大学 Novel method for rapidly diagnosing plasma in real time through quasi-optical resonant cavity
CN103675465B (en) * 2013-12-09 2015-11-18 浙江大学 Based on the method for measuring complex dielectric constant of wireless energy transfer principle
CN103675465A (en) * 2013-12-09 2014-03-26 浙江大学 Complex dielectric constant measuring device and method based on wireless energy transmission principle
CN104407232B (en) * 2014-11-26 2017-06-30 电子科技大学 Dielectric substance microwave complex dielectric constant test system and method
CN104407232A (en) * 2014-11-26 2015-03-11 电子科技大学 System and method for testing microwave complex permittivity of dielectric material
CN111198302A (en) * 2020-02-13 2020-05-26 山东国瓷功能材料股份有限公司 Method, device and system for testing dielectric property of material
CN111239498A (en) * 2020-03-18 2020-06-05 山东国瓷功能材料股份有限公司 Device and method for testing dielectric property of material
CN111487470A (en) * 2020-03-18 2020-08-04 山东国瓷功能材料股份有限公司 Device and method for testing dielectric property of material
CN111239498B (en) * 2020-03-18 2022-05-31 山东国瓷功能材料股份有限公司 Device and method for testing dielectric property of material
CN111697303A (en) * 2020-06-05 2020-09-22 山东国瓷功能材料股份有限公司 Adjusting method and adjusting device for coupling waveguide ring of resonant cavity and resonant cavity
CN112798873A (en) * 2020-12-30 2021-05-14 中国原子能科学研究院 End coupling cavity measuring device and end coupling cavity measuring method for coupling cavity accelerating structure
CN113252992A (en) * 2021-07-05 2021-08-13 山东国瓷功能材料股份有限公司 Material dielectric property test equipment
CN113252992B (en) * 2021-07-05 2021-11-05 山东国瓷功能材料股份有限公司 Material dielectric property test equipment

Similar Documents

Publication Publication Date Title
CN102707155B (en) Test device for complex dielectric constant of dielectric material based on quasi-optical resonant cavity
CN202661552U (en) Dielectric materials complex permittivity testing device based on quasi-optics resonant cavity
JP4180069B2 (en) Bloodless blood glucose measuring device and method using millimeter wave
Esfandiyari et al. Tunable terahertz filter/antenna-sensor using graphene-based metamaterials
CN109473757B (en) Broadband transmission line chip
US7868627B2 (en) Method and a device for measuring dielectric characteristics of material bodies
CN104111378A (en) Microwave material electromagnetic parameter and shielding performance slab line test method
CN203479701U (en) Optical fiber sensor and measurement system
CN111551521B (en) Metamaterial sensor based on terahertz wave band and application method thereof
CN103149449B (en) Based on single port coaxial line type complex dielectric constant measuring apparatus and the method for mould coupling
CN105846070A (en) Probe antenna for terahertz waveband near-field imaging
CN107462774B (en) A kind of dielectric property test device and measurement method
Wang et al. A dual-band non-destructive dielectric measurement sensor based on complementary split-ring resonator
CN109061319A (en) A kind of measuring electromagnetic parameters method based on rectangular cavity
Bakır et al. Multifunctional metamaterial sensor applications based on chiral nihility
US10107771B2 (en) Sensor for dielectric spectroscopy of a sample
CN104244554A (en) Novel method for rapidly diagnosing plasma in real time through quasi-optical resonant cavity
CN111795979A (en) Test method for measuring complex dielectric constant and complex permeability of film sample
CN102798764B (en) Method for measuring medium loss by using phase change of electromagnetic evanescent wave
CN113238320B (en) Method for measuring insertion loss of device based on micro-ring resonator
Wang et al. Flexible strain sensor based on a frequency selective surface
CN110289942B (en) Navigation clock synchronization device and method based on microwave and optical entanglement
US20210285985A1 (en) Silicon probe for millimeter-wave and terahertz measurement and characterization
Wang et al. Reconfigurable multimode microwave sensor with resonance and transmission sensing capabilities for noninvasive glucose monitoring
CN113218908A (en) Plant leaf water content detection method based on terahertz back scattering signal

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20130109

Effective date of abandoning: 20140716

AV01 Patent right actively abandoned

Granted publication date: 20130109

Effective date of abandoning: 20140716

RGAV Abandon patent right to avoid regrant