CN112557339A - Double-frequency terahertz near-field imaging system and method - Google Patents
Double-frequency terahertz near-field imaging system and method Download PDFInfo
- Publication number
- CN112557339A CN112557339A CN201910910854.6A CN201910910854A CN112557339A CN 112557339 A CN112557339 A CN 112557339A CN 201910910854 A CN201910910854 A CN 201910910854A CN 112557339 A CN112557339 A CN 112557339A
- Authority
- CN
- China
- Prior art keywords
- terahertz
- signal
- circuit module
- frequency
- dual
- 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.)
- Pending
Links
- 238000003384 imaging method Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 16
- 239000003792 electrolyte Substances 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000005034 decoration Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001808 coupling effect Effects 0.000 description 1
- 238000006880 cross-coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3581—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation
- G01N21/3586—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Toxicology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a double-frequency terahertz near field imaging system and a method, comprising the following steps: terahertz dual-frequency oscillator circuit module: the terahertz voltage signal is used for generating two frequencies which are stably output; the signal source is used for the double-frequency terahertz near-field imaging system and transmits the signal to the split ring resonator through the transmission line; split ring resonator: for sensing a property of a substance to be tested; the terahertz signal amplitude control circuit is used for changing the terahertz signal amplitude transmitted from the terahertz double-frequency oscillator circuit; the terahertz signal receiving and processing circuit module comprises: the terahertz signal processing device is used for receiving the terahertz signal and processing the terahertz signal to acquire an image with material characteristics.
Description
Technical Field
The invention relates to the technical field of terahertz near field imaging, in particular to a dual-frequency terahertz near field imaging system and method.
Background
Terahertz generally refers to electromagnetic waves with frequency of 0.1 to 10 terahertz frequency bands, is electromagnetic waves between millimeter waves and infrared light, and has the characteristics of safety, strong penetrability, broadband property, fingerprint spectrum property, no damage to human bodies or articles and the like. The advantages enable the terahertz near-field imaging technology to be applied to the aspects of security inspection and security, chemical identification, biomedical imaging, quality detection, component detection and the like. The traditional single-frequency terahertz imaging system can only detect the defects of single material characteristic, low accuracy and the like.
Disclosure of Invention
The invention aims to overcome the defects of the existing imaging system, provides a double-frequency terahertz near-field imaging system and a double-frequency terahertz near-field imaging method, can realize monolithic integration detection, improves the detection sensitivity and resolution, and realizes simultaneous detection of multiple characteristics of substances so as to improve the detection accuracy.
In order to achieve the purpose of the invention, the invention provides a dual-frequency terahertz near-field imaging system, which comprises a terahertz dual-frequency oscillator circuit module, an open ring resonator and a terahertz signal receiving and processing circuit module,
wherein, terahertz dual-frenquency oscillator circuit module: the terahertz stable output voltage signal is used as a signal source of the dual-frequency terahertz near-field imaging system and is transmitted to the split ring resonator through a transmission line;
wherein, split ring resonator: the terahertz dual-frequency oscillator circuit is used for sensing the characteristic change of a substance to be detected and changing the signal intensity of a terahertz signal output by the terahertz dual-frequency oscillator circuit according to the characteristic change rule of the substance to be detected;
wherein, terahertz signal receiving and processing circuit module: the terahertz signal is received and processed to obtain an image with the characteristic of the substance;
the terahertz double-frequency oscillator circuit module, the split ring resonator and the terahertz signal receiving and processing circuit module are integrated on the same chip.
Wherein, terahertz double-frequency oscillator circuit module, including cross coupling oscillator circuit module and digital control artificial electrolyte difference transmission line module, wherein:
the cross-coupled oscillator circuit module is used for generating a voltage signal which is stably oscillated;
and the digital control artificial electrolyte differential transmission line module is used for switching two different oscillation frequencies.
The split ring resonator has two natural resonant frequency points, and the offset directions and the offset amounts of the two natural resonant frequency points of the split ring resonator have different characteristics under different characteristics of a substance to be detected.
The split ring resonator changes the size of the terahertz signal on the transmission line through an electromagnetic coupling effect.
Wherein the terahertz signal receiving and processing circuit module comprises a signal detection circuit and a signal processing circuit,
wherein:
the signal detection circuit is used for receiving and detecting the terahertz signal and transmitting the signal to the terahertz signal processing circuit;
and the signal processing circuit is used for processing and converting the terahertz signals and calculating the difference value of the terahertz signals when no object and the object are placed so as to obtain images of the object to be detected under different characteristics.
Correspondingly, a dual-frequency terahertz near-field imaging method is also provided, and the method comprises the following steps:
(1) a cross-coupled oscillator circuit module in the terahertz double-frequency oscillator circuit module generates a terahertz voltage signal, two different frequencies are switched by the digital control artificial electrolyte differential transmission line module, and the output terahertz signal is transmitted to the split ring resonator;
(2) a substance to be detected is placed above the split ring resonator, the influence of different characteristics of the substance to be detected on two inherent resonance frequency points of the split ring resonator is different, so that the signal intensity of the terahertz signal is changed in different sizes, and the changed signal is transmitted to the terahertz signal detection circuit module through the split ring resonator;
(3) the terahertz signal detection circuit module receives terahertz signals with different frequencies and transmits the signals to the terahertz signal processing circuit;
(4) the terahertz signal processing circuit module receives the terahertz signal and processes the terahertz signal to acquire image information of material characteristics.
Compared with the prior art, the invention has the advantages that,
(1) the terahertz signal source, the sensing element and the terahertz signal processing module are integrated on the same chip, no external optical device is needed, and the imaging resolution is improved.
(2) The split ring resonator has two natural resonant frequency points, has the characteristic that the two natural resonant frequency points are opposite in offset direction under two different characteristics of substances, and can detect multiple characteristics of the substances simultaneously.
Drawings
Fig. 1 is a schematic block structure diagram of a dual-frequency terahertz near-field imaging system of the present invention.
Fig. 2 is a schematic diagram of an embodiment of the dual-frequency terahertz near-field imaging system of the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when used in this specification the singular forms "a", "an" and/or "the" include "specify the presence of stated features, steps, operations, elements, or modules, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
As shown in fig. 1, the present invention discloses a dual-frequency terahertz near-field imaging system, comprising: terahertz dual-frequency oscillator circuit module 10: the terahertz voltage signal is used for generating two frequencies which are stably output; the signal source is used for the double-frequency terahertz near-field imaging system and transmits the signal to the split ring resonator through the transmission line; split ring resonator 20: for sensing a property of a substance to be tested; the terahertz signal amplitude control circuit is used for changing the terahertz signal amplitude transmitted from the terahertz double-frequency oscillator circuit; the terahertz signal receiving and processing circuit module 30: the terahertz signal processing device is used for receiving the terahertz signal and processing the terahertz signal to acquire an image with material characteristics.
The double-frequency terahertz near-field imaging method is provided based on the double-frequency terahertz near-field imaging system, and comprises the following steps:
(1) as shown in the thz dual-frequency oscillator circuit module 10 of fig. 2, the cross-coupled oscillator circuit module generates a thz voltage signal and switches two different frequencies through the digitally controlled artificial electrolyte differential transmission line module. The output terahertz signal is transmitted to the split ring resonator 20.
(2) The substance to be detected is placed above the split ring resonator 20, the different characteristics of the substance to be detected have different influences on the two inherent resonance frequency points of the split ring resonator, so that the signal intensity of the terahertz signal is changed differently, and the changed signal is transmitted to the terahertz signal detection circuit module through the split ring resonator 20.
(3) The terahertz signal detection circuit module receives terahertz signals with different frequencies and transmits the signals to the terahertz signal processing circuit;
(4) the terahertz signal processing circuit module receives the terahertz signal and processes the terahertz signal to acquire image information of material characteristics.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A dual-frequency terahertz near-field imaging system is characterized by comprising a terahertz dual-frequency oscillator circuit module, an open ring resonator and a terahertz signal receiving and processing circuit module,
wherein, terahertz dual-frenquency oscillator circuit module: the terahertz stable output voltage signal is used as a signal source of the dual-frequency terahertz near-field imaging system and is transmitted to the split ring resonator through a transmission line;
wherein, split ring resonator: the terahertz dual-frequency oscillator circuit is used for sensing the characteristic change of a substance to be detected and changing the signal intensity of a terahertz signal output by the terahertz dual-frequency oscillator circuit according to the characteristic change rule of the substance to be detected;
wherein, terahertz signal receiving and processing circuit module: the terahertz signal is received and processed to obtain an image with the characteristic of the substance;
the terahertz double-frequency oscillator circuit module, the split ring resonator and the terahertz signal receiving and processing circuit module are integrated on the same chip.
2. The dual-frequency terahertz near-field imaging system of claim 1,
the terahertz dual-frequency oscillator circuit module comprises a cross-coupled oscillator circuit module and a digital control artificial electrolyte differential transmission line module, wherein:
the cross-coupled oscillator circuit module is used for generating a voltage signal which is stably oscillated;
and the digital control artificial electrolyte differential transmission line module is used for switching two different oscillation frequencies.
3. The dual-frequency terahertz near-field imaging system of claim 1,
the split ring resonator has two inherent resonance frequency points, and under different characteristics of a substance to be detected, the offset directions and the offset amounts of the two inherent resonance frequency points of the split ring resonator have different characteristics.
4. The dual-frequency terahertz near-field imaging system of claim 3, wherein the split-ring resonator changes the magnitude of the terahertz signal on the transmission line through electromagnetic coupling.
5. The dual-frequency terahertz near-field imaging system of claim 1, wherein the terahertz signal receiving and processing circuit module comprises a signal detection circuit and a signal processing circuit,
wherein:
the signal detection circuit is used for receiving and detecting the terahertz signal and transmitting the signal to the terahertz signal processing circuit;
and the signal processing circuit is used for processing and converting the terahertz signals and calculating the difference value of the terahertz signals when no object and the object are placed so as to obtain images of the object to be detected under different characteristics.
6. A dual-frequency terahertz near-field imaging method is characterized by comprising the following steps:
(1) a cross-coupled oscillator circuit module in the terahertz double-frequency oscillator circuit module generates a terahertz voltage signal, two different frequencies are switched by the digital control artificial electrolyte differential transmission line module, and the output terahertz signal is transmitted to the split ring resonator;
(2) a substance to be detected is placed above the split ring resonator, the influence of different characteristics of the substance to be detected on two inherent resonance frequency points of the split ring resonator is different, so that the signal intensity of the terahertz signal is changed in different sizes, and the changed signal is transmitted to the terahertz signal detection circuit module through the split ring resonator;
(3) the terahertz signal detection circuit module receives terahertz signals with different frequencies and transmits the signals to the terahertz signal processing circuit;
(4) the terahertz signal processing circuit module receives the terahertz signal and processes the terahertz signal to acquire image information of material characteristics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910910854.6A CN112557339A (en) | 2019-09-25 | 2019-09-25 | Double-frequency terahertz near-field imaging system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910910854.6A CN112557339A (en) | 2019-09-25 | 2019-09-25 | Double-frequency terahertz near-field imaging system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112557339A true CN112557339A (en) | 2021-03-26 |
Family
ID=75029231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910910854.6A Pending CN112557339A (en) | 2019-09-25 | 2019-09-25 | Double-frequency terahertz near-field imaging system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112557339A (en) |
Citations (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006033803A (en) * | 2004-06-15 | 2006-02-02 | Matsushita Electric Ind Co Ltd | Voltage-controlled oscillator, and pll circuit and wireless communications apparatus using the same |
| CN1771624A (en) * | 2003-04-24 | 2006-05-10 | 松下电器产业株式会社 | High-frequency circuit |
| US20070247242A1 (en) * | 2006-04-10 | 2007-10-25 | Samsung Electro-Mechanics Co., Ltd. | Quadrature voltage-controlled oscillator |
| US20080150644A1 (en) * | 2005-03-08 | 2008-06-26 | Kenichi Hosoya | Voltage Controlled Oscillator and Frequency Control Method of the Voltage Controlled Oscillator |
| US20090262766A1 (en) * | 2006-10-19 | 2009-10-22 | Houtong Chen | Active terahertz metamaterial devices |
| CN101566589A (en) * | 2008-12-15 | 2009-10-28 | 深圳先进技术研究院 | Terahertz imaging device and terahertz imaging method |
| US20090273403A1 (en) * | 2008-05-05 | 2009-11-05 | Damir Ismailov | Trigger-mode distributed wave oscillator system |
| CN201403090Y (en) * | 2009-01-16 | 2010-02-10 | 环旭电子股份有限公司 | Radio frequency circuit with different switchable oscillation frequencies |
| US20100214026A1 (en) * | 2007-10-10 | 2010-08-26 | Georgia Tech Research Corporation | Millimeter-wave wideband voltage controlled oscillator |
| US20100295635A1 (en) * | 2009-05-20 | 2010-11-25 | Eva Schubert | Terahertz Resonator |
| US20130141174A1 (en) * | 2010-06-02 | 2013-06-06 | Centre National De La Recherche Scientifique | Oscillator for generating a signal comprising a terahertz-order frequency using the beat of two optical waves |
| US20130169374A1 (en) * | 2011-12-29 | 2013-07-04 | Industrial Technology Research Institute | Voltage controlled oscillator |
| US20130271230A1 (en) * | 2012-04-17 | 2013-10-17 | Ming Li | Integrated standing-wave voltage controlled oscillator with dual-mode coplanar waveguide resonator |
| US20140166868A1 (en) * | 2012-12-17 | 2014-06-19 | Wave Works, Inc. | TRAVELING WAVE BASED THz SIGNAL GENERATION SYSTEM and METHOD THEREOF |
| CN103984124A (en) * | 2014-05-15 | 2014-08-13 | 东南大学 | Multi-frequency response TeraHertz wave modulator |
| US20140231648A1 (en) * | 2013-02-20 | 2014-08-21 | Battelle Energy Alliance, Llc | Terahertz imaging devices and systems, and related methods, for detection of materials |
| CN104201443A (en) * | 2014-08-14 | 2014-12-10 | 上海师范大学 | Dual-frequency terahertz band-pass filter |
| US20150276489A1 (en) * | 2012-11-27 | 2015-10-01 | The University Court Of The University Of Glasgow | Terahertz radiation detector, focal plane array incorporating terahertz detector, multispectral metamaterial absorber, and combined optical filter and terahertz absorber |
| CN105676482A (en) * | 2016-01-11 | 2016-06-15 | 电子科技大学 | Terahertz modulator based on mode coupling |
| CN106026924A (en) * | 2016-05-11 | 2016-10-12 | 复旦大学 | Terahertz wave CMOS injection-locking frequency multiplier applied to bioimaging |
| WO2017038714A1 (en) * | 2015-08-28 | 2017-03-09 | 国立大学法人大阪大学 | Device for measurement, and measurement apparatus using same |
| CN206114926U (en) * | 2016-09-09 | 2017-04-19 | 深圳市太赫兹系统设备有限公司 | Terahertz imaging system and terahertz be safety inspection device now |
| US9923599B1 (en) * | 2017-04-20 | 2018-03-20 | City University Of Hong Kong | Terahertz injection-locked radiator |
| CN108369263A (en) * | 2015-11-27 | 2018-08-03 | 赫姆霍茨中心柏林材料与能源有限公司 | Equipment for the magnetic resonance for generating and detecting sample |
| CN109283155A (en) * | 2018-11-12 | 2019-01-29 | 桂林电子科技大学 | A kind of terahertz wave band Meta Materials sensor |
| CN109580535A (en) * | 2018-12-03 | 2019-04-05 | 上海理工大学 | For enhancing the metamaterial structure of THz wave detection tissue of biological cells signal |
| US20190190453A1 (en) * | 2017-12-20 | 2019-06-20 | Globalfoundries Inc. | Power amplifier for millimeter wave devices |
-
2019
- 2019-09-25 CN CN201910910854.6A patent/CN112557339A/en active Pending
Patent Citations (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1771624A (en) * | 2003-04-24 | 2006-05-10 | 松下电器产业株式会社 | High-frequency circuit |
| JP2006033803A (en) * | 2004-06-15 | 2006-02-02 | Matsushita Electric Ind Co Ltd | Voltage-controlled oscillator, and pll circuit and wireless communications apparatus using the same |
| US20080150644A1 (en) * | 2005-03-08 | 2008-06-26 | Kenichi Hosoya | Voltage Controlled Oscillator and Frequency Control Method of the Voltage Controlled Oscillator |
| US20070247242A1 (en) * | 2006-04-10 | 2007-10-25 | Samsung Electro-Mechanics Co., Ltd. | Quadrature voltage-controlled oscillator |
| US20090262766A1 (en) * | 2006-10-19 | 2009-10-22 | Houtong Chen | Active terahertz metamaterial devices |
| US20100214026A1 (en) * | 2007-10-10 | 2010-08-26 | Georgia Tech Research Corporation | Millimeter-wave wideband voltage controlled oscillator |
| US20090273403A1 (en) * | 2008-05-05 | 2009-11-05 | Damir Ismailov | Trigger-mode distributed wave oscillator system |
| CN101566589A (en) * | 2008-12-15 | 2009-10-28 | 深圳先进技术研究院 | Terahertz imaging device and terahertz imaging method |
| CN201403090Y (en) * | 2009-01-16 | 2010-02-10 | 环旭电子股份有限公司 | Radio frequency circuit with different switchable oscillation frequencies |
| US20100295635A1 (en) * | 2009-05-20 | 2010-11-25 | Eva Schubert | Terahertz Resonator |
| US20130141174A1 (en) * | 2010-06-02 | 2013-06-06 | Centre National De La Recherche Scientifique | Oscillator for generating a signal comprising a terahertz-order frequency using the beat of two optical waves |
| US20130169374A1 (en) * | 2011-12-29 | 2013-07-04 | Industrial Technology Research Institute | Voltage controlled oscillator |
| US20130271230A1 (en) * | 2012-04-17 | 2013-10-17 | Ming Li | Integrated standing-wave voltage controlled oscillator with dual-mode coplanar waveguide resonator |
| US20150276489A1 (en) * | 2012-11-27 | 2015-10-01 | The University Court Of The University Of Glasgow | Terahertz radiation detector, focal plane array incorporating terahertz detector, multispectral metamaterial absorber, and combined optical filter and terahertz absorber |
| US20140166868A1 (en) * | 2012-12-17 | 2014-06-19 | Wave Works, Inc. | TRAVELING WAVE BASED THz SIGNAL GENERATION SYSTEM and METHOD THEREOF |
| US20140231648A1 (en) * | 2013-02-20 | 2014-08-21 | Battelle Energy Alliance, Llc | Terahertz imaging devices and systems, and related methods, for detection of materials |
| CN103984124A (en) * | 2014-05-15 | 2014-08-13 | 东南大学 | Multi-frequency response TeraHertz wave modulator |
| CN104201443A (en) * | 2014-08-14 | 2014-12-10 | 上海师范大学 | Dual-frequency terahertz band-pass filter |
| WO2017038714A1 (en) * | 2015-08-28 | 2017-03-09 | 国立大学法人大阪大学 | Device for measurement, and measurement apparatus using same |
| CN108369263A (en) * | 2015-11-27 | 2018-08-03 | 赫姆霍茨中心柏林材料与能源有限公司 | Equipment for the magnetic resonance for generating and detecting sample |
| CN105676482A (en) * | 2016-01-11 | 2016-06-15 | 电子科技大学 | Terahertz modulator based on mode coupling |
| CN106026924A (en) * | 2016-05-11 | 2016-10-12 | 复旦大学 | Terahertz wave CMOS injection-locking frequency multiplier applied to bioimaging |
| CN206114926U (en) * | 2016-09-09 | 2017-04-19 | 深圳市太赫兹系统设备有限公司 | Terahertz imaging system and terahertz be safety inspection device now |
| US9923599B1 (en) * | 2017-04-20 | 2018-03-20 | City University Of Hong Kong | Terahertz injection-locked radiator |
| US20190190453A1 (en) * | 2017-12-20 | 2019-06-20 | Globalfoundries Inc. | Power amplifier for millimeter wave devices |
| US20190288646A1 (en) * | 2017-12-20 | 2019-09-19 | Globalfoundries Inc. | Power amplifier for millimeter wave devices |
| CN109283155A (en) * | 2018-11-12 | 2019-01-29 | 桂林电子科技大学 | A kind of terahertz wave band Meta Materials sensor |
| CN109580535A (en) * | 2018-12-03 | 2019-04-05 | 上海理工大学 | For enhancing the metamaterial structure of THz wave detection tissue of biological cells signal |
Non-Patent Citations (5)
| Title |
|---|
| 王志平等: "一种38.4～43.4 GHz CMOS压控振荡器", 《微电子学》 * |
| 米洋等: "方形半环半槽双频带太赫兹滤波器的设计研究", 《低温物理学报》 * |
| 耿彦峰等: "差分双频滤波天线设计", 《测试技术学报》 * |
| 苏国东等: "126.6～128.1 GHz基波压控振荡器设计", 《浙江大学学报(工学版)》 * |
| 邢维等: "高品质因数太赫兹超材料设计的仿真分析", 《中国激光》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7259859B2 (en) | Terahertz modulation spectrometer | |
| SE9903348L (en) | Apparatus and method for detecting foreign bodies in products | |
| CN107505603A (en) | Method and apparatus for test carriage with the transmitting attribute and reflecting attribute of antenna cover body | |
| WO2021191768A3 (en) | Microelectronic sensors for detection of analytes, devices and methods using the same | |
| EP1046900A3 (en) | Optical heterodyne detection for cavity ring-down spectroscopy | |
| US8537881B2 (en) | Method and apparatus for detecting offset signal of transmission leakage signal in RF transceiver | |
| JPH1183996A (en) | Millimetric wave detector | |
| CN111721839A (en) | High-sensitivity ultrasonic detection method based on digital optical frequency comb and microcavity array | |
| US20100156629A1 (en) | Mems devices and remote sensing systems utilizing the same | |
| US3921169A (en) | Multiple mode radiometric system with range detection capability | |
| US10135553B2 (en) | Measuring system for over-the-air power measurements | |
| CN104914050B (en) | A kind of device and method improving optoacoustic spectroscopy detection sensitivity | |
| CN112557339A (en) | Double-frequency terahertz near-field imaging system and method | |
| CN113465633B (en) | Microwave resonant sensor for software intelligent detection and frequency shift detection method thereof | |
| CN113252598B (en) | Full-electronics terahertz near-field spectrum comprehensive test device and method | |
| KR101128876B1 (en) | Measuring Apparatus using Terahertz Wave | |
| US11692869B2 (en) | Measuring apparatus with a passive cooperative target | |
| KR102152133B1 (en) | Millimeter wave radiometer system | |
| Nuessler et al. | Swifter security scanning: millimeter-wave imaging with spin | |
| US10735168B2 (en) | Method and interrogation device for interrogating data from a passive element | |
| US20060109100A1 (en) | Apparatus for sensing tire information, reducing distortion of amplitude-modulated wave | |
| US20200271576A1 (en) | System for capturing point values for constituting an image with terahertz radiation | |
| US20150377782A1 (en) | Terahertz system | |
| US10475317B2 (en) | Single-element door\window opening detector | |
| Zhao et al. | A Quasi-optical THz Imaging System Using a One-port Vector Network Analyser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210326 |