CN104038706A - Terahertz passive type color focal plane-based camera - Google Patents
Terahertz passive type color focal plane-based camera Download PDFInfo
- Publication number
- CN104038706A CN104038706A CN201310073017.5A CN201310073017A CN104038706A CN 104038706 A CN104038706 A CN 104038706A CN 201310073017 A CN201310073017 A CN 201310073017A CN 104038706 A CN104038706 A CN 104038706A
- Authority
- CN
- China
- Prior art keywords
- terahertz
- signal
- module
- antenna
- road
- 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.)
- Granted
Links
Landscapes
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Provided in the invention is a terahertz passive type color focal plane-based camera comprising an antenna feeder module, a terahertz focal plane multichannel coherent receiver module, an intermediate frequency signal processing module, and a local oscillator reference source. The receiver module is located at a focal plane of a reflector antenna of the antenna feeder module; and a terahertz radio frequency signal sent by a detected object is reflected by the reflector antenna and then is focused at the receiver module. The receiver module includes a terahertz multi-beam quasi-optical mixer having N1*N2 pixels; and the received terahertz radio frequency signal and terahertz local oscillator signal are mixed to generate N1*N2 paths of mixing output signals. The intermediate frequency signal processing module carries out processing on the N1*N2 paths of mixing output signals to output N1*N2*W paths of intermediate frequency signals, wherein the W value is consistent with the number of terahertz frequencies of preprocessed detected object radiation waves. According to the invention, the object identification capability in the complex background environment can be improved; and real-time imaging is realized. The resolution ratio and the sensitivity are high.
Description
Technical field
The present invention relates to THz imaging technology field, be specifically related to the colored focal plane of a kind of Terahertz passive type camera.
Background technology
Terahertz (Terahertz, THz) ripple is commonly referred to as frequency, and at 0.1THz～10THz, (wavelength 3mm～30 μ is the electromagnetic radiation (1THz=10 in scope m)
12hz), it in electromagnetic spectrum between microwave and infrared radiation.Terahertz radiation can have following features in imaging applications: terahertz radiation can penetrate a lot of common nonmetal coverage materials, detects concealment object; The wavelength of THz wave is enough short, can obtain higher imaging space resolution, or realizes danger hi-Fix; The electromagenetic wave radiation of Terahertz frequency is non-ionized to organism, therefore under suitable intensity, uses, safer to human body; Than microwave and millimeter wave imaging system, under same image resolution ratio, terahertz imaging system bulk is less.The These characteristics of terahertz emission has determined that terahertz imaging has broad application prospects, and is one of international study hotspot.
But there are some problems in current terahertz imaging equipment:
1, be usually operated at a frequency.Adopt single Terahertz frequency, although can effectively find target and to realization of goal imaging, due to the complexity of target emanation characteristic, effectively have problems in target emanation intensity or feature identification.
2. conventionally adopt single picture element scan structure, can not real time imagery, resolution has much room for improvement.
3. conventionally adopt direct detection mode, or the heterodyne reception mode of less pixel.If adopt direct detection mode, although can easier realize the focal plane imaging of large scale array, sensitivity is lower and lacked phase information; If adopt heterodyne reception mode, each passage all needs local oscillation signal, and therefore intermediate-frequency circuit complexity and volume are larger, are not suitable for portable use.
Summary of the invention
Technical problem to be solved by this invention is the above-mentioned shortcoming that overcomes prior art, the colored focal plane of a kind of Terahertz passive type camera is provided, can under complex background environment, improve the recognition capability of target, real time imagery, there is good resolution and higher sensitivity, have little, the simple intermediate-frequency circuit of volume, be applicable to the extensive Cheng Zhen of two dimension, the receiver volume and weight of entirety is little.
The colored focal plane of a kind of Terahertz passive type provided by the invention camera comprises antenna feeder module, Terahertz focal plane multichannel coherent receiver module, intermediate-freuqncy signal processing module, local oscillator reference source; Antenna feeder module comprises reflector antenna and antenna servo module, reflector antenna in antenna feeder module is for receiving the Terahertz radiofrequency signal that detected target sends, and reflector antenna scans the Terahertz radiofrequency signal of measured target under the control of antenna servo module; Terahertz focal plane multichannel coherent receiver module is positioned on the focal plane of reflector antenna, and the reflection of the reflector antenna of the Terahertz radiofrequency signal that detected target sends in antenna feeder module focuses on Terahertz focal plane multichannel coherent receiver module; Terahertz focal plane multichannel coherent receiver module comprises the quasi-optical frequency mixer of Terahertz multi-beam, the quasi-optical frequency mixer of Terahertz multi-beam comprises N1 × N2 pixel, the Terahertz radiofrequency signal of receiving and Terahertz local oscillation signal are carried out mixing by the quasi-optical frequency mixer of Terahertz multi-beam, produce N1 × N2 road mixer output signal, N1, N2 are >=1 natural number, the corresponding pixel of each road mixer output signal, each road mixer output signal is called each pixel mixer output signal; Intermediate-freuqncy signal processing module comprises double conversion module, double conversion module comprises N1 × N2 intermediate-freuqncy signal device, each intermediate-freuqncy signal device carries out one point of W road power division, filtering, low noise amplification, secondary mixing processing successively to each road mixer output signal, output N1 × N2 × W road intermediate-freuqncy signal, the Terahertz frequency number of the THz wave that the value of W gives off with pretreated detected target is consistent, the natural number that W is >=1.
The colored focal plane of Terahertz passive type of the present invention camera has following beneficial effect with respect to prior art:
1, compare and need single pixel camera of scanning, focal plane camera has advantages of as follows: 1) can real time imagery, and can be to fast-moving target imaging; 2) have good resolution and higher sensitivity, because adopt focal plane starring array, antenna does not need scanning, and opticator just can do largerly, thereby can obtain good resolution; Because not limited by sweep speed, therefore likely obtain higher sensitivity.
2, focal plane of the present invention camera can be operated in multiple frequencies, owing to receiving multiple frequency radiation signals of a target, can realize the recognition capability of (for example, in the situation that target and background radiation intensity contrast are very low or under the radiation/reflection interference such as sunlight) raising target under complex background environment.
3, it is integrated that the quasi-optical frequency mixer of Terahertz multi-beam and intermediate-freuqncy signal processing module adopt LTCC packaging technology, realize integrated three-dimensional three-dimensional encapsulation, Terahertz of the present invention focal plane multi channel imaging system adopts the quasi-optical frequency mixer of Terahertz multi-beam as main reception and frequency converting element, integrated level is high, is very suitable for the extensive Cheng Zhen of two dimension; Be applicable to the extensive Cheng Zhen of two dimension, the receiver volume and weight of entirety is little, is convenient for carrying; The present invention adopts high resistance medium lens can avoid the generation of mixing antenna surface ripple, improve the gain of antenna, reduce surface wave loss, and can improve the directivity of antenna, high resistance medium lens adopt fly's-eye lens, therefore in the time of concrete imaging applications, array structure is more flexible, goes for the occasion such as large visual field or focal length imaging far away.
4, the present invention adopts beam splitter can effectively improve the isolation of radiofrequency signal and local oscillation signal.
5, occupation mode is flexible, in the time that needs carry out large view field imaging, can scan secondary mirror, realizes wide view field imaging.
6, can domestic autonomous production, and along with the quantity of product promotes, cost significantly reduces.
Brief description of the drawings
It should be noted that the accompanying drawing in the following describes only schematically shows some embodiment, does not comprise all possible embodiment.
Fig. 1 is the schematic diagram of the embodiment of the colored focal plane of Terahertz passive type camera;
Fig. 2 is the schematic diagram of antenna feeder modular structure embodiment and the part signal schematic flow sheet of the colored focal plane camera embodiment of Terahertz passive type;
Fig. 3 is the schematic diagram of the embodiment of the quasi-optical frequency mixer of Terahertz multi-beam;
Fig. 4 is the network topology structure schematic diagram of the embodiment of intermediate-freuqncy signal processing module.
Embodiment
The technical scheme of exemplary embodiment of the present invention is described below in conjunction with accompanying drawing.Obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiment.Described embodiment is only for illustrating, instead of limitation of the scope of the invention.Based on embodiments of the invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Although used first, second grade of word to describe multiple elements or component part in the application, these elements or component part should not be subject to the restriction of these words.These words are only for distinguishing an element or component part and another element or component part, and do not comprise " sequentially ".Therefore, by the first element discussed below or component part is called the second element or component part does not exceed the spirit and scope of the present invention yet.
Fig. 1 shows the schematic diagram of the embodiment of the colored focal plane of a kind of Terahertz passive type camera.As shown in Figure 1, a kind of Terahertz passive type color camera comprises antenna feeder module, Terahertz focal plane multichannel coherent receiver module, intermediate-freuqncy signal processing module, local oscillator reference source, mould/number conversion and stores processor module, digital signal processing module, demonstration and control module and power module.
Antenna feeder module comprises reflector antenna and antenna servo module, and reflector antenna is for receiving the Terahertz radiofrequency signal that detected target sends, and reflector antenna scans the Terahertz radiofrequency signal of measured target under the control of antenna servo module.Reflector antenna in antenna feeder module can adopt defocusing Cassegrain antenna, and defocusing Cassegrain antenna comprises main parabola and secondary reflection face, the THz wave of sending for receiving detected target.Terahertz focal plane multichannel coherent receiver module is positioned on the focal plane of reflector antenna, and the Terahertz radiofrequency signal that detected target sends, through the reflection of main parabola and secondary reflection face, focuses on Terahertz focal plane multichannel coherent receiver module; Antenna servo module controls secondary reflection face, in the time that needs increase visual field, can realize the imaging to large visual field detected target by the scanning of secondary reflection face, as shown in Figure 2.
Wherein, leading paraboloidal bore D meets:
Wherein, θ
3dBfor the spatial resolution of Terahertz focal plane multi channel imaging system, λ
0the wavelength of the THz wave giving off for detected target.What rad (radian) represented is the size at the big or small angle at angle.
Terahertz focal plane multichannel coherent receiver module comprises beam splitter, the quasi-optical frequency mixer of Terahertz multi-beam and Terahertz local oscillator frequency multiplier.Terahertz local oscillator frequency multiplier is for generation of Terahertz local oscillation signal, and the local oscillation signal that local oscillator reference source produces, by after Terahertz local oscillator frequency multiplier frequency multiplication, produces Terahertz local oscillation signal; Beam splitter is for controlling the spatial direction of Terahertz local oscillation signal, and hereby local oscillation signal of transmission Terahertz radiofrequency signal and reflected terahertz, makes Terahertz radiofrequency signal and Terahertz local oscillation signal jointly pass to the quasi-optical frequency mixer of Terahertz multi-beam.Terahertz multi-beam is prepared frequency mixer and is comprised N1 × N2 pixel; The Terahertz radiofrequency signal of receiving and Terahertz local oscillation signal are carried out mixing by the quasi-optical frequency mixer of Terahertz multi-beam, produces N1 × N2 road mixer output signal; N1, N2 are >=1 natural number, the corresponding pixel of each road mixer output signal, and each road mixer output signal is called each pixel mixer output signal.
The quasi-optical frequency mixer of Terahertz multi-beam comprises high resistance medium lens and mixing antenna chip, as shown in Fig. 3 shape.N1 × N2 that mixing antenna chip comprises same structure mixing antenna, is arranged in N1 capable, N2 row.High resistance medium lens adopt fly's-eye lens, and fly's-eye lens comprises lenslet array and spread footing, and lenslet array is positioned on spread footing, and lenslet is realized the transmission between signal by spread footing and mixing antenna; Lenslet array comprises N1 × N2 lenslet, and lenslet is corresponding one by one with mixing antenna, being centered close on same axis of the center of the lenslet mixing antenna corresponding with it, and a pixel comprises a mixing antenna and a lenslet.
Adopt quasi-optical mixing structure, i.e. the quasi-optical frequency mixer of Terahertz multi-beam, comprises high resistance medium lens and the mixing antenna chip of compound eye structural.Wherein the high resistance medium lens of compound eye structural are broadband response devices, and therefore, the response frequency of the quasi-optical frequency mixer of Terahertz multi-beam depends primarily on the response frequency of mixing antenna chip.The reception of the multiple frequency signals that radiate for realize target, the on-chip antenna form that in mixing antenna chip, each pixel adopts adopts wide band antenna form, such as helical antenna, logarithm periodic antenna etc.; Or adopt the antenna structure that can respond in several frequencies.
Fig. 4 shows the network topology structure schematic diagram of the embodiment of intermediate-freuqncy signal processing module.Intermediate-freuqncy signal processing module comprises double conversion module, double conversion module comprises N1 × N2 signal process unit of intermediate frequency, each intermediate-freuqncy signal device carries out one point of W road power division, filtering, low noise amplification, secondary mixing processing successively to each road mixer output signal, output N1 × N2 × W road intermediate-freuqncy signal, is the Terahertz frequency number of the THz wave that the value of W gives off with pretreated detected target consistent, the integer (natural number that W is >=1?).
Each signal process unit of intermediate frequency of intermediate-freuqncy signal processing module is processed each road mixer output signal, intermediate-freuqncy signal device comprises one point of W road power divider, filter, low noise amplifier, secondary mixing device and frequency multiplier, each road mixer output signal all can be through one point of W road power divider, then distinguish device after filtering, low noise amplifier, secondary mixing device, from secondary mixing device output intermediate-freuqncy signal, export altogether N1 × N2 × W road intermediate-freuqncy signal, wherein, each road mixer output signal of quasi-optical Terahertz multi-beam frequency mixer output is divided into W road by described one point of W road power divider,
The local oscillation signal that local oscillator reference source produces, by after the frequency multiplier frequency multiplication of intermediate-freuqncy signal processing module, produces the local oscillation signal of secondary mixing.
For example, W=3, gets target emanation and goes out three frequencies in terahertz signal; Described three frequencies for example can be got 220.5GHz, 340.2GHz, 450.1GHz, and for example Terahertz local oscillation signal frequency is 100GHz; , for 220.5GHz, utilize 2 mixing, output 20.5GHz signal; For 340.2GHz, utilize 3 mixing, output 40.2GHz signal; For 450.1GHz, utilize 4 mixing, output 50.1GHz signal.In the time of W=3, described one point of W road power divider is one point of No. 3 power divider.
Each pixel mixer output signal of quasi-optical Terahertz multi-beam frequency mixer output is divided into 3 road signals by described one point of No. 3 power divider, described 3 road signals comprise first via signal, the second road signal, Third Road signal, filter comprises the first filter, the second filter, the 3rd filter, first via signal is by the first filter, the first filter output 20.5GHz signal, the second road signal is by the second filter, the second filter output 40.2GHz signal, Third Road signal is by the 3rd filter, the 3rd filter output 50.1GHz signal, for 20.5GHz signal, 40.2GHz signal, 50.1GHz signal, (for example local oscillator reference source is 10GHz to pass through respectively secondary mixing device again, respectively through 2 times, 4 times and 5 frequencys multiplication) carry out secondary mixing, output 500MHz, 200MHz, the intermediate-freuqncy signal of 100MHz, as shown in Figure 4.
Mould/number conversion and stores processor module are sampled, quantize, are encoded the intermediate-freuqncy signal of intermediate frequency signal processing module output, and intermediate-freuqncy signal is transformed into digital intermediate frequency signal and stores, and digital intermediate frequency signal are exported to digital signal processing module simultaneously.
Digital signal processing module, according to acquired original data, converts the digital intermediate frequency signal of each passage output to radiation temperature value according to calibration equation, and finally converts gradation of image data to, and gradation of image data are sent to and shown and control module.
Show with control module and be used for display gray shade value image, and control antenna servo module, the mechanical scanning of implementation space wave beam.
Power module is for to antenna servo module, Terahertz local oscillator frequency multiplier, local oscillator reference source, intermediate-freuqncy signal processing module, mould/number conversion and stores processor module, and demonstration and control module provide electric current or voltage.
The quasi-optical frequency mixer of Terahertz multi-beam and intermediate-freuqncy signal processing module adopt LTCC packaging technology integrated, have realized integrated three-dimensional three-dimensional encapsulation.Although along with the development of integrated chip technology, it is integrated that a lot of radio frequency active circuit can be realized miniaturization monolithic, even that passive device can not be realized at IC interior is integrated, become the main devices that occupies circuit two dimension chip area.This equipment makes full use of LTCC technique, there is 3 D stereoization encapsulation feature, the double conversion module of intermediate-freuqncy signal processing module be embedded in the lower surface cavity of the encapsulation based on LTCC or Surface Mount on LTCC lower surface substrate, the mixing antenna chip of the quasi-optical frequency mixer of Terahertz multi-beam is positioned at ltcc substrate top.Adopt 3 D stereo package design mode, realized the two-dimension plane structure of traditional circuit to the transformation of 3 D stereo encapsulating structure, greatly reduced the volume and weight of equipment.In addition, owing to having adopted integrated process, avoid the necessary loaded down with trivial details assembling of original discrete system and debug process, thereby improved the global reliability of system.
Adopt quasi-optical mixing structure, i.e. the quasi-optical frequency mixer of Terahertz multi-beam, comprises high resistance medium lens and the mixing antenna chip of compound eye structural.Wherein the high resistance medium lens of compound eye structural are broadband response devices, and therefore, the response frequency of the quasi-optical frequency mixer of Terahertz multi-beam depends primarily on the response frequency of mixing antenna chip.The reception of the multiple frequency signals that radiate for realize target, the on-chip antenna form that in mixing antenna chip, each pixel adopts adopts wide band antenna form, such as helical antenna, logarithm periodic antenna etc.; Or adopt the antenna structure that can respond in several frequencies.
Above to the description of embodiments of the invention only for technical scheme of the present invention is described; instead of limitation of the scope of the invention; the present invention is not limited to disclosed these embodiment; the technical scheme that those skilled in the art can record aforementioned each embodiment is modified; or part technical characterictic is wherein equal to replacement, and these amendments or replace and all should fall into protection scope of the present invention.
Claims (10)
1. the colored focal plane of a Terahertz passive type camera, is characterized in that, described camera comprises antenna feeder module, Terahertz focal plane multichannel coherent receiver module, intermediate-freuqncy signal processing module,
Antenna feeder module comprises reflector antenna and antenna servo module, reflector antenna in antenna feeder module is for receiving the Terahertz radiofrequency signal that detected target sends, and reflector antenna scans the Terahertz radiofrequency signal of measured target under the control of antenna servo module;
Terahertz focal plane multichannel coherent receiver module is positioned on the focal plane of reflector antenna, and the reflection of the reflector antenna of the Terahertz radiofrequency signal that detected target sends in antenna feeder module focuses on Terahertz focal plane multichannel coherent receiver module; Terahertz focal plane multichannel coherent receiver module comprises the quasi-optical frequency mixer of Terahertz multi-beam, the quasi-optical frequency mixer of Terahertz multi-beam comprises N1 × N2 pixel, the Terahertz radiofrequency signal of receiving and Terahertz local oscillation signal are carried out mixing by the quasi-optical frequency mixer of Terahertz multi-beam, produce N1 × N2 road mixer output signal, N1, N2 are >=1 natural number, the corresponding pixel of each road mixer output signal, each road mixer output signal is called each pixel mixer output signal;
Intermediate-freuqncy signal processing module comprises double conversion module, double conversion module comprises N1 × N2 intermediate-freuqncy signal device, each intermediate-freuqncy signal device carries out one point of W road power division, filtering, low noise amplification, secondary mixing processing successively to each road mixer output signal, output N1 × N2 × W road intermediate-freuqncy signal, the Terahertz frequency number of the THz wave that the value of W gives off with pretreated detected target is consistent, the natural number that W is >=1.
2. Terahertz passive type color camera as claimed in claim 1, is characterized in that: the reflector antenna in antenna feeder module adopts defocusing Cassegrain antenna, and defocusing Cassegrain antenna comprises main parabola and secondary reflection face; The main parabola of the Terahertz radiofrequency signal that detected target sends in antenna feeder module and the reflection of secondary reflection face, focus on Terahertz focal plane multichannel coherent receiver module;
Antenna servo module controls secondary reflection face, realizes the imaging to large visual field detected target by the scanning of secondary reflection face.
3. Terahertz passive type color camera as claimed in claim 2, is characterized in that: main paraboloidal bore D meets:
Wherein, θ
3dBfor the spatial resolution of Terahertz focal plane multi channel imaging system, λ
0the wavelength of the THz wave giving off for detected target.
4. Terahertz passive type color camera as claimed in claim 1, is characterized in that:
Described camera also comprises local oscillator reference source;
Terahertz focal plane multichannel coherent receiver module also comprises beam splitter, Terahertz local oscillator frequency multiplier, and the local oscillation signal that local oscillator reference source produces produces Terahertz local oscillation signal after by Terahertz local oscillator frequency multiplier frequency multiplication; Beam splitter is for controlling the spatial direction of Terahertz local oscillation signal, and hereby local oscillation signal of transmission Terahertz radiofrequency signal and reflected terahertz, makes Terahertz radiofrequency signal and Terahertz local oscillation signal jointly pass to the quasi-optical frequency mixer of Terahertz multi-beam.
5. Terahertz passive type color camera as claimed in claim 4, is characterized in that: the quasi-optical frequency mixer of Terahertz multi-beam comprises high resistance medium lens and mixing antenna chip; N1 × N2 that mixing antenna chip comprises same structure mixing antenna, is arranged in N1 capable, N2 row; High resistance medium lens adopt fly's-eye lens, and fly's-eye lens comprises lenslet array and spread footing, and lenslet array is positioned on spread footing, and lenslet is realized the transmission between signal by spread footing and mixing antenna; Lenslet array comprises N1 × N2 lenslet, and lenslet is corresponding one by one with mixing antenna, being centered close on same axis of the center of the lenslet mixing antenna corresponding with it, and a pixel comprises a mixing antenna and a lenslet.
6. the Terahertz passive type color camera as described in arbitrary claim of claim 1-5, is characterized in that:
Each signal process unit of intermediate frequency of intermediate-freuqncy signal processing module is processed each road mixer output signal, signal process unit of intermediate frequency comprises one point of W road power divider, filter, low noise amplifier, secondary mixing device and frequency multiplier, each road mixer output signal all can be through one point of W road power divider, then distinguish device after filtering, low noise amplifier, secondary mixing device, from secondary mixing device output intermediate-freuqncy signal, export altogether N1 × N2 × W road intermediate-freuqncy signal, wherein, each road mixer output signal of quasi-optical Terahertz multi-beam frequency mixer output is divided into W road by described one point of W road power divider,
Be further characterized in that: described camera comprises local oscillator reference source, the local oscillation signal that local oscillator reference source produces, by after the frequency multiplier frequency multiplication of intermediate-freuqncy signal processing module, produces the local oscillation signal of secondary mixing.
7. Terahertz passive type color camera as claimed in claim 1, is characterized in that:
Described camera also comprises mould/number conversion and stores processor module, digital signal processing module, demonstration and control module and power module,
Mould/number conversion and stores processor module are sampled, quantize, are encoded the intermediate-freuqncy signal of intermediate frequency signal processing module output, and intermediate-freuqncy signal is transformed into digital intermediate frequency signal and stores, and digital intermediate frequency signal are exported to digital signal processing module simultaneously;
Digital signal processing module, according to acquired original data, converts the digital intermediate frequency signal of each passage output to radiation temperature value according to calibration equation, and finally converts gradation of image data to, and gradation of image data are sent to and shown and control module;
Show with control module and be used for display gray shade value image, and control antenna servo module, the mechanical scanning of implementation space wave beam;
Power module is for to antenna servo module, Terahertz local oscillator frequency multiplier, local oscillator reference source, intermediate-freuqncy signal processing module, mould/number conversion and stores processor module, and demonstration and control module provide electric current or voltage.
8. the Terahertz passive type color camera as described in arbitrary claim of claim 1-7, it is characterized in that: the quasi-optical frequency mixer of Terahertz multi-beam and intermediate-freuqncy signal processing module adopt LTCC packaging technology integrated, realize integrated three-dimensional three-dimensional encapsulation, wherein the double conversion module of intermediate-freuqncy signal processing module be embedded in the lower surface cavity of the encapsulation based on LTCC or Surface Mount on LTCC lower surface substrate, the mixing antenna chip of the quasi-optical frequency mixer of Terahertz multi-beam is positioned at ltcc substrate top.
9. the Terahertz passive type color camera as described in arbitrary claim of claim 1-8, is characterized in that: W=3, and to get target emanation and go out three frequencies in terahertz signal, described one point of W road power divider is one point of No. 3 power divider.
10. Terahertz passive type color camera as claimed in claim 9, is characterized in that: described three frequencies are taken as 220.5GHz, 340.2GHz, 450.1GHz, and Terahertz local oscillation signal frequency is 100GHz; For 220.5GHz, utilize 2 mixing, output 20.5GHz signal; For 340.2GHz, utilize 3 mixing, output 40.2GHz signal; For 450.1GHz, utilize 4 mixing, output 50.1GHz signal;
Each pixel mixer output signal of quasi-optical Terahertz multi-beam frequency mixer output is divided into 3 road signals by described one point of No. 3 power divider, described 3 road signals comprise first via signal, the second road signal, Third Road signal, filter comprises the first filter, the second filter, the 3rd filter, first via signal is by the first filter, the first filter output 20.5GHz signal, the second road signal is by the second filter, the second filter output 40.2GHz signal, Third Road signal is by the 3rd filter, the 3rd filter output 50.1GHz signal, for 20.5GHz signal, 40.2GHz signal, 50.1GHz signal, carry out secondary mixing through secondary mixing device respectively again, output 500MHz, 200MHz, the intermediate-freuqncy signal of 100MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310073017.5A CN104038706B (en) | 2013-03-07 | 2013-03-07 | A kind of Terahertz passive type colour focal plane camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310073017.5A CN104038706B (en) | 2013-03-07 | 2013-03-07 | A kind of Terahertz passive type colour focal plane camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104038706A true CN104038706A (en) | 2014-09-10 |
| CN104038706B CN104038706B (en) | 2017-05-31 |
Family
ID=51469280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310073017.5A Expired - Fee Related CN104038706B (en) | 2013-03-07 | 2013-03-07 | A kind of Terahertz passive type colour focal plane camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104038706B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158196A (en) * | 2015-05-12 | 2015-12-16 | 上海理工大学 | Terahertz wave 3D image acquisition method and system |
| CN108398691A (en) * | 2018-05-25 | 2018-08-14 | 中国工程物理研究院流体物理研究所 | A kind of difference frequency signal generation device and method |
| CN108760673A (en) * | 2018-04-13 | 2018-11-06 | 清华大学 | The device and method of high-risk chemical detection based on Terahertz |
| CN109031449A (en) * | 2018-10-29 | 2018-12-18 | 苏州耶拿微电子有限公司 | Using the passive superconduction Terahertz human body safety check instrument of WR10 waveguide |
| CN109655841A (en) * | 2018-12-13 | 2019-04-19 | 北京遥测技术研究所 | Terahertz multimode Real Time Image System |
| CN109787562A (en) * | 2019-01-10 | 2019-05-21 | 青岛海洋科学与技术国家实验室发展中心 | Ultra wide band millimeter wave frequency-variable module and component |
| CN109856695A (en) * | 2019-02-26 | 2019-06-07 | 北京遥测技术研究所 | The big visual field multi-channel terahertz array detection imaging system of small size |
| CN110411977A (en) * | 2019-08-05 | 2019-11-05 | 中电科仪器仪表有限公司 | A kind of all-electronin terahertz tomographic imaging device and its control method |
| US10571393B2 (en) | 2018-04-13 | 2020-02-25 | Tsinghua University | Terahertz gas detection method and device based on Gregory double reflection antenna |
| CN114216853A (en) * | 2021-12-13 | 2022-03-22 | 清华大学 | Real-time detection system and method based on terahertz leaky-wave antenna |
| CN115712126A (en) * | 2023-01-09 | 2023-02-24 | 北京理工大学 | Terahertz frequency modulation continuous wave quasi-optical array three-dimensional imaging system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6559447B2 (en) * | 2000-12-26 | 2003-05-06 | Honeywell International Inc. | Lightweight infrared camera |
| CN1880950A (en) * | 2005-06-06 | 2006-12-20 | 前视红外系统股份公司 | Infrared camera |
| JP2007503622A (en) * | 2003-08-26 | 2007-02-22 | レッドシフト システムズ コーポレイション | Infrared camera system |
| US20090050806A1 (en) * | 2004-12-03 | 2009-02-26 | Fluke Corporation | Visible light and ir combined image camera with a laser pointer |
| CN201616858U (en) * | 2010-03-30 | 2010-10-27 | 天津三星光电子有限公司 | Video camera with functions of temperature recognizing, automatic photographing and video recording |
-
2013
- 2013-03-07 CN CN201310073017.5A patent/CN104038706B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6559447B2 (en) * | 2000-12-26 | 2003-05-06 | Honeywell International Inc. | Lightweight infrared camera |
| JP2007503622A (en) * | 2003-08-26 | 2007-02-22 | レッドシフト システムズ コーポレイション | Infrared camera system |
| US20090050806A1 (en) * | 2004-12-03 | 2009-02-26 | Fluke Corporation | Visible light and ir combined image camera with a laser pointer |
| CN1880950A (en) * | 2005-06-06 | 2006-12-20 | 前视红外系统股份公司 | Infrared camera |
| CN201616858U (en) * | 2010-03-30 | 2010-10-27 | 天津三星光电子有限公司 | Video camera with functions of temperature recognizing, automatic photographing and video recording |
Non-Patent Citations (2)
| Title |
|---|
| JIN-CHAO MOU ET AL: "Millimeter-wave balanced mixer based on a novel wide-band Schottky diode model", 《J.INFRARED MILLIM. WAVES》 * |
| MOU JIN-CHAO ET AL.: "Schottky diodes with the cutoff frequency of 2.6 THz and its applications in focal imaging array", 《MICROWAVE AND MILLIMETER WAVE TECHNOLOGY 2012 INTERNATIONAL CONFERENCE(ICMMT)》 * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158196A (en) * | 2015-05-12 | 2015-12-16 | 上海理工大学 | Terahertz wave 3D image acquisition method and system |
| CN105158196B (en) * | 2015-05-12 | 2017-09-29 | 上海理工大学 | A kind of THz wave 3D rendering acquisition methods and system |
| US10571393B2 (en) | 2018-04-13 | 2020-02-25 | Tsinghua University | Terahertz gas detection method and device based on Gregory double reflection antenna |
| CN108760673A (en) * | 2018-04-13 | 2018-11-06 | 清华大学 | The device and method of high-risk chemical detection based on Terahertz |
| CN108398691A (en) * | 2018-05-25 | 2018-08-14 | 中国工程物理研究院流体物理研究所 | A kind of difference frequency signal generation device and method |
| CN108398691B (en) * | 2018-05-25 | 2023-10-17 | 中国工程物理研究院流体物理研究所 | Difference frequency signal generating device and method |
| CN109031449A (en) * | 2018-10-29 | 2018-12-18 | 苏州耶拿微电子有限公司 | Using the passive superconduction Terahertz human body safety check instrument of WR10 waveguide |
| CN109655841A (en) * | 2018-12-13 | 2019-04-19 | 北京遥测技术研究所 | Terahertz multimode Real Time Image System |
| CN109787562A (en) * | 2019-01-10 | 2019-05-21 | 青岛海洋科学与技术国家实验室发展中心 | Ultra wide band millimeter wave frequency-variable module and component |
| CN109856695A (en) * | 2019-02-26 | 2019-06-07 | 北京遥测技术研究所 | The big visual field multi-channel terahertz array detection imaging system of small size |
| CN110411977A (en) * | 2019-08-05 | 2019-11-05 | 中电科仪器仪表有限公司 | A kind of all-electronin terahertz tomographic imaging device and its control method |
| CN110411977B (en) * | 2019-08-05 | 2021-10-08 | 中电科思仪科技股份有限公司 | Full-electronic terahertz tomography device and control method thereof |
| CN114216853A (en) * | 2021-12-13 | 2022-03-22 | 清华大学 | Real-time detection system and method based on terahertz leaky-wave antenna |
| CN114216853B (en) * | 2021-12-13 | 2023-12-29 | 清华大学 | Real-time detection system and method based on terahertz leaky-wave antenna |
| CN115712126A (en) * | 2023-01-09 | 2023-02-24 | 北京理工大学 | Terahertz frequency modulation continuous wave quasi-optical array three-dimensional imaging system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104038706B (en) | 2017-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104038706A (en) | Terahertz passive type color focal plane-based camera | |
| CN104048761A (en) | Terahertz semi-active color focal plane camera | |
| US11605901B2 (en) | Beam reconstruction method, antenna, and microwave device | |
| US10340602B2 (en) | Retro-directive quasi-optical system | |
| CN102255119B (en) | Projected artificial magnetic mirror | |
| US20070139248A1 (en) | System and method for standoff microwave imaging | |
| CN104038707A (en) | Portable terahertz passive type color camera | |
| CN108627827A (en) | Realize the device and detection method of millimetre-wave radar wide area long-range target acquisition | |
| CN110247153A (en) | Reflector antenna device | |
| CN105824021A (en) | Analog and digital hybrid two-dimensional phased array radio frequency multiple-beam intelligent imaging system | |
| GB2491432A (en) | Hybrid millimeter wave imaging system | |
| CN109655841A (en) | Terahertz multimode Real Time Image System | |
| CN107275803A (en) | A kind of millimeter wave reflection from lens formula intelligent antenna equipment | |
| US20130113657A1 (en) | Systems and methods to increase the number of simultaneous pixels in a wireless imaging system | |
| CN113064173A (en) | Spherical dual-polarization phased array weather radar | |
| Landsberg et al. | Design and measurements of 100 GHz reflectarray and transmitarray active antenna cells | |
| Zhu et al. | A 430GHz CMOS Concurrent Transceiver Pixel Array for High Angular Resolution Reflection-Mode Active Imaging | |
| Manzillo et al. | A 28 dBm-EIRP low-profile D-band transmitting module with a folded transmitarray antenna | |
| García-Pino et al. | Bifocal reflector antenna system for radar imaging at 300 GHz | |
| Yang et al. | Reconfigurable reflectarrays and transmitarrays: From antenna designs to system applications | |
| CN112763514A (en) | Receiving and transmitting antenna module and system of millimeter wave real-time imaging personnel security check system | |
| Radzikhovsky et al. | 16-channel millimeter-wave radiometric imaging system | |
| US11575429B1 (en) | Multi-beam and multi-polarization electromagnetic wavefront shaping | |
| CN104052936A (en) | Portable terahertz semi-active color camera | |
| Choi et al. | Perspective on active submillimeter electromagnetic wave imaging using CMOS integrated circuits technologies |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170531 Termination date: 20200307 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |