CN107171746A - A kind of Terahertz frequency range noise temperature measures calibration system - Google Patents
A kind of Terahertz frequency range noise temperature measures calibration system Download PDFInfo
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- CN107171746A CN107171746A CN201710551279.6A CN201710551279A CN107171746A CN 107171746 A CN107171746 A CN 107171746A CN 201710551279 A CN201710551279 A CN 201710551279A CN 107171746 A CN107171746 A CN 107171746A
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- black matrix
- receiver
- measured
- temperature
- terahertz
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radiation Pyrometers (AREA)
Abstract
Calibration system, including Terahertz black matrix, turntable, receiver to be measured, power detection module and control centre are measured the invention discloses a kind of Terahertz frequency range noise temperature；Terahertz black matrix includes the first black matrix and the second black matrix, and the first black matrix and the second black matrix are arranged on turntable, and is provided with isolation baffle plate therebetween；Control centre controls the temperature of Terahertz black matrix, and control centre's control turntable is relatively moved with receiver to be measured so that the first black matrix and the second black matrix are respectively facing receiver to be measured, and obtain power signal by receiver to be measured；Power detection module obtains the power signal that receiver to be measured is sent, and passes to control centre, and control centre measures calibration according to power signal to receiver to be measured.The measurement calibration system can carry out accurately measurement to Terahertz receiver and calibrate, and the calibration system has wider frequency coverage, and favorable repeatability, measurement accuracy is high.
Description
Technical field
The present invention relates to radio communication technology field, in particular it relates to which a kind of Terahertz frequency range receiver is low and work(
The noise temperature measurement calibration system of energy device such as noise amplifier, frequency mixer.
Background technology
With the continuous exploration to electromagnetic spectrum, the mankind obtain sufficient understanding to electronics and optics, and pass through
To electronics and optical research, various devices are have developed, the two big more research of maturation and application technologies are formd.One is
Microwave and millimeter wave technology, another is optical technology.
Microwave and millimeter wave technology is widely used in fields such as radar, radio astronomy, communication, imaging, navigation；Light
The application of technology has penetrated into the every aspect of people's daily life.But between millimeter wave and optical frequencies, also exist rich
The rich frequency spectrum resource not being fully developed, that is, Terahertz frequency range.With the development of Terahertz Technology, Terahertz biology should
All start to move towards into, medical application, imaging applications, atmospheric science, environmental science, the communication technology and safety detection etc. basin
Ripe, Terahertz receiver system is wherein indispensable important component.
The major function of Terahertz receiver is that the weak radio-frequency signal reflected by target for receiving antenna is entered
The processing such as row amplification, pre-selection, frequency conversion, filtering, the weak radio-frequency signal for making objective emission return becomes the video letter of enough amplitudes
Number or data signal, the need for meeting digital processing.Echo-signal dynamic range is big, and receiver should all be protected in whole work
The original amplitude of echo-signal and phase information are held, this requires that receiver sensitivity is high, noise coefficient is low, high gain.
Sensitivity represents the ability that receiver receives small-signal, and the sensitivity of receiver is higher, the letter that can be received
It is number weaker.The size of sensitivity is mainly again depending on the internal noise performance of receiver.Generally connect with noise temperature to weigh
The internal noise performance of receipts machine.
The test and calibration of receiver noise temperature can be automatically performed currently without set of system instrument.This field mesh
It is preceding only to support below frequency 140GHz receiver noise temperature test, and provide some manual test sides in different frequency range
Case.Lack the technology hand effectively with authority always to Terahertz receiver and the progress calibration calibration of related device noise temperature at present
Section, the accuracy and repeatability of test are also always the problem of noise temperature test.
Therefore, a kind of repeatable and high test mode of accuracy how is designed, is that those skilled in the art are badly in need of solution
Technical problem.
The content of the invention
Calibration system, the measurement calibration system energy are measured it is an object of the invention to provide a kind of Terahertz frequency range noise temperature
It is enough that accurately measurement calibration is carried out to Terahertz receiver.
In order to realize above-mentioned technical purpose, calibration system is measured the invention provides a kind of Terahertz frequency range noise temperature,
Including Terahertz black matrix, turntable, receiver to be measured, power detection module and control centre；The Terahertz black matrix includes first
Black matrix and the second black matrix, first black matrix and second black matrix are arranged on the turntable, and therebetween be provided with every
From baffle plate；The control centre controls the temperature of the Terahertz black matrix, and the control centre controls the turntable to be treated with described
Survey receiver relative movement so that first black matrix and second black matrix are respectively facing receiver to be measured, and are treated by described
Survey receiver and obtain power signal；The power detection module obtains the power signal that the receiver to be measured is sent, and transmits
To the control centre, the control centre measures calibration according to the power signal to the receiver to be measured.
Optionally, the turntable includes motor, controller, support platform and supporting plate, and the support platform is arranged on institute
The output end of motor is stated, it is flat that first black matrix and second black matrix are fixed on the support by two supporting plates respectively
On platform；The control centre controls the motor by the controller, and the motor drives the turntable to rotate or mobile.
Optionally, the support platform is circular platform or square platform.
Optionally, the receiver to be measured is set by moving assembly, and the control centre controls the moving assembly to move
It is dynamic so that receiver to be measured is relative with first black matrix and second black matrix respectively.
Optionally, the black matrix that the Terahertz black matrix is made for absorbing material, the temperature controllable precise of the absorbing material,
And the absorbing material possesses extremely low reflectivity in Terahertz frequency range.
Optionally, first black matrix and second black matrix are respectively high temperature blackbody and normal temperature black matrix, or are high temperature
Black matrix and low temperature black matrix, or be normal temperature black matrix and low temperature black matrix.
Optionally, the control centre includes turning table control module, temperature control modules and data processing module；Described turn
Platform control module controls the rotation of the turntable；The temperature control modules control the high temperature blackbody or the low temperature black matrix
Temperature；The data processing module is handled according to the power data to the power signal and the Terahertz black matrix, right
The receiver to be measured is measured and calibrated.
Optionally, the data processing module uses Y to carry out processing calculating to data because of value-based algorithm.
Terahertz frequency range noise temperature that the present invention is provided measurement calibration system, including Terahertz black matrix, turntable, to be measured connect
Receipts machine, power detection module and control centre；Terahertz black matrix includes the first black matrix and the second black matrix, the first black matrix and second black
Body is arranged on turntable, and is provided with isolation baffle plate therebetween；Control centre controls the temperature of Terahertz black matrix, control centre
Turntable is controlled to be relatively moved with receiver to be measured so that the first black matrix and the second black matrix are respectively facing receiver to be measured, and by treating
Survey receiver and obtain power signal；Power detection module obtains the power signal that receiver to be measured is sent, and passes in control
The heart, control centre measures calibration according to power signal to receiver to be measured.
Terahertz black matrix is accurate standard blackbody, results in accurate blackbody temperature, the calibration system make use of too
This feature of hertz black matrix is calibrated to Terahertz receiver, during use, is respectively facing two Terahertz black matrixes
Receiver to be measured, receiver to be measured obtains the temperature signal of two Terahertz black matrixes respectively, and receiver to be measured obtains temperature signal
Afterwards, certain power signal is sent, the power signal that power detection module acquisition receiver to be measured is sent simultaneously is passed in control
The heart, control centre is handled power signal, it becomes possible to which the noise temperature for calculating receiver to be measured can be according to testing result
Terahertz receiver is calibrated.The calibration system has wider frequency coverage, favorable repeatability, measurement accuracy
It is high.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute a part for specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.
Fig. 1 is the schematic diagram that Terahertz frequency range noise temperature provided by the present invention measures calibration system；
Fig. 2 is a kind of specific embodiment party of turntable that Terahertz frequency range noise temperature provided by the present invention measures calibration system
The structural representation of formula；
Wherein, the corresponding relation between the reference and component names in Fig. 1 and Fig. 2 is as follows：
First black matrix 1；Second black matrix 2；Isolation baffle plate 3；Support platform 4；Supporting plate 5.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
Fig. 1 is refer to, Fig. 1 is turntable one kind that Terahertz frequency range noise temperature provided by the present invention measures calibration system
The structural representation of embodiment.
In a kind of specific embodiment, calibration system is measured the invention provides a kind of Terahertz frequency range noise temperature,
Including Terahertz black matrix, turntable, receiver to be measured, power detection module and control centre；The Terahertz black matrix includes first
The black matrix 2 of black matrix 1 and second, first black matrix 1 and second black matrix 2 are arranged on the turntable, and are set therebetween
There is isolation baffle plate 3；Control centre controls the temperature of Terahertz black matrix, and control centre's control turntable is relative with receiver to be measured to be moved
It is dynamic so that the first black matrix 1 and the second black matrix 2 are respectively facing receiver to be measured, and obtain power signal by receiver to be measured；Power
Detection module obtains the power signal that receiver to be measured is sent, and passes to control centre, control centre according to blackbody temperature and
The result of calculations such as power signal measure calibration to receiver to be measured.
Terahertz black matrix is accurate standard blackbody, results in accurate blackbody temperature, the calibration system make use of too
This feature of hertz black matrix is calibrated to Terahertz receiver.On the turntable, the first black matrix 1 and the second black matrix 2 by
Isolation baffle plate 3 is separated, it is to avoid temperature therebetween influences each other, and the first black matrix 1 is different with both the second black matrixes 2 temperature.Such as
Fruit is normal temperature black matrix, then the temperature of black matrix remains constant；If high temperature blackbody or low temperature black matrix, then the temperature of black matrix can
Adjust, and by control centre's control, wherein, the maximum temperature of high temperature blackbody is no more than 90 degrees Celsius.
During use, turntable and receiver to be measured are relatively moved, and can be that turntable is moved, receiver it is motionless or
Turntable is motionless, receiver movement so that when the first black matrix 1 is towards receiver to be measured, and receiver to be checked obtains the temperature of the first black matrix 1
Signal is spent, now receiver to be measured sends certain power signal, power detection module obtains the power that receiver to be measured is sent
Signal simultaneously passes to control centre, and control centre is handled power signal, determine receiver to be measured testing result whether
Accurately；
Then, control centre's control turntable and receiver to be measured are relatively moved so that the second black matrix 2 is towards receiver to be measured
When, receiver to be measured obtains the temperature signal of the second black matrix 2, and sends certain power signal, and power detection module is obtained and treated
Survey the power signal that sends of receiver and pass to control centre, control centre is handled power signal, determines to be measured connect
The testing result of receipts machine；And receiver to be measured is calibrated according to testing result.
The calibration system can also carry out noise to receiver system to function elements such as noise amplifier, frequency mixers
Temperature survey is calibrated.The calibration system has wider frequency coverage, and frequency coverage can reach 80-1000GHz,
Terahertz black matrix is standard body black matrix, and the calibration system is reusable, reproducible, and measurement accuracy is high.
In further specific embodiment, the turntable includes motor, controller, support platform 4 and supporting plate 5, institute
The output end that support platform 4 is arranged on the motor is stated, first black matrix 1 and second black matrix are respectively by two branch
Fagging 5 is fixed in the support platform 4；The control centre controls the motor by the controller, and motor, which drives, to be turned
Platform is rotated or mobile.
Motor control support platform 4 is rotated or mobile, and the first black matrix 1 and the second black matrix 2 are arranged in support platform 4,
Support platform 4 changes the position of the first black matrix 1 and the second black matrix 2 when rotating, the two is respectively facing receiver to be measured with this.Control
Make centrally through controller controlled motor, and then the rotation or movement of indirect control support platform 4.
Specifically, support platform can be circular platform, or square platform, or it is the platform of other results.
In another specific embodiment, receiver to be measured is set by moving assembly, the mobile group of control centre's control
Part is moved so that receiver to be measured is relative with the first black matrix 1 and the second black matrix 2 respectively.In this embodiment, pass through moving assembly
Mobile receiver to be measured, turntable is remained stationary as, and the frequency signal of the first black matrix 1 and the second black matrix 2 can also be obtained respectively.
It is a kind of preferred embodiment in, the Terahertz black matrix is the black matrix that is made of absorbing material, the absorbing material
Temperature controllable precise, and absorbing material possesses extremely low reflectivity in Terahertz frequency range.
Terahertz black matrix is the suction ripple material for possessing ultra-low reflectance on the black matrix that absorbing material is made, selection Terahertz frequency band
Material, while requiring that absorbing material possesses the temperature of uniform and controllable precise.By the material build the control of accurate blackbody temperature and
Measuring system, requires that black matrix keeps ultra-low reflectance while blackbody temperature is changed.
In a particular embodiment, the first black matrix 1 and the second black matrix 2 respectively high temperature blackbody and normal temperature black matrix, or
For high temperature blackbody and low temperature black matrix, or it is normal temperature black matrix and low temperature black matrix.
The temperature of normal temperature black matrix keeps constant, and the temperature of high temperature blackbody and low temperature black matrix is variable, high temperature blackbody and low
The temperature of warm black matrix is by control centre's control.
In above-mentioned each specific embodiment, control centre is included at turning table control module, temperature control modules and data
Manage module；Turning table control module controls the rotation of the turntable；Temperature control modules control the temperature of high temperature blackbody or low temperature black matrix
Degree；Data processing module is handled according to the power data to power signal and Terahertz black matrix, and receiver to be measured is carried out
Measurement and calibration.
In further specific embodiment, data processing module is using Y because value-based algorithm carries out processing calculating to data.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, but the invention is not limited in this.For those skilled in the art, the essence of the present invention is not being departed from
In the case of refreshing and essence, various changes and modifications can be made therein, and these variations and modifications are also considered as protection scope of the present invention.
Claims (8)
1. a kind of Terahertz frequency range noise temperature measures calibration system, it is characterised in that including Terahertz black matrix, turntable, to be measured
Receiver, power detection module and control centre；The Terahertz black matrix includes the first black matrix and the second black matrix, and described first is black
Body and second black matrix are arranged on the turntable, and are provided with isolation baffle plate therebetween；The control centre controls institute
The temperature of Terahertz black matrix is stated, the control centre controls the turntable to be relatively moved with the receiver to be measured so that described
First black matrix and second black matrix are respectively facing receiver to be measured, and obtain power signal by the receiver to be measured；It is described
Power detection module obtains the power signal that the receiver to be measured is sent, and passes to the control centre, in the control
The heart measures calibration according to the power signal to the receiver to be measured.
2. Terahertz frequency range noise temperature as claimed in claim 1 measures calibration system, it is characterised in that the turntable includes
Motor, controller, support platform and supporting plate, the support platform are arranged on the output end of the motor, first black matrix
It is fixed on respectively by two supporting plates in the support platform with second black matrix；The control centre passes through the control
Device processed controls the motor, and the motor drives the turntable to rotate or mobile.
3. Terahertz frequency range noise temperature as claimed in claim 2 measures calibration system, it is characterised in that the support platform
For circular platform or square platform.
4. Terahertz frequency range noise temperature as claimed in claim 1 measures calibration system, it is characterised in that the reception to be measured
Machine is set by moving assembly, and the control centre controls the moving assembly movement so that receiver to be measured respectively with it is described
First black matrix and second black matrix are relative.
5. Terahertz frequency range noise temperature as claimed in claim 1 measures calibration system, it is characterised in that the Terahertz is black
The black matrix that body is made for absorbing material, the temperature controllable precise of the absorbing material, and the absorbing material is in Terahertz frequency range
Possesses extremely low reflectivity.
6. the Terahertz frequency range noise temperature measurement calibration system as described in any one of claim 1 to 5, it is characterised in that institute
State the first black matrix and second black matrix is respectively high temperature blackbody and normal temperature black matrix, or be high temperature blackbody and low temperature black matrix, or
Person is normal temperature black matrix and low temperature black matrix.
7. Terahertz frequency range noise temperature as claimed in claim 6 measures calibration system, it is characterised in that the control centre
Including turning table control module, temperature control modules and data processing module；The turning table control module controls turning for the turntable
It is dynamic；The temperature control modules control the temperature of the high temperature blackbody or the low temperature black matrix；The data processing module according to
The power data of the power signal and the Terahertz black matrix is handled, the receiver to be measured is measured and school
It is accurate.
8. Terahertz frequency range noise temperature as claimed in claim 7 measures calibration system, it is characterised in that the data processing
Module is using Y because value-based algorithm carries out processing calculating to data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710551279.6A CN107171746B (en) | 2017-07-07 | 2017-07-07 | Terahertz frequency band noise temperature measurement calibration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710551279.6A CN107171746B (en) | 2017-07-07 | 2017-07-07 | Terahertz frequency band noise temperature measurement calibration system |
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| CN107171746A true CN107171746A (en) | 2017-09-15 |
| CN107171746B CN107171746B (en) | 2023-08-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105187136A (en) * | 2015-09-09 | 2015-12-23 | 中国工程物理研究院电子工程研究所 | Terahertz receiver noise temperature test system and method |
| JP2016170102A (en) * | 2015-03-13 | 2016-09-23 | 日本信号株式会社 | Control circuit and detector |
| CN106813779A (en) * | 2016-12-25 | 2017-06-09 | 中国科学院紫金山天文台 | A kind of full-automatic Terahertz atmospheric characteristic measuring system and its calibration method |
| CN206865465U (en) * | 2017-07-07 | 2018-01-09 | 深圳翠博微***有限公司 | A kind of Terahertz frequency range noise temperature measures calibration system |
-
2017
- 2017-07-07 CN CN201710551279.6A patent/CN107171746B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016170102A (en) * | 2015-03-13 | 2016-09-23 | 日本信号株式会社 | Control circuit and detector |
| CN105187136A (en) * | 2015-09-09 | 2015-12-23 | 中国工程物理研究院电子工程研究所 | Terahertz receiver noise temperature test system and method |
| CN106813779A (en) * | 2016-12-25 | 2017-06-09 | 中国科学院紫金山天文台 | A kind of full-automatic Terahertz atmospheric characteristic measuring system and its calibration method |
| CN206865465U (en) * | 2017-07-07 | 2018-01-09 | 深圳翠博微***有限公司 | A kind of Terahertz frequency range noise temperature measures calibration system |
Non-Patent Citations (1)
| Title |
|---|
| 李宏光等: "黑体的太赫兹辐射特性与测试方法", 《激光与光电子学进展》 * |
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