CN108828327A - Spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system and method - Google Patents
Spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system and method Download PDFInfo
- Publication number
- CN108828327A CN108828327A CN201810386078.XA CN201810386078A CN108828327A CN 108828327 A CN108828327 A CN 108828327A CN 201810386078 A CN201810386078 A CN 201810386078A CN 108828327 A CN108828327 A CN 108828327A
- Authority
- CN
- China
- Prior art keywords
- calibration
- microwave radiometer
- noise source
- source network
- radiometer
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
- G01R29/0857—Dosimetry, i.e. measuring the time integral of radiation intensity; Level warning devices for personal safety use
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radiation Pyrometers (AREA)
Abstract
The present invention provides a kind of spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system and method, scaling system structure of the invention is simple, is easily achieved.Pass through external calibration source network real-time calibration scaling radiometer, the output of scaling radiometer receiver real-time testing noise source network, can in real time effectively and the accurately output of test noise source network, it can reduce to noise source stability and each passage consistency requirement of power division network, reduce difficulty in engineering realization.Using distribution calibration mode, all kinds of errors of successive elimination are conducive to gradually assess all kinds of error correction effects, to adjust hardware scheme, while targetedly convenient for debugging test.
Description
Technical field
The present invention relates to a kind of spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system and methods.
Background technique
The characteristics of microwave radiometer is interfered with not climate condition, is not necessarily to illumination, has round-the-clock, round-the-clock work
Ability, or even earth's surface and the vegetation of certain depth can be penetrated, the attention of spacefaring nation is received, meteorological, sea is widely used in
Ocean, land resources, environment, astronomical observation and deep-space detection field.
To realize satellite-borne microwave radiometer high spatial resolution, large aperture antenna is needed, the increase of antenna aperture is to processing
Difficulty is brought with mechanical scanning, aperture synthesis radiation detection can be to avoid this difficulty, but system structure is complicated, and cannot achieve
Multiband integrally detects.And the system for using one-dimensional real aperture to mix with one-dimensional aperture synthesis can preferably compromise, therefore be
The research emphasis and hot spot of current New System microwave sounding.
Aperture synthesis technology is built upon on the basis of more array element collaboration modes, compared with traditional real aperture technique, is needed
Additionally to consider many factors such as consistency and mutual coupling, the sample-synchronous between channel, antenna, significantly increase in its correction
Difficulty and complexity.The non-ideal characteristic of synthetic aperture microwave radiometer system hardware can also introduce systematic error, cause defeated
Bright temperature image quality declines out, and image is made to generate serious distortion, even completely lose image outline feature.Aperture synthesis is fixed at present
It marks thinking and teaches rich in 1996 referring especially to the Camps of Spain Polytechnic University of Catalonia
Scholar's paper, it is different according to the source that system hardware constitutes imperfection, systematic error has been divided into antenna error, receiver leads to
Three road error, lubber line error major class, are corrected respectively for the imperfection of each section hardware, for it is actual application with
It is and too complicated for error correction, it is difficult to correct all systematic errors.
Summary of the invention
The purpose of the present invention is to provide a kind of spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system and sides
Method can correct due to array structure and hardware non-ideal characteristic bring systematic error comprehensively, step by step, solve existing correction skill
The deficiency of art.
To solve the above problems, the present invention provides a kind of spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer calibration system
System, including：
Coherent noise source network, for connecting tested radiometer system, and constant power exports stable coherent noise signal
To the tested radiometer system；
Calibration microwave radiometer receiver network, for connecting the coherent noise source network, and phase described in real-time measurement
Dry noise signal；
Noncoherent noise source network for connecting tested radiometer system, and exports stable noncoherent noise signal extremely
The tested radiometer system；
Internal calibration switch, for connecting the coherent noise source network and noncoherent noise source network, and switches the phase
Dry noise signal and the input of noncoherent noise signal.
Further, in above system, the tested radiometer system is one-dimensional synthesis aperture microwave radiometer system,
The tested radiometer system is made of microwave radiometer receiver linear array.
Further, in above system, the coherent noise source network includes that noise source, function divide phase-shift network, described
Function divides phase-shift network to connect the noise source.
Further, in above system, the function divides phase-shift network to include power-devided circuit and phase-shift circuit.
Further, in above system, the calibration microwave radiometer receiver network includes：
External calibration source network, external calibration switch and the calibration microwave radiometer receiver, wherein the external calibration switch
The external calibration source network and the coherent noise source network are connected, the calibration microwave radiometer receiver connection is described outer fixed
Mark switch.
Further, in above system, the external calibration source network includes：Cold sky source, hot calibration load.
Further, in above system, the external calibration switch is single-pole three-throw switch.
Further, in above system, the noncoherent noise source network is by several relatively independent matched loads
It constitutes.
Further, in above system, the internal calibration switch is single-pole three-throw switch.
Another side according to the present invention provides a kind of spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer calibrating method,
Using above system, the method includes：
Step 1：Coherent noise source network switchs input coherent noise signal to tested Synthetic Aperture Microwave by internal calibration
Radiometer system, to correct aperture synthesis system the multiplying property phase error factor；
Step 2：It is fixed that external calibration source network in calibration microwave radiometer receiver network is accessed by external calibration switch 80
It marks in microwave radiometer receiver, to be demarcated to calibration microwave radiometer receiver；
Step 3：Calibration microwave radiometer receiver by external calibration switch access coherent noise source network to noise source into
Row test, to correct aperture synthesis system the multiplying property range error factor.
Step 4：Noncoherent noise source network is input in tested microwave radiation meter systems by internal calibration switch, to
Correct the additive errors factor.
Further, in the above-mentioned methods, the multiplying property error factor includes the multiplying property range error factor and multiplying property phase
Error factor.
Further, in the above-mentioned methods, the calibration microwave radiometer receiver passes through described in external calibration switch access
Coherent noise source network is exported to coherent noise source network described in real-time testing, including：
Using the calibration microwave radiometer receiver real-time measurement coherent noise source network.
Compared with prior art, scaling system structure of the invention is simple, is easily achieved.It is real-time by external calibration source network
Scaling radiometer is demarcated, the output of scaling radiometer receiver real-time testing noise source network effectively can be surveyed accurately in real time
The output for trying noise source network can reduce to noise source stability and each passage consistency requirement of power division network, reduce work
Cheng Shixian difficulty.Using distribution calibration mode, all kinds of errors of successive elimination are conducive to gradually assess all kinds of error correction effects,
To targetedly adjust hardware scheme, while convenient for debugging test.
Detailed description of the invention
Fig. 1 is the structure of the spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system of one embodiment of the invention
Figure.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
As shown in Figure 1, the present invention provides a kind of spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system, packet
It includes：
Coherent noise source network 10, for connecting tested radiometer system 50, and constant power exports stable coherent noise
Signal is to the tested radiometer system 50；
Calibration microwave radiometer receiver network 20, for connecting the coherent noise source network 30, and real-time measurement institute
State coherent noise signal；
Noncoherent noise source network 30 for connecting tested radiometer system 50, and exports stable noncoherent noise letter
Number to the tested radiometer system 50；
Internal calibration switch 40 for connecting the coherent noise source network 10 and noncoherent noise source network 30, and switches
The coherent noise signal and the input of noncoherent noise signal.
Here, it is directed to various types of one-dimensional synthesis aperture microwave radiometer error, from application of engineering project,
It studies comprehensive and accurate error correcting system and method is of great significance.
Scaling system structure of the invention is simple, is easily achieved.By external calibration source network real-time calibration scaling radiometer,
The output of scaling radiometer receiver real-time testing noise source network, can be effective and accurately test noise source network in real time defeated
Out, it can reduce to noise source stability and each passage consistency requirement of power division network, reduce difficulty in engineering realization.
In one-dimensional one embodiment of Synthetic Aperture Microwave Calibration of Microwave Radiometer system of spaceborne multiple step format of the invention, the quilt
Pyranometer system is one-dimensional synthesis aperture microwave radiometer system, and the tested radiometer system is by microwave radiometer receiver
Linear array is constituted.
As shown in Figure 1, spaceborne multiple step format one-dimensional Synthetic Aperture Microwave Calibration of Microwave Radiometer system unified implementation of the invention
In example, the coherent noise source network 10 divides phase-shift network including noise source 100, function, and the function divides described in phase-shift network connection
Noise source 100.
In one-dimensional one embodiment of Synthetic Aperture Microwave Calibration of Microwave Radiometer system of spaceborne multiple step format of the invention, the function
Dividing phase-shift network includes power-devided circuit and phase-shift circuit.
As shown in Figure 1, spaceborne multiple step format one-dimensional Synthetic Aperture Microwave Calibration of Microwave Radiometer system unified implementation of the invention
In example, the calibration microwave radiometer receiver network 20 includes：
External calibration source network 70, external calibration switch 80 and calibration microwave radiometer receiver 90, wherein the external calibration is opened
It closes 80 and connects the external calibration source network 70 and the coherent noise source network 10, the calibration microwave radiometer receiver 90 connects
Connect the external calibration switch 80.
It is described outer in one-dimensional one embodiment of Synthetic Aperture Microwave Calibration of Microwave Radiometer system of spaceborne multiple step format of the invention
Calibrating source network includes：Cold sky source, hot calibration load.
It is described outer in one-dimensional one embodiment of Synthetic Aperture Microwave Calibration of Microwave Radiometer system of spaceborne multiple step format of the invention
Calibration switch is single-pole three-throw switch.
As shown in Figure 1, spaceborne multiple step format one-dimensional Synthetic Aperture Microwave Calibration of Microwave Radiometer system unified implementation of the invention
In example, the noncoherent noise source network 30 is made of several relatively independent matched loads 60.
It is described interior in one-dimensional one embodiment of Synthetic Aperture Microwave Calibration of Microwave Radiometer system of spaceborne multiple step format of the invention
Calibration switch is single-pole three-throw switch.
As shown in Fig. 1, the present invention also provides another spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer calibration sides
Method is calibrated using distribution, including：
Step 1：Coherent noise source network 10 inputs coherent noise signal to tested aperture synthesis by internal calibration switch 40
Microwave radiation meter systems 50, to correct aperture synthesis system the multiplying property phase error factor；
Step 2：External calibration source network 70 in calibration microwave radiometer receiver network 20 is connect by external calibration switch 80
Enter in calibration microwave radiometer receiver 90, to be demarcated to calibration microwave radiometer receiver 90；
Step 3：Calibration microwave radiometer receiver 90 accesses coherent noise source network 10 to making an uproar by external calibration switch 80
Sound source 100 is tested, to correct aperture synthesis system the multiplying property range error factor.
Step 4：Noncoherent noise source network 30 is input to tested microwave radiation meter systems 50 by internal calibration switch 40
In, to correct the additive errors factor, wherein noncoherent noise source network 30 includes multiple matched loads 60.
Here, using distribution calibration mode, all kinds of errors of successive elimination are conducive to gradually assess all kinds of error correction effects
Fruit, to adjust hardware scheme, while targetedly convenient for debugging test.
In spaceborne one embodiment of multiple step format one-dimensional synthesis aperture microwave radiometer calibrating method of the invention, it is described be tested it is comprehensive
The error for closing aperture radiation meter systems is divided into multiplying property error factor and the additive errors factor, wherein the multiplying property error factor packet
Include the multiplying property range error factor and the multiplying property phase error factor.
In spaceborne one embodiment of multiple step format one-dimensional synthesis aperture microwave radiometer calibrating method of the invention, the calibration is micro-
Wave radiation meter receiver accesses the coherent noise source network by external calibration switch, to coherent noise source described in real-time testing
Network output, including：
Using the calibration microwave radiometer receiver real-time measurement coherent noise source network.
Spaceborne one-dimensional multiple step format synthetic aperture radiometer system calibration device and calibrating method provided by the invention, to complete
Face, substep correction solve the deficiency of existing alignment technique due to array structure and hardware non-ideal characteristic bring systematic error,
There is versatility in synthetic aperture radiometer field, scaling system is made of multiple functional modules, mutually indepedent, definite functions；
Mutually indepedent with system under test (SUT), all kinds of errors are demarcated in distribution, are not interfere with each other, convenient for debugging test, easy maintenance, install convenient；
By that can reduce to noise source stability and each passage consistency requirement of power division network to noise source progress the real time measure,
Reduce difficulty in engineering realization.
It is analyzed by calculating, provided scaling system and method, are 7GHz, bandwidth with centre frequency through the invention
600MHz, with 100 channels one-dimensional synthetic aperture radiometer system under test (SUT) for, it is contemplated that following index can be reached：
Calibration precision：≤0.5K；
Weight：≤10kg；
Power consumption：≤10W；
Compared with prior art, the present invention its advantages and beneficial effects is：
1. the scaling system is by multiple module compositions, definite functions and mutual cooperation between modules, modules
Independently of each other, convenient for debugging test.
2, scaling system and tested synthetic aperture radiometer system are mutually indepedent, easy maintenance, install convenient.
3, by external calibration source network real-time calibration scaling radiometer, scaling radiometer real-time testing noise source network is defeated
Out, can effectively and the accurately output of test noise source network, can reduce each to noise source stability and power division network
Passage consistency requirement, reduces difficulty in engineering realization.
4, using distribution calibrating method, different types of systematic error is corrected, is conducive to assess calibration result, have when necessary
Targetedly the Hardware Design scheme is adjusted.
In conclusion can effectively correct aperture synthesis system since hardware is non-the present invention is based on distributed calibrating method
Systematic error caused by desirability and array cooperate.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
Obviously, those skilled in the art can carry out various modification and variations without departing from spirit of the invention to invention
And range.If in this way, these modifications and changes of the present invention belong to the claims in the present invention and its equivalent technologies range it
Interior, then the invention is also intended to include including these modification and variations.
Claims (12)
1. a kind of spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system, which is characterized in that including：
Coherent noise source network, for connecting tested radiometer system, and constant power exports stable coherent noise signal to institute
State tested radiometer system；
Calibration microwave radiometer receiver network for connecting the coherent noise source network, and is concerned with described in real-time measurement and makes an uproar
Acoustical signal；
Noncoherent noise source network for connecting tested radiometer system, and exports stable noncoherent noise signal to described
Tested radiometer system；
Internal calibration switch for connecting the coherent noise source network and noncoherent noise source network, and switches described relevant make an uproar
Acoustical signal and the input of noncoherent noise signal.
2. spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system as described in claim 1, which is characterized in that institute
Stating tested radiometer system is one-dimensional synthesis aperture microwave radiometer system, and the tested radiometer system is connect by microwave radiometer
Receipts machine linear array is constituted.
3. spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system as described in claim 1, which is characterized in that institute
Stating coherent noise source network includes that noise source, function divide phase-shift network, and the function divides phase-shift network to connect the noise source.
4. spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system as claimed in claim 3, which is characterized in that institute
Stating function divides phase-shift network to include power-devided circuit and phase-shift circuit.
5. spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system as described in claim 1, which is characterized in that institute
Stating calibration microwave radiometer receiver network includes：
External calibration source network, external calibration switch and calibration microwave radiometer receiver, wherein described in the external calibration switch connection
External calibration source network and the coherent noise source network, the calibration microwave radiometer receiver connect the external calibration switch.
6. spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system as claimed in claim 5, which is characterized in that institute
Stating external calibration source network includes：Cold sky source, hot calibration load.
7. spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system as claimed in claim 5, which is characterized in that institute
Stating external calibration switch is single-pole three-throw switch.
8. spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system as described in claim 1, which is characterized in that institute
Noncoherent noise source network is stated to be made of several relatively independent matched loads.
9. spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system as described in claim 1, which is characterized in that institute
Stating internal calibration switch is single-pole three-throw switch.
10. a kind of spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer calibrating method, which is characterized in that using such as claim
1~9 described in any item systems, the method includes：
Step 1：Coherent noise source network switchs input coherent noise signal to tested Synthetic Aperture Microwave by internal calibration and radiates
Meter systems, to correct aperture synthesis system the multiplying property phase error factor；
Step 2：External calibration source network in calibration microwave radiometer receiver network is micro- by the access calibration of external calibration switch 80
In wave radiation meter receiver, to be demarcated to calibration microwave radiometer receiver；
Step 3：Calibration microwave radiometer receiver switchs access coherent noise source network by external calibration and surveys to noise source
Examination, to correct aperture synthesis system the multiplying property range error factor.
Step 4：Noncoherent noise source network is input in tested microwave radiation meter systems by internal calibration switch, to correct
The additive errors factor.
11. spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer calibrating method as claimed in claim 10, which is characterized in that
The multiplying property error factor includes the multiplying property range error factor and the multiplying property phase error factor.
12. spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer calibrating method as claimed in claim 10, which is characterized in that
The calibration microwave radiometer receiver accesses the coherent noise source network by external calibration switch, to described in real-time testing
The output of coherent noise source network, including：
Using the calibration microwave radiometer receiver real-time measurement coherent noise source network.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018103078538 | 2018-04-08 | ||
| CN201810307853 | 2018-04-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108828327A true CN108828327A (en) | 2018-11-16 |
| CN108828327B CN108828327B (en) | 2021-04-02 |
Family
ID=64155582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810386078.XA Active CN108828327B (en) | 2018-04-08 | 2018-04-26 | Satellite-borne step-by-step one-dimensional synthetic aperture microwave radiometer calibration system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108828327B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541325A (en) * | 2018-11-27 | 2019-03-29 | 上海航天电子通讯设备研究所 | The spaceborne one-dimensional Synthetic Aperture Microwave radioactivity detection, identificationm, and computation of one kind and measurement method |
| CN109828249A (en) * | 2019-02-22 | 2019-05-31 | 北京遥感设备研究所 | A kind of calibrating method for synthetic aperture radiometer array |
| CN110196401A (en) * | 2019-05-27 | 2019-09-03 | 西安空间无线电技术研究所 | A kind of scaling system and method for aperture synthesis phased array microwave radiometer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032949A (en) * | 2009-09-28 | 2011-04-27 | 中国科学院空间科学与应用研究中心 | External calibration device of geosynchronous orbit atmospheric temperature detecting instrument and external calibration method thereof |
| CN104793061A (en) * | 2015-04-28 | 2015-07-22 | 中国科学院空间科学与应用研究中心 | Spaceborne interferometic microwave radiometer and calibration method thereof |
| CN105738851A (en) * | 2016-02-02 | 2016-07-06 | 华中科技大学 | Synthetic aperture microwave radiometer combined correction method |
-
2018
- 2018-04-26 CN CN201810386078.XA patent/CN108828327B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032949A (en) * | 2009-09-28 | 2011-04-27 | 中国科学院空间科学与应用研究中心 | External calibration device of geosynchronous orbit atmospheric temperature detecting instrument and external calibration method thereof |
| CN104793061A (en) * | 2015-04-28 | 2015-07-22 | 中国科学院空间科学与应用研究中心 | Spaceborne interferometic microwave radiometer and calibration method thereof |
| CN105738851A (en) * | 2016-02-02 | 2016-07-06 | 华中科技大学 | Synthetic aperture microwave radiometer combined correction method |
Non-Patent Citations (1)
| Title |
|---|
| 靳榕: "综合孔径微波辐射计星上外部校正方法研究", 《中国博士学位论文全文数据库 信息科技辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541325A (en) * | 2018-11-27 | 2019-03-29 | 上海航天电子通讯设备研究所 | The spaceborne one-dimensional Synthetic Aperture Microwave radioactivity detection, identificationm, and computation of one kind and measurement method |
| CN109541325B (en) * | 2018-11-27 | 2021-05-11 | 上海航天电子通讯设备研究所 | Satellite-borne one-dimensional synthetic aperture microwave radiation measurement system and measurement method |
| CN109828249A (en) * | 2019-02-22 | 2019-05-31 | 北京遥感设备研究所 | A kind of calibrating method for synthetic aperture radiometer array |
| CN110196401A (en) * | 2019-05-27 | 2019-09-03 | 西安空间无线电技术研究所 | A kind of scaling system and method for aperture synthesis phased array microwave radiometer |
| CN110196401B (en) * | 2019-05-27 | 2021-06-11 | 西安空间无线电技术研究所 | Calibration system and method for synthetic aperture phased array microwave radiometer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108828327B (en) | 2021-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9755766B2 (en) | Front end module for automatic test equipment | |
| CN104316913B (en) | Multichannel receiver real time calibration device and calibration and error compensating method | |
| JP2019053075A (en) | Vector network analyzer | |
| CN102857309B (en) | The method of testing of a kind of radio frequency index of active antenna system and device | |
| CN103675448B (en) | Vector measurement method for passive intermodulation interference | |
| CN109541558A (en) | A kind of calibration method of whole process total system Active Phase-Array Radar target seeker | |
| CN108828327A (en) | Spaceborne multiple step format one-dimensional synthesis aperture microwave radiometer scaling system and method | |
| US10042029B2 (en) | Calibration of test instrument over extended operating range | |
| WO2020119107A1 (en) | Integrated research and development platform for terahertz focal plane imaging system | |
| CN213398907U (en) | Coupled real-time calibration multi-channel coherent signal simulation device | |
| CN106656306B (en) | A kind of transponder third order intermodulation test method based on vector network analyzer | |
| CN107271994A (en) | Satellite-borne synthetic aperture radar reference function acquisition methods based on internal calibration data | |
| CN110031811B (en) | Multichannel broadband signal coherent characteristic rapid calibration system | |
| CN109541325A (en) | The spaceborne one-dimensional Synthetic Aperture Microwave radioactivity detection, identificationm, and computation of one kind and measurement method | |
| US8928333B2 (en) | Calibration measurements for network analyzers | |
| US9838986B2 (en) | Calibration of high frequency signal measurement systems | |
| US11303366B2 (en) | Passive harmonic test system and method | |
| CN107390296B (en) | A kind of quick calibrating method for passive synthetic aperture imager system | |
| CN104270209B (en) | The detection method of RRU standing-wave ratio and device based on different calibration plane | |
| CN106771712B (en) | A kind of frequency converter phase conformance testing device and method | |
| KR101325658B1 (en) | Characterization of a frequency response for a frequency translation device | |
| Rolain et al. | Why are nonlinear microwave systems measurements so involved? | |
| CN110221142A (en) | A kind of method and device of the non-linear test positioning based on passive intermodulation radiation field | |
| CN117518109B (en) | Temperature change characteristic measurement method for calibration network of azimuth multichannel spaceborne SAR antenna | |
| US11933848B2 (en) | Measurement system for characterizing a device under test |
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 | ||
| CB02 | Change of applicant information |
Address after: 201109 No. 1777 Chunchun Road, Minhang District, Shanghai Applicant after: SHANGHAI AEROSPACE ELECTRONIC COMMUNICATION EQUIPMENT Research Institute Address before: No. 76 Qiqihar Road, Yangpu District, Shanghai 200082 Applicant before: SHANGHAI AEROSPACE ELECTRONIC COMMUNICATION EQUIPMENT Research Institute |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |