CN106841828A - A kind of near field antenna test system and its method of testing based on frequency division - Google Patents
A kind of near field antenna test system and its method of testing based on frequency division Download PDFInfo
- Publication number
- CN106841828A CN106841828A CN201710100693.5A CN201710100693A CN106841828A CN 106841828 A CN106841828 A CN 106841828A CN 201710100693 A CN201710100693 A CN 201710100693A CN 106841828 A CN106841828 A CN 106841828A
- Authority
- CN
- China
- Prior art keywords
- antenna
- signal
- measured
- frequency
- sent
- 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
- 238000012360 testing method Methods 0.000 title claims abstract description 116
- 238000010998 test method Methods 0.000 title claims description 29
- 239000000523 sample Substances 0.000 claims abstract description 100
- 230000005540 biological transmission Effects 0.000 claims abstract description 73
- 238000000034 method Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 claims description 7
- 230000001427 coherent effect Effects 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 5
- 239000013078 crystal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000010363 phase shift Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- ZMYKITJYWFYRFJ-UHFFFAOYSA-N 4-oxo-4-(2-phenylethylamino)butanoic acid Chemical compound OC(=O)CCC(=O)NCCC1=CC=CC=C1 ZMYKITJYWFYRFJ-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- G01R29/10—Radiation diagrams of antennas
-
- 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
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0871—Complete apparatus or systems; circuits, e.g. receivers or amplifiers
Abstract
This application discloses a kind of near field antenna test system based on frequency division, antenna to be measured is array antenna, phased array antenna or reflector antenna；When antenna to be measured is used as reception antenna, the near field antenna test system includes signal source, converter unit, multiple probes, antenna to be measured, receiver；Signal source produces initial signal；Initial signal is converted to one group of transmission signal and is sent to multiple probes respectively simultaneously to emission by converter unit all the way；The discrete frequency of one group of transmission signal and it is similar to the frequency of initial signal；The electromagnetic wave that multiple probe gives off is after space propagation by antenna to be measured while receiving and being sent to receiver, received signal obtains the amplitude and phase of wherein variant frequency component by receiving machine testing.The application not only increases antenna measurement speed and testing efficiency, also with the accurate advantage of test result.
Description
Technical field
The application is related to the test system and its method of testing of a kind of antenna, more particularly to array antenna, phased array day
The near field test system and its near-field test method of line or reflector antenna.
Background technology
Aerial array (antenna array) is the one group set of body antenna (individual antenna).These
Individual body antenna is used for launching and/or receiving radio wave, and they link together, and control their signal (such as electric current)
With specific amplitude (amplitude) and/or phase (phase) relation.The control signal of out of phase interacts so that
The signal of aerial array is reinforced in predetermined direction, is suppressed in non-predetermined direction.This causes that aerial array is normally used as list
Individual antenna is used and treated, and has more preferable directional characteristic (directional characteristic) than individual body antenna
With antenna gain (antenna gain).
Antenna array shows numerous species.If each body antenna in aerial array can be controlled individually, that is, phase
Control array antenna (Phased Array Antenna).In phased array antenna, the signal phase of each body antenna is controlled to be designed
For --- the Net long wave radiation directional diagram (effective radiation pattern) of whole aerial array can be made in predetermined direction
It is reinforced, is suppressed in non-predetermined direction.Phase relation between the control signal of individual body antenna can be fixed, such as tower
Battle array (Tower array)；It can also be adjustable, such as wave beam control (Beam steering).Phased array antenna is wide
Broadcast, radar, space flight communication, meteorological survey, optics, radio frequency identification, the aspect such as man-machine interface are widely applied.
In field of radar, phased array antenna be generally divided into passively (passive, also referred to as passive) and actively (active, also referred to as
It is active) two kinds.During without special instruction, phased-array radar typically refers to passive phased-array radar.Passive phased-array radar is also referred to as
Passive Electronically Scanned Array (passive electronically scanned array, PESA), it only has a radio frequency source,
Produce radiofrequency signal individual by being sent to each respectively after multiple phase shift modules (phase shift module) by the radio frequency source
The transmitter unit of antenna.Active Phase-Array Radar is also referred to as Active Electronically Scanned Array (active electronically
Scanned array, AESA), its transmitting and receive capabilities are by substantial amounts of transceiver module (transmit/receive
Module) realize.Each transceiver module includes emitter, receiver and antenna, and these transceiver modules composition array is just constituted
Active Phase-Array Radar.Different from passive phased-array radar, Active Phase-Array Radar is provided with solely for each transceiver module
Vertical radio frequency source, each radio frequency source can produce the radiofrequency signal of independent (such as different frequency), these separate radio frequencies
Emitter of the signal in being sent to each transceiver module respectively after multiple phase shift modules.
A key technology of the phased array antenna in R＆D process is exactly to test, and how to be completed rapidly and accurately phased
The test of array antenna is the emphasis in current phased array antenna R＆D process.The measuring technology of phased array antenna can be divided into far field
(far field) is tested and near field (near field) tests two kinds.Far field test is normally based on the method for testing in field, outward
Boundary's electromagnetic environment is complex, it is difficult to test accurate.The space that near-field test needs is small, and it is accurate and convenient and swift to test.In recent years
Come, near-field test is increasingly using.
The near-field test of phased array antenna is generally carried out in microwave dark room, and using one or more probes (probe).
Application publication number is CN103344847A, Shen Qing Publication day is the Chinese invention patent application on October 9 in 2013
A kind of near-field measurement method of phased array antenna is disclosed, phased array antenna is tested only with a probe.Application is public
Cloth number is CN103926474A, Shen Qing Publication day is that the Chinese invention patent application on July 16 in 2014 also discloses that one kind has
The near-field measurement method of source phased array antenna, is also that phased array antenna is tested only with a probe.This single probe
Phased array can quickly complete test, but the phased array larger for electric size for the less phased array antenna of electric size
Antenna is accomplished by the testing time grown very much.Electric size therein refer to phased array antenna physical size and operation wavelength it
Than.
Authorization Notice No. is CN204595204U, authorized announcement date is in August, 2015 Chinese utility model patent of 26 days
Disclose a kind of testing scheme of transceiver module of Connectors for Active Phased Array Radar (T/R modules), using with transceiver module equal number
Multiple probes, and controlled respectively by the on-off circuit of equal number, carried out for each transceiver module to phased array antenna
Test.After carefully analyzing the cubicle switchboard configuration testing scheme, it can be found that there is following deficiency in it.First, AESA thunder
It is tens of at least up to the transceiver module quantity for being included, it is at most up to ten thousand.The program needs to set the spy with transceiver module equal number
Head and on-off circuit, the scale of this test system are very huge and with high costs.Second, different Connectors for Active Phased Array Radar institutes
Comprising transceiver module quantity it is different, the program is not used to other different AESA thunders of transceiver module quantity
Reach, thus lack versatility.Third, the program is using switch switching mode, once a receipts are tested using only a probe
Hair module, so as to realize the timesharing test to a large amount of transceiver modules, thus instead of list with multi-probe switching time
The probe traveling time of probe, substantially increases test speed.But nonetheless, the testing time of massive phased array antenna is still
It is quite very long, generally require one month or even testing time of several months.
Application publication number is CN105259544A, Shen Qing Publication day is the Chinese invention patent application on January 20 in 2016
A kind of testing scheme of transceiver module of Connectors for Active Phased Array Radar (T/R components) is disclosed, test and excitation signal is given all
Transceiver module, the phase shifter inside each transceiver module carries out orthogonal phase modulation, signal transacting respectively to test and excitation signal
Device completes the test to each transceiver module by quadrature phase demodulation again.After carefully analyzing the program, it can be found that its with
The application has substantial difference.The transceiver module that the program is directed to Connectors for Active Phased Array Radar enters the survey of line amplitude and phase
Examination, test is the input of transceiver module and the signal stream for exporting, and uses wire signal transmission means.What the application was related to
That phased array antenna is tested, test be Antenna aperture electric field induction, use transmission of wireless signals mode.
The content of the invention
Technical problems to be solved in this application are to provide a kind of near field antenna test system based on frequency division multiplexing, it is to avoid
Using switch switching mode, so as to further improve antenna measurement speed and testing efficiency, shorten the testing time.Therefore, this Shen
Please also provide corresponding antenna test method.
In order to solve the above technical problems, the near field antenna test system based on frequency division and its method of testing of the application are divided into
Two kinds of situations.The first situation be antenna to be measured as reception antenna, second situation is antenna to be measured as transmitting antenna.
When antenna to be measured is used as reception antenna, the application be based on frequency division near field antenna test system include signal source,
Converter unit, multiple probes, antenna to be measured, receiver.Signal source produces initial signal.Initial signal is by converter unit all the way
Be converted to one group of transmission signal and be sent to multiple probes respectively simultaneously to emission；The discrete frequency of one group of transmission signal and
(i.e. the frequency-splitting of each transmission signal and initial signal is much smaller than the frequency of initial signal to be similar to the frequency of initial signal
Rate).Antenna to be measured is array antenna, phased array antenna or reflector antenna.The electromagnetic wave that multiple probe gives off is passed in space
Received and be sent to receiver simultaneously by antenna to be measured after defeated, received signal obtains wherein variant frequency by receiving machine testing
The amplitude and phase of component.
When antenna to be measured is used as reception antenna, corresponding antenna test method comprises the following steps：
Step S201：Signal source produces initial signal and is sent to converter unit；
Step S202：Converter unit initial signal will be transformed to one group of transmission signal and be sent to multiple probes respectively all the way；
The discrete frequency of one group of transmission signal and it is similar to the frequency of initial signal；
Step S203：Each probe respectively will all the way transmission signal simultaneously to emission；
Step S204：Antenna to be measured receives the launched electromagnetic wave of multiple probes simultaneously, and received signal is sent to reception
Machine；
Step S205：Receiver detects the amplitude and phase of variant frequency component simultaneously from signal is received.
When antenna to be measured is in receiving position, the application is based on the near field antenna test system and its method of testing of frequency division
Optimally only need to use exclusive signal source and single pass receiver.Its method of testing is based on frequency division manner, constructs
Frequency it is different and with one group of transmission signal of the frequency difference very little of initial signal, this group of transmission signal can be simultaneously
Received and come while detect amplitude and phase by receiver by antenna to be measured, equivalent to individually being sent out in each position popped one's head in respectively
Penetrating initial signal carries out the combined situation of multiple timesharing test.The application not only saves the switching time in existing scheme
Thus improve test speed and testing efficiency, and due to this group of transmission signal and initial signal frequency difference very little because
And test result is accurate.
When antenna to be measured is used as transmitting antenna, the application be based on frequency division near field antenna test system include signal source,
Antenna to be measured, multiple probes, receiver；Signal source produces transmission signal.Antenna to be measured is phased array antenna or reflector antenna.
Transmission signal is sent to antenna pair emission to be measured.The electromagnetic wave that aerial radiation to be measured goes out is distinguished after space propagation by multiple probe
Receive simultaneously, each probe received signal is sent to reception machine testing and obtains amplitude and phase respectively.
When antenna to be measured is used as transmitting antenna, corresponding antenna test method comprises the following steps：
Step S901：Signal source produces transmission signal and is sent to antenna to be measured；
Step S902：Antenna to be measured will all the way transmission signal to emission；
Step S903：Multiple probe receives the signal that antenna to be measured is launched simultaneously respectively, and received signal is distinguished
It is sent to receiver；
Step S904：Receiver detects the amplitude and phase value of multiple received signals simultaneously.
When antenna to be measured is in transmitting position, the application is based on the near field antenna test system and its method of testing of frequency division
Need to use a receiver with multiplexer channel (i.e. multiple ports), or multiple single-channel receivers.Its test side
Method is the multiple passages by receiver to be realized being detected while the multiple signals for receiving Multi probe.
Brief description of the drawings
Fig. 1 is the schematic diagram of test system embodiment one when antenna to be measured is reception antenna.
Fig. 2 is the corresponding method of testing flow chart of test system embodiment one when antenna to be measured is reception antenna.
Fig. 3 is the schematic diagram of 8 × 8 array antennas and 8 × 1 probe groups.
Fig. 4 is the schematic diagram of test system embodiment two when antenna to be measured is reception antenna.
Fig. 5 is the corresponding method of testing flow chart of test system embodiment two when antenna to be measured is reception antenna.
Fig. 6 is the schematic diagram of test system embodiment three when antenna to be measured is reception antenna.
Fig. 7 is the corresponding method of testing flow chart of test system embodiment three when antenna to be measured is reception antenna.
Fig. 8 is the schematic diagram of test system when antenna to be measured is transmitting antenna.
Fig. 9 is test system corresponding method of testing flow chart when antenna to be measured is transmitting antenna.
Specific embodiment
Fig. 1 is referred to, when antenna to be measured is reception antenna, the application is based on the reality of the near field antenna test system of frequency division
Applying example one includes：
--- signal source, converter unit is connected by cable.The signal source is used to produce initial signal f0 and is sent to change
Frequency unit.The initial signal f0 is, for example, to be produced by crystal oscillator (crystal oscillator) and alternately through frequency
Rate conversion obtain, initial signal f0 as whole near field antenna test system test frequency.
The signal source is also sent to whole near field antenna test system using the clock signal of itself as reference signal REF
Each part, for whole near field antenna test system provides unified time reference.The reference signal REF is, for example,
10MHz。
--- converter unit, each is connected by cable and is popped one's head in.It is initial that the converter unit reception signal source is exported
Signal f0's, and one group of transmission signal ft1~ftN will be transformed to by initial signal f0 all the way, this group of transmission signal ft1~ftN
Frequency is different, but each transmission signal is much smaller than the frequency of initial signal f0 with the difference on the frequency of initial signal f0, therefore
The frequency of this group of transmission signal ft1~ftN can be approx considered the frequency of initial signal f0.This group of transmission signal
Ft1~ftN is sent to multiple probes respectively.Preferably, the quantity of transmission signal is identical with probe quantity.
It is described much smaller than referring at least to less than 1/100, preferably less than 1/103, most preferably less than 1/104, it is more preferably small
In 1/105, most preferably less than 1/106.For example, each transmission signal is several kHz with the difference on the frequency of initial signal f0, and
The frequency of initial signal f0 is typically using GHz as unit.
--- multiple probe, for one group of transmission signal ft1~ftN being exported converter unit simultaneously to emission.
One transmission signal of the discrete frequency that each probe therein is exported converter unit is simultaneously to emission.
The multiple probe is typically arranged in straight line, such as row is a line to multiple probes in the horizontal direction, or along vertical
Nogata is a row to row.Or, the multiple probe can also be arranged as the two-dimensional arrays such as circle, circular arc, rectangular matrix.
--- antenna to be measured, receiver is connected by cable.The antenna to be measured is comprising the phased of multiple individual body antennas
Array antenna or reflector antenna, multiple (all or part of) individual body antenna therein are used for the multiple probes of reception simultaneously and are radiated
Electromagnetic wave going out, in space propagation, that is, multiple probes are received by antenna to be measured simultaneously while one group of transmitting of transmitting is believed
Number ft1~ftN, the reception signal fr of antenna to be measured are sent to receiver.
--- receiver, at least with receiving channel all the way (i.e. receiving port).The receiver using only receiving all the way
While detecting the amplitude and phase of each different frequency component in the reception signal fr that passage is exported from antenna to be measured, so as to sentence
The reception characteristic of fixed antenna to be measured.
If multiple probe launches the signal of same frequency simultaneously, these signals can be in space combination, and antenna to be measured is with regard to nothing
Method is told the launched signal of each probe and is detected.Formed after initial signal f0 is carried out into atomic small frequency shift (FS)
The different transmission signal ft1~ftN of one class frequency is simultaneously launched simultaneously by multiple probe, and these signals will not be due to discrete frequency
Space combination, and antenna to be measured can also tell the launched signal of each probe and be realized detecting by receiver, and detect
Result closely approximates multiple probes transmitting initial signal f0 and situation about being received respectively by antenna to be measured respectively.For example, this Shen
Phased array near field antenna test system please launches one group of transmission signal ft1~ft8 simultaneously using 8 probes, is equivalent to adopt
Launch initial signal f0 in the position of probe one with unique probe to be received by antenna to be measured, then unique probe is moved into probe two
Position transmitting initial signal f0 received by antenna to be measured ... ..., then the position transmitting that unique probe is moved into probe eight is just
Beginning, signal f0 was received by antenna to be measured.
Preferably, the multiple probe is deployed on scanning support, and scanning support can be moved.Can be adjusted by motion scan frame
The position relationship between antenna to be measured and multiple probes is saved, so that the position of probe covers the whole near-field scan of antenna to be measured
Face.
Fig. 2 is referred to, the corresponding method of testing of embodiment one of the near field antenna test system based on frequency division shown in Fig. 1
Comprise the following steps：
Step S201：Signal source produces initial signal f0 and is sent to converter unit.Additionally, signal source is also by the clock of itself
Signal is sent to each part of whole near field antenna test system as reference signal REF, is whole near field antenna test system
System provides unified time reference, at least including being sent to converter unit and receiver as clock signal.
Step S202：Converter unit will be transformed to one group of transmission signal by initial signal f0 all the way, and be sent to multiple spies respectively
Head.The frequency of this group of transmission signal ft1~ftN is different, but is all approximately equal to the frequency of initial signal f0.It is preferred that
Ground, the quantity of transmission signal is identical with probe quantity.
Step S203：Multiple probe is respectively by one group of transmission signal ft1~ftN simultaneously to emission.In other words, each
Probe is respectively by the transmission signal all the way of discrete frequency simultaneously to emission.
Step S204：Phased array antenna to be measured or reflector antenna are used as reception antenna, while receiving multiple probe institutes
The electromagnetic wave of transmitting, i.e., receive multiple one group of launched transmission signal ft1~ftN that pop one's head in simultaneously, and received signal fr is sent
Toward receiver.
Step S205：Receiver detects the amplitude and phase of variant frequency component simultaneously from received signal fr
Value, so as to judge the reception characteristic of antenna to be measured.
Preferably, also include after step S205：Repeat step S201 to step S205 and every time use different frequencies
The initial signal f0 of rate, thus and thus enters line frequency traverse scanning until completing the test of the whole frequency range of antenna to be measured.
Preferably, also include after step S205：Repeat step S201 to step S205 and each motion scan frame
Position.Multiple probes as transmitting terminal and the antenna to be measured as receiving terminal are alternatively deployed on scanning support, by moving
Dynamic scanning support can be with the position relationship between constantly regulate antenna to be measured and multiple probes, until observation is treated in the position covering of probe
The whole near-field scan face of line.
For example refer to Fig. 3, it is assumed that antenna to be measured is comprising 64 array elements (i.e. individual body antenna) and is arranged as 8 rows 8 and arranges, can be with
It is phased array antenna or reflector antenna.Arrange as 8 probes of a row are fixed on scanning support.Assuming that the work of antenna to be measured is frequently
Section is 18GHz~20GHz, and the scanning stepping of test frequency is 1GHz, then frequency traverse scanning and the whole near-field scan of covering
The test process in face is as follows.
18GHz being tested first, therefore initial signal f0 being set to 18GHz, initial signal f0 is transformed to one by converter unit
8 transmission signal ft1~ft8 of group be for example respectively 17.997GHz, 17.998GHz, 17.999GHz, 18GHz, 18.001GHz,
18.002GHz、18.003GHz、18.004GHz.8 probes for a row are arranged while launching 8 transmission signals of this group respectively
Ft1~ft8, antenna to be measured receives these signals and is transmitted to receiver detection and analysis simultaneously, it is possible thereby to judge that antenna to be measured exists
The reception characteristic of 18GHz.19GHz, 20GHz are tested using the same manner.
Then motion scan frame, repeats the process of above-mentioned test 18GHz, 19GHz, 20GHz.For example set according to test frequency
Probe sampling interval is put, in this, as the mobile step value of scanning support.Continuous motion scan frame simultaneously repeats above-mentioned test process, with
Make row for one row 8 probe and antenna to be measured between position relationship be continually changing, until probe position traveled through it is to be measured
The whole near-field scan face of antenna, so as to obtain antenna to be measured the connecing in each test frequency in the whole near-field scan face of probe covering
Receive characteristic.
Preferably, also include after step S205, the near field to far field of phased array antenna is realized by existing algorithm
Conversion, obtains the information such as the antenna pattern of phased array antenna.For example, first carrying out each of above-mentioned method of testing for antenna to be measured
Step obtains amplitude and phase distribution of the antenna to be measured as reception antenna on near-field scan face, then according to measurement data,
The characteristic of probe and the positional information in near-field scan face, the full detail of Antenna Far Field characteristic is calculated by existing algorithm.Will
Each step that antenna to be measured is changed to after standard gain antenna to re-start above-mentioned method of testing obtains the antenna of standard gain antenna
The full detail of far-field characteristic, nominal gain value calculates the yield value of antenna to be measured according to known to standard gain antenna, completes
The gain test of antenna to be measured.
Fig. 4 is referred to, this is that the application is based on the near field antenna test system of frequency division when antenna to be measured is reception antenna
Embodiment two.Compared with embodiment one, embodiment two gives a kind of specific implementation of converter unit.The frequency conversion list
Unit specifically includes：
--- allocation unit, for that will copy as multichannel initial signal f0 by initial signal f0 all the way, and is sent to each respectively
Mixing unit is used as the first input.
--- local oscillator unit, for producing one group of M signal fm1~fmN, and is sent to each mixing unit conduct respectively
Second input.The frequency of this group of M signal fm1~fmN is different, and each M signal is much smaller than initial letter
The frequency of number f0.
The local oscillator unit can use local oscillator (local oscillator), frequency multiplier (frequency
Multiplier), any one or more of frequency divider (frequency divider), frequency mixer (frequency mixer)
Combination realize.Such as frequency component Δ f can be carried out by the output signal to local oscillator and/or reference signal REF
Frequency dividing, frequency multiplication and/or mixing are realized.
--- multiple mixing units, each mixing unit be used for by first input be input into second be added into line frequency and/
Or frequency is subtracted each other (i.e. mixing) and is exported afterwards.One group of different transmission signal of multiple mixing unit difference output multi-channel frequencies
Ft1~ftN, this group of transmission signal ft1~ftN is sent to multiple probes respectively.Preferably, the quantity of transmission signal and probe number
Amount is identical.
For example, M signal fmn=(n-1) Δ f, transmission signal ftn=f0+fmn=f0+ (n-1) Δ f, wherein n's takes
Value scope is natural number and 1≤n≤N.
Fig. 5 is referred to, the corresponding method of testing of embodiment two of the near field antenna test system based on frequency division shown in Fig. 4
Comprise the following steps：
Step S501：Signal source produces initial signal f0 and is sent to allocation unit.Additionally, signal source is also by the clock of itself
Signal is sent to each part of whole test system as reference signal REF, for whole test system provides the unified time
Benchmark, at least including being sent to allocation unit, local oscillator unit, mixing unit and receiver as clock signal.
Step S502：Allocation unit will copy as multichannel initial signal f0 by initial signal f0 all the way, and be respectively supplied to each
Individual mixing unit is used as the first input.
Step S503：Local oscillator unit produces one group of M signal fm1~fmN, and is sent to each mixing unit conduct respectively
Second input.The frequency of this group of M signal fm1~fmN is different, and each M signal is with initial signal f0's
Difference on the frequency is much smaller than the frequency of initial signal f0.
The order of the step S502 and step S503 can be exchanged or while carried out.
Step S504：With second be input into (in one group for the respective first input (initial signal f0) by each mixing unit
Between in signal fm1~fmN) enter line frequency and be added and/or obtain one group of transmission signal ft1 after frequency is subtracted each other (be mixed)
One in~ftN, multiple mixing units just export one group of transmission signal ft1~ftN and are sent to multiple probes respectively.This group
The frequency of transmission signal ft1~ftN is different, but is all approximately equal to the frequency of initial signal f0.Preferably, transmission signal
Quantity with probe quantity it is identical.
Here is step S505 to step S507, is respectively equivalent to step S203 to step S205, is repeated no more.
Embodiment two can also use with the identical frequency traverse scanning of embodiment one, the whole near-field scan face of probe covering,
The additional aspects such as the conversion of near-field test parameter and far field test parameter.
Fig. 6 is referred to, this is that the application is based on the near field antenna test system of frequency division when antenna to be measured is reception antenna
Embodiment three.Compared with embodiment one, the multiple signal sources of embodiment three instead of exclusive signal source in embodiment one and
Converter unit.
The multiple signal source connects each and pops one's head in by cable.The multiple signal source is used to produce one group of hair of coherent
Penetrate signal ft1~ftN.Coherent refers to the phase relation with determination between the signal that each signal source is produced.This group transmitting letter
The frequency of number ft1~ftN is different, but difference on the frequency is much smaller than any one transmission signal between any two transmission signal
Frequency, therefore the frequency of this group of transmission signal ft1~ftN can approx be thought to be equal to test frequency f0.This
Group transmission signal ft1~ftN is sent to multiple probes respectively.Preferably, the quantity of transmission signal is identical with probe quantity.
Additionally, at least one signal source is also sent to whole test system using the clock signal of itself as reference signal REF
Each part, for whole test system provides unified time reference.The reference signal REF is, for example, 10MHz.
Fig. 7 is referred to, the corresponding method of testing of embodiment three of the near field antenna test system based on frequency division shown in Fig. 6
Comprise the following steps：
Step S701：Multiple signal sources produce one group of transmission signal ft1~ftN of coherent respectively, and are sent to multiple respectively
Probe.The frequency of this group of transmission signal ft1~ftN is different, but frequency closely thus can approx think frequency
Rate is identical.Preferably, the quantity of transmission signal is identical with probe quantity.
Additionally, at least one signal source is also sent to whole test system using the clock signal of itself as reference signal REF
Each part, for whole test system provides unified time reference, at least including being sent to receiver as clock signal.
Here is step S702 to step S704, is respectively equivalent to step S203 to step S205, is repeated no more.
Embodiment three can also use with the identical frequency traverse scanning of embodiment one, the whole near-field scan face of probe covering,
The additional aspects such as the conversion of near-field test parameter and far field test parameter.
Compared with the phased array near field antenna test system of existing single probe, the near field antenna test system of the application is adopted
With Multi probe, antenna measurement speed and testing efficiency can be significantly increased, shorten the testing time.With existing multi-probe phase
Control battle array near field antenna test system is compared, and the application instead of switch switching side in frequency division (frequency division) mode
Formula, due to eliminating switching time, and multiple probes can be launched by antenna to be measured reception simultaneously and by receiving together
The single channel of machine is tested and analyzed, and further increases antenna measurement speed and testing efficiency, shortens the testing time.
Fig. 8 is referred to, when antenna to be measured is transmitting antenna, the application is based on the near field antenna test system bag of frequency division
Include：
--- signal source, antenna to be measured is connected by cable.The signal source is used to produce transmission signal fr and be sent to treat
Observation line.The transmission signal ft is, for example, to be generated by frequency transformation by crystal oscillator to obtain, and transmission signal ft makees
It is the test frequency of whole near field antenna test system.
The signal source is also sent to whole near field antenna test system using the clock signal of itself as reference signal REF
Each part, for whole near field antenna test system provides unified time reference.The reference signal REF is, for example,
10MHz。
--- antenna to be measured, is phased array antenna or reflector antenna comprising multiple individual body antennas, for by riches all the way
Signal ft is penetrated to emission.
--- multiple probe, by cable connection receiver.Multiple is popped one's head in for being sent out while receiving antenna to be measured respectively
The signal ft for penetrating, multiple probe received signal fr1~frN are sent to each port of receiver or multiple receive respectively
Machine.For example, port number of the probe quantity less than or equal to receiver.
--- receiver, with multipath reception passage, or multiple receivers.These receiving channels are used to detect simultaneously
One group of amplitude and phase of reception signal fr1~frN, so as to judge the emission characteristics of antenna to be measured.For example, four ports of routine
Vector network analyzer has 8 road coherent receiving channels, is equivalent to be that an independent single channel connects per receiving channel all the way
Receipts machine.Receiver with multiple receiving channels can also be changed to multiple single-channel receivers.
Preferably, the multiple probe is deployed on scanning support, and scanning support can be moved.Can be adjusted by motion scan frame
The position relationship between antenna to be measured and multiple probes is saved, so that the position of probe covers the whole near-field scan of antenna to be measured
Face.
Fig. 9 is referred to, the corresponding method of testing of phased array near field antenna test system based on frequency division shown in Fig. 8 includes
Following steps：
Step S901：Signal source produces transmission signal ft and is sent to antenna to be measured.Additionally, signal source is also by the clock of itself
Signal is sent to each part of whole near field antenna test system as reference signal REF, is whole near field antenna test system
System provides unified time reference.
Step S902：Antenna to be measured will all the way transmission signal ft to emission.
Step S903：Multiple probe receives the transmission signal ft all the way that antenna to be measured is launched respectively simultaneously, each probe
Received signal fr1~frN is sent to receiver respectively respectively.
Step S904：Receiver detects the amplitude and phase value of one group of reception signal fr1~frN simultaneously, so as to judge to treat
The emission characteristics of observation line.
Antenna test method when antenna to be measured is as transmitting antenna, day when can also use antenna to be measured as reception antenna
Each embodiment identical frequency traverse scanning of wire testing method, the whole near-field scan face of probe covering, the change near field to far field
Change and the additional method step such as mouth face inverting.
The preferred embodiment of the application is these are only, is not used to limit the application.Come for those skilled in the art
Say, the application there can be various modifications and variations.It is all any modifications within spirit herein and principle, made, equivalent
Replace, improve etc., should be included within the protection domain of the application.
Claims (10)
1. a kind of near field antenna test system based on frequency division, it is characterized in that, antenna to be measured is array antenna or phased array antenna
Or reflector antenna；When antenna to be measured is used as reception antenna, the near field antenna test system includes signal source, frequency conversion list
Unit, multiple probes, antenna to be measured, receiver；Signal source produces initial signal；Initial signal is converted to by converter unit all the way
One group of transmission signal is simultaneously sent to multiple probes simultaneously to emission respectively；The discrete frequency of one group of transmission signal and approximate
In the frequency of initial signal；The multiple electromagnetic wave that gives off of probe is after space propagation by antenna to be measured while receiving and being sent to and connect
Receipts machine, received signal obtains the amplitude and phase of wherein variant frequency component by receiving machine testing.
2. the near field antenna test system based on frequency division according to claim 1, it is characterized in that, the converter unit enters one
Step includes allocation unit, local oscillator unit, multiple mixing units；Initial signal copies as multichannel and initially believes by allocation unit all the way
Number and be respectively supplied to each mixing unit；Reference signal is one group of M signal by local oscillator cell translation and carries respectively all the way
Supply each mixing unit；The discrete frequency of one group of M signal and much smaller than initial signal frequency；Per first all the way
Beginning signal obtains a transmission signal in each mixing unit with each M signal by output after mixing；Multiple mixing
Unit just exports one group of transmission signal.
3. the near field antenna test system based on frequency division according to claim 1 and 2, it is characterized in that, the signal source with
Converter unit is omitted, and is changed to multiple signal sources；One group of coherent of the multiple signal source generation, discrete frequency transmission signal；
This group of transmission signal is sent to multiple probes simultaneously to emission respectively.
4. the Antenna testing system based on frequency division according to claim 1, it is characterized in that, when antenna to be measured is used as transmitting day
During line, the Antenna testing system includes signal source, antenna to be measured, multiple probes, receiver；Signal source produces transmission signal；
Transmission signal is sent to antenna pair emission to be measured；The electromagnetic wave that aerial radiation to be measured goes out is distinguished after space propagation by multiple probe
Receive, each probe received signal is sent to reception machine testing and obtains amplitude and phase respectively.
5. the near field antenna test system based on frequency division according to claim 1 and 2, it is characterized in that, the multiple probe
It is fixed on moveable scanning support.
6. a kind of antenna test method based on frequency division, it is characterized in that, when antenna to be measured is used as reception antenna, the antenna is surveyed
Method for testing comprises the following steps：
Step S201：Signal source produces initial signal and is sent to converter unit；
Step S202：Converter unit initial signal will be transformed to one group of transmission signal and be sent to multiple probes respectively all the way；It is described
One group of discrete frequency of transmission signal and it is similar to the frequency of initial signal；
Step S203：Each probe respectively will all the way transmission signal simultaneously to emission；
Step S204：Antenna to be measured receives the launched electromagnetic wave of multiple probes simultaneously, and received signal is sent to receiver；
Step S205：Receiver detects the amplitude and phase value of variant frequency component simultaneously from received signal.
7. the antenna test method based on frequency division according to claim 6, it is characterized in that, the step S201 to step
S202 is changed to step S501 to step S504；
Step S501：Signal source produces initial signal and is sent to allocation unit；
Step S502：Allocation unit initial signal will copy as multichannel all the way, and be respectively supplied to each mixing unit as
One input；
Step S503：Local oscillator unit produces one group of M signal and is sent to each mixing unit respectively as the second input；It is described
One group of discrete frequency of M signal and much smaller than initial signal frequency；
Or, the order of the step S502 and step S503 is exchanged or carried out simultaneously；
Step S504：Each mixing unit obtains a transmission signal after the respective first input is mixed with the second input,
Multiple mixing units just export one group of transmission signal and are sent to multiple probes respectively.
8. the antenna test method based on frequency division according to claim 6 or 7, it is characterized in that, the step S201 is to walking
Rapid S202 or step S501 to step S504 is changed to step S701；
Step S701：Multiple signal sources produce one group of coherent, discrete frequency transmission signal respectively, and are sent to multiple spies respectively
Head.
9. the antenna test method based on frequency division according to claim 6 or 7, it is characterized in that, when antenna to be measured is used as hair
When penetrating antenna, the antenna test method comprises the following steps：
Step S901：Signal source produces transmission signal and is sent to antenna to be measured；
Step S902：Antenna to be measured will all the way transmission signal to emission；
Step S903：Multiple probe receives the signal that antenna to be measured is launched simultaneously respectively, and received signal is sent to respectively
Receiver；
Step S904：Receiver detects the amplitude and phase value of multiple received signals simultaneously.
10. the antenna test method based on frequency division according to claim 6 or 7, it is characterized in that, the antenna test method
Further comprising the steps of one or more：Using frequency traverse scanning, the whole near-field scan face of probe covering, carry out near field and arrive
The directional diagram conversion and mouth face inverting in far field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710100693.5A CN106841828B (en) | 2017-02-23 | 2017-02-23 | Near field antenna test system and method based on frequency division |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710100693.5A CN106841828B (en) | 2017-02-23 | 2017-02-23 | Near field antenna test system and method based on frequency division |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106841828A true CN106841828A (en) | 2017-06-13 |
| CN106841828B CN106841828B (en) | 2024-01-30 |
Family
ID=59133382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710100693.5A Active CN106841828B (en) | 2017-02-23 | 2017-02-23 | Near field antenna test system and method based on frequency division |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106841828B (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390037A (en) * | 2017-07-06 | 2017-11-24 | 广东曼克维通信科技有限公司 | Antenna near-field test device and method |
| CN108414844A (en) * | 2018-03-15 | 2018-08-17 | 上海民航华东空管工程技术有限公司 | A kind of test method of target antenna radiation pattern |
| CN108462540A (en) * | 2018-03-28 | 2018-08-28 | 北京聚利科技股份有限公司 | The calibrating installation and system of phased array antenna |
| CN109085431A (en) * | 2017-06-14 | 2018-12-25 | 罗德施瓦兹两合股份有限公司 | Test macro and test method |
| CN109669077A (en) * | 2017-10-13 | 2019-04-23 | 安立股份有限公司 | Antenna assembly and measurement method |
| CN110095658A (en) * | 2018-01-31 | 2019-08-06 | 罗克韦尔柯林斯公司 | Method and system for ESA measurement |
| CN110806565A (en) * | 2019-12-06 | 2020-02-18 | 湖南宜通华盛科技有限公司 | Device and method for testing full-link directional diagram of phased array radar |
| CN111044802A (en) * | 2019-12-04 | 2020-04-21 | 上海霍莱沃电子系统技术股份有限公司 | Phased array antenna unit amplitude and phase balancing method and device based on aperture field |
| CN111244631A (en) * | 2018-11-29 | 2020-06-05 | 安立股份有限公司 | Antenna device and measuring method |
| CN111551796A (en) * | 2020-04-15 | 2020-08-18 | 广州杰赛科技股份有限公司 | Testing device and method for 5G millimeter wave microstrip array antenna |
| CN111624415A (en) * | 2020-06-09 | 2020-09-04 | 中国电子科技集团公司第十四研究所 | System and method for testing antenna on robot arm piece |
| CN111865444A (en) * | 2019-04-29 | 2020-10-30 | 深圳市通用测试系统有限公司 | Phased array antenna calibration system and calibration method |
| CN112255469A (en) * | 2020-08-31 | 2021-01-22 | 西安空间无线电技术研究所 | Antenna arbitrary curved surface near field test phase acquisition device and method without reference signal |
| CN113252999A (en) * | 2021-04-30 | 2021-08-13 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Antenna plane near-field test method |
| CN113834973A (en) * | 2020-06-24 | 2021-12-24 | 扬博科技股份有限公司 | Package antenna yield detection device |
| CN114252708A (en) * | 2022-03-01 | 2022-03-29 | 陕西拾贝通讯技术有限公司 | Automatic calibration method for antenna gain with controllable precision |
| WO2022067477A1 (en) * | 2020-09-29 | 2022-04-07 | Huawei Technologies Co., Ltd. | Method for far-field estimation and apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764938A (en) * | 2015-03-10 | 2015-07-08 | 中国电子科技集团公司第十研究所 | Antenna near field measuring method provided with self-contained phase reference channel |
| CN105515690A (en) * | 2015-11-26 | 2016-04-20 | 西安空间无线电技术研究所 | Frequency conversion antenna near field frequency sweeping testing system and testing method thereof |
| JP2016151550A (en) * | 2015-02-19 | 2016-08-22 | 三菱電機株式会社 | Delay time difference measuring device, phased array antenna apparatus, delay time difference measuring method and phased array antenna calibration method |
| CN105911531A (en) * | 2016-04-08 | 2016-08-31 | 中国电子科技集团公司第三十八研究所 | On-site calibration device for phased array antenna |
| CN106164685A (en) * | 2014-04-08 | 2016-11-23 | 亚德诺半导体集团 | Determine active antenna system and the method for intermodulation distortion performance |
-
2017
- 2017-02-23 CN CN201710100693.5A patent/CN106841828B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106164685A (en) * | 2014-04-08 | 2016-11-23 | 亚德诺半导体集团 | Determine active antenna system and the method for intermodulation distortion performance |
| JP2016151550A (en) * | 2015-02-19 | 2016-08-22 | 三菱電機株式会社 | Delay time difference measuring device, phased array antenna apparatus, delay time difference measuring method and phased array antenna calibration method |
| CN104764938A (en) * | 2015-03-10 | 2015-07-08 | 中国电子科技集团公司第十研究所 | Antenna near field measuring method provided with self-contained phase reference channel |
| CN105515690A (en) * | 2015-11-26 | 2016-04-20 | 西安空间无线电技术研究所 | Frequency conversion antenna near field frequency sweeping testing system and testing method thereof |
| CN105911531A (en) * | 2016-04-08 | 2016-08-31 | 中国电子科技集团公司第三十八研究所 | On-site calibration device for phased array antenna |
Non-Patent Citations (2)
| Title |
|---|
| 王真: ""一种数字天线测试系统"" * |
| 董李静 等: ""多探头球面近场测试中的天线校准研究"" * |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085431A (en) * | 2017-06-14 | 2018-12-25 | 罗德施瓦兹两合股份有限公司 | Test macro and test method |
| CN107390037A (en) * | 2017-07-06 | 2017-11-24 | 广东曼克维通信科技有限公司 | Antenna near-field test device and method |
| CN109669077A (en) * | 2017-10-13 | 2019-04-23 | 安立股份有限公司 | Antenna assembly and measurement method |
| CN110095658A (en) * | 2018-01-31 | 2019-08-06 | 罗克韦尔柯林斯公司 | Method and system for ESA measurement |
| CN108414844A (en) * | 2018-03-15 | 2018-08-17 | 上海民航华东空管工程技术有限公司 | A kind of test method of target antenna radiation pattern |
| CN108462540A (en) * | 2018-03-28 | 2018-08-28 | 北京聚利科技股份有限公司 | The calibrating installation and system of phased array antenna |
| CN108462540B (en) * | 2018-03-28 | 2024-04-26 | 北京聚利科技有限公司 | Phased array antenna calibration device and system |
| CN111244631B (en) * | 2018-11-29 | 2022-05-10 | 安立股份有限公司 | Antenna device and measuring method |
| CN111244631A (en) * | 2018-11-29 | 2020-06-05 | 安立股份有限公司 | Antenna device and measuring method |
| CN111865444B (en) * | 2019-04-29 | 2022-09-16 | 深圳市通用测试系统有限公司 | Phased array antenna calibration system and calibration method |
| CN111865444A (en) * | 2019-04-29 | 2020-10-30 | 深圳市通用测试系统有限公司 | Phased array antenna calibration system and calibration method |
| CN111044802A (en) * | 2019-12-04 | 2020-04-21 | 上海霍莱沃电子系统技术股份有限公司 | Phased array antenna unit amplitude and phase balancing method and device based on aperture field |
| CN110806565A (en) * | 2019-12-06 | 2020-02-18 | 湖南宜通华盛科技有限公司 | Device and method for testing full-link directional diagram of phased array radar |
| CN110806565B (en) * | 2019-12-06 | 2024-04-16 | 浙江宜通华盛科技有限公司 | Testing device and method for phased array radar all-link directional diagram |
| CN111551796A (en) * | 2020-04-15 | 2020-08-18 | 广州杰赛科技股份有限公司 | Testing device and method for 5G millimeter wave microstrip array antenna |
| CN111551796B (en) * | 2020-04-15 | 2022-04-12 | 广州杰赛科技股份有限公司 | Testing device and method for 5G millimeter wave microstrip array antenna |
| CN111624415B (en) * | 2020-06-09 | 2024-05-07 | 中国电子科技集团公司第十四研究所 | System and method for testing antenna on chip of robot arm |
| CN111624415A (en) * | 2020-06-09 | 2020-09-04 | 中国电子科技集团公司第十四研究所 | System and method for testing antenna on robot arm piece |
| CN113834973B (en) * | 2020-06-24 | 2024-01-26 | 扬博科技股份有限公司 | Packaged antenna yield detection device |
| CN113834973A (en) * | 2020-06-24 | 2021-12-24 | 扬博科技股份有限公司 | Package antenna yield detection device |
| CN112255469A (en) * | 2020-08-31 | 2021-01-22 | 西安空间无线电技术研究所 | Antenna arbitrary curved surface near field test phase acquisition device and method without reference signal |
| CN112255469B (en) * | 2020-08-31 | 2023-12-12 | 西安空间无线电技术研究所 | Antenna arbitrary curved surface near field test phase acquisition device and method without reference signal |
| WO2022067477A1 (en) * | 2020-09-29 | 2022-04-07 | Huawei Technologies Co., Ltd. | Method for far-field estimation and apparatus |
| CN113252999A (en) * | 2021-04-30 | 2021-08-13 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Antenna plane near-field test method |
| CN114252708B (en) * | 2022-03-01 | 2022-05-17 | 陕西拾贝通讯技术有限公司 | Automatic calibration method for antenna gain with controllable precision |
| CN114252708A (en) * | 2022-03-01 | 2022-03-29 | 陕西拾贝通讯技术有限公司 | Automatic calibration method for antenna gain with controllable precision |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106841828B (en) | 2024-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106841828A (en) | A kind of near field antenna test system and its method of testing based on frequency division | |
| CN206515399U (en) | A kind of near field antenna test system based on frequency division | |
| CN107026695B (en) | System and method for testing and calibrating multiple-input multiple-output antenna array including digital interface | |
| US10663563B2 (en) | On-site calibration of array antenna systems | |
| CN102545935B (en) | Calibration receiving device and calibration receiving method of radio frequency simulation system | |
| EP3447940B1 (en) | Test arrangement and test method | |
| RU2543557C2 (en) | System of simulation of electromagnetic environment with network of multiple probes | |
| CN206515400U (en) | A kind of antenna rapid detection system based on code division | |
| CN107390035B (en) | Antenna measurement system and antenna measurement method | |
| CN104618041B (en) | A kind of channel data back method and device | |
| CN201765324U (en) | Automatic tester of phased-array antenna | |
| US11131701B1 (en) | Multi-probe anechoic chamber for beam performance testing of an active electronically steered array antenna | |
| CN106970271A (en) | One kind digitlization Antenna testing system and method for testing | |
| CN110398638A (en) | A kind of phased array antenna test method and phased array antenna test macro | |
| CN108494512B (en) | Millimeter wave large-scale MIMO channel simulation system and method | |
| JP2017207464A (en) | Antenna measuring system and antenna measuring method | |
| CN110492917A (en) | A kind of digital beamf orming array and realize transceiver channel amplitude, phase automatic calibration method | |
| Jam et al. | A submillimeter-wave near-field measurement setup for on-wafer pattern and gain characterization of antennas and arrays | |
| CN109085431A (en) | Test macro and test method | |
| CN106872806A (en) | A kind of antenna rapid detection system and its method of testing based on code division | |
| EP3376240B1 (en) | Measuring system and method with digital quiet zone | |
| CN110411977B (en) | Full-electronic terahertz tomography device and control method thereof | |
| KR101564729B1 (en) | Method for arranging array plane of phase array antenna and method for operating the same | |
| Lyu et al. | Enabling long-range large-scale channel sounding at sub-thz bands: Virtual array and radio-over-fiber concepts | |
| CN108896831A (en) | The method that a kind of combination interior near field and far field carry out OTA measurement to active antenna |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |