CN113258288A - Phased array antenna beam control device and control method - Google Patents

Phased array antenna beam control device and control method Download PDF

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Publication number
CN113258288A
CN113258288A CN202110674208.1A CN202110674208A CN113258288A CN 113258288 A CN113258288 A CN 113258288A CN 202110674208 A CN202110674208 A CN 202110674208A CN 113258288 A CN113258288 A CN 113258288A
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array element
array
calibration
array elements
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CN113258288B (en
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黄洪云
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Sichuan Huadun Defense Technology Co ltd
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Chengdu Kelai Microwave Technology Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • 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
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/54—Testing for continuity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems

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Abstract

The invention discloses a phased array antenna beam control method, which comprises the following steps: performing starting fault detection and isolation on the phased array antenna; performing fault detection on all array elements in the phased array antenna in the starting process, wherein the fault detection comprises the steps of performing connectivity test on all array elements when the phased array antenna is started, performing temperature detection on the array elements passing the test, performing power detection, determining that the array elements are normal array elements if the power detection of the array elements passes the test, enabling the normal array elements to enter a standby state, performing power detection on one type of fault array elements, and determining that the one type of fault array elements passing the power detection are emergency array elements; carrying out phase measurement and calibration on the normal array elements and the emergency array elements which enter the standby state, so that the phases of all the array elements are kept consistent; after the phase calibration of each array element is completed, the emergent array elements are dormant, and the wave beams are controlled through the normal array elements; the invention can distinguish different array element faults and improve the adaptability to the phased array antenna faults.

Description

Phased array antenna beam control device and control method
Technical Field
The invention relates to the field of antennas, in particular to a phased array antenna beam control device and a phased array antenna beam control method.
Background
Compared with a traditional mechanism scanning antenna, the phased array antenna has the advantages of being rich in functions, light in weight, fast in beam scanning, high in precision and the like, and is more and more widely applied to the field of satellite effective loads. Along with the increase of phased array antenna system service environment variety, phased array antenna system functional requirement is also abundant day by day, however whole phased array antenna system's reliability problem also more and more outstanding, moreover, phased array antenna cost is high, and changes the cycle length, consequently, how to make phased array antenna under the condition that has partial trouble array element, can also work normally, satisfies certain work demand, is the subject of study at present.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a phased array antenna beam control method, which comprises the following steps:
firstly, performing starting fault detection and isolation on a phased array antenna; carrying out fault detection on all array elements in the phased array antenna in the starting process, wherein the fault detection comprises the steps of carrying out connectivity test on all the array elements when the phased array antenna is started, carrying out temperature detection on the array elements passing the test, and if the temperature rise coefficient of the array elements is within the set starting time length
Figure DEST_PATH_IMAGE001
Within the range of the set temperature rise coefficient threshold value, carrying out power detection, otherwise, the array element is a type of fault array element; if the array element power detection is passed, the array element is a normal array element, the normal array element enters a standby state, otherwise, the array element is a second type of fault array element;
step two, performing power detection on the first-class fault array elements, taking the first-class fault array elements passing the power detection as emergency array elements, dividing the failed array elements into second-class fault array elements, and performing offline on the second-class fault array elements;
step three, performing phase measurement and calibration on the normal array elements and the emergency array elements which enter the standby state, so that the phases of all the array elements are kept consistent, and meanwhile, the total emission power of the array elements is obtained;
after the phase calibration of each array element is completed, the emergent array elements are dormant, and the wave beams are controlled through the normal array elements;
and step five, when the beam transmitting power requirement is greater than the total transmitting power of the normal array elements, calling the emergency array elements to supplement power, and completing beam transmitting.
Further, the temperature rise coefficient
Figure 273183DEST_PATH_IMAGE001
Calculated using the following formula:
the starting time period T comprises a temperature rising period
Figure 567898DEST_PATH_IMAGE002
And temperature stabilization period
Figure DEST_PATH_IMAGE003
The array element temperature ready coefficient is as follows:
Figure 198600DEST_PATH_IMAGE004
rate of rise of temperature of array elements
Figure DEST_PATH_IMAGE005
Comprises the following steps:
Figure 945976DEST_PATH_IMAGE006
therein
Figure 100002_DEST_PATH_IMAGE007
Is the temperature data of the array element after the starting time length T,
Figure 562902DEST_PATH_IMAGE008
is the temperature and temperature rise coefficient of the array element at the start
Figure 915386DEST_PATH_IMAGE001
Comprises the following steps:
Figure 100002_DEST_PATH_IMAGE009
。
further, the array element power detection includes the following processes:
inputting a test signal, detecting the output power of the array element, carrying out deviation calculation on the output power of the array element and the rated output power to obtain a deviation value, and if the deviation value is within a set deviation threshold range, the power detection of the array element is passed.
Further, the phase measurement and calibration of the normal array elements and the emergency array elements entering the standby state are performed to keep the phases of the array elements consistent, and the method comprises the following steps:
the method for measuring and calibrating the phases of the normal array elements and the emergency array elements which enter the standby state to keep the phases of the array elements consistent comprises the following steps:
step one, setting a calibration signal
Figure 949945DEST_PATH_IMAGE010
After array element 0, a signal is obtained
Figure DEST_PATH_IMAGE011
Collecting the signal
Figure 856721DEST_PATH_IMAGE011
Sample points, obtaining the phase of array element 0 through fast Fourier transform
Figure 605234DEST_PATH_IMAGE012
(ii) a Obtaining the phase of any array element n except the array element 0 by the same method
Figure DEST_PATH_IMAGE013
(ii) a In which the calibration signal
Figure 343383DEST_PATH_IMAGE014
The following formula is adopted:
Figure 100002_DEST_PATH_IMAGE015
wherein: omega is the signal frequency; theta is the signal phase; a is a signal amplitude value, and the amplitude value A is kept unchanged;
after passing array element 0, the signal
Figure 925674DEST_PATH_IMAGE014
Become into
Figure 178801DEST_PATH_IMAGE016
：
Figure 100002_DEST_PATH_IMAGE017
Wherein
Figure 871950DEST_PATH_IMAGE018
For the array element 0 group delay error,
Figure 933447DEST_PATH_IMAGE019
the local oscillation phase error is array element 0;
signals of array element 0
Figure 483377DEST_PATH_IMAGE020
Sample points, obtaining local oscillation phase of array element 0 by fast Fourier transform
Figure 223800DEST_PATH_IMAGE021
：
Figure 517378DEST_PATH_IMAGE022
Similarly, the local oscillation phase of the array element n is:
Figure 902223DEST_PATH_IMAGE023
，
wherein
Figure 91896DEST_PATH_IMAGE024
For the delay error of the n groups of array elements,
Figure DEST_PATH_IMAGE025
for array element n local oscillator phase errorA difference; in the formula
Figure 352238DEST_PATH_IMAGE026
To represent
Figure 100002_DEST_PATH_IMAGE027
The real part of,
Figure 121611DEST_PATH_IMAGE028
To represent
Figure 688859DEST_PATH_IMAGE027
An imaginary part of (d);
step two, under the conditions of clock homology, local oscillator synchronization and acquisition synchronization, the phase difference of the array element 0 and the array element n is obtained by taking the array element 0 as a reference
Figure 100002_DEST_PATH_IMAGE029
Obtaining group delay error
Figure 642908DEST_PATH_IMAGE030
(ii) a The phase difference adopts the following formula:
Figure 233290DEST_PATH_IMAGE031
Figure 100002_DEST_PATH_IMAGE032
the group delay error is:
Figure DEST_PATH_IMAGE033
the local oscillator phase error is:
Figure 196566DEST_PATH_IMAGE034
the method comprises the following specific steps:
first, the
Figure DEST_PATH_IMAGE035
Of the calibration signal
Figure 556004DEST_PATH_IMAGE036
To obtain the local oscillator phase error
Figure 100002_DEST_PATH_IMAGE037
Consists of:
Figure 618637DEST_PATH_IMAGE038
Figure 100002_DEST_PATH_IMAGE039
within the bandwidth
Figure 820949DEST_PATH_IMAGE040
Of the calibration signal
Figure 100002_DEST_PATH_IMAGE041
Obtaining group delay error
Figure 463283DEST_PATH_IMAGE042
Consists of:
Figure 100002_DEST_PATH_IMAGE043
Figure 583553DEST_PATH_IMAGE033
Figure 551509DEST_PATH_IMAGE044
；
step three, using the array element 0 as a reference to obtain a plurality of group delay errors, and calculating the minimum value of the plurality of group delay errors
Figure 100002_DEST_PATH_IMAGE045
Adding the reverse value of the time delay correction value to the group delay error of each array element to obtain a group delay calibration value of each array element, and performing integer time delay calibration and decimal time delay calibration on each array element by using the group delay calibration value to finish group delay calibration of each array element; the integer time delay calibration is performed by taking the period as the period
Figure 116482DEST_PATH_IMAGE046
Is used as a reference, and the array element n receives the calibration data
Figure 155982DEST_PATH_IMAGE047
Buffering in RAM, when reading calibration data, taking RAM address 0 as initial address; obtaining an integer time delay calibration multiple according to the group time delay calibration value of the array element n, reading the initial address of the calibration data of the array element, moving the addresses of the integer time delay calibration multiple from the address 0 to finish the array element integer time delay calibration, and finishing the integer time delay calibration of all the array elements in the same way, namely finishing the integer time delay calibration;
the decimal time delay calibration takes the period as
Figure 286749DEST_PATH_IMAGE046
Dividing a reference period into N parts by taking the reference clock as a reference, calculating filter coefficients, and correspondingly generating N groups of coefficients; obtaining filter coefficient group number corresponding to decimal time delay through group time delay calibration value
Figure 425607DEST_PATH_IMAGE048
At the beginning of calibration, calibration data is received
Figure 477876DEST_PATH_IMAGE047
Accessing a filter, and loading a filter coefficient corresponding to the decimal time delay into the filter to finish decimal time delay calibration;
step four, after completing the group delay calibration, taking the array element 0 after completing the group delay calibration as a reference to obtain the phase error of each array element after completing the group delay calibration
Figure DEST_PATH_IMAGE049
Value according to
Figure 55488DEST_PATH_IMAGE049
And compensating the phase of each array element by the value to finish phase calibration.
A phased array antenna beam control device comprises a phased array antenna, a data processing module, an array element fault detection module, a power supply control device, a beam control device, a power detection device, a data storage device, an alarm device and an emergency array element calling device; the array element fault detection module, the power supply control device, the wave beam control device, the power detection device, the data storage device, the alarm device and the emergency array element calling device are respectively connected with the data processing module, and the emergency array element calling device is also connected with the phased array antenna;
the array element fault detection module is used for detecting the connectivity of the phased array antenna array element;
the wave beam control device is used for controlling the phased array antenna to enable the wave beam of the phased array antenna to point to a preset angle;
the power detection device is used for acquiring the transmitting power;
the emergency array element calling device is used for calling dormant emergency array elements.
The invention has the beneficial effects that: the invention has autonomous capability for monitoring and processing faults of the phased array antenna, can distinguish different array element faults, adopts different processing measures for different faults, ensures the normal use of the phased array antenna and improves the adaptability to the faults of the phased array antenna.
Drawings
FIG. 1 is a flow chart of a phased array antenna beam control method;
fig. 2 is a schematic diagram of a phased array antenna beam steering apparatus.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1, a phased array antenna beam control method includes the following steps:
firstly, performing starting fault detection and isolation on a phased array antenna; carrying out fault detection on all array elements in the phased array antenna in the starting process, wherein the fault detection comprises the steps of carrying out connectivity test on all the array elements when the phased array antenna is started, carrying out temperature detection on the array elements passing the test, and if the temperature rise coefficient of the array elements is within the set starting time length
Figure 306341DEST_PATH_IMAGE001
Within the range of the set temperature rise coefficient threshold value, carrying out power detection, otherwise, the array element is a type of fault array element; if the array element power detection is passed, the array element is a normal array element, the normal array element enters a standby state, otherwise, the array element is a second type of fault array element;
step two, performing power detection on the first-class fault array elements, taking the first-class fault array elements passing the power detection as emergency array elements, dividing the failed array elements into second-class fault array elements, and performing offline on the second-class fault array elements;
step three, performing phase measurement and calibration on the normal array elements and the emergency array elements which enter the standby state, so that the phases of all the array elements are kept consistent, and meanwhile, the total emission power of the array elements is obtained;
after the phase calibration of each array element is completed, the emergent array elements are dormant, and the wave beams are controlled through the normal array elements;
and step five, when the beam transmitting power requirement is greater than the total transmitting power of the normal array elements, calling the emergency array elements to supplement power, and completing beam transmitting.
Further, the temperature rise coefficient
Figure 819362DEST_PATH_IMAGE001
Calculated using the following formula:
the starting time period T comprises a temperature rising period
Figure 155665DEST_PATH_IMAGE002
And temperature stabilization period
Figure 536968DEST_PATH_IMAGE003
The array element temperature ready coefficient is as follows:
Figure 642327DEST_PATH_IMAGE004
rate of rise of temperature of array elements
Figure 326249DEST_PATH_IMAGE005
Comprises the following steps:
Figure 884270DEST_PATH_IMAGE006
therein
Figure 741367DEST_PATH_IMAGE007
Is the temperature data of the array element after the starting time length T,
Figure 265015DEST_PATH_IMAGE008
is the temperature and temperature rise coefficient of the array element at the start
Figure 182155DEST_PATH_IMAGE001
Comprises the following steps:
Figure 430734DEST_PATH_IMAGE009
。
further, the array element power detection includes the following processes:
inputting a test signal, detecting the output power of the array element, carrying out deviation calculation on the output power of the array element and the rated output power to obtain a deviation value, and if the deviation value is within a set deviation threshold range, the power detection of the array element is passed.
Further, the phase measurement and calibration of the normal array elements and the emergency array elements entering the standby state are performed to keep the phases of the array elements consistent, and the method comprises the following steps:
the method for measuring and calibrating the phases of the normal array elements and the emergency array elements which enter the standby state to keep the phases of the array elements consistent comprises the following steps:
step one, setting a calibration signal
Figure 91522DEST_PATH_IMAGE010
After array element 0, a signal is obtained
Figure 640315DEST_PATH_IMAGE011
Collecting the signal
Figure 56253DEST_PATH_IMAGE011
Sample points, obtaining the phase of array element 0 through fast Fourier transform
Figure 792128DEST_PATH_IMAGE012
(ii) a Obtaining the phase of any array element n except the array element 0 by the same method
Figure 991028DEST_PATH_IMAGE013
(ii) a In which the calibration signal
Figure 659907DEST_PATH_IMAGE014
The following formula is adopted:
Figure 246746DEST_PATH_IMAGE015
wherein: omega is the signal frequency; theta is the signal phase; a is a signal amplitude value, and the amplitude value A is kept unchanged;
after passing array element 0, the signal
Figure 266655DEST_PATH_IMAGE014
Become into
Figure 206929DEST_PATH_IMAGE050
：
Figure DEST_PATH_IMAGE051
Wherein
Figure 323790DEST_PATH_IMAGE018
For the array element 0 group delay error,
Figure 19213DEST_PATH_IMAGE019
the local oscillation phase error is array element 0;
signals of array element 0
Figure 995259DEST_PATH_IMAGE020
Sample points, obtaining local oscillation phase of array element 0 by fast Fourier transform
Figure 739224DEST_PATH_IMAGE021
：
Figure 648275DEST_PATH_IMAGE052
Similarly, the local oscillation phase of the array element n is:
Figure 809872DEST_PATH_IMAGE053
，
wherein
Figure 804373DEST_PATH_IMAGE024
For the delay error of the n groups of array elements,
Figure 86450DEST_PATH_IMAGE025
n local oscillation phase errors of array elements; in the formula
Figure DEST_PATH_IMAGE054
To represent
Figure 850007DEST_PATH_IMAGE055
The real part of,
Figure 949550DEST_PATH_IMAGE056
To represent
Figure 369030DEST_PATH_IMAGE055
An imaginary part of (d);
step two, under the conditions of clock homology, local oscillator synchronization and acquisition synchronization, the phase difference of the array element 0 and the array element n is obtained by taking the array element 0 as a reference
Figure 251535DEST_PATH_IMAGE029
Obtaining group delay error
Figure 869598DEST_PATH_IMAGE030
(ii) a The phase difference adopts the following formula:
Figure 140042DEST_PATH_IMAGE031
Figure DEST_PATH_IMAGE057
the group delay error is:
Figure 46819DEST_PATH_IMAGE033
the local oscillator phase error is:
Figure 733015DEST_PATH_IMAGE034
the method comprises the following specific steps:
first, the
Figure 533481DEST_PATH_IMAGE035
Of the calibration signal
Figure 646930DEST_PATH_IMAGE036
To obtain the local oscillator phase error
Figure 572161DEST_PATH_IMAGE037
Consists of:
Figure 999731DEST_PATH_IMAGE058
Figure DEST_PATH_IMAGE059
within the bandwidth
Figure 421747DEST_PATH_IMAGE060
Of the calibration signal
Figure DEST_PATH_IMAGE061
Obtaining group delay error
Figure 174940DEST_PATH_IMAGE042
Consists of:
Figure 853046DEST_PATH_IMAGE062
Figure 943362DEST_PATH_IMAGE033
Figure DEST_PATH_IMAGE063
；
step three, using the array element 0 as a reference to obtain a plurality of group delay errors, and calculating the minimum value of the plurality of group delay errors
Figure 593786DEST_PATH_IMAGE045
Adding the reverse value of the time delay correction value to the group delay error of each array element to obtain a group delay calibration value of each array element, and performing integer time delay calibration and decimal time delay calibration on each array element by using the group delay calibration value to finish group delay calibration of each array element; the integer time delay calibration is performed by taking the period as the period
Figure 49038DEST_PATH_IMAGE046
Is used as a reference, and the array element n receives the calibration data
Figure 214440DEST_PATH_IMAGE064
Buffering in RAM, when reading calibration data, taking RAM address 0 as initial address; obtaining an integer time delay calibration multiple according to the group time delay calibration value of the array element n, reading the initial address of the calibration data of the array element, moving the addresses of the integer time delay calibration multiple from the address 0 to finish the array element integer time delay calibration, and finishing the integer time delay calibration of all the array elements in the same way, namely finishing the integer time delay calibration;
the decimal time delay calibration takes the period as
Figure 108447DEST_PATH_IMAGE046
Dividing a reference period into N parts by taking the reference clock as a reference, calculating filter coefficients, and correspondingly generating N groups of coefficients; obtaining filter coefficient group number corresponding to decimal time delay through group time delay calibration value
Figure 410115DEST_PATH_IMAGE048
At the beginning of calibration, calibration data is received
Figure 239531DEST_PATH_IMAGE064
Accessing a filter, and loading a filter coefficient corresponding to the decimal time delay into the filter to finish decimal time delay calibration;
step four, after completing the group delay calibration, taking the array element 0 after completing the group delay calibration as a reference to obtain the phase error of each array element after completing the group delay calibration
Figure 626650DEST_PATH_IMAGE049
Value according to
Figure 996451DEST_PATH_IMAGE049
Compensating the phase of each array element by value to finish phase calibration; the method comprises the steps of obtaining the phase error of the array element after the group delay calibration by taking the array element 0 after the group delay calibration as a reference
Figure 480522DEST_PATH_IMAGE049
Compensating for phase compensation for each array element
Figure DEST_PATH_IMAGE065
The received signals of the array elements are:
Figure 746418DEST_PATH_IMAGE066
phase compensation
Figure 620833DEST_PATH_IMAGE049
After that, the reception signal becomes:
Figure DEST_PATH_IMAGE067
according to the euler formula:
Figure 892196DEST_PATH_IMAGE068
by generating
Figure 106139DEST_PATH_IMAGE065
Is/are as follows
Figure 74095DEST_PATH_IMAGE069
Signal sum
Figure DEST_PATH_IMAGE070
And multiplying the signal by the received signal to realize local oscillator phase calibration.
The integer time delay calibration multiple is as follows: the group delay calibration value of the array element n is
Figure 763703DEST_PATH_IMAGE071
Integral time delay calibration multiple
Figure DEST_PATH_IMAGE072
Comprises the following steps:
Figure 678569DEST_PATH_IMAGE073
wherein the fix function is a bit truncation rounding function;
then the integer time delay calibration value
Figure 74915DEST_PATH_IMAGE074
Comprises the following steps:
Figure DEST_PATH_IMAGE075
when the calibration is started, moving the integer time delay calibration multiple from the starting address
Figure 807248DEST_PATH_IMAGE072
An address which is a new initial address of an array element n and completes integer time delay calibration;
the number N of the filter coefficient groups is as follows:
Figure 390676DEST_PATH_IMAGE076
therein
Figure DEST_PATH_IMAGE077
For the accuracy of the fractional time delay calibration,
Figure 109233DEST_PATH_IMAGE046
is a reference clock period;
integer time delay calibration value obtained according to group time delay calibration
Figure 422403DEST_PATH_IMAGE074
Filter coefficient group number corresponding to decimal time delay
Figure 997741DEST_PATH_IMAGE078
Comprises the following steps:
Figure 271727DEST_PATH_IMAGE079
wherein the round function is a rounding function;
decimal time delay calibration value
Figure DEST_PATH_IMAGE080
Comprises the following steps:
Figure 420074DEST_PATH_IMAGE081
the received calibration data
Figure 259854DEST_PATH_IMAGE064
Access the filter, load the
Figure 6093DEST_PATH_IMAGE078
And (4) the coefficients of the group are input into a filter to finish decimal time delay calibration.
A phased array antenna beam control device comprises a phased array antenna, a data processing module, an array element fault detection module, a power supply control device, a beam control device, a power detection device, a data storage device, an alarm device and an emergency array element calling device; the array element fault detection module, the power supply control device, the wave beam control device, the power detection device, the data storage device, the alarm device and the emergency array element calling device are respectively connected with the data processing module, and the emergency array element calling device is also connected with the phased array antenna;
the array element fault detection module is used for detecting the connectivity of the phased array antenna array element;
the wave beam control device is used for controlling the phased array antenna to enable the wave beam of the phased array antenna to point to a preset angle;
the power detection device is used for acquiring the transmitting power;
the emergency array element calling device is used for calling dormant emergency array elements.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (5)

1. A phased array antenna beam steering method, comprising the steps of:
firstly, performing starting fault detection and isolation on a phased array antenna; carrying out fault detection on all array elements in the phased array antenna in the starting process, wherein the fault detection comprises the steps of carrying out connectivity test on all the array elements when the phased array antenna is started, carrying out temperature detection on the array elements passing the test, and if the temperature rise coefficient of the array elements is within the set starting time length
Figure 238384DEST_PATH_IMAGE001
Within the range of the set temperature rise coefficient threshold value, carrying out power detection, otherwise, the array element is a type of fault array element; if the array element power detection is passed, the array element is a normal array element, the normal array element enters a standby state, otherwise, the array element is a second type of fault array element;
step two, performing power detection on the first-class fault array elements, taking the first-class fault array elements passing the power detection as emergency array elements, dividing the failed array elements into second-class fault array elements, and performing offline on the second-class fault array elements;
step three, performing phase measurement and calibration on the normal array elements and the emergency array elements which enter the standby state, so that the phases of all the array elements are kept consistent, and meanwhile, the total emission power of the array elements is obtained;
after the phase calibration of each array element is completed, the emergent array elements are dormant, and the wave beams are controlled through the normal array elements;
and step five, when the beam transmitting power requirement is greater than the total transmitting power of the normal array elements, calling the emergency array elements to supplement power, and completing beam transmitting.
2. A phased array antenna beam steering method according to claim 1, characterised in that said temperature rise coefficient
Figure 421104DEST_PATH_IMAGE001
Calculated using the following formula:
the starting time period T comprises a temperature rising period
Figure DEST_PATH_IMAGE002
And temperature stabilization period
Figure 794317DEST_PATH_IMAGE003
The array element temperature ready coefficient is as follows:
Figure DEST_PATH_IMAGE004
rate of rise of temperature of array elements
Figure 392788DEST_PATH_IMAGE005
Comprises the following steps:
Figure DEST_PATH_IMAGE006
therein
Figure DEST_PATH_IMAGE007
Is the temperature data of the array element after the starting time length T,
Figure DEST_PATH_IMAGE008
is the temperature and temperature rise coefficient of the array element at the start
Figure 768012DEST_PATH_IMAGE001
Comprises the following steps:
Figure DEST_PATH_IMAGE009
。
3. a method as claimed in claim 1, wherein the detecting of the power of the array elements comprises the following steps:
inputting a test signal, detecting the output power of the array element, carrying out deviation calculation on the output power of the array element and the rated output power to obtain a deviation value, and if the deviation value is within a set deviation threshold range, the power detection of the array element is passed.
4. The method for controlling the phased array antenna beam according to claim 1, wherein the phase measurement and calibration are performed on the normal array element and the emergency array element which enter the standby state, so that the phases of the array elements are consistent, comprising the following steps:
step one, setting a calibration signal
Figure DEST_PATH_IMAGE010
After array element 0, a signal is obtained
Figure 183950DEST_PATH_IMAGE011
Collecting the signal
Figure 716563DEST_PATH_IMAGE011
Sample points, obtaining the phase of array element 0 through fast Fourier transform
Figure DEST_PATH_IMAGE012
(ii) a Obtaining the phase of any array element n except the array element 0 by the same method
Figure 384305DEST_PATH_IMAGE013
(ii) a In which the calibration signal
Figure DEST_PATH_IMAGE014
The following formula is adopted:
Figure DEST_PATH_IMAGE015
wherein: omega is the signal frequency; theta is the signal phase; a is a signal amplitude value, and the amplitude value A is kept unchanged;
after passing array element 0, the signal
Figure 646659DEST_PATH_IMAGE014
Become into
Figure DEST_PATH_IMAGE016
：
Figure DEST_PATH_IMAGE017
Wherein
Figure DEST_PATH_IMAGE018
For the array element 0 group delay error,
Figure DEST_PATH_IMAGE019
the local oscillation phase error is array element 0;
signals of array element 0
Figure DEST_PATH_IMAGE020
Sample points, obtaining local oscillation phase of array element 0 by fast Fourier transform
Figure DEST_PATH_IMAGE021
：
Figure DEST_PATH_IMAGE022
Similarly, the local oscillation phase of the array element n is:
Figure DEST_PATH_IMAGE023
，
wherein
Figure DEST_PATH_IMAGE024
For array element n group delayThe error is a measure of the error,
Figure 469383DEST_PATH_IMAGE025
n local oscillation phase errors of array elements; in the formula
Figure DEST_PATH_IMAGE026
To represent
Figure DEST_PATH_IMAGE027
The real part of,
Figure DEST_PATH_IMAGE028
To represent
Figure 82767DEST_PATH_IMAGE027
An imaginary part of (d);
step two, under the conditions of clock homology, local oscillator synchronization and acquisition synchronization, the phase difference of the array element 0 and the array element n is obtained by taking the array element 0 as a reference
Figure DEST_PATH_IMAGE029
Obtaining group delay error
Figure DEST_PATH_IMAGE030
(ii) a The phase difference adopts the following formula:
Figure DEST_PATH_IMAGE031
Figure DEST_PATH_IMAGE032
the group delay error is:
Figure 882096DEST_PATH_IMAGE033
the local oscillator phase error is:
Figure DEST_PATH_IMAGE034
the method comprises the following specific steps:
first, the
Figure 874323DEST_PATH_IMAGE035
Of the calibration signal
Figure DEST_PATH_IMAGE036
To obtain the local oscillator phase error
Figure DEST_PATH_IMAGE037
Consists of:
Figure DEST_PATH_IMAGE039
Figure DEST_PATH_IMAGE040
within the bandwidth
Figure DEST_PATH_IMAGE041
Of the calibration signal
Figure DEST_PATH_IMAGE042
Obtaining group delay error
Figure DEST_PATH_IMAGE043
Consists of:
Figure DEST_PATH_IMAGE044
Figure 514436DEST_PATH_IMAGE033
Figure DEST_PATH_IMAGE045
；
step three, using the array element 0 as a reference to obtain a plurality of group delay errors, and calculating the minimum value of the plurality of group delay errors
Figure DEST_PATH_IMAGE046
Adding the reverse value of the time delay correction value to the group delay error of each array element to obtain a group delay calibration value of each array element, and performing integer time delay calibration and decimal time delay calibration on each array element by using the group delay calibration value to finish group delay calibration of each array element; the integer time delay calibration is performed by taking the period as the period
Figure DEST_PATH_IMAGE047
Is used as a reference, and the array element n receives the calibration data
Figure DEST_PATH_IMAGE048
Buffering in RAM, when reading calibration data, taking RAM address 0 as initial address; obtaining an integer time delay calibration multiple according to the group time delay calibration value of the array element n, reading the initial address of the calibration data of the array element, moving the addresses of the integer time delay calibration multiple from the address 0 to finish the array element integer time delay calibration, and finishing the integer time delay calibration of all the array elements in the same way, namely finishing the integer time delay calibration;
the decimal time delay calibration takes the period as
Figure 851876DEST_PATH_IMAGE047
Dividing a reference period into N parts by taking the reference clock as a reference, calculating filter coefficients, and correspondingly generating N groups of coefficients; obtaining filter coefficient group number corresponding to decimal time delay through group time delay calibration value
Figure 760926DEST_PATH_IMAGE049
At the beginning of calibration, will be receivedCalibration data
Figure 96093DEST_PATH_IMAGE048
Accessing a filter, and loading a filter coefficient corresponding to the decimal time delay into the filter to finish decimal time delay calibration;
step four, after completing the group delay calibration, taking the array element 0 after completing the group delay calibration as a reference to obtain the phase error of each array element after completing the group delay calibration
Figure DEST_PATH_IMAGE050
Value according to
Figure 293856DEST_PATH_IMAGE050
And compensating the phase of each array element by the value to finish phase calibration.
5. A phased array antenna beam control device applying the phased array antenna beam control method of any one of claims 1 to 4, comprising a phased array antenna, and characterized by comprising a data processing module, an array element fault detection module, a power supply control device, a beam control device, a power detection device, a data storage device, an alarm device and an emergency array element calling device; the array element fault detection module, the power supply control device, the wave beam control device, the power detection device, the data storage device, the alarm device and the emergency array element calling device are respectively connected with the data processing module, and the emergency array element calling device is also connected with the phased array antenna;
the array element fault detection module is used for detecting the connectivity of the phased array antenna array element;
the wave beam control device is used for controlling the phased array antenna to enable the wave beam of the phased array antenna to point to a preset angle;
the power detection device is used for acquiring the transmitting power;
the emergency array element calling device is used for calling dormant emergency array elements.
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