CN111044802A - Phased array antenna unit amplitude and phase balancing method and device based on aperture field - Google Patents
Phased array antenna unit amplitude and phase balancing method and device based on aperture field Download PDFInfo
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Abstract
The application discloses a phased array antenna unit amplitude and phase balancing method based on an aperture field, which comprises the following steps. The first step is as follows: and moving the test probe and/or the phased array antenna to be tested to perform near field scanning test on the fixed caliber. The second step is that: and calculating the amplitude and phase data of the aperture surface of the antenna to be measured. The third step: and calculating the amplitude and phase results of the aperture surfaces of each unit of the antenna to be tested, and obtaining a unit amplitude matching leveling table. The fourth step: writing the unit amplitude matching leveling table into the phased array antenna, and judging whether the phased array antenna unit amplitude matching leveling is finished or not; if the unit breadth matching is finished, the whole method is finished, and a final unit breadth matching leveling table is obtained; and if not, repeating the first step to the fourth step, writing a new element amplitude balancing table into the element amplitude balancing table written before the phased array antenna covers, and repeating the steps until the phased array antenna element amplitude balancing is completed. The method and the device can shorten the test time of the amplitude and phase balancing work of the phased array antenna unit and improve the test efficiency.
Description
Technical Field
The application relates to an amplitude and phase balancing device and method between antenna unit channels of a phased array antenna.
Background
The phased array antenna needs to complete debugging and testing of all antenna units before leaving a factory, wherein an important work is to complete amplitude and phase balancing work among antenna unit channels of the phased array antenna, which is referred to as phased array antenna unit amplitude and phase balancing for short.
The existing phased array antenna unit amplitude and phase balancing method mainly comprises a manual plugging and unplugging balancing mode, an automatic control phased array power-on and power-off wireless calibration mode and the like. The efficiency of the manual plugging mode is too low, and the manual operation precision cannot be guaranteed. The problem of manual operation is solved in the automatic control phased array power-on and power-off wireless calibration mode, but the universality cannot be improved due to the fact that various different interfaces exist at present.
Disclosure of Invention
The technical problem that this application will be solved provides a phased array antenna element amplitude and phase balancing unit of high efficiency, high accuracy, high-pass usefulness. To this end, the present application also provides a corresponding method for amplitude-phase balancing of phased array antenna elements.
In order to solve the technical problem, the application provides a phased array antenna unit amplitude and phase balancing method based on an aperture surface field, which comprises the following steps. The first step is as follows: moving the test probe and/or the phased array antenna to be tested to enable the distance between the test probe and the phased array antenna to be 4-10 wavelengths; the antenna to be tested is in a full array power-up state, the test probe takes a wavelength less than or equal to one half as scanning stepping, and near-field scanning test is carried out on the fixed aperture. The second step is that: and calculating the amplitude and phase data of the aperture surface of the antenna to be measured according to the amplitude and phase data of the near-field scanning surface. The third step: and calculating the amplitude and phase results of the aperture surface of each unit of the antenna to be measured according to the amplitude and phase data of the aperture surface of the antenna to be measured, and obtaining a unit amplitude matching leveling table. The fourth step: writing the unit amplitude matching leveling table into the phased array antenna, and judging whether the phased array antenna unit amplitude matching leveling is finished or not; if the unit breadth matching is finished, the whole method is finished, and a final unit breadth matching leveling table is obtained; and if not, repeating the first step to the fourth step, writing a new element amplitude balancing table into the element amplitude balancing table written before the phased array antenna covers, and repeating the steps until the phased array antenna element amplitude balancing is completed.
The method can shorten the test time of the amplitude phase balancing work of the phased array antenna unit, improve the test efficiency, reduce the test error, reduce the number of testers and simultaneously improve the amplitude phase balancing precision of the phased array antenna unit.
Further, in the first step, the distance between the test probe and the phased array antenna to be tested is 4 to 5 wavelengths. This is a preferred range of distance values.
Further, in the first step, the amplitude and phase data obtained by the near-field scanning surface are shown in formula one.
Wherein the content of the first and second substances,
represents the electric field value at any point in space, and ^ integral represents double integral, the area of double integral is from minus infinity to plus infinity,
the spectrum of the light is a plane wave spectrum,
in the form of a wave vector, the wave vector,
representing an arbitrary point in space, kxIs a wave vector in the x direction, kyIs the y-direction wave vector. The amplitude and phase data of the near-field scanning surface are expressed in a mathematical form, so that subsequent calculation is facilitated.
Further, in the first step, the plane spectrum is subjected to inverse transformation as shown in formula two.
Wherein X represents the X-axis position of the rectangular coordinate system, and Y represents the Y-axis position of the rectangular coordinate system. This is a transformation of equation one to facilitate subsequent calculations.
Further, in the second step, the data of the amplitude and the phase of the aperture surface of the antenna to be measured are shown in formula three.
Wherein the content of the first and second substances,
the electric field value of the aperture surface of the antenna to be measured is shown,
representing the wavenumber domain vector electric field. The amplitude and phase data of the aperture surface of the antenna to be measured are expressed in a mathematical form, so that subsequent calculation is facilitated.
Further, in the third step, the data of the amplitude and the phase of the aperture surface of each unit of the antenna to be measured are shown in formula four.
Wherein the content of the first and second substances,
the electric field value of the aperture surface of the mth antenna unit of the antenna to be measured is represented, I represents the number of sampling points in the X direction, and J represents the number of sampling points in the Y direction. The data is the amplitude and phase data of the aperture surface of each unit of the antenna to be measured which is expressed in a mathematical form.
The application also provides a phased array antenna unit amplitude and phase balancing device based on the aperture surface field, which comprises a near field scanning test module, an antenna aperture surface operation module, a unit aperture surface operation module and a balancing iteration module; the near field scanning test module is used for enabling the distance d between the test probe and the phased array antenna to be tested to be 4-10 wavelengths by moving the test probe and/or the phased array antenna to be tested; enabling the antenna to be tested to be in a full-array power-up state, and performing near-field scanning test on the fixed aperture by using the test probe as scanning stepping with the wavelength less than or equal to one half; the antenna aperture surface operation module is used for calculating the amplitude and phase data of the antenna aperture surface to be measured according to the amplitude and phase data of the near-field scanning surface; the unit aperture surface operation module is used for calculating the amplitude and phase results of each unit aperture surface of the antenna to be measured according to the amplitude and phase data of the aperture surface of the antenna to be measured, and obtaining a unit amplitude matching leveling table by using algorithm processing; the trim iteration module is used for writing the unit amplitude matching flat table into the phased array antenna and judging whether the phased array antenna unit amplitude matching is finished or not; if the unit breadth matching is finished, the whole method is finished, and a final unit breadth matching leveling table is obtained; if not, repeating the processes of near-field scanning, antenna aperture surface operation and unit aperture surface operation, writing a new unit amplitude balancing table into the unit amplitude balancing table written before the phased array antenna covers, and repeating the steps until the phased array antenna unit amplitude balancing is completed.
The device can shorten the test time of the amplitude phase balancing work of the phased array antenna unit, improve the test efficiency, reduce the test error, reduce the number of testers and simultaneously improve the amplitude phase balancing precision of the phased array antenna unit.
Further, the near field scanning test module comprises a phased array antenna, a probe, a vector network analyzer, a real-time controller and a control computer; the phased array antenna receives or transmits radio frequency signals by different antenna units; the phased array antenna is connected with external equipment through an antenna interface; the external equipment comprises a single ground detection unit and an antenna end radio frequency box; the single ground detection unit is also connected with a real-time controller; the single ground detection unit, the control computer and the vector network analyzer work in a coordinated mode to control the phased array antenna and achieve receiving or transmitting working states of different antenna units; the antenna end radio frequency box is used for selecting a channel for a radio frequency signal to enter the phased array antenna; the probe comprises a plurality of probes, and radio frequency signals are transmitted by one or more probes or received by one or more probes; the probe end radio frequency box is used for selecting a channel for a radio frequency signal to enter the probe; the vector network analyzer provides an excitation signal for one of the phased array antenna or the probe, and also receives a signal of the other one of the phased array antenna or the probe to perform amplitude-phase test; the real-time controller is used for controlling the single ground detection unit, the antenna end radio frequency box and the probe end radio frequency box; the control computer performs the functions of storing, processing and analyzing data. This is a specific implementation of the near field scan test module.
Furthermore, the phased array antenna to be tested is assembled on the antenna bracket, and the horizontal guide rail driver is controlled by the real-time controller to enable the antenna bracket to move along the horizontal guide rail, so that the distance between the phased array antenna and the probe is adjusted. This is the first implementation used to adjust the distance between the phased array antenna and the probe.
Further, the probe is mounted on a gantry, and a gantry driver is controlled by a real-time controller to move or rotate the gantry in three dimensions and also to adjust the distance between the phased array antenna and the probe. This is a second implementation for adjusting the distance between the phased array antenna and the probe.
Further, the number of the probes is 4 to 8. This is a preferred range of values for the number of probes.
Further, in the antenna receiving operation mode, the phased array antenna is used as a receiving antenna; the probes act as transmitting antennas, and test signals are transmitted by one or more probes. In the antenna transmission working mode, the phased array antenna is used as a transmitting antenna; the probe acts as a receiving antenna, and radio frequency signals are received by one or more probes. This shows that the present application is applicable to both modes of operation of the phased array antenna.
The method has the technical effects that the phased array antenna unit amplitude and phase balancing work achieves the advantages of being intelligent, high in universality, high in precision and high in efficiency.
Drawings
Fig. 1 is a schematic diagram of a structure of an amplitude and phase balancing system of a phased array antenna unit, which corresponds to an antenna receiving operation mode.
Fig. 2 is a schematic structural diagram of a phased array antenna element amplitude balancing system, which corresponds to an antenna transmission operation mode.
Fig. 3 is a schematic flow chart of the method for trimming the amplitude of the phased array antenna unit based on the aperture field.
Figure 4 is a schematic view of a near field scan surface.
Fig. 5 is a schematic view of an aperture plane of an antenna to be measured.
Fig. 6 is a schematic diagram of aperture surfaces of each unit of the antenna to be tested.
Fig. 7 is a schematic structural diagram of the device for trimming the amplitude of the phased array antenna unit based on the aperture surface field.
The reference numbers in the figures illustrate: 100 is a phased array antenna unit amplitude phase balancing system; 110 is a phased array antenna; 111 is an antenna bracket; 112 is an antenna interface; 114 is a stand-alone ground detection unit; 116 is an antenna end rf box; 118 is a horizontal rail drive; 120 is a probe, 121 is a scanning frame; 126 is a probe end radio frequency box; 128 is a gantry driver; 130 is a vector network analyzer, 140 is a real-time controller; 150 is a control computer; 10 is a near field scanning test module; 20 is an antenna aperture surface operation module; 30 is a unit aperture surface operation module; and 40 is a trim iteration module.
Detailed Description
Referring to fig. 1, the system is used for the amplitude-phase balancing system of the phased array antenna unit, and is used for the balancing test in the antenna receiving operation mode. The phased array antenna element amplitude balancing system 100 includes a phased array antenna 110, a probe 120, a vector network analyzer 130, a real-time controller 140, and a control computer 150.
The phased array antenna 110, also referred to as a wavefront system, in the first embodiment serves as a receiving antenna for receiving radio frequency signals from different antenna elements. The phased array antenna 110 is mounted on an antenna mount 111. The antenna interface 112 is a hardware connection interface of the phased array antenna 110 to external devices including a stand-alone ground detection unit 114 and an antenna-side rf box 116. The single ground detection unit 114, also known as a wave control system, is used to control the phased array antenna 110. The single ground detection unit 114 is further connected to the real-time controller 140, so that the single ground detection unit 114, the control computer 150 and the vector network analyzer 130 work in coordination to control the phased array antenna 110, and realize the receiving operation states of different antenna units. The antenna end rf box 116 is used to select the path for the rf signal into the phased array antenna 110. The antenna end rf box 116 is also connected to a vector network analyzer 130 and a real time controller 140. The horizontal rail driver 118 is controlled by the real-time controller 140 to move the antenna support 111 along the horizontal rail, thereby adjusting the distance d between the phased array antenna 110 and the probe 120, and performing the fixed-point test of different distances.
The probe 120 comprises a plurality of probes, for example 4 to 8 probes, preferably 4 probes. In one embodiment, the probe 120 serves as a transmitting antenna, and one or more probes transmit radio frequency signals. The probe 120 is mounted on a gantry 121. The probe end rf box 126 is used to select the path of the rf signal into the probe 120. The probe end rf box 126 is also connected to a vector network analyzer 130. The gantry drive 128 is controlled by the real-time controller 140 to move or rotate the gantry 121 in three dimensions to adjust the position of one or more probes.
The vector network analyzer 130 provides an excitation signal for the test probe 120, and the excitation signal is directly input into the probe 120 through the probe end rf box 126 to transmit the signal. The vector network analyzer 130 also performs an amplitude phase test on the signals received by the phased array antenna 110 through the antenna end rf box 116.
The real-time controller 140 is used to control the stand-alone ground detection unit 114, the antenna end rf box 116, the probe end rf box 126, the horizontal rail drive 118, and the gantry drive 128.
The control computer 150 performs the storage, processing and analysis functions of the data.
Referring to fig. 2, the system is used for the antenna transmission mode of the phased array antenna element amplitude balancing system. Fig. 2 differs from fig. 1 in the following points. The phased array antenna 110 acts as a transmit antenna in fig. 2; the probe head 120 acts as a receiving antenna and one or more probe heads are used for testing. The vector network analyzer 130 provides an excitation signal for the phased array antenna 110, controls the computer 150, the vector network analyzer 130 and the single ground detection unit 114 to work in a coordinated manner, controls the phased array antenna 110, realizes the transmitting working states of different antenna units, and receives a signal through the probe 120 and sends the signal to the vector network analyzer 130 for amplitude-phase testing.
Referring to fig. 3, the method for trimming the amplitude of the phased array antenna unit based on the aperture field includes the following steps.
First step S10: as shown in fig. 4, the test probe and/or the phased array antenna to be tested are moved to a distance d of 4 to 10 wavelengths, preferably 4 to 5 wavelengths. The antenna to be tested is in a full array power-up state, the test probe takes a wavelength less than or equal to one half as scanning stepping, and near-field scanning test is carried out on the fixed aperture.
Second step S20: as shown in fig. 5, according to the near-field scanning test result, the amplitude and phase data of the scanning surface are processed by an algorithm to reversely derive the amplitude and phase data of the aperture surface of the antenna to be tested. The aperture surface of the antenna to be measured refers to the aperture surface of the whole phased array antenna. The calculation of this step is prior art in the art and will not be described further.
Third step S30: as shown in fig. 6, the amplitude and phase results of the aperture surface of each unit of the antenna to be measured are inversely derived from the amplitude and phase data of the aperture surface of the antenna to be measured through algorithm processing, and an element amplitude matching leveling table is obtained through algorithm processing. The element aperture plane refers to the aperture plane of each antenna element in the phased array antenna.
Fourth step S40: and writing the unit amplitude matching leveling table into the phased array antenna, and judging whether the phased array antenna unit amplitude matching leveling is finished. If so, the entire method is complete and a final cell width match leveling table is obtained. And if not, repeating the first step to the fourth step, and writing a new element amplitude matching table into the element amplitude matching table written before the phased array antenna is covered. Typically, the entire method requires multiple iterations to complete.
The method is simultaneously suitable for the trim test under the working modes of antenna receiving and antenna transmitting.
According to the planar wave expansion, in a passive lossless space, electromagnetic waves at any position point can be represented by vector superposition of planar wave spectrums in all directions, as shown in formula I. The first formula is the amplitude and phase data obtained from the near field scan plane in the first step S10.
Wherein the content of the first and second substances,
represents the electric field value at any point in space, and ^ integral represents double integral, the area of double integral is from minus infinity to plus infinity,
the spectrum of the light is a plane wave spectrum,
in the form of a wave vector, the wave vector,
representing an arbitrary point in space, kxIs a wave vector in the x direction, kyIs the y-direction wave vector.
The plane spectrum is subjected to inverse transformation as shown in formula II.
Wherein X represents the X-axis position of the rectangular coordinate system, and Y represents the Y-axis position of the rectangular coordinate system.
Therefore, the electric field value of the aperture surface of the antenna to be tested can be obtained through the near field test as shown in formula three. The third formula is the amplitude and phase data of the aperture surface of the antenna to be measured in the second step S20.
Wherein the content of the first and second substances,
the electric field value of the aperture surface of the antenna to be measured is shown,
representing the wavenumber domain vector electric field.
And further changing to obtain the electric field value of the aperture surface of each unit of the antenna to be measured, as shown in formula IV. The fourth formula is the amplitude and phase data of the aperture plane of each element of the antenna to be measured in the third step S30.
Wherein the content of the first and second substances,
the electric field value of the aperture surface of the mth antenna unit of the antenna to be measured is represented, I represents the number of sampling points in the X direction, and J represents the number of sampling points in the Y direction.
Referring to fig. 7, the apparatus for balancing the element amplitude of a phased array antenna based on an aperture field includes a near field scanning test module 10, an antenna aperture plane operation module 20, an element aperture plane operation module 30, and a balancing iteration module 40.
The near field scanning test module 10 is used for enabling the antenna to be tested to be in a full array power-up state, and the test probe performs near field scanning test on the fixed aperture by taking the wavelength less than or equal to one half as scanning stepping. The test probe and/or the phased array antenna to be tested are moved to a distance d of 4 to 10 wavelengths, preferably 4 to 5 wavelengths.
The near field scan test module 10 is shown in fig. 1 and 2, for example. The phased array antenna 110 to be tested is mounted on the antenna support 111, and the horizontal rail driver 118 is controlled by the real-time controller 140 to move the antenna support 111 along the horizontal rail, thereby adjusting the distance d between the phased array antenna 110 and the probe 120. The probe 120 is mounted on the gantry 121, and the gantry drive 128 is controlled by the real-time controller 140 to move or rotate the gantry 121 in three dimensions, and also to adjust the distance d between the phased array antenna 110 and the probe 120. The phased array antenna 110, the probe 120, the vector network analyzer 130, the real-time controller 140, and the control computer 150 cooperate to implement near field scan testing.
In the antenna receive mode of operation, the phased array antenna 110 under test acts as a receive antenna. The probe 120 acts as a transmitting antenna, with one or more probes transmitting radio frequency signals.
In the antenna transmit mode of operation, the phased array antenna 110 under test acts as a transmit antenna. The probe 120 acts as a receiving antenna and a single probe is used for testing.
The antenna aperture surface operation module 20 is configured to reversely deduce amplitude and phase data of the antenna aperture surface to be tested through algorithm processing according to the near field scanning test result and amplitude and phase data of the near field scanning surface. The aperture surface of the antenna to be measured refers to the aperture surface of the whole phased array antenna. The antenna aperture surface operation module 20 is executed by the control computer 150 in fig. 1 and 2, for example.
The unit aperture surface operation module 30 is used for reversely pushing out the amplitude and phase results of each unit aperture surface of the antenna to be measured through algorithm processing according to the amplitude and phase data of the aperture surface of the antenna to be measured, and obtaining a unit amplitude matching flat table through algorithm processing. The element aperture plane refers to the aperture plane of each antenna element in the phased array antenna. The unit aperture surface operation module 30 is executed by the control computer 150 in fig. 1 and 2, for example.
The trim iteration module 40 is configured to write the unit amplitude trim table into the phased array antenna, and determine whether the phased array antenna unit amplitude trim is completed. If so, the entire method is complete and a final cell width match leveling table is obtained. If not, repeating the processes of near-field scanning, antenna aperture surface operation and unit aperture surface operation, and writing a new unit amplitude matching table into the unit amplitude matching table written before the phased array antenna covers for judgment again. Iteration is usually required for completing the amplitude and phase balancing of the phased array antenna elements. The trim iteration module 40 is executed by the control computer 150 in fig. 1 and 2, for example.
The method and the device for the phase-array antenna unit amplitude and phase balancing based on the oral surface field acquire electric field data of 4-10 wavelength positions away from the phase-array antenna in a multi-probe mode, inversely calculate amplitude values of all antenna unit positions in the phase-array antenna, calculate out unbalanced unit amplitude and phase deviation, and adjust the unit amplitude values through a controller of the phase-array antenna to achieve the phase-array antenna unit amplitude and phase balancing effect.
Because the unit amplitude phase balancing work is carried out based on the normal working state of the phased array antenna, the precision of the amplitude phase value obtained by testing is higher than that of the existing balancing means; in addition, correlation control on the phased array antenna is not required in the test process, so that the method has the characteristic of universality; and because the mode of multiple probes is adopted for simultaneous sampling, the testing efficiency is greatly improved.
The above are merely preferred embodiments of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (12)
1. A phased array antenna unit amplitude and phase balancing method based on an aperture field is characterized by comprising the following steps:
the first step is as follows: moving the test probe and/or the phased array antenna to be tested to enable the distance between the test probe and the phased array antenna to be 4-10 wavelengths; the antenna to be tested is in a full-array power-up state, the test probe takes a wavelength less than or equal to one half as scanning stepping, and near-field scanning test is carried out on the fixed caliber;
the second step is that: calculating the amplitude and phase data of the aperture surface of the antenna to be measured according to the amplitude and phase data of the near-field scanning surface;
the third step: calculating the amplitude and phase results of the aperture surface of each unit of the antenna to be measured according to the amplitude and phase data of the aperture surface of the antenna to be measured, and obtaining a unit amplitude matching leveling table;
the fourth step: writing the unit amplitude matching leveling table into the phased array antenna, and judging whether the phased array antenna unit amplitude matching leveling is finished or not; if the unit breadth matching is finished, the whole method is finished, and a final unit breadth matching leveling table is obtained; and if not, repeating the first step to the fourth step, writing a new element amplitude balancing table into the element amplitude balancing table written before the phased array antenna covers, and repeating the steps until the phased array antenna element amplitude balancing is completed.
2. The method for phase-matching the element amplitudes of the phased array antenna based on the oral surface field as claimed in claim 1, wherein in the first step, the distance between the test probe and the phased array antenna to be tested is 4 to 5 wavelengths.
3. The method for trimming the amplitude and the phase of the phased array antenna unit based on the oral surface field as claimed in claim 1, wherein in the first step, the amplitude and the phase data obtained by scanning the surface in the near field are shown in formula one;
wherein the content of the first and second substances,
represents the electric field value at any point in space, and ^ integral represents double integral, the area of double integral is from minus infinity to plus infinity,
the spectrum of the light is a plane wave spectrum,
in the form of a wave vector, the wave vector,
representing an arbitrary point in space, kxIs a wave vector in the x direction, kyIs the y-direction wave vector.
4. The method for trimming the amplitude and phase of the phased array antenna unit based on the aperture surface field as claimed in claim 3, wherein in the first step, the plane wave spectrum is subjected to inverse transformation as shown in formula two;
wherein X represents the X-axis position of the rectangular coordinate system, and Y represents the Y-axis position of the rectangular coordinate system.
5. The method for balancing the amplitude and the phase of the phased array antenna unit based on the aperture surface field as claimed in claim 3, wherein in the second step, the data of the amplitude and the phase of the aperture surface of the antenna to be measured are shown in formula three;
wherein the content of the first and second substances,
the electric field value of the aperture surface of the antenna to be measured is shown,
representing the wavenumber domain vector electric field.
6. The method for balancing the amplitude and the phase of the phased array antenna unit based on the aperture surface field as claimed in claim 5, wherein in the third step, the amplitude and the phase data of the aperture surface of each unit of the antenna to be tested are shown in formula four;
wherein the content of the first and second substances,
the electric field value of the aperture surface of the mth antenna unit of the antenna to be measured is represented, I represents the number of sampling points in the X direction, and J represents the number of sampling points in the Y direction.
7. A phased array antenna unit amplitude and phase balancing device based on an aperture field is characterized by comprising a near field scanning test module, an antenna aperture surface operation module, a unit aperture surface operation module and a balancing iteration module;
the near field scanning test module is used for enabling the distance d between the test probe and the phased array antenna to be tested to be 4-10 wavelengths by moving the test probe and/or the phased array antenna to be tested; enabling the antenna to be tested to be in a full-array power-up state, and performing near-field scanning test on the fixed aperture by using the test probe as scanning stepping with the wavelength less than or equal to one half;
the antenna aperture surface operation module is used for calculating the amplitude and phase data of the antenna aperture surface to be measured according to the amplitude and phase data of the near-field scanning surface;
the unit aperture surface operation module is used for calculating the amplitude and phase results of each unit aperture surface of the antenna to be measured according to the amplitude and phase data of the aperture surface of the antenna to be measured, and obtaining a unit amplitude matching leveling table by using algorithm processing;
the trim iteration module is used for writing the unit amplitude matching flat table into the phased array antenna and judging whether the phased array antenna unit amplitude matching is finished or not; if the unit breadth matching is finished, the whole method is finished, and a final unit breadth matching leveling table is obtained; if not, repeating the processes of near-field scanning, antenna aperture surface operation and unit aperture surface operation, writing a new unit amplitude balancing table into the unit amplitude balancing table written before the phased array antenna covers, and repeating the steps until the phased array antenna unit amplitude balancing is completed.
8. The phased array antenna unit amplitude and phase balancing device based on the oral surface field as claimed in claim 7, wherein the near field scanning test module comprises a phased array antenna, a probe, a vector network analyzer, a real-time controller and a control computer;
the phased array antenna receives or transmits radio frequency signals by different antenna units; the phased array antenna is connected with external equipment through an antenna interface; the external equipment comprises a single ground detection unit and an antenna end radio frequency box; the single ground detection unit is also connected with a real-time controller; the single ground detection unit, the control computer and the vector network analyzer work in a coordinated mode to control the phased array antenna and achieve receiving or transmitting working states of different antenna units; the antenna end radio frequency box is used for selecting a channel for a radio frequency signal to enter the phased array antenna;
the probe comprises a plurality of probes, and radio frequency signals are transmitted by one or more probes or received by one or more probes; the probe end radio frequency box is used for selecting a channel for a radio frequency signal to enter the probe;
the vector network analyzer provides an excitation signal for one of the phased array antenna or the probe, and also receives a signal of the other one of the phased array antenna or the probe to perform amplitude-phase test;
the real-time controller is used for controlling the single ground detection unit, the antenna end radio frequency box and the probe end radio frequency box;
the control computer performs the functions of storing, processing and analyzing data.
9. The apparatus of claim 8, wherein the phased array antenna to be measured is mounted on an antenna support, and the horizontal rail driver is controlled by the real-time controller to move the antenna support along the horizontal rail to adjust the distance between the phased array antenna and the probe.
10. The apparatus of claim 8, wherein the probe is mounted on a gantry, and a gantry driver is controlled by the real-time controller to move or rotate the gantry in three dimensions and also to adjust the distance between the phased array antenna and the probe.
11. The apparatus of claim 8, wherein the number of probes is 4 to 8.
12. The apparatus of claim 8, wherein the phased array antenna is configured to operate as a receive antenna in an antenna receive mode; the probe is used as a transmitting antenna, and one or more probes transmit test signals;
in the antenna transmission working mode, the phased array antenna is used as a transmitting antenna; the probe acts as a receiving antenna, and radio frequency signals are received by one or more probes.
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| CN117233683B (en) * | 2023-11-14 | 2024-01-26 | 陕西拾贝通讯技术有限公司 | Calibration method for antenna plane near field acquisition data based on distance point cloud data |
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