CN114497997B - Dual-polarized calibration antenna with high polarization isolation and calibration method and device thereof - Google Patents

Dual-polarized calibration antenna with high polarization isolation and calibration method and device thereof Download PDF

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CN114497997B
CN114497997B CN202111658377.2A CN202111658377A CN114497997B CN 114497997 B CN114497997 B CN 114497997B CN 202111658377 A CN202111658377 A CN 202111658377A CN 114497997 B CN114497997 B CN 114497997B
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CN114497997A (en
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张卫杰
梁志恒
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Tsinghua University
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/24—Polarising devices; Polarisation filters 
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract

The application relates to the technical field of polarized radar calibration, in particular to a dual-polarized calibration antenna with high polarization isolation and a calibration method and device thereof, wherein the antenna comprises: the input end of the radar echo signal simulator is connected with the dual-polarized radar so as to receive a vertical polarization transmission signal and a horizontal polarization transmission signal of the dual-polarized radar and respectively generate a vertical polarization echo signal and a horizontal polarization echo signal based on the vertical polarization transmission signal and the horizontal polarization transmission signal; the first output end of the radar echo signal simulator is connected with the first ternary antenna group, and the second output end of the radar echo signal simulator is connected with the second ternary antenna group, so that the vertical polarization echo signal and the horizontal polarization echo signal are respectively output to the first ternary antenna group and the second ternary antenna group after being subjected to amplitude and phase processing. Therefore, the problem of inaccurate measurement of polarization isolation caused by the adoption of a dual-polarized antenna is solved, and the dual-polarized antenna has the advantages of being accurate in calibration and convenient to use.

Description

Dual-polarized calibration antenna with high polarization isolation and calibration method and device thereof
Technical Field
The present invention relates to the field of polarized radar calibration technologies, and in particular, to a dual polarized calibration antenna with high polarization isolation, and a calibration method, a device, an electronic device, and a storage medium thereof.
Background
A dual polarized radar is a radar with the transmission of pulses of vertical and horizontal polarization and the reception of echoes of vertical and horizontal polarization. It records both the amplitude variations of the coherent echo signals and the phase variations (phase differences) between the echoes of the different polarizations, including the backward echo scatter amplitudes and phase differences of the radar resolution cells for each polarization state.
Polarization isolation is the isolation of different polarizations, in particular the isolation of two cross polarizations, vertical and horizontal, or the mutual coupling. Polarization isolation is an important index of a polarization radar, and the method for determining the polarization isolation is generally as follows: and transmitting a signal with specified polarization at a test site meeting the requirements, simultaneously receiving signals with the same polarization and signals with cross polarization by the dual-polarized radar, and determining the coupling degree between two polarization channels of the dual-polarized radar through amplitude and phase comparison analysis of the two polarization components.
In the process of measuring the performance of the dual-polarized radar, strict requirements are placed on the polarization isolation. When the polarization isolation is poor, the coupling between channels is serious, and the dual-polarized radar cannot obtain accurate target polarization information. In the measurement of dual polarized radar, a dual polarized antenna is generally used as an echo antenna. The polarization isolation of a single dual-polarized antenna is limited and is generally not more than 30dB, and the requirement of dual-polarized radar index test cannot be met.
Disclosure of Invention
The application provides a dual-polarized calibration antenna with high polarization isolation, a calibration method and device thereof, electronic equipment and storage medium, and aims to solve the problem of inaccurate measurement of polarization isolation caused by the adoption of a dual-polarized antenna.
An embodiment of a first aspect of the present application provides a dual polarized calibration antenna with high polarization isolation, including: the system comprises a first ternary antenna group, a second ternary antenna group and a radar echo signal simulator.
The input end of the radar echo signal simulator is connected with the dual-polarized radar so as to receive a vertical polarization emission signal and a horizontal polarization emission signal of the dual-polarized radar and respectively generate a vertical polarization echo signal and a horizontal polarization echo signal based on the vertical polarization emission signal and the horizontal polarization emission signal;
the first output end of the radar echo signal simulator is connected with the first ternary antenna group, and the second output end of the radar echo signal simulator is connected with the second ternary antenna group, so that the vertical polarization echo signal and the horizontal polarization echo signal are respectively output to the first ternary antenna group and the second ternary antenna group after being subjected to amplitude and phase processing.
Optionally, in one embodiment of the present application, the first ternary antenna group includes a plurality of vertically polarized antennas, and the second ternary antenna group includes a plurality of horizontally polarized antennas, wherein the plurality of vertically polarized antennas and the plurality of horizontally polarized antennas are all distributed on concentric circles.
Optionally, in one embodiment of the present application, the plurality of vertically polarized antennas includes first to third vertically polarized antennas, and the plurality of horizontally polarized antennas includes first to third horizontally polarized antennas, wherein a connection line between the first to third vertically polarized antennas and the first to third horizontally polarized antenna positions forms an equilateral triangle.
Optionally, in an embodiment of the present application, the radar echo signal simulator is further configured to perform amplitude weighting and phase weighting processing on three paths of vertical polarized echo signals and three paths of horizontal polarized echo signals, respectively, so as to make centers of the vertical polarized signal composite beams of the first to third vertical polarized antennas and the horizontal polarized signal composite beams of the first to third horizontal polarized antennas coincide.
Optionally, in one embodiment of the present application, the center angles of the vertical polarized signal synthesis beams of the first to third vertical polarized antennas and the horizontal polarized signal synthesis beams of the first to third horizontal polarized antennas are:
Figure BDA0003449007040000021
Figure BDA0003449007040000022
wherein ,
Figure BDA0003449007040000023
for the azimuth angle of the synthesized beam, θ is the elevation angle of the synthesized beam, A 1 、A 2 and A3 The amplitudes of the three antenna signals, +.>
Figure BDA0003449007040000024
and />
Figure BDA0003449007040000025
Azimuth angles theta of three antennas respectively 1 、θ 2 and θ3 Pitch angles of the three antennas respectively.
An embodiment of a second aspect of the present application provides a calibration method for a dual polarized calibration antenna with high polarization isolation, including the following steps:
generating a first target echo signal according to a vertical polarization emission signal of the dual-polarized radar, obtaining a first horizontal polarization echo signal and a first vertical polarization echo signal according to the first target echo signal, and comparing the amplitude and the phase of the first horizontal polarization echo signal and the first vertical polarization echo signal to obtain the vertical polarization isolation of the dual-polarized radar at any working frequency point;
generating a second target echo signal according to the horizontal polarization emission signal of the dual-polarized radar, obtaining a second horizontal polarization echo signal and a second vertical polarization echo signal according to the second target echo signal, and comparing the amplitude and the phase of the second horizontal polarization echo signal and the second vertical polarization echo signal to obtain the horizontal polarization isolation of the dual-polarized radar at any working frequency point; and
and calibrating the dual-polarized radar according to the vertical polarization isolation and the horizontal polarization isolation of the dual-polarized radar at all working frequency points.
An embodiment of a third aspect of the present application provides a calibration device for a dual polarized calibration antenna with high polarization isolation, including:
the vertical polarization signal processing module is used for generating a first target echo signal according to a vertical polarization transmitting signal of the dual-polarized radar, obtaining a first horizontal polarization echo signal and a first vertical polarization echo signal according to the first target echo signal, and comparing the amplitude and the phase of the first horizontal polarization echo signal and the first vertical polarization echo signal to obtain the vertical polarization isolation degree of the dual-polarized radar at any working frequency point;
the horizontal polarization signal processing module is used for generating a second target echo signal according to the horizontal polarization emission signal of the dual-polarized radar, obtaining a second horizontal polarization echo signal and a second vertical polarization echo signal according to the second target echo signal, and comparing the amplitude and the phase of the second horizontal polarization echo signal and the second vertical polarization echo signal to obtain the horizontal polarization isolation degree of the dual-polarized radar at any working frequency point; and
and the calibration module is used for calibrating the dual-polarized radar according to the vertical polarization isolation and the horizontal polarization isolation of the dual-polarized radar at all working frequency points.
An embodiment of a fourth aspect of the present application provides an electronic device, including: the calibration method comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the program to execute the calibration method of the dual-polarized calibration antenna with high polarization isolation as described in the embodiment.
An embodiment of a fifth aspect of the present application provides a computer-readable storage medium having stored thereon a computer program that is executed by a processor to perform the calibration method of a dual polarized calibration antenna of high polarization isolation as described in the above embodiments.
The input end of the radar echo signal simulator is connected with the dual-polarized radar so as to receive a vertical polarization transmitting signal and a horizontal polarization transmitting signal of the dual-polarized radar, and a vertical polarization echo signal and a horizontal polarization echo signal are respectively generated based on the vertical polarization transmitting signal and the horizontal polarization transmitting signal; the first output end of the radar echo signal simulator is connected with the first ternary antenna group, and the second output end of the radar echo signal simulator is connected with the second ternary antenna group, so that the vertical polarization echo signal and the horizontal polarization echo signal are respectively output to the first ternary antenna group and the second ternary antenna group after being subjected to amplitude and phase processing. Therefore, the space wave beam is formed by combining the two ternary antennas, the method has the advantages of being accurate in calibration and convenient to use, and the problems that the polarization isolation degree of a single dual-polarized antenna is limited, the dual-polarized radar has high sensitivity, the single dual-polarized antenna is adopted to play back radar echo signals, and the polarization isolation degree of the dual-polarized radar cannot be effectively measured are solved.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a dual polarized calibration antenna with high polarization isolation according to an embodiment of the present application;
fig. 2 is a schematic diagram of a specific structure of a dual-polarized calibration antenna with high polarization isolation according to an embodiment of the present application;
fig. 3 is a schematic diagram of dual polarized calibration antenna connection with high polarization isolation according to an embodiment of the present application;
fig. 4 is a flowchart of a calibration method of a dual polarized calibration antenna with high polarization isolation according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a darkroom test system for dual polarized radar polarization calibration according to an embodiment of the present application;
FIG. 6 is a schematic diagram of amplitude and phase control of dual polarized radar calibrated echo signals according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a calibration device of a dual-polarized calibration antenna with high polarization isolation according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.
The following describes a dual polarized calibration antenna with high polarization isolation and a calibration method, a device, an electronic apparatus and a storage medium thereof according to embodiments of the present application with reference to the accompanying drawings. The utility model provides a problem that the polarization isolation degree that adopts a dual polarized antenna to arouse mentioned in the above-mentioned background art center measures inaccurately, this application provides a dual polarized calibration antenna of high polarization isolation degree, combines into space wave beam through two ternary antennas, has the advantage of calibration accuracy, convenient to use, has solved because the polarization isolation degree of single dual polarized antenna itself is limited, and dual polarized radar has sensitivity height, adopts single dual polarized antenna playback radar echo signal, can't effectively measure the polarization isolation degree of dual polarized radar's problem.
Specifically, fig. 1 is a schematic structural diagram of a dual-polarized calibration antenna with high polarization isolation according to an embodiment of the present application.
As shown in fig. 1, the dual polarized calibration antenna 10 with high polarization isolation includes: first ternary antenna group 100, second ternary antenna group 200, and radar return signal simulator 300.
The input end of the radar echo signal simulator 300 is connected with the dual-polarized radar to receive a vertical polarization transmission signal and a horizontal polarization transmission signal of the dual-polarized radar and respectively generate a vertical polarization echo signal and a horizontal polarization echo signal based on the vertical polarization transmission signal and the horizontal polarization transmission signal;
the first output end of the radar echo signal simulator 300 is connected to the first ternary antenna group 100, and the second output end of the radar echo signal simulator is connected to the second ternary antenna group 200, so as to perform amplitude and phase processing on the vertical polarized echo signal and the horizontal polarized echo signal, and then output the processed vertical polarized echo signal and the horizontal polarized echo signal to the first ternary antenna group 100 and the second ternary antenna group 200, respectively.
Optionally, in one embodiment of the present application, the first ternary antenna group includes a plurality of vertically polarized antennas, and the second ternary antenna group includes a plurality of horizontally polarized antennas, wherein the plurality of vertically polarized antennas and the plurality of horizontally polarized antennas are all distributed on concentric circles.
As shown in fig. 2, the antenna comprises six monopoles, namely, an antenna 1-an antenna 6, and all the monopoles are distributed on a concentric circular mounting surface. Six antennas are divided into two groups of first ternary antenna groups and second ternary antenna groups, wherein one group of antennas adopts vertical polarization, the other group of antennas adopts horizontal polarization, and each single polarized antenna is respectively connected with one output end of the radar echo signal simulator.
Optionally, in one embodiment of the present application, the plurality of vertically polarized antennas includes first to third vertically polarized antennas, and the plurality of horizontally polarized antennas includes first to third horizontally polarized antennas, wherein a connection line between the first to third vertically polarized antennas and the first to third horizontally polarized antenna positions forms an equilateral triangle.
As shown in fig. 2 and 3, the vertically polarized antenna includes an antenna 2, an antenna 4, and an antenna 6, and the horizontally polarized antenna includes an antenna 1, an antenna 3, and an antenna 5. The connection lines between the positions of the antenna 2, the antenna 4 and the antenna 6 form an equilateral triangle, and the connection lines between the positions of the antenna 1, the antenna 3 and the antenna 5 form an equilateral triangle.
Optionally, in an embodiment of the present application, the radar echo signal simulator is further configured to perform amplitude weighting and phase weighting processing on the three paths of vertical polarized echo signals and the three paths of horizontal polarized echo signals, respectively, so as to make centers of the vertical polarized signal composite beams of the first to third vertical polarized antennas and the horizontal polarized signal composite beams of the first to third horizontal polarized antennas coincide.
Optionally, in one embodiment of the present application, the vertical polarized signal synthesis beam of the first to third vertical polarized antennas and the horizontal polarized signal synthesis beam of the first to third horizontal polarized antennas have a center angle of:
Figure BDA0003449007040000051
Figure BDA0003449007040000052
wherein ,
Figure BDA0003449007040000053
for the azimuth angle of the synthesized beam, θ is the elevation angle of the synthesized beam, A 1 、A 2 and A3 The amplitudes of the three antenna signals, +.>
Figure BDA0003449007040000054
and />
Figure BDA0003449007040000055
Azimuth angles theta of three antennas respectively 1 、θ 2 and θ3 Pitch angles of the three antennas respectively. />
As shown in fig. 2 and fig. 3, the two groups of antennas are respectively connected with 3 vertical polarization signal outputs and 3 horizontal polarization signal outputs of the radar echo signal simulator, and the consistency of the 3 vertical polarization signal synthesized beams and the 3 horizontal polarization signal synthesized beams is ensured by controlling the amplitude and the phase of the output signals of the radar echo signal simulator, so that a dual-polarized signal with high isolation is generated, and the dual-polarized radar is accurately calibrated.
According to the dual-polarized calibration antenna with high polarization isolation, two ternary antennas are combined into a space beam, so that the dual-polarized calibration antenna has the advantages of being accurate in calibration and convenient to use, and the problems that the polarization isolation of a single dual-polarized antenna is limited, the dual-polarized radar has high sensitivity, a single dual-polarized antenna is adopted for playing back radar echo signals, and the polarization isolation of the dual-polarized radar cannot be effectively measured are solved.
Next, a calibration method of a dual polarized calibration antenna with high polarization isolation according to an embodiment of the present application will be described with reference to the accompanying drawings.
Fig. 4 is a flowchart of a calibration method of a dual-polarized calibration antenna with high polarization isolation according to an embodiment of the present application.
As shown in fig. 4, the calibration method of the dual polarized calibration antenna with high polarization isolation comprises the following steps:
step S101, a first target echo signal is generated according to a vertical polarization emission signal of the dual-polarized radar, a first horizontal polarization echo signal and a first vertical polarization echo signal are obtained according to the first target echo signal, and the amplitude and the phase of the first horizontal polarization echo signal and the first vertical polarization echo signal are compared to obtain the vertical polarization isolation degree of the dual-polarized radar at any working frequency point.
Step S102, a second target echo signal is generated according to the horizontal polarization emission signal of the dual-polarized radar, a second horizontal polarization echo signal and a second vertical polarization echo signal are obtained according to the second target echo signal, and the amplitude and the phase of the second horizontal polarization echo signal and the second vertical polarization echo signal are compared to obtain the horizontal polarization isolation of the dual-polarized radar at any working frequency point.
And step S103, calibrating the dual-polarized radar according to the vertical polarization isolation and the horizontal polarization isolation of the dual-polarized radar at all working frequency points.
Specifically, the dual polarized radar calibration operation may be performed as follows:
in the first step, 3 vertical polarization echo signal cables and 3 horizontal polarization echo signal cables of the radar echo signal simulator are connected to the vertical polarization ternary antenna group and the horizontal polarization ternary antenna group of the dual polarization echo array antenna, as shown in fig. 5.
Secondly, erecting the tested dual-polarized radar in a test field according to the use requirement, aligning the phase center of a radar antenna with the phase center of a dual-polarized echo array antenna, and calibrating the distance R between the radar antenna and the dual-polarized echo array antenna to meet far-field conditions to finish calibration of the apparent angle position of a radiation signal, the consistency calibration of the amplitude of the radiation signal of each path, the calibration of the polarization plane of the radiation signal, and calibration of phase shifters and attenuators of each branch of an array feed system.
Third, the vertical polarization transmission signal and the horizontal polarization transmission signal of the dual polarized radar are connected to a radar echo signal simulator, and the latter generates dual polarized radar echo signals according to the former signals, and the dual polarized radar is calibrated and measured, as shown in fig. 5.
And fourthly, starting up the dual-polarized radar to work, outputting a vertical polarization emission signal and a horizontal polarization emission signal, and generating a dual-polarized echo signal by a radar echo signal simulator according to set parameters, wherein the dual-polarized echo signal comprises 3 paths of vertical polarization echo signals and 3 paths of horizontal polarization echo signals.
And fifthly, respectively carrying out amplitude weighting and phase weighting on the generated 3 paths of vertical polarization echo signals and 3 paths of horizontal polarization echo signals, and ensuring that the centers of the vertical polarization echo synthesized signals and the centers of the horizontal polarization echo synthesized signals are consistent as shown in fig. 6. Under far field conditions, the resultant center angle is calculated using the following equation.
Figure BDA0003449007040000071
Figure BDA0003449007040000072
And sixthly, the radar echo signal simulator generates a vertical polarization signal according to the dual-polarization radar transmitting signal, the dual-polarization radar receives the target echo signal, the processing results of horizontal polarization and vertical polarization are obtained through signal processing, and the vertical polarization isolation of the dual-polarization radar under the set working frequency point is obtained by comparing the amplitude and the phase of the two results.
Seventh, the radar echo signal simulator generates a horizontal polarization signal according to the dual-polarized radar transmitting signal, the dual-polarized radar receives the target echo signal, the processing results of horizontal polarization and vertical polarization are obtained through signal processing, and the horizontal polarization isolation of the dual-polarized radar under the set working frequency point is obtained by comparing the amplitude and the phase of the two results.
And eighth step, changing the working frequency points of the dual-polarized radar, and repeating the sixth step and the seventh step to finish the polarization isolation measurement of all the working frequency points of the dual-polarized radar.
According to the calibration method of the dual-polarized calibration antenna with high polarization isolation, which is provided by the embodiment of the application, the two ternary antennas are combined into the space beam, so that the calibration method has the advantages of accuracy in calibration and convenience in use, and the problems that the polarization isolation of a single dual-polarized antenna is limited, the dual-polarized radar has high sensitivity, the single dual-polarized antenna is adopted to play back radar echo signals, and the polarization isolation of the dual-polarized radar cannot be effectively measured are solved.
Next, a calibration device of a dual polarized calibration antenna with high polarization isolation according to an embodiment of the present application will be described with reference to the accompanying drawings.
Fig. 7 is a schematic structural diagram of a calibration device of a dual-polarized calibration antenna with high polarization isolation according to an embodiment of the present application.
As shown in fig. 7, the calibration device 20 of the dual polarized calibration antenna with high polarization isolation includes: a vertical polarization signal processing module 701, a horizontal polarization signal processing module 702, and a calibration module 703.
The vertical polarization signal processing module 701 is configured to generate a first target echo signal according to a vertical polarization transmission signal of the dual-polarized radar, obtain a first horizontal polarization echo signal and a first vertical polarization echo signal according to the first target echo signal, and compare the amplitudes and phases of the first horizontal polarization echo signal and the first vertical polarization echo signal to obtain a vertical polarization isolation of the dual-polarized radar at any operating frequency point.
The horizontal polarization signal processing module 702 is configured to generate a second target echo signal according to a horizontal polarization transmission signal of the dual-polarized radar, obtain a second horizontal polarization echo signal and a second vertical polarization echo signal according to the second target echo signal, and compare the amplitude and the phase of the second horizontal polarization echo signal and the second vertical polarization echo signal to obtain the horizontal polarization isolation of the dual-polarized radar at any operating frequency point.
And the calibration module 703 is used for calibrating the dual-polarized radar according to the vertical polarization isolation and the horizontal polarization isolation of the dual-polarized radar at all working frequency points.
It should be noted that the foregoing explanation of the embodiment of the dual-polarized calibration antenna with high polarization isolation is also applicable to the calibration method and apparatus of the dual-polarized calibration antenna with high polarization isolation in this embodiment, and will not be repeated here.
According to the calibrating device of the dual-polarized calibrating antenna with high polarization isolation, which is provided by the embodiment of the application, the two ternary antennas are combined into the space beam, so that the calibrating device has the advantages of accuracy in calibration and convenience in use, and the problems that the polarization isolation of a single dual-polarized antenna is limited, the dual-polarized radar has high sensitivity, the single dual-polarized antenna is adopted to replay radar echo signals, and the polarization isolation of the dual-polarized radar cannot be effectively measured are solved.
Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device may include:
a memory 801, a processor 802, and a computer program stored on the memory 801 and executable on the processor 802.
The processor 802 implements the calibration method of the dual polarized calibration antenna with high polarization isolation provided in the above embodiment when executing the program.
Further, the electronic device further includes:
a communication interface 803 for communication between the memory 801 and the processor 802.
A memory 801 for storing a computer program executable on the processor 802.
The memory 801 may include high-speed RAM memory or may further include non-volatile memory (non-volatile memory), such as at least one magnetic disk memory.
If the memory 801, the processor 802, and the communication interface 803 are implemented independently, the communication interface 803, the memory 801, and the processor 802 may be connected to each other through a bus and perform communication with each other. The bus may be an industry standard architecture (Industry Standard Architecture, abbreviated ISA) bus, an external device interconnect (Peripheral Component, abbreviated PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, abbreviated EISA) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 8, but not only one bus or one type of bus.
Alternatively, in a specific implementation, if the memory 801, the processor 802, and the communication interface 803 are integrated on a chip, the memory 801, the processor 802, and the communication interface 803 may communicate with each other through internal interfaces.
The processor 802 may be a central processing unit (Central Processing Unit, abbreviated as CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, abbreviated as ASIC), or one or more integrated circuits configured to implement embodiments of the present application.
The present embodiment also provides a computer-readable storage medium having stored thereon a computer program, characterized in that the program, when executed by a processor, implements the calibration method of a dual polarized calibration antenna with high polarization isolation as above.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "N" is at least two, such as two, three, etc., unless explicitly defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.

Claims (8)

1. The calibration method of the dual-polarized calibration antenna with high polarization isolation is characterized by comprising the following steps of:
s1, connecting 3 vertical polarization echo signal cables and 3 horizontal polarization echo signal cables of a radar echo signal simulator to a vertical polarization ternary antenna group and a horizontal polarization ternary antenna group of a dual-polarization echo array antenna;
s2, erecting the measured dual-polarized radar in a test field according to the use requirement, aligning the phase center of a radar antenna with the phase center of a dual-polarized echo array antenna, and calibrating the distance R between the radar antenna and the dual-polarized echo array antenna to meet far-field conditions to finish calibration of the apparent angle position of a radiation signal, the consistency calibration of the amplitude of the radiation signal of each path, the calibration of the polarization plane of the radiation signal, and calibration of each branch phase shifter and attenuator of an array feed system;
s3, connecting a vertical polarization emission signal and a horizontal polarization emission signal of the dual-polarized radar to a radar echo signal simulator, generating a dual-polarized radar echo signal according to the signals of the vertical polarization emission signal and the horizontal polarization emission signal of the dual-polarized radar, and calibrating and measuring the dual-polarized radar;
s4, outputting a vertical polarization emission signal and a horizontal polarization emission signal by the dual-polarized radar, and generating dual-polarized echo signals comprising 3 paths of vertical polarization echo signals and 3 paths of horizontal polarization echo signals by the radar echo signal simulator according to set parameters;
s5, respectively carrying out amplitude weighting and phase weighting on the generated 3 paths of vertical polarization echo signals and 3 paths of horizontal polarization echo signals to enable the centers of the vertical polarization echo synthesized signals and the centers of the horizontal polarization echo synthesized signals to be consistent;
s6, generating a first target echo signal according to a vertical polarization emission signal of the dual-polarized radar, obtaining a first horizontal polarization echo signal and a first vertical polarization echo signal according to the first target echo signal, and comparing the amplitude and the phase of the first horizontal polarization echo signal and the first vertical polarization echo signal to obtain the vertical polarization isolation of the dual-polarized radar at any working frequency point;
s7, generating a second target echo signal according to the horizontal polarization emission signal of the dual-polarized radar, obtaining a second horizontal polarization echo signal and a second vertical polarization echo signal according to the second target echo signal, and comparing the amplitude and the phase of the second horizontal polarization echo signal and the second vertical polarization echo signal to obtain the horizontal polarization isolation of the dual-polarized radar at any working frequency point;
s8, changing working frequency points of the dual-polarized radar, and repeating the steps S6 and S7 to finish polarization isolation measurement of all the working frequency points of the dual-polarized radar;
s9, calibrating the dual-polarized radar according to the vertical polarization isolation and the horizontal polarization isolation of the dual-polarized radar at all working frequency points.
2. A dual polarized calibration antenna of high polarization isolation for performing the calibration method of the dual polarized calibration antenna of high polarization isolation as defined in claim 1, comprising: the system comprises a first ternary antenna group, a second ternary antenna group and a radar echo signal simulator;
the input end of the radar echo signal simulator is connected with the dual-polarized radar so as to receive a vertical polarization emission signal and a horizontal polarization emission signal of the dual-polarized radar and respectively generate a vertical polarization echo signal and a horizontal polarization echo signal based on the vertical polarization emission signal and the horizontal polarization emission signal;
the first output end of the radar echo signal simulator is connected with the first ternary antenna group, and the second output end of the radar echo signal simulator is connected with the second ternary antenna group so as to respectively output the vertical polarized echo signal and the horizontal polarized echo signal to the first ternary antenna group and the second ternary antenna group after amplitude and phase processing;
the first ternary antenna group comprises three vertical polarized antennas, and the second ternary antenna group comprises three horizontal polarized antennas, wherein the three vertical polarized antennas and the three horizontal polarized antennas are distributed on concentric circles; the vertical polarized antennas and the horizontal polarized antennas are sequentially arranged at intervals, and an included angle between the vertical polarized antennas and connecting lines adjacent to the centers of the concentric circles, where the horizontal polarized antennas face the centers of the concentric circles, is 60 degrees.
3. The dual polarized calibration antenna of claim 2, wherein the plurality of vertically polarized antennas comprises first through third vertically polarized antennas and the plurality of horizontally polarized antennas comprises first through third horizontally polarized antennas, wherein a connection line between the first through third vertically polarized antennas and the first through third horizontally polarized antenna positions forms an equilateral triangle.
4. The dual polarized calibration antenna of claim 3, wherein said radar echo signal simulator is further configured to perform an amplitude weighting and a phase weighting process on three vertical polarized echo signals and three horizontal polarized echo signals, respectively, so as to align the centers of the vertical polarized signal composite beam of said first to third vertical polarized antennas and the horizontal polarized signal composite beam of said first to third horizontal polarized antennas.
5. The dual polarized aligned antenna of high polarization isolation according to any one of claims 2 to 4 wherein the vertical polarized signal combining beams of the first to third vertical polarized antennas and the horizontal polarized signal combining beams of the first to third horizontal polarized antennas have a center angle of:
Figure FDA0004024333280000021
Figure FDA0004024333280000022
wherein ,
Figure FDA0004024333280000023
for the azimuth angle of the synthesized beam, θ is the elevation angle of the synthesized beam, A 1 、A 2 and A3 The amplitudes of the three antenna signals, +.>
Figure FDA0004024333280000024
and />
Figure FDA0004024333280000025
Azimuth angles theta of three antennas respectively 1 、θ 2 and θ3 Pitch angles of the three antennas respectively.
6. A calibration device for a dual polarized calibration antenna using high polarization isolation according to any one of claims 2 to 5, comprising:
the vertical polarization signal processing module is used for generating a first target echo signal according to a vertical polarization transmitting signal of the dual-polarized radar, obtaining a first horizontal polarization echo signal and a first vertical polarization echo signal according to the first target echo signal, and comparing the amplitude and the phase of the first horizontal polarization echo signal and the first vertical polarization echo signal to obtain the vertical polarization isolation degree of the dual-polarized radar at any working frequency point;
the horizontal polarization signal processing module is used for generating a second target echo signal according to the horizontal polarization emission signal of the dual-polarized radar, obtaining a second horizontal polarization echo signal and a second vertical polarization echo signal according to the second target echo signal, and comparing the amplitude and the phase of the second horizontal polarization echo signal and the second vertical polarization echo signal to obtain the horizontal polarization isolation degree of the dual-polarized radar at any working frequency point; and
and the calibration module is used for calibrating the dual-polarized radar according to the vertical polarization isolation and the horizontal polarization isolation of the dual-polarized radar at all working frequency points.
7. An electronic device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the method of calibrating a dual polarized calibration antenna of high polarization isolation as defined in claim 1.
8. A computer-readable storage medium having stored thereon a computer program, characterized in that the program is executed by a processor for implementing the calibration method of a dual polarized calibration antenna of high polarization isolation according to claim 1.
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