CN113449439B - Design method, device and system of array antenna and storage medium - Google Patents
Design method, device and system of array antenna and storage medium Download PDFInfo
- Publication number
- CN113449439B CN113449439B CN202110994478.0A CN202110994478A CN113449439B CN 113449439 B CN113449439 B CN 113449439B CN 202110994478 A CN202110994478 A CN 202110994478A CN 113449439 B CN113449439 B CN 113449439B
- Authority
- CN
- China
- Prior art keywords
- unit
- array
- array antenna
- feed
- amplitude
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Abstract
The application provides a design method, equipment, a system and a storage medium of an array antenna. The method comprises the following steps: acquiring near-field amplitude-phase coefficients and array information of each unit of the array antenna under each frequency and/or each inclination angle; performing near-far field transformation by using the amplitude-phase coefficient and the array information, and outputting an array far-field directional diagram and a radiation performance test index; when the array far-field directional diagram and the radiation performance test index do not meet the design index requirement, changing the feed length of the feed network to adjust the feed additional phase of the unit; and performing near-far field transformation and index judgment again based on the adjusted feed additional phase until the design index requirement is met. The method and the device can reduce the frequency of far-field measurement and shorten the design period. And a virtual adjusting technology is introduced to achieve the effect of calculating the change of far-field radiation performance after changing the amplitude-phase coefficient in real time.
Description
Technical Field
The invention belongs to the field of array antennas, and particularly relates to a design method, equipment, a system and a storage medium of an array antenna.
Background
As shown in fig. 1, the conventional array antenna is designed as follows:
1. designing an array antenna according to indexes such as gain, beam width, sidelobe suppression and the like, and determining the number of units, unit spacing, amplitude and phase distribution of each unit and the like of the array antenna;
2. designing a feed network, and physically realizing the distribution of the amplitude and phase of each unit;
3. detecting the amplitude phase distribution of each unit, and if the amplitude phase distribution does not accord with the design value, returning to the design of the correction feed network;
4. and (4) testing the radiation performance of the whole machine, and if the radiation performance does not accord with the design value, returning to modify the array design until the radiation performance design index meets the design index requirement.
When designing an array antenna, the design is often performed at the center frequency. However, the array antenna usually works in a frequency band range, and the unit, transmission and distribution components for realizing the antenna are frequency-variable, so that the difference between the amplitude-phase test value and the design value in the working bandwidth is large. Therefore, in the development process of the array antenna, it is often necessary to repeatedly perform the test and adjust the design process according to the test result. These tests include measurements of the unit amplitude and phase distribution over the frequency band, and measurements of the far field radiation performance of the complete machine to determine whether the array antenna can meet the specification over the entire operating frequency band. The adjustment comprises adjustment of a feed network and adjustment of basic parameters of the array antenna. In practice, the distribution of the amplitude and phase of the test unit is relatively quick, but the performance of the array antenna is not reflected intuitively and accurately enough, and the test unit is generally only used in the initial design stage, and the radiation performance measurement in the far field still needs to be performed repeatedly to determine the radiation performance in the far field. And the radiation performance of the far-field test needs to be measured by a far-field measuring system or a multi-probe measuring system, so that the time consumption is long and the efficiency is low. Particularly, under the large trend of modern mobile communication broadband, the design difficulty of the array antenna is greatly improved, and the research and development period is prolonged. To shorten the development period, engineers are often relied on deeper design experience to reduce the number of repetitions and the development period.
Disclosure of Invention
Embodiments of the present invention provide a method, an apparatus, a system, and a storage medium for designing an array antenna, which can estimate a radiation performance of the array antenna according to an amplitude-phase coefficient, reduce the number of far-field measurements, and shorten a design period. And a virtual adjustment technology can be introduced to calculate the change problem of far-field radiation performance after the amplitude-phase coefficient is changed in real time.
In order to achieve the above object, an embodiment of the present invention provides a method for designing an array antenna, including:
acquiring near-field amplitude-phase coefficients and array information of each unit of the array antenna under each frequency and/or each inclination angle;
performing near-far field transformation by using the amplitude-phase coefficient and the array information, and outputting an array far-field directional diagram and a radiation performance test index;
when the array far-field directional diagram and the radiation performance test index do not meet the radiation performance design index requirement, changing the feed length of the feed network to adjust the feed additional phase of each unit;
and performing near-far field transformation and index judgment again based on the adjusted feed additional phase until the requirement of the radiation performance design index is met.
Optionally, the near-far field transform is performed using:
wherein the content of the first and second substances,
representing the far field direction function of the array,
is the first
The unit directional diagram of each unit cell is,
is the first
The amplitude-phase coefficient of each unit,
is shown as
The amplitude of the individual elements is such that,
is the first
The phase coefficient of each of the cells is,
in terms of the wave number, the number of waves,
is the wavelength of the center frequency and,
is the first
The additional phase of the feed of the individual elements,
in order to obtain a cell pitch,
is the pitch angle of the array antenna.
Optionally, the feeding additional phase of the cell is calculated according to:
wherein the content of the first and second substances,
in terms of the wave number, the number of waves,
is the wavelength of the center frequency and,
is the first
The additional phase of the feed of the individual elements,
is virtually connected in series to
The length of the feed line on each cell,
is the relative permittivity of the feed line insulating medium,
representing the antenna radiation distance in far field conditions.
Optionally, if the adjusted feeder length cannot meet the target design requirement, the basic feed network and/or the basic parameters of the array antenna are redesigned.
In order to achieve the above object, an embodiment of the present invention further provides a design apparatus for an array antenna, including:
the acquisition unit is used for acquiring near-field amplitude-phase coefficients and array information of each unit of the array antenna under each frequency and/or each inclination angle;
the transformation unit is used for performing near-far field transformation by using the amplitude-phase coefficient and the array information and outputting an array far-field directional diagram and a radiation performance test index;
the adjusting unit is used for changing the feed length of the feed network to adjust the feed additional phase of the unit when the array far-field directional diagram and the radiation performance design index do not meet the design index requirement;
and the transformation unit is also used for carrying out near-far field transformation and index judgment again based on the adjusted feeding additional phase until the requirement of a design index is met.
Optionally, the transformation unit performs near-far field transformation by using the following formula:
wherein the content of the first and second substances,
representing the far field direction function of the array,
is the first
The unit directional diagram of each unit cell is,
is the first
The amplitude-phase coefficient of each unit,
is shown as
The amplitude of the individual elements is such that,
is the first
The phase coefficient of each of the cells is,
in terms of the wave number, the number of waves,
is the wavelength of the center frequency and,
is the first
The additional phase of the feed of the individual elements,
in order to obtain a cell pitch,
is the pitch angle of the array antenna.
Optionally, the adjusting unit is configured to calculate a feeding additional phase of the unit according to the following formula:
wherein the content of the first and second substances,
in terms of the wave number, the number of waves,
is the wavelength of the center frequency and,
is the first
The additional phase of the feed of the cell,
is virtually connected in series to
The length of the feed line on each cell,
is the relative permittivity of the feed line insulating medium,
representing the antenna radiation distance in far field conditions.
Optionally, if the adjusted feeder length cannot meet the target design requirement, the basic feed network and/or the basic parameters of the array antenna are redesigned.
The embodiment of the invention also provides an array antenna design system, which comprises the array antenna design equipment, the array antenna, a vector network analyzer and a radio frequency probe;
the radio frequency probe is placed on the units of the array antenna and used for sampling the radiation near field of each unit of the antenna and transmitting the radiation near field back to the vector network analyzer;
and the vector network analyzer is connected with the radio frequency probe and the array antenna through a port and is used for measuring the amplitude-phase coefficient of the near field of each unit of the array antenna under each frequency and/or each inclination angle under the control of the equipment.
The embodiment of the present invention further provides a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, the computer-executable instructions are used to implement the above-mentioned design method for an array antenna.
The embodiment of the invention has the following beneficial effects:
1. the array directional diagram and the radiation performance test index can be directly obtained after the unit amplitude-phase coefficient is detected without far-field measurement;
2. array performance is evaluated based on directional diagrams and radiation performance test indexes, and the evaluation is more visual than the direct evaluation of amplitude and phase coefficients;
3. the directional diagram and the radiation performance test index of full frequency and multiple dip angles can be simultaneously inspected;
4. by simulating the length of the feeder line of the adjusting unit, the directional diagram of the array antenna can be changed, and radiation performance tests such as sidelobe suppression, downtilt angle and gain are further adjusted;
5. in the design process, optimization is already carried out based on far-field directional diagram indexes, the times of using a standard far-field system to measure the antenna are reduced, and the design process of the array antenna is accelerated;
6. the system only needs to work in a general open occasion, does not need to be strictly shielded and meets the requirement of far-field distance measurement, and is convenient and quick and low in manufacturing cost.
Drawings
Fig. 1 shows a flow chart of a conventional array antenna design;
fig. 2 is a design flowchart and a design system configuration diagram of an array antenna according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating the interface and effect provided by the embodiment of the present invention;
fig. 4 is a flowchart illustrating a method for designing an array antenna according to an embodiment of the present invention;
fig. 5 is a block diagram illustrating a design apparatus of an array antenna according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Example 1
Fig. 2 is a flowchart showing a design process and a design system configuration of an array antenna according to an embodiment of the present invention, fig. 4 is a flowchart showing a design method of an array antenna according to an embodiment of the present invention, and referring to fig. 2 and 4, a design method of an array antenna according to an embodiment of the present invention includes:
step S110, acquiring near-field amplitude-phase coefficients and array information of each unit of the array antenna under each frequency and/or each inclination angle;
step S120, performing near-far field transformation by using the amplitude-phase coefficient and the array information, and outputting an array far-field directional diagram and a radiation performance test index;
step S130, when the array far field pattern and the radiation performance test index do not meet the design index requirement, changing the feed length of the feed network to adjust the feed additional phase of each unit;
and step S140, performing near-far field transformation again based on the adjusted feeding additional phase to obtain an adjusted array far-field directional diagram and an adjusted radiation performance test index, and performing index judgment until the design index requirement is met.
Specifically, the design steps of the array antenna are optimized as follows:
step S10, according to the index requirements of gain, beam width, sidelobe suppression, etc., initially designing array information and feed network composition, the array information includes: the number of units and the unit interval are calculated, and the installation of the array antenna information and the feed network is realized physically, namely the array antenna of the initial design is realized;
step S20, starting the linear array designer software on the main control computer, inputting array information and frequency; the array antenna is placed on a test bench, the input port of the array antenna is connected to a test port 1 of a vector network analyzer, a radio frequency probe is moved to each unit of the array antenna in a handheld mode, and linear array designer software is operated to read the amplitude-phase coefficient of each unit.
And step S110, the main control computer obtains the amplitude-phase coefficient and the array information of the near field of each unit of the array antenna under each frequency and/or each inclination angle.
Step S120, the main control computer performs near-far field transformation by using the amplitude-phase coefficient and the array information, and outputs an array far-field directional diagram and a radiation performance test index;
step S130, observing the array far field pattern and radiation performance test index of each frequency and/or each inclination angle to see whether the design requirement is met;
step S140, if the requirement of the design index is not met, simulating the length of a feeder line of the adjusting unit on a main control computer, carrying out near-far field transformation again based on the adjusted feeding additional phase to obtain an adjusted array far-field directional diagram and an adjusted radiation performance test index, and carrying out the judgment step of the requirement of the design index again until the requirement of the design index is met;
step S200, if the length of the unit feeder line is repeatedly adjusted and cannot meet the index requirement, it indicates that the antenna performance cannot be realized by means of adjusting the additional phase of the feeder line, and the basic parameters of the basic feed network or the antenna array need to be redesigned. I.e. returning to step S10 and/or step S20 to optimize the feed network design and/or array design.
According to the design method of the array antenna, far field measurement is not needed, and an array far field pattern and radiation performance test index can be directly obtained through a near-far field transformation algorithm after the unit amplitude-phase coefficient is detected; the array far field pattern and the radiation performance test index under full frequency and multiple dip angles can be simultaneously inspected; by simulating the length of the feeder line of the adjusting unit, the directional diagram of the array antenna can be changed, and further radiation performance test indexes such as sidelobe suppression, downward inclination, gain and the like are adjusted; in the design process, optimization is already carried out based on far-field directional diagram indexes, the times of using a standard far-field system to measure the antenna are reduced, and the design process of the array antenna is accelerated; the system only needs to work in a general open occasion, does not need to be strictly shielded and meets the requirement of far-field distance measurement, and is convenient and quick and low in manufacturing cost.
Specifically, the near-far field transformation is performed using the following equation:
wherein the content of the first and second substances,
representing a unit index representing the second
The number of the units is one,
representing the far field direction function of the array,
is the first
The unit directional diagram of each unit cell is,
is the first
The amplitude-phase coefficient of each unit,
is shown as
The amplitude of the individual elements is such that,
is the first
The phase coefficient of each of the cells is,
in terms of the wave number, the number of waves,
is the wavelength of the center frequency and,
is the first
The additional phase of the feed of the individual elements,
in order to obtain a cell pitch,
is the pitch angle of the array antenna.
According to the embodiment of the invention, far field measurement is not needed, an array far field pattern and a radiation performance test index can be directly obtained through a near-far field transformation algorithm after the amplitude-phase coefficient of each unit is detected, the array performance is evaluated through the array far field pattern and the radiation performance test index, and the evaluation of the array antenna performance is more visual than the evaluation of the amplitude-phase coefficient.
Specifically, the feed additive phase of each cell is calculated according to the following equation:
wherein the content of the first and second substances,
in terms of the wave number, the number of waves,
is the wavelength of the center frequency and,
is the first
The additional phase of the feed of the individual elements,
is virtually connected in series to
The length of the feed line on each cell,
is the relative permittivity of the feed line insulating medium,
representing the antenna radiation distance in far field conditions.
The embodiment of the invention changes the feed additional phase of each unit by simulating the length of the feeder line of the adjusting unit, further changes the directional diagram of the array antenna, and achieves the purpose of adjusting radiation performance test indexes such as sidelobe suppression, downward inclination angle, gain and the like. Because the measured amplitude-phase parameters are of a working broadband (namely working frequency), the simulation superposition is of a real radio frequency cable, and the phase of the actual working frequency can be calculated. Therefore, the embodiment of the invention can easily calculate the radiation performance test index in the whole working frequency, thereby completing the performance evaluation in the whole working frequency band.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. An embodiment of the present application will be described below with reference to fig. 3.
As shown in the linear array designer page on the left side of fig. 3, the basic parameters of the array antenna can be input on the main interface: the number of elements, the element pitch, and the element type, the design frequency, and the dielectric constant of the insulating medium of the feeder cable, etc.; the unit type of each unit and the near field acquisition condition at three dip angles (hook indicates that the amplitude and phase coefficients have been acquired) are given below the main interface, and the cable compensation value of each unit is given.
The directional diagram index page shown on the right side of fig. 3 shows the directional diagram obtained by current calculation, the abscissa is the pitch angle of the antenna, the ordinate is the normalized gain value, and different frequencies in the diagram correspond to different curves, and the curves are different according to different design requirements. The lower index zone of the directional diagram index page gives radiation performance test indexes such as directivity coefficient, vertical plane lobe width (namely vertical plane beam width), downward inclination, first upper side lobe suppression, 30-degree inner upper side lobe suppression, vertical plane side lobe level and the like, and the design and adjustment of the array antenna can be guided.
The initial cable compensation amount is 0, namely the initial state of the array antenna. If the radiation index does not meet the design value, the cable compensation quantity of each unit on the linear array designer can be adjusted, namely the length of a feeder virtually connected in series with the unit is changed, and therefore the additional phase of feeding of the unit is changed. And the main control computer performs near-far field transformation again by using the new feeding additional phase, draws a new directional diagram and calculates the radiation performance test index. The adjustment process needs a small amount of calculation, the time for performing near-far field transformation, drawing a directional diagram and calculating a radiation performance test index by main control calculation is almost real-time, and therefore repeated attempts can be made in a short time to find out the optimal feeder line length.
For the adjustable electrical downtilt array antenna, the embodiment of the invention also provides a function of simultaneously adjusting the large, medium and small inclination angles. When the system is used, the amplitude-phase coefficient of each unit is measured in the state of three dip angles, and the system can simultaneously calculate the far-field directional diagram of the array and the radiation performance test index of the three dip angles. When the cable compensation is adjusted, the directional diagrams of three dip angles and the index change condition of the radiation performance test index can be observed at the same time, and the performance of the designed array antenna can be evaluated more comprehensively.
Example 2
Fig. 5 is a block diagram illustrating a configuration of an array antenna designing apparatus according to an embodiment of the present invention, and referring to fig. 5, an embodiment of the present invention further provides an array antenna designing apparatus 100, which may be a mobile phone, a computer, a digital broadcasting terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, and the like. The apparatus comprises:
the acquiring unit 110 is configured to acquire near-field amplitude-phase coefficients and array information of each unit of the array antenna at each frequency and/or each inclination angle;
the transformation unit 120 is configured to perform near-far field transformation by using the amplitude-phase coefficient and the array information, and output an array far-field pattern and a radiation performance test index;
the adjusting unit 130 is used for adjusting the feeding additional phase of each unit when the array far-field pattern and the radiation performance test index do not meet the design index requirement;
and the transformation unit 120 is further configured to perform near-far field transformation and index judgment again based on the adjusted additional phase of feeding until the design index requirement is met. And if the length of the adjusted feeder line cannot meet the index requirement, redesigning basic feed network and/or basic parameters of the array antenna.
Specifically, the transform unit 120 performs near-far field transform by using the following equation:
wherein the content of the first and second substances,
representing the far field direction function of the array,
is the first
The unit directional diagram of each unit cell is,
is the first
The amplitude-phase coefficient of each unit,
is shown as
The amplitude of the individual elements is such that,
is the first
The phase coefficient of each of the cells is,
in terms of the wave number, the number of waves,
is the wavelength of the center frequency and,
is the first
The additional phase of the feed of the individual elements,
in order to obtain a cell pitch,
is the pitch angle of the array antenna.
Specifically, the adjusting unit 130 is configured to calculate the feeding additional phase according to the following equation:
wherein the content of the first and second substances,
in terms of the wave number, the number of waves,
is the wavelength of the center frequency and,
is the first
The additional phase of the feed of the individual elements,
is virtually connected in series to
The length of the feed line on each cell,
is the relative permittivity of the feed line insulating medium,
representing the antenna radiation distance in far field conditions.
The invention benefits from the development of computer technology, possibly introduces computer aided design technology into the design process of the array antenna, can measure and measure the amplitude-phase coefficient after completing the basic design of the array antenna and realizing the basic feed network, and estimates the radiation performance of the antenna according to the amplitude-phase coefficient, thereby reducing the frequency of far-field measurement and shortening the design period. And a virtual adjustment technology can be introduced to calculate the change of far-field radiation performance after the amplitude-phase coefficient is changed in real time.
Example 3
Fig. 2 is a flowchart showing a design process and a design system configuration of an array antenna according to an embodiment of the present invention, and referring to fig. 2, the embodiment of the present invention provides a design system of an array antenna, including: the system comprises a tested array antenna placed on a test board, a main control computer (in the embodiment of the invention, the design equipment of the array antenna is a computer), a vector network analyzer, a radio frequency probe connected to a test port of the vector network analyzer and a linear array designer installed on the main control computer. The main control computer is connected with the vector network analyzer through an internet access or GPIB card, a test port 1 of the vector network analyzer is connected to an input port of the array antenna to be tested, and a test port 2 is connected to the radio frequency probe through a test cable.
The radio frequency probe is manually moved, is placed above the units of the array antenna, and is used for sampling the radiation near field of each unit of the antenna and transmitting the radiation near field back to the vector network analyzer; the vector network analyzer is connected with the radio frequency probe and the array antenna to be measured through a port and is used for measuring the amplitude-phase coefficient of the array antenna to be measured under the control of the main control computer; the main control computer controls the vector network analyzer to test and extracts the near-field amplitude-phase coefficient and the array information of each unit of the array antenna to be tested under each frequency and/or each inclination angle from the vector network analyzer; the linear array designer performs near-far field transformation by using the amplitude-phase coefficient and the array information of each unit, and outputs an array far-field directional diagram and a radiation performance test index; judging whether the array far-field directional diagram and the radiation performance test index meet the design index requirements or not; if the antenna array antenna. If the length of the feeder line of the unit can not meet the index requirement by repeated adjustment, the performance of the antenna can not be realized by means of adjusting the additional phase of the feed, and the basic parameters of the basic feed network or the antenna array need to be redesigned. Namely, the array antenna and/or the feed network are optimally designed again.
According to the design method of the array antenna, far field measurement is not needed, and an array far field pattern and radiation performance test index can be directly obtained through a near-far field transformation algorithm after the unit amplitude-phase coefficient is detected; the array performance is evaluated based on the array far-field directional diagram and the radiation performance test index, and the evaluation of the amplitude-phase coefficient is more visual than the direct evaluation of the amplitude-phase coefficient; the array far field pattern and the radiation performance test index of full frequency and multiple dip angles can be simultaneously inspected; by simulating the length of the feeder line of the adjusting unit, the directional diagram of the array antenna can be changed, and radiation performance tests such as sidelobe suppression, downtilt angle and gain are further adjusted; in the design process, optimization is already carried out based on far-field directional diagram indexes, the times of using a standard far-field system to measure the antenna are reduced, and the design process of the array antenna is accelerated; the system only needs to work in a general open occasion, does not need to be strictly shielded and meets the requirement of far-field distance measurement, and is convenient and quick and low in manufacturing cost.
Example 4
The embodiment of the present invention further provides a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, the computer-executable instructions are used to implement the above-mentioned design method for an array antenna.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (6)
1. A method for designing an array antenna, comprising:
acquiring near-field amplitude-phase coefficients and array information of each unit of the array antenna under each frequency and/or each inclination angle;
performing near-far field transformation by using the amplitude-phase coefficient and the array information, and outputting an array far-field directional diagram and a radiation performance test index;
when the array far-field directional diagram and the radiation performance test index do not meet the design index requirements, the feed length of the feed network is changed through the length of a feed line which is virtually connected in series with the unit so as to adjust the feed additional phase of the unit;
based on the adjusted feed additional phase, performing near-far field transformation and index judgment again until the requirement of radiation performance design index is met;
performing near-far field transformation using the following equation:
wherein the content of the first and second substances,
the index of the unit is represented and,
representing the far field direction function of the array,
is the first
The unit directional diagram of each unit cell is,
is the first
The amplitude-phase coefficient of each unit,
is shown as
The amplitude of the individual elements is such that,
is the first
The phase coefficient of each of the cells is,
in terms of the wave number, the number of waves,
is the wavelength of the center frequency and,
is the first
The additional phase of the feed of the individual elements,
in order to obtain a cell pitch,
is the pitch angle of the array antenna;
the additional phase of the feeding of the cell is calculated according to:
wherein the content of the first and second substances,
in terms of the wave number, the number of waves,
is the wavelength of the center frequency and,
is the first
The additional phase of the feed of the individual elements,
is virtually connected in series to
The length of the feed line on each cell,
is the relative permittivity of the feed line insulating medium.
2. The method according to claim 1, characterized in that if the adjusted feeder length fails to meet the target design requirements, the basic feed network and/or the basic parameters of the array antenna are redesigned.
3. An array antenna designing apparatus, comprising:
the acquisition unit is used for acquiring near-field amplitude-phase coefficients and array information of each unit of the array antenna under each frequency and/or each inclination angle;
the transformation unit is used for performing near-far field transformation by using the amplitude-phase coefficient and the array information and outputting an array far-field directional diagram and a radiation performance test index;
the adjusting unit is used for changing the feed length of the feed network through the length of a feed line which is virtually connected in series with the unit so as to adjust the feed additional phase of the unit when the far-field directional diagram of the array and the radiation performance test index do not meet the radiation performance design index requirement;
the transformation unit is also used for carrying out near-far field transformation and index judgment again based on the adjusted feed additional phase until the requirement of the radiation performance design index is met;
the transformation unit performs near-far field transformation by adopting the following formula:
wherein the content of the first and second substances,
the number of the units is represented,
representing the far field direction function of the array,
is the first
The unit directional diagram of each unit cell is,
is the first
The amplitude-phase coefficient of each unit,
is shown as
The amplitude of the individual elements is such that,
is the first
The phase coefficient of each of the cells is,
in terms of the wave number, the number of waves,
is the wavelength of the center frequency and,
is the first
The additional phase of the feed of the individual elements,
in order to obtain a cell pitch,
is the pitch angle of the array antenna;
the adjusting unit is used for calculating the feeding additional phase of the unit according to the following formula:
wherein the content of the first and second substances,
in terms of the wave number, the number of waves,
is the wavelength of the center frequency and,
is the first
The additional phase of the feed of the individual elements,
is virtually connected in series to
The length of the feed line on each cell,
is the relative permittivity of the feed line insulating medium.
4. The device according to claim 3, characterized in that the basic feed network and/or the basic parameters of the array antenna are redesigned if the adjusted feed line length fails to meet the specification requirements.
5. An array antenna design system, comprising the array antenna design device of claim 3, an array antenna, a vector network analyzer, and a radio frequency probe;
the radio frequency probe is placed on each unit of the array antenna and used for sampling the amplitude-phase coefficient of each unit of the antenna and transmitting the amplitude-phase coefficient back to the vector network analyzer;
the vector network analyzer is connected with the radio frequency probe through a cable, is connected with the array antenna, and is used for measuring the amplitude-phase coefficient of the near field of each unit of the array antenna under each frequency and/or each inclination angle under the control of the design equipment.
6. A computer-readable storage medium having computer-executable instructions stored thereon, which when executed by a processor, implement the design method of the array antenna according to any one of claims 1 to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110994478.0A CN113449439B (en) | 2021-08-27 | 2021-08-27 | Design method, device and system of array antenna and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110994478.0A CN113449439B (en) | 2021-08-27 | 2021-08-27 | Design method, device and system of array antenna and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113449439A CN113449439A (en) | 2021-09-28 |
| CN113449439B true CN113449439B (en) | 2022-04-01 |
Family
ID=77818830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110994478.0A Active CN113449439B (en) | 2021-08-27 | 2021-08-27 | Design method, device and system of array antenna and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113449439B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594026A (en) * | 2018-01-31 | 2018-09-28 | 清华大学 | A kind of near-field test method for rebuilding antenna array far-field pattern in radiading near-field region |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354814A (en) * | 2011-06-21 | 2012-02-15 | 零八一电子集团有限公司 | Method for debugging micro-strip antenna array |
| CN103364645A (en) * | 2013-07-17 | 2013-10-23 | 中国船舶重工集团公司第七二四研究所 | Near-field measurement method for antenna array of virtual feed network |
| CN107817390A (en) * | 2016-09-12 | 2018-03-20 | 深圳市新益技术有限公司 | A kind of antenna synthesis test system |
| CN111025029A (en) * | 2019-11-18 | 2020-04-17 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | System and method for testing near-field directional diagram of triple-frequency phased array surface |
-
2021
- 2021-08-27 CN CN202110994478.0A patent/CN113449439B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594026A (en) * | 2018-01-31 | 2018-09-28 | 清华大学 | A kind of near-field test method for rebuilding antenna array far-field pattern in radiading near-field region |
Non-Patent Citations (2)
| Title |
|---|
| k波段微带阵列天线技术研究;郭婧;《中国优秀硕士学位论文全文数据库》;20160315;第I136-49页 * |
| S波段级联偏置锁相频率源的研究;唐超;《中国优秀硕士学位论文全文数据库》;20180915;第I136-80页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113449439A (en) | 2021-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7541818B2 (en) | Method and apparatus of electromagnetic measurement | |
| US9699678B2 (en) | Plane wave generation within a small volume of space for evaluation of wireless devices | |
| KR101360280B1 (en) | Multichannel absorberless near field measurement system | |
| CN113225147A (en) | Method, device and system for measuring total radiation power of array antenna | |
| KR20190061025A (en) | Reduced grid for measurement of total radiation power | |
| US20070285322A1 (en) | Multichannel absorberless near field measurement system | |
| US20110193566A1 (en) | Multichannel absorberless near field measurement system | |
| CN107390035A (en) | Antenna measurement system and antenna measurement method | |
| Snastin et al. | Calibration of a Planar Scanner for Near-Field Antenna Measurements | |
| CN113449439B (en) | Design method, device and system of array antenna and storage medium | |
| Carlberg et al. | Numerical study of position stirring and frequency stirring in a loaded reverberation chamber | |
| US11012163B1 (en) | Apparatus and methods for fast and accurate near-field measurement | |
| Bronckers et al. | Uncertainty in reverberation-chamber antenna-efficiency measurements in the presence of a phantom | |
| Ren et al. | The impact of near-field scanning size on the accuracy of far-field estimation | |
| CN109142888B (en) | Satellite electromagnetic leakage positioning method and system | |
| Janssen et al. | Correlation coefficient and loading effects for MIMO antennas in a reverberation chamber | |
| Matsukawa et al. | Uncertainty analysis of far-field gain measurement of drgh using the single-antenna method and amplitude center distance | |
| WO2013158004A1 (en) | Efficient whole-body sar estimation | |
| Ghosh et al. | Growth of radiated emission in multi-modular systems | |
| Toivanen et al. | Calibration of multi-probe antenna measurement system using test zone field compensation | |
| Harima et al. | Determination of gain for pyramidal-horn antenna on basis of phase center location | |
| CN111682907A (en) | Satellite antenna isolation high-precision test system | |
| CN111310311A (en) | Precise shaping design method and system for base station antenna | |
| JP2007163236A (en) | Electromagnetic wave measuring method and electromagnetic wave measuring device | |
| Bittera et al. | Alternative Approach Leading to Reduction in Measurement Instrument Uncertainty of EMI Measurement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |