Method for acquiring scattered field of large-scale array antenna
An array antenna and acquisition method technology, applied in the electromagnetic field, can solve the problems of impact assessment efficiency, large computing resources and computing time, failure, etc., achieve a wide range of applications, reduce computing resources and computing time consumption, and reduce extraction difficulty Effect
Pending Publication Date: 2022-04-26
XIDIAN UNIV
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, because this method only uses symmetry and periodicity to reduce the original calculation amount, it is still a full-array inversion in essence, so its calculation amount cannot get rid of the constraints of the number of large-scale array antenna elements. For larger-scale array antennas , the computing resources and computing time consumed are still extremely large, which affects the evaluation efficiency, and this method is only applicable to simulation calculations, and will be invalid for test cases
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0037] In order to more clearly describe the technical solutions and effects of the present invention, the following description will be made in conjunction with specific embodiments and accompanying drawings.
[0038] refer to figure 1 , the implementation steps of the present invention are as follows:
[0039] Step 1: Build a large-scale array antenna.
[0040] refer to figure 2 , this example uses FEKO simulation, uses the microstrip antenna as the array unit of the array antenna to obtain a large-scale antenna array, and establishes a planar array with a scale of 10*10 in the Cartesian xyz coordinate system as the large-scale array antenna to obtain the scattering field , the antenna elements are evenly distributed, where the positive direction of the x-axis is a row, the row spacing is 0.75λ, the positive direction of the y-axis is a column, the column spacing is 0.75λ, the working frequency is 5GHz, the incident wave is a plane wave, and the incident angle is θ= 0°, ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a method for acquiring a scattered field of a large-scale array antenna, and mainly solves the problems of low calculation speed and huge calculation resource consumption when the scattered field of the large-scale array antenna is acquired in the prior art. According to the implementation scheme, the method comprises the steps of obtaining a scattered field of a sub-array, and performing translation; performing spherical wave expansion on the translated scattered field; calculating the scattered field of the lth antenna unit according to the spherical expansion formula, and obtaining the scattered fields of all antenna units of the sub-array; obtaining the relative translation amount between the sub-array and the large-scale array antenna unit; calculating a scattered field of each unit of the large-scale array antenna according to the relative translation amount; and performing field superposition on the scattered fields of all the units to obtain a total scattered field of the large-scale array antenna. According to the method, the total scattered field data of the sub-array is used, the scattered field of each unit of the sub-array is obtained through mode filtering, the large-scale array antenna is expanded and constructed, consumption of computing resources and time is reduced, the computing speed is increased, and the method can be used for obtaining the scattered fields of the large-scale array antenna in different modes.
Description
technical field [0001] The invention belongs to the field of electromagnetic technology, in particular to a method for quickly acquiring a tested or simulated electromagnetic scattering field. It can be used to obtain the scattered field of large-scale array antennas. Background technique [0002] It is well known in the industry that the development cycle of large airborne and shipborne radars is long and the cost is high. It is of great engineering value to study an efficient and high-precision evaluation method for the measured electromagnetic scattering characteristics of large-scale array antennas. At this stage, the research on the scattering characteristics of large-scale array antennas is mainly obtained through testing and simulation, such as using various simulation software to calculate the scattering field of the target array, or measuring it in a dark room by making a real object. [0003] However, the above method still faces many difficulties. On the one hand...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G06F17/10
CPCG06F17/10
Inventor 张帅李天瑞周肖宋子璇王泽溥邢日丽赵宇龙
Owner XIDIAN UNIV