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Phased-array antenna electrical performance compensation method and system based on temperature field reconstruction

A technology of phased array antenna and compensation method, which is applied in the direction of antenna, antenna array, circuit, etc.

Active Publication Date: 2021-06-25
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: how to solve the shortcomings existing in the prior art that the temperature field needs to be superimposed and converted into structural deformation and mechanically adjust the electrical performance, and provide a phased array antenna electrical performance based on temperature field reconstruction Compensation method, which compensates the electrical performance of the phased array antenna affected by temperature by changing the amplitude and phase of the excitation current

Method used

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  • Phased-array antenna electrical performance compensation method and system based on temperature field reconstruction
  • Phased-array antenna electrical performance compensation method and system based on temperature field reconstruction
  • Phased-array antenna electrical performance compensation method and system based on temperature field reconstruction

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Embodiment 1

[0063] Such as figure 1 As shown, this embodiment provides a technical solution: a phased array antenna electrical performance compensation method based on temperature field reconstruction, including the following:

[0064] Step (1): Determine the electrical performance compensation principle of the phased array antenna:

[0065] The ideal electrical performance function of an active phased array antenna can be expressed as:

[0066]

[0067] Wherein, N is the unit number of antenna array; is the excitation current of the nth antenna element, where A n with Indicates the amplitude and phase of the unit excitation current; f n (θ,φ) is the active element pattern of the nth antenna element; the vector is the vector radius from the coordinate origin to the center of the nth antenna element, where x n ,y n ,z n Indicates the location coordinates of the cell center; from the coordinate origin to The unit vector of the viewing direction; k = 2π / λ denotes the wave c...

Embodiment 2

[0093] This embodiment provides a technical solution: a phased array antenna electrical performance compensation method based on temperature field reconstruction, including the following:

[0094] 1. Experimental content

[0095] In this embodiment, the power amplifier used in the temperature drift characteristic experiment of the power amplifier is the HMC952ALP5GE chip produced by Hittite Company. In the corresponding parameter manual, the normal operating frequency band of the chip is 8-12GHz, and the PA implementation sample The substrate material of the test circuit board is RogersRT / duroid4350, the dielectric constant ε r =2.2, the dielectric loss tangent tanδ=0.0002, the radio frequency transmission line adopts the form of coplanar waveguide.

[0096] During the whole implementation process, by changing the temperature of the high and low temperature box, the image of the amplitude of the transmission coefficient S21 (forward transmission coefficient, ie gain) changing...

Embodiment 3

[0102] Based on Embodiment 2, in this embodiment, the center frequency of the antenna used during the experiment is 10 GHz; the antenna is designed according to the above-mentioned center frequency, and according to the results of the temperature drift characteristic experiment on the power amplifier device, it is determined by vector fitting and extreme learning machine algorithm The mechanism model of the influence of temperature on the amplitude and phase is established, and the simulation model of the antenna is 8×8 elements, such as Figure 4 As shown, it is the temperature distribution of the antenna unit in Embodiment 1, and the amplitude and phase to be compensated are calculated according to the proposed method for calculating electrical performance compensation, and the final compensation result is as follows Image 6 shown.

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Abstract

The invention discloses a phased-array antenna electrical performance compensation method and system based on temperature field reconstruction, and belongs to the technical field of radar antennae, and the method comprises the steps: carrying out the temperature field transient simulation, actual measurement and temperature reconstruction of a phased-array antenna through an antenna temperature field measurement method under incomplete information; carrying out a temperature drift characteristic experiment on the phased-array antenna component to obtain a transmission parameter curve at a discrete temperature; adopting a vector fitting method to fit a frequency response function of transmission parameters changing along with frequency and temperature at each test temperature; introducing an extreme learning machine algorithm to establish a mathematical model among frequency, temperature, frequency response function poles and residues; and taking the measured frequency and temperature of the phased-array antenna as input variables, obtaining a pole and a residue of a frequency response function, determining the amplitude and the phase of excitation current, and carrying out electrical performance compensation. The method and system can be used for compensating the electrical performance of the phased-array antenna influenced by the temperature, so that the phased-array antenna reaches the optimal working state.

Description

technical field [0001] The invention relates to the technical field of radar antennas, in particular to a phased array antenna electrical performance compensation method and system based on temperature field reconstruction. Background technique [0002] The active phased array antenna refers to the antenna that changes the shape of the pattern by controlling the feeding phase of the radiating element in the array antenna. It has the characteristics of small size, high reliability, multiple functions and high integration, and has gradually become the current satellite mobile antenna. The most important form of antenna in a communication system. For a phased array antenna, the antenna elements in the array are sensitive to temperature, and the temperature will affect its amplitude and phase, and the amplitude and phase values ​​determine the radiation characteristics of the phased array antenna, that is, the problem of uneven temperature distribution will The difference in am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20H01Q21/00
CPCG06F30/20H01Q21/00
Inventor 王梅王平安王志海张平叶锐王杰张阳阳李俊英侯守武
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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