An Irregular Antenna Array Optimization Method Based on Maximization of Subarray Factor Gain
An irregular, antenna array technology, applied to antenna arrays, antenna arrays, antennas, etc. that are energized separately, can solve the problems of not fully utilizing the contribution of the sub-array factor gain, unsatisfactory optimization results, etc., to simplify complexity , Efficient and comprehensive effect
Active Publication Date: 2021-10-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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However, this method does not make full use of the contribution of the sub-array factor to the gain, and the sub-array factor plays a decisive role in the performance of irregular arrays, especially for the case of small number of sub-arrays or large cell spacing
Therefore, the optimization results of this method are not satisfactory for sub-arrays with a small number of sub-arrays such as dijoints or irregular antenna arrays with large element spacing.
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[0034] Consider an irregular antenna array with an array size of M×N=22×12, the element spacing along the x and y directions is half a wavelength, and the sub-array is composed of a dijoint consisting of two elements. In this implementation case, the desired beam scan angle is The desired sidelobe level is δ = -20dB. The reference array is a full array with half-wavelength spacing of Chebyshev excitation under the same array size and peak sidelobe level.
[0035] Utilize the optimization method proposed in the present invention to optimize this irregular antenna array, first use integer optimization to solve optimization problem 1, obtain the irregular antenna array that contains 132 sub-arrays, and the corresponding array topology is as follows figure 2 As shown, it can be seen that the entire front is accurately and completely divided, and presents an irregular distribution state. According to the optimized array topology, the convex optimization algorithm is used to sol...
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The invention discloses an irregular antenna array sub-array layout optimization method based on sub-array factor gain maximization. The present invention decomposes the formula for calculating the pattern of the irregular antenna array into the product of the sub-array factor and the sub-array pattern. Since the sub-array factor plays a decisive role in the radiation performance of the irregular antenna array, the maximum gain of the sub-array factor is established first. , while satisfying the integer optimization problem that the antenna array is accurately and completely divided, use the integer optimization solver to find the best irregular antenna array topology; then, according to the optimized array topology, establish the beamwidth and peak sidelobe Convex optimization problem with the level as the constraint, maximizing the gain of the irregular antenna array as the objective function, and subarray-level amplitude-phase excitation as the optimization variable, and using a convex optimization algorithm to find an efficient solution, avoiding directly solving complex mixed integers Optimization.
Description
technical field [0001] The invention belongs to the technical field of antennas, and relates to the optimization sub-problem of arrays in phased array antennas with limited number of active channels. Specifically, it refers to the establishment of an optimization problem with the antenna array gain as the objective function, the beam scanning angle, the peak sidelobe level as the constraint conditions, and the subarray arrangement and subarray-level amplitude-phase excitation as the constraint conditions, so as to ensure that the obtained Antenna arrays with irregular sub-arrays can satisfy the given constraints while maximizing the gain. Background technique [0002] Phased array antennas are widely used in various radar and communication system fields due to their flexible and fast beamforming and beam scanning capabilities. With the rapid development of wireless technology, the system puts forward more and more stringent technical index requirements for antenna arrays, w...
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IPC IPC(8): H01Q21/06H01Q3/00G06F17/16
CPCG06F17/16H01Q3/00H01Q21/061
Inventor 杨锋杨仕文张哲晨陈科锦黄明陈益凯屈世伟
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA