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Design method for airborne early warning conformal array pitching detection beam forming

A technology of beamforming and airborne early warning, applied in design optimization/simulation, suitable for antennas on movable objects, antenna arrays, etc., can solve problems such as ignoring excitation

Active Publication Date: 2020-06-16
XIDIAN UNIV
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Problems solved by technology

[0004] However, the current improvements to Bernstein polynomials, whether applied to conformal linear arrays or surface arrays, ignore the connection between the elements of each row of the array and limit the further reduction of sidelobes. The optimized excitation of each row of elements The maximum value of the amplitude is the same and is 1, which ignores the "personality" of the excitation of different rows of the array

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  • Design method for airborne early warning conformal array pitching detection beam forming
  • Design method for airborne early warning conformal array pitching detection beam forming
  • Design method for airborne early warning conformal array pitching detection beam forming

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Embodiment Construction

[0102] Such as figure 1 As shown, the beamforming design method for the airborne early warning conformal array elevation surface detection includes:

[0103] Step (1), according to the general expression of the aperture efficiency of the early warning radar planar array, derive the aperture efficiency expression of the conformal array:

[0104] The General Expression of Field Strength on the Elevation Surface of Array

[0105]

[0106] where: f nθ (θ) represents the polarization component of the unit vector pattern in the θ direction;

[0107] I n is the excitation amplitude of the nth array element, φ n is the excitation phase;

[0108] k is the space propagation constant, k=2π / λ, λ is the wavelength;

[0109] r n is the position vector of the nth array element;

[0110] r is the unit vector in the far field direction;

[0111] Combined with the coordinate system rotation method to obtain the far field of the pitch plane of the conformal array, its expression is ...

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Abstract

The invention belongs to the technical field of antennas, and particularly relates to a design method for airborne early warning conformal array pitching detection beam forming, and the core of the design method is to introduce an amplitude control variable into a modified Bernstein polynomial. By means of the method, on one hand, optimization variables in the optimization process are reduced, theoptimization speed is increased, and on the other hand, the introduced amplitude control variables can enable the sidelobe level of the whole array to be reduced, which is very beneficial to airborneearly warning radar detection. And meanwhile, the optimized unit excitation change is gentle, so that the design of a feed network is facilitated, and the corresponding construction cost is greatly reduced. The method can be used for early warning radar pitching surface detection beam forming design, array sidelobe improvement and array feed network design simplification.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a design method for beamforming of an airborne early warning conformal array pitch detection, which can be used to realize the design of the pitch plane beamforming, improve array sidelobes and simplify the array during detection of early warning conformal radar Feed network design. Background technique [0002] The early warning radar is the most important detection equipment and intelligence source on the early warning aircraft, and its detection objects are generally aircraft targets flying at different altitudes and sea ships. When detecting targets, in order to avoid the occurrence of signal attenuation areas and false targets caused by reflections, it is necessary to design the shape of the elevation surface detection beam. The application of beamforming achieves coverage of the main airspace while reducing the impact caused by reflections generated by the gro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20H01Q1/28H01Q21/00G06F111/10
CPCH01Q1/285H01Q21/00Y02T10/40
Inventor 曾元琛李娜段宝岩钟旺张烁孙梓涵
Owner XIDIAN UNIV
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