Synthesis method of broadband frequency independent thinned array taking mutual coupling effect into account

A sparse array and comprehensive method technology, applied in the field of array antennas, can solve the problems of not considering the mutual coupling effect of actual array elements, not considering the design of broadband non-frequency-variable beams, etc., to avoid errors, reduce engineering costs, and reduce hardware complexity. degree of effect

Active Publication Date: 2017-05-10
XIAMEN UNIV
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Problems solved by technology

However, this invention does not consider the design of the broadband non-frequency variable bea

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  • Synthesis method of broadband frequency independent thinned array taking mutual coupling effect into account
  • Synthesis method of broadband frequency independent thinned array taking mutual coupling effect into account
  • Synthesis method of broadband frequency independent thinned array taking mutual coupling effect into account

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Embodiment Construction

[0036] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0037] step one:

[0038] Determine the number of array elements, frequency bandwidth, element antenna structure, and array element spacing according to the system application index. Use full-wave electromagnetic simulation software, such as HFSS, to build a linear array of N elements, and the element antennas are Vivaldi antennas with a spacing of λ min / 2, λ min is the wavelength corresponding to the maximum operating frequency. Such as figure 1 As shown, where R=44.26mm, θ=90°, W=230.00mm, W1=123.50mm, L=287.00mm, d=5.72mm. After simulation, the active unit pattern a of its unit antenna is derived n (ω,θ). will a n (ω,θ) is applied in...

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Abstract

The discloses a synthesis method of a broadband frequency independent thinned array taking mutual coupling effect into account, and relates to array antennae. Iterative weighted first norm is adopted in a plurality of limiting conditions, and the limiting conditions comprise a spatial response change limit, a side lobe level upper boundary limit and an expected direction limit. As the limiting conditions are all convex problems, the problems are optimized through iterative second-order cone programming. In a target working frequency range, low side lobe level can be kept, the quantity of array elements can be effectively reduced under a main lobe frequency independent performance, the hardware complexity and the engineering cost are furthest reduced. In addition, electromagnetic mutual coupling effect met in the practical application is considered, and error, caused by coupling, of an antenna system is effectively avoided.

Description

technical field [0001] The invention relates to array antennas, in particular to a wideband non-frequency-variable sparse array synthesis method considering mutual coupling effects. Background technique [0002] Broadband array antennas have been widely used in communication, radar and tracking fields. The non-frequency-variable beam in the broadband array antenna can transmit or receive instantaneous broadband signals without distortion, which has outstanding advantages in some applications [1]. Generally speaking, in order to realize this non-frequency-variable beam, an analog-to-digital converter and digital filter technology are used in each array element channel to provide the array element with frequency-dependent excitation weights that meet the requirements. The current popular non-frequency-variant techniques mainly include: convex optimization method[2][3], Fourier transform method[4], least square method[5], random method[6], analytical method[7] and multi-rate ...

Claims

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Application Information

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IPC IPC(8): G06F17/50H01Q21/00
CPCG06F30/20G06F2111/06G06F2111/10H01Q21/00
Inventor 刘颜回程娟徐开达韩峰柳清伙
Owner XIAMEN UNIV
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