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Arrangement method of ultra-wideband overall-caliber array antenna

An array antenna and extremely wideband technology, which is applied in the field of arraying of extremely wideband synthetic aperture array antennas, and can solve the problems of large bandwidth, difficulty in realizing array antennas, and inaccessibility of antenna units.

Active Publication Date: 2021-02-26
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

Most of the traditional ultra-wideband array antennas adopt the form of tightly coupled array antennas. The bandwidth of this antenna exceeds 10:1, whether the antenna unit itself cannot achieve such a large bandwidth, or the spacing between the array units is limited by the lack of grating lobes in the array pattern. , the current array antennas are difficult to achieve

Method used

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  • Arrangement method of ultra-wideband overall-caliber array antenna
  • Arrangement method of ultra-wideband overall-caliber array antenna
  • Arrangement method of ultra-wideband overall-caliber array antenna

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Embodiment 1

[0054] This embodiment provides a technical solution: an array method for an extremely wideband integrated aperture array antenna, comprising the following steps:

[0055] S1: frequency band division

[0056] The working frequency band of the centennial frequency is divided into three ultra-wideband frequency bands: high, medium and low. The array antennas of the low frequency band and the middle frequency band are sparsely arranged, and the array antennas of the high frequency band are arranged in a tightly coupled array.

[0057] S2: low frequency band array antenna sparse array

[0058] The ultra-wideband sparse array optimization algorithm is used to sparsely arrange the low-frequency antenna elements in the global aperture plane, which is the area where the three frequency band array antennas are arranged together.

[0059] The sparse array optimization algorithm adopted in the present invention is a population-based evolutionary strategy, which guides the population to ...

Embodiment 2

[0086] like Figure 1-13 As shown, in this implementation, the extremely wideband comprehensive aperture array antenna array method of the present invention is used to realize the 0.3-30 GHz array antenna design. It is required to have the function of two-dimensional scanning ±45° within the aperture area of ​​not more than 3m×3m.

[0087] S1: frequency band division

[0088] The overall bandwidth of the 0.3-30GHz array antenna has reached 100:1. Considering the ultra-wideband sparse layout optimization bandwidth limit and the principle of common frequency band division, the frequency band is divided into three segments, namely 0.3-2GHz, 2-12GHz and 12-30GHz. The bandwidth of each array antenna shall not exceed 7:1.

[0089] S2: low frequency band array antenna sparse array

[0090] First, the number of antenna elements of the 0.3-2GHz array antenna is obtained as the initial value of the sparse array optimization algorithm through the formula (2) in Embodiment 1, and then ...

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Abstract

The invention discloses an arrangement method of an ultra-wideband overall-caliber array antenna, belonging to the technical field of antennas. The method comprises the following steps: S1, frequencyband division; S2, arrangement of a low-frequency-band array antenna; S3, selection of a medium-frequency-band array antenna arrangement area and arrangement of a medium-frequency-band array antenna;and S4, selection of a high-frequency-band array antenna arrangement area and arrangement of a high-frequency-band array antenna. According to the invention, an antenna array with a hundred-time frequency range can employ a small number of units as much as possible in a limited aperture, the advantages of low sidelobe, high gain and large-angle scanning are guaranteed at the same time, and the problem that the bandwidth of a conventional tight-coupling ultra-wideband array antenna is limited by the spacing of array units with maximum grating lobes is effectively solved; and compared with a traditional frequency-band-divided common-caliber antenna, the array antenna of the invention has the advantages that antennas of different frequency bands are nested with each other, the number of the antennas and a caliber area are reduced, and cost is saved.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a method for arranging an ultra-wideband integrated aperture array antenna. Background technique [0002] With the continuous improvement of antenna requirements, ultra-wideband and large-angle scanning antennas are an important development direction for antenna engineering applications, especially ultra-wideband array antennas with bandwidths exceeding one hundred times the frequency. Most of the traditional ultra-wideband array antennas adopt the form of tightly coupled array antennas. The bandwidth of this antenna exceeds 10:1, whether the antenna unit itself cannot achieve such a large bandwidth, or the spacing between the array units is limited by the lack of grating lobes in the array pattern. , the current array antennas are difficult to achieve. [0003] In order to solve the above problems, an array method of extremely wideband integrated aperture array antenna is prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/00H01Q21/24G06F30/27
CPCH01Q21/0087H01Q21/24G06F30/27
Inventor 王杰张小林王亚茹王一杰李鹏方佳金谋平朱庆超苗菁
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST