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High-efficiency sidelobe suppression linear array antenna based on three-section hybrid drive

A hybrid drive and linear array technology, applied in advanced technology, radio transmission system, transmission monitoring, etc., can solve the problems of increasing the array aperture, increasing the upper limit power of the power amplifier, and reducing the radiation efficiency, so as to achieve strong engineering realization and reduce The effect of capping power and reducing the number of channels

Active Publication Date: 2022-04-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, there is still a problem with uneven sub-array division: at the sub-array level, the corresponding indicators are only achieved through simple amplitude and phase regulation, which will cause the power of each channel to be different, the upper limit power of the power amplifier will increase, and the specifications will increase. Overall system complexity and cost
However, it increases the aperture of the array and reduces the radiation efficiency

Method used

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  • High-efficiency sidelobe suppression linear array antenna based on three-section hybrid drive
  • High-efficiency sidelobe suppression linear array antenna based on three-section hybrid drive
  • High-efficiency sidelobe suppression linear array antenna based on three-section hybrid drive

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example

[0082] In this example, the number of array elements is 20, the array element spacing is 0.5λ, and the beams are 90°, 100°, 110° and 120°, respectively, and the uniformly spaced linear array is divided into three-segment sub-arrays. Considering the engineering realizability, in the example, four cases are adopted: one driving two at the front and one at the front, two at the front and three at the last one; three at the front and three at the last one; three at the front and one driving at the end. The following example is analyzed from the situation of one driving two at the front and one driving three at the end.

[0083] The configuration of the array is: the number of array elements N=20, the distance between array elements d=0.5λ, the number of channels Q=17 for the three-stage hybrid drive, and the number of scanning beams S=4; the first two array elements are combined into one channels, the last three array elements are merged into one channel, and each unit in the midd...

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Abstract

The invention discloses a high-efficiency sidelobe suppression linear array antenna based on three-section hybrid drive, and the antenna comprises the following steps: 1, setting the number of array elements, array element spacing and a three-section hybrid drive channel division mode according to the demands of gain, scanning range and expected channel number; 2, initializing normal excitation, and establishing a phase compensation model to obtain initial excitation of each beam; step 3, utilizing an iterative convex optimization algorithm to establish an iterative model of a channel power average value and a compensation phase, so that the power of each channel is the same, and the maximum sidelobe level of all beams is minimized; and step 4, performing phase-only optimization on each wave beam to obtain excitation of the wave beam when the wave beam meets the minimum sidelobe level. According to the invention, three-section hybrid driving can be utilized in the linear array, the number of channels is reduced, the power of each channel is ensured to be the same, the upper limit power of the required power amplifier is reduced, the cost of the system is reduced, and the beam scanning function of sidelobe suppression is efficiently realized.

Description

【Technical field】 [0001] The invention relates to the technical field of radar phased array antennas, in particular to a high-efficiency sidelobe suppression linear array antenna based on a three-stage hybrid drive 【Background technique】 [0002] In order to meet the requirements of ultra-wideband, high gain, low sidelobe, and wide-angle scanning, the scale of phased array antennas is getting larger and larger, and the number of array elements is also increasing, resulting in a significant increase in the complexity and cost of hardware design. However, in practical engineering, due to factors such as the non-continuous change of the excitation amplitude and the cost of the feed network, it is almost impossible to precisely control the position of each unit and the excitation amplitude and phase in a large-scale array. In response to this problem, through decades of research, domestic and foreign scholars have proposed a sub-array division technology that can divide a large-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0456H04B7/0408H04B17/391
CPCY02D30/70
Inventor 刘颜回肖凡吴攀杨仕文胡俊聂在平
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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