L-shaped sub-array utilization method

A technology of shape sub-array and antenna sub-array, which is applied in the application field of L-shaped sub-array to achieve the effect of wide application range, small scale and non-single array form.

Active Publication Date: 2016-04-13
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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Problems solved by technology

[0005] In order to solve the problem of grating lobes in the antenna pattern caused by the reduction of active components in the active phased array antenna and improve the performance of the active phased array radar system, the present invention proposes an L-shaped sub-array application method

Method used

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Embodiment 1

[0064] see Figure 6 , splicing the square sub-array modules into a 12*20 rectangular antenna array by randomly selecting them from the equipment library. Each square antenna sub-array module has a total of 4*4 antenna elements, so 15 modules are required. After determining the layout scheme of the rectangular antenna array, select one of the above five phase centers as the phase center of the L-shaped sub-array of the rectangular antenna array.

[0065] see Figure 9-10 , the figure is the direction diagram of the angle of view of the two main tangent planes of the rectangular antenna array at the antenna element spacing λ / 2 (half the working wavelength), and the phase center is taken as Figure 4 In 4a—the No. 1 antenna element of the L-shaped sub-array is used as the phase center of the L-shaped sub-array. Theoretically, the spacing between subarrays is equal to 1 wavelength, which is greater than the theoretical unit spacing where no grating lobes can be detected by pat...

Embodiment 2

[0067] Similar to Embodiment 1, a 16*16 square antenna array is assembled by using the square sub-array modules in the equipment library. Each square antenna sub-array module has 4*4 antenna elements, so 16 modules are required.

[0068] see Figure 11-12 , the figure is the direction diagram of the angle of view of the two main tangent planes of the square antenna array at the antenna element spacing λ / 2 (half the working wavelength), and the phase center is taken as Figure 4 In 4a—the No. 1 antenna element of the L-shaped sub-array is used as the phase center of the L-shaped sub-array. Theoretically, if the spacing between sub-arrays is greater than 1 wavelength, grating lobes will appear after pattern scanning, but no grating lobes can be seen in the calculation results.

Embodiment 3

[0070] Similar to Embodiment 1, a circular antenna array is assembled by using the square sub-array modules in the equipment library. The circular antenna array requires 13 modules.

[0071] see Figures 13 to 14 , the figure is the direction diagram of the angle of view of the two main tangent planes of the rectangular array at the antenna element spacing λ / 2 (half the working wavelength), and the phase center is taken as Figure 4 In 4a—the No. 1 antenna element of the L-shaped sub-array is used as the phase center of the L-shaped sub-array. Theoretically, if the spacing between sub-arrays is greater than 1 wavelength, grating lobes will appear after pattern scanning, but no grating lobes can be seen in the calculation results.

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Abstract

The invention provides an L-shaped sub-array utilization method, wherein the L-shaped sub-array is provided with four antenna units. The L-shaped sub-array utilization method comprises the following steps of 1), establishing a square antenna sub-array module; 2) establishing a module equipment database; 3), splicing for forming an objective antenna array; and 4) defining the phase center of a single L-shaped sub-array. Compared with the prior art, the L-shaped sub-array utilization method is advantageous in that the boundary rule of the square antenna sub-array module which is composed of four L-shaped sub-arrays facilitates mounting of various planar arrays and realizes easy engineering realization; combination of ten splicing methods of the square antenna sub-array module and the selection mode for the phase center of the L-shaped sub-array can obtain an array antenna phase center distribution with high randomness, thereby greatly weakening an array antenna radiation pattern grating lobe; and the square antenna sub-array module has a small scale and can be conveniently assembled for forming the planar arrays in different forms, thereby realizing non-single array surface form and wide application range.

Description

technical field [0001] The invention belongs to the technical field of array antennas, and in particular relates to an application method of an L-shaped sub-array. Background technique [0002] With the rapid development of active phased array radar technology, system requirements such as higher power and higher resolution guide the development of active phased array antennas in the direction of electrical large size and broadband operation (the electrical size is the physical size of the antenna Dimensions relative to the operating frequency wavelength). The active phased array antenna changes the feeding phase of the antenna unit through active components (such as: delay amplification component, T / R component) to realize antenna array beam scanning. With the continuous expansion of the electrical size of the antenna array, the number of active components of the antenna is also increasing. Due to the high price of the active components, the cost of the antenna array is dou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/00
CPCH01Q21/0087
Inventor 孙立春侯田张洪涛汪伟金谋平邹永庆
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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