Phased-array antenna unit with flat-top directional diagram characteristics

A phased array antenna and pattern technology, which is applied to antennas, antenna arrays, electrical components, etc., can solve problems such as the appearance of grating lobes and the increase of array gain drop, so as to suppress grating lobes, improve array gain, and ensure position accuracy. Effect

Inactive Publication Date: 2014-07-30
LINGBAYI ELECTRONICS GRP
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Problems solved by technology

However, such a design will cause an increase in the array gain drop at the scanning edge and grating lobes will appear during the scanning process.

Method used

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  • Phased-array antenna unit with flat-top directional diagram characteristics
  • Phased-array antenna unit with flat-top directional diagram characteristics
  • Phased-array antenna unit with flat-top directional diagram characteristics

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Embodiment Construction

[0024] The infinite array method is an effective method for analyzing large phased arrays, mainly analyzing the radiation characteristics of the array and the active pattern of the elements in the array environment. The pattern of the active unit can reflect the radiation characteristics of many arrays, such as the variation of the array scanning gain, the scanning blind spot of the array, and so on. In engineering applications, in order to reduce the size of the analysis model, the small array method is often used. Small arrays generally have odd rows and odd columns. is large enough, the pattern of the center unit of the small array is the pattern of the active unit. When a large phased array adopts a rectangular grid, the row spacing and column spacing are both 1.27 wavelengths (center frequency), and the limited scanning range is ±10°, the calculated grating lobe appears outside the ±35° area from the normal direction of the array , in order to reduce the gain fluctuation...

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Abstract

The invention provides a phased-array antenna unit with flat-top directional diagram characteristics. The phased-array antenna unit comprises a metallic waveguide area and a free space area, wherein the metallic waveguide area is composed of a cylindrical waveguide and a conical waveguide connected with the cylindrical waveguide, a micro-strip plate laminating cylinder conformal array used for achieving flat-top wave beam unit directional diagram shape design through slot coupling is arranged on a port of the conical waveguide, evenly distributed eccentric round metal sheets are etched on each layer of micro-strip plates and arranged into a matrix, an light insulator is arranged on a cascaded superposition slot area of every two adjacent micro-strip plates, and then a free space area multi-layer conformal array unit is formed. The phased-array antenna unit has the advantages that the structure is simple, rotary symmetry is adopted for the structure, directional diagram equalization performance is good in the electric aspect, the unit can be applied to both linear polarization and circular polarization, external grating lobes generated during array scanning can be effectively restrained, margin gain of scanning can be improved, and the design method can be applied to a limited scanning two-dimensional phased-array antenna unit with a wide scanning range.

Description

technical field [0001] The invention relates to a high-efficiency antenna with flat-top pattern characteristics, especially an antenna unit that can form a limited scanning two-dimensional phased array. Background technique [0002] Array unit, feed network, T / R component, phase shifter and wave control machine are the five basic components of an active phased array antenna. The cost of the large two-dimensional solid-state active phased array radar antenna phase shifter and T / R components accounts for almost 70% to 80% of the entire radar. In order to reduce the cost, it is necessary to reduce the number of units as much as possible under the premise of ensuring the performance of the antenna. Using limited scanning array antenna, increasing the element spacing is an effective way to reduce the number of elements and reduce the cost. In the finite scanning phased array antenna system, the design of the antenna element is particularly critical. On the one hand, because th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/00H01Q1/38H01Q13/02
Inventor 许小玲赵玉国汪波陈超万强钱俊辉卿海陈斌
Owner LINGBAYI ELECTRONICS GRP
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