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A rcs reduction method for phased array antenna

A phased array antenna and array element technology, which is applied to antenna combinations, antennas, antenna arrays and other directions with different interactions to achieve the effect of easy implementation, easy design and convenient connection

Active Publication Date: 2018-07-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are currently very limited reports on how to compromise between the radiation and scattering performance of the array, and how to integrate various RCS control technologies.

Method used

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  • A rcs reduction method for phased array antenna
  • A rcs reduction method for phased array antenna
  • A rcs reduction method for phased array antenna

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings

[0028] like figure 1 , figure 2 As shown, taking a circularly polarized microstrip antenna as an example, its antenna array 1 consists of N circularly polarized microstrip antenna elements 2, where N is the number of array elements, of course, it is not limited to figure 1 The 8x8 array elements shown, the feeding points 3 of the microstrip antenna unit 2 are regularly arranged in a rectangular grid shape, and the spacings of the feeding points 3 in the x and y directions are dx and dy, respectively, The microstrip antenna unit 2 is randomly rotated around the feeding point 3 by an angle φ.

[0029] Further, the random rotation is in pairs. Specifically, the array elements are randomly divided into two groups, each group has N / 2 array elements, and each array element in the first group of array elements is randomly divided. Rotation, and the rotation angle of any ...

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Abstract

The invention relates to the field of microwave antenna array design, in particular to an RCS reduction method for phased array antennas. The method of the present invention mainly includes: assuming that the phased array antenna includes N array elements, there are N feed points correspondingly, and the N feed points are regularly arranged in a rectangular grid; and then each array The element is randomly rotated by an angle around its own feed point. The beneficial effect of the present invention is that the RCS of the array can be greatly reduced without substantially losing the radiation performance of the array; the RCS reduction can be realized only by the random rotation of the array elements, compared with the traditional measures such as adopting structural shaping, loading radome, etc. , easier to design, easier to implement, easier to process, and lower in cost; at the same time, the array element rotates around the feed point. Although the array element is irregular, it retains the regular arrangement structure of the feed point, so it basically does not increase the difficulty of processing. And cost, it also facilitates the connection of the array antenna and the back-end T / R components, which is in line with the phased array application.

Description

technical field [0001] The invention relates to the field of microwave antenna array design, in particular to an RCS reduction method for a phased array antenna. Background technique [0002] Phased array antennas are one of the key components of modern aircraft. A high-performance phased array antenna not only requires high radiation characteristics, but also requires low RCS (Radar Cross-Section, radar cross section) characteristics. At present, there are many methods to reduce the RCS outside the operating frequency band of the phased array antenna, but the theory and technology of the in-band reduction (that is, the RCS reduction under the premise of ensuring the antenna radiation performance within the operating frequency band) are relatively lacking. [0003] In recent years, all countries have taken the electromagnetic stealth performance of flight carriers as one of their most important performance indicators. A good aircraft should not only have flexible maneuveri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q21/00H01Q21/29
CPCH01Q21/0006H01Q21/29
Inventor 杨鹏闫飞
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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