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RCS controllable Luneberg lens reflector based on active frequency selective surface

A technology of frequency selective surface and Lunberg lens, which is applied in the field of electromagnetic field and microwave, can solve the problem of uncontrollable RCS size and achieve the effect of novel concept and high application value

Active Publication Date: 2020-11-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally, the reflective surface of Lunberg lens reflector is metal, so its RCS size is uncontrollable

Method used

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  • RCS controllable Luneberg lens reflector based on active frequency selective surface
  • RCS controllable Luneberg lens reflector based on active frequency selective surface
  • RCS controllable Luneberg lens reflector based on active frequency selective surface

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0025] This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.

[0026] The invention discloses an RCS controllable Lunberg lens reflector based on an active frequency selective surface, which comprises a Lunberg lens and a reflector, the Lunberg lens is spherical, and the curvature of the reflector matches the Lunberg lens. The Longbo lens contains N layers of dielectric layers from the inside to the outside, and the relative permittivity of the N layers of dielectric layers decreases sequentially from the inside to the outside, and N is a natural ...

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Abstract

The invention discloses a RCS controllable Luneberg lens reflector based on the active frequency selective surface. The reflector comprises a Luneberg lens and a reflecting plate, and the curvature ofthe reflecting plate is matched with that of the Luneberg lens. The Luneberg lens is spherical and comprises N dielectric layers with the relative dielectric constants decreasing in sequence from inside to outside. The reflecting plate comprises a plurality of AFSS reflecting units which are distributed in an array mode, and the AFSS reflecting units have the transmission function and the reflection function and can be switched. According to the Luneberg lens reflector, the AFSS reflecting surface is used for replacing a metal reflecting surface of a common Luneberg lens reflector. The stateof PIN diodes of an AFSS reflecting surface and the conduction and cut-off number of the PIN diodes are controlled through external DC voltage. The AFSS reflecting surface can be switched between a transmission state and a reflection state, and the reflection intensity of the AFSS reflecting surface is controlled, so that the size of the RCS of the Luneberg lens reflector is adjustable.

Description

technical field [0001] The invention relates to the technical field of electromagnetic field and microwave, in particular to an RCS controllable Lunberg lens reflector based on an active frequency selective surface. Background technique [0002] Radar Cross Section (RCS) is a physical quantity that measures the ability of a target to scatter radar waves. It is defined as 4π times the ratio of the power scattered by the target towards the receiving direction in a unit solid angle to the power density of the plane wave incident from a given direction to the target. . With the development of radar detection and stealth technology, it is sometimes necessary to enhance RCS in both military and civilian applications. Lunberg lens reflectors can be used to enhance target RCS. It is the most common passive RCS enhancer with long service life and wide application . A Luneberg lens reflector consists of a Luneberg lens and a reflective surface. The Luneburg lens was first proposed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/122G02B7/182H01Q15/02H01Q19/06
CPCG02B5/122G02B7/182H01Q15/02H01Q19/06
Inventor 吴东辉曹群生曹帅方小星
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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