Radar cross section reducing surface, radar and vehicle
A radar scattering cross-section and area technology, applied in the field of radar stealth, can solve the problems of reducing radar scattering cross-section, narrow electromagnetic wave frequency bandwidth, etc.
Active Publication Date: 2020-10-20
福瑞泰克智能系统有限公司
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Problems solved by technology
In this way, the phase difference of electromagnetic waves reflected by PEC and AMC is 180°, which can realize the cancellation of reflected electromagnetic waves, thereby reducing the RCS of conventional dielectric substrates. However, in this way, the frequency bandwidth of electromagnetic waves is relatively narrow, and it can only be aimed at one incident angle.
like figure 2 The shown provides an AMC-AMC checkerboard structure. Two AMCs——AMC1 and AMC2 are used to form a checkerboard structure. Through the design, the reflection phases of the two AMCs can differ by 180° at a certain frequency point. In this way, the The radar cross section of a small conventional dielectric substrate, but this structure is only for one angle of incidence
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[0041] In order to make the purpose, technical solution and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiment is only one embodiment of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
[0042] The "embodiment" referred to herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present application. In the description of the embodiments of the present application, it should be understood that the terms "first", "second", "third" and "fourth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importa...
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The embodiment of the invention discloses a radar cross section reducing surface, a radar and a vehicle. The surface comprises a metal ground layer, a dielectric layer and an artificial magnetic conductor AMC layer from bottom to top. The AMC layer at least comprises four areas which are shaped like a Chinese character 'tian' and have the same area, wherein the number of the areas is the same. TheAMC patches are arranged to form an N * N structure. The sizes of the AMC patches in one area are the same. The distances between the adjacent AMC patches are equal. The patch standards correspondingto the AMC patches in the two areas where one diagonal line is located are the same. The patch standards corresponding to the AMC patches in the two areas where the other diagonal line is located aredifferent, the patch standards corresponding to the AMC patches in any two adjacent areas are different, and the patch standards comprise patch sizes and distances between the adjacent patches. Basedon the embodiment of the invention, the reflection electromagnetic wave of the surface can be reduced, and the RCS of the radar provided with the surface is further reduced.
Description
technical field [0001] The invention relates to the technical field of radar stealth, in particular to a surface radar with reduced radar scattering cross section and a vehicle. Background technique [0002] As a core sensor in the car's intelligent driving system, the performance of the millimeter-wave radar plays a key role in the safety of the car. Generally, the radar cross section (RadarCross Section, RCS) of the conventional dielectric substrate used for automotive radar is large, which will cause the electromagnetic waves emitted by the antenna to form multiple reflections between the radome and the antenna surface, which will cause the radiation pattern of the antenna to change. Deterioration will eventually affect the performance of the radar system. [0003] In the prior art, the dielectric substrate adopts a traditional checkerboard structure, such as figure 1 A conventional dielectric substrate with a PEC-AMC checkerboard structure is shown, which is composed o...
Claims
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Login to View More IPC IPC(8): H01Q15/14G01S13/88
CPCH01Q15/145G01S13/88
Inventor 范朝洋赵宇楠
Owner 福瑞泰克智能系统有限公司