Offset-feed type radar antenna
A radar antenna and feed-type technology, which is applied in the field of bias-feed radar antennas, can solve the problems of complex production process and complex process of parabolic antenna, and achieve the effect of avoiding influence, eliminating complex manufacturing process and simple structure.
Active Publication Date: 2013-03-13
KUANG CHI INST OF ADVANCED TECH +1
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Problems solved by technology
[0006] The purpose of the present invention is to overcome the problem of complex production process of manufacturing parabolic antenna in the prior art, and provide a kind of offset radar antenna, which proposes a radar antenna with a simple structure and a flat reflector. The antenna has the advantage that the parabolic antenna can receive or transmit electromagnetic waves in a directional manner, and at the same time avoids the complicated process of producing the parabolic antenna
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[0033] The present invention will be described in further detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0034] figure 2 with image 3 It is a structural schematic diagram of the bias-fed radar antenna of the present invention, and the antenna includes a feed source 10, a metamaterial panel 20, and a reflector 30, and the feed source 10 and the emitter panel 30 are respectively located on both sides of the metamaterial panel 20, reflecting The plate 30 is closely connected with the metamaterial panel 20 , and the orthographic projection of the point where the feed source 10 is located on the metamaterial panel 20 is the midpoint of the bottom edge of the metamaterial panel 20 .
[0035] Usually, the electromagnetic wave radiated from the feed source 10 is a spherical electromagnetic wave, but the far-field direction performance of the spherical electromagnetic wave is not...
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The invention relates to an offset-feed type radar antenna, which comprises a feed source, a metamaterial panel and a reflection plate. The feed source is positioned at the other side of the metamaterial panel and is in a non-aligned area of the metamaterial panel. The metamaterial panel comprises a plurality of core layers with same refractive index distributions. Each core layer comprises a plurality of metamaterial units. Each metamaterial unit comprises a unit substrate and an artificial micro-structure. According to the offset-feed type radar antenna disclosed by the invention, by utilizing the convergence characteristic of the metamaterial on electromagnetic wave, the radar antenna is independent of the shape of electromagnetic convergence equipment; the complex manufacture process for processing the traditional parabolic antenna is saved; simultaneously, the advantage of the traditional parabolic antenna to directionally receive or transmit electromagnetic wave can be realized; furthermore, because the offset-feed type radar antenna is adopted, the feed source cannot block radiation of the electromagnetic wave any longer; and the influence of the radiation electromagnetic wave on the feed source is also avoided.
Description
technical field [0001] The invention relates to the field of radar antennas, in particular to a bias-feed radar antenna using metamaterials. Background technique [0002] The radar antenna converts the spherical wave radiated by the feed source into a plane wave through the reflector, so as to realize directional reception or emission of electromagnetic waves. The reflector currently used is in the shape of a parabola, and the feed source is located near the focus of the reflector. [0003] The working principle of the radar antenna is similar to that of an optical mirror. The existing radar parabolic antenna is as figure 1 As shown, it includes a collapsible source 1, a parabolic reflector 2 and a bracket 3. A feed 1 for transmitting or receiving electromagnetic waves is placed at the focus of the parabolic reflector 2. Using the focusing characteristics of the parabolic reflector 2, the The spherical wave is reflected by the parabolic reflector 2 and converted into a plan...
Claims
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IPC IPC(8): H01Q15/00H01Q15/23H01Q19/06H01Q19/10
Inventor 刘若鹏季春霖岳玉涛宿超
Owner KUANG CHI INST OF ADVANCED TECH