Double-reflecting face antennae with auxiliary face supported by medium wimble
A dual-reflector, medium technology, applied in the directions of antennas, electrical components, circuits, etc., can solve the problems of decreased antenna efficiency, high level of far side lobes, high antenna efficiency, low level of far side lobes, reduced missing effects
Inactive Publication Date: 2009-03-04
北京天瑞星际技术有限公司
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[0005] Part of the electromagnetic wave radiated by the feed horn will be lost from the secondary surface to the secondary surface leakage area, resulting in a decrease in antenna efficiency and a high far side lobe level of the antenna in the secondary surface leakage area
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[0013] The double-reflector antenna supported by the dielectric cone of the present invention, its preferred specific implementation is as follows figure 1 As shown, it includes the main surface 1 and the secondary surface 2. The main surface 1 is provided with a feed horn 3, and the feed horn 3 and the secondary surface 2 are connected through a dielectric material. The electromagnetic wave that the feed horn 3 leaks from the secondary surface 2 Total reflection is formed at the interface formed by the dielectric material and air.
[0014] The dielectric material can be made into a conical dielectric cone 4 , the cone angle of the dielectric cone 4 is connected to the feed horn 3 , and the bottom of the dielectric cone 4 is connected to the secondary surface 2 .
[0015] Such as figure 2 As shown, when light or electromagnetic waves propagate from an optically denser medium (such as a medium) to an optically thinner medium (such as air), reflection and refraction (transmiss...
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The invention discloses a double reflection surface antenna, in which a secondary surface is supported by a medium cone, comprising a main surface and a secondary surface; the main surface is provided with a feeding horn which is connected with the secondary surface by the medium cone; and the electromagnetic wave leaked from the secondary surface of the feeding horn forms total reflection at the interface of the medium cone and the air. The cone angle Alpha of the medium cone is determined by the following regulations: Alpha is equal to or more than 2(Thetaic plus Beta) minus 180 degrees, in the formula, Thetaic is a critical angle of incidence of the medium cone, and Beta is the biggest leaking angle of the electromagnetic wave leaked from the secondary surface of the feeding horn. According to the illuminating angle of the secondary surface to the main surface and the leaking area of the feeding horn of the secondary surface, the dielectric constant Epsilonr and the cone angle of the medium supporting cone are selected reasonably, therefore, not only the gain of the antenna can be increased, but also the far side lobe of the antenna in the leaking area of the secondary surface can be reduced, thus strengthening the capacity of resisting disturbance of the antenna.
Description
technical field [0001] The invention relates to an antenna, in particular to a double-reflection-surface antenna supported by a dielectric cone. Background technique [0002] The double-mirror antenna (reflector antenna) is composed of the main surface, the secondary surface and the feed horn. The secondary surface can be supported on the main surface by a pole, and can be supported on the feed horn by a pole. It is made of metal Although the strut plays the role of supporting the secondary surface structurally, it plays a negative role of shielding electromagnetic waves electrically. [0003] In the prior art, an electrically transparent dielectric material is generally used as the support for the secondary surface, then such a support structure can support the secondary surface, and it is transparent to electromagnetic waves, thereby reducing the impact on electromagnetic waves. block. [0004] There are at least the following disadvantages in the above-mentioned prior a...
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IPC IPC(8): H01Q19/10H01Q19/12H01Q13/02
Inventor 杨建慧徐钦友翟文军颜娟朱蓓鑫
Owner 北京天瑞星际技术有限公司