Design Method of Parabolic Reflector Antenna with Compact Planar Structure Based on Metamaterials
A parabolic reflector, reflector antenna technology, applied in the direction of antenna, radiating element structure, electrical components, etc., can solve the problems of maintaining the antenna unchanged, affecting the performance of the antenna, inconvenient debugging and use of the reflector antenna, and saving space. , Eliminate the influence of the antenna performance, the effect of the flat compact structure
Active Publication Date: 2018-08-03
SHANGHAI NORMAL UNIVERSITY
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Problems solved by technology
Such a structure makes the reflector antenna inconvenient in installation, debugging and use, and because the reflector and the feed are separated from each other in space, the possible shading between them will significantly affect the performance of the antenna
However, from the perspective of traditional reflector antenna design, an effective method has not yet been found to design a reflector antenna with a compact planar structure that can keep the antenna characteristics basically unchanged (compared with conventional parabolic reflector antennas).
Method used
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[0033] The spatial mapping of the feed unit is as figure 1 Shown, given by formula (1) and formula (2).
[0034] The coordinate transformation function in formula (1) is specifically taken as
[0035]
[0036] The coordinate transformation in formula (2) is calculated separately in the first and fourth quadrants. In the first quadrant, that is, AC'D is specifically taken as
[0037]
[0038] The fourth quadrant part, that is, BC'D, is specifically taken as
[0039]
[0040] The material parameters of each part of the feed unit can be calculated by using formula (3). The parameter in ABC' is
[0041]
[0042] The parameter in AC'D is
[0043]
[0044]
[0045] The parameter in BC'D is
[0046]
[0047]
[0048]The material parameters of the dielectric layer of the parabolic reflector with planar structure are
[0049]
[0050]
[0051]
[0052]
[0053] Where p is the focal length of the standard parabolic equation, a is the thickness ...
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The invention discloses a design method of a compact planar structure parabolic reflector antenna based on metamaterials, which includes the following steps: using the principle of transformation electromagnetics to design a feed source unit with a planar boundary; using a planar structure parabolic reflector to replace the conventional The parabolic reflector with curved surface structure is used as the reflecting surface of the reflector antenna; the planar reflector and the feed unit are combined to design a compact planar reflector antenna. The reflection surface of the present invention adopts a planar reflector, and its reflection characteristics are equivalent to conventional parabolic reflectors; the designed feed unit itself is "transparent" to the rays, that is, it does not block the rays, and the feed source placed therein is due to The virtual displacement effect produced by the metamaterial is equivalent to the radiation characteristic of the feed source placed far away from the reflecting surface; the reflector and the feed unit in the reflector antenna are combined to form a compact structure, which avoids the The separation of the reflector from the feed in conventional reflector antennas.
Description
technical field [0001] The invention belongs to the field of electromagnetic / optical device design. It relates to a theoretical design method of a parabolic reflector antenna with a compact planar structure. The designed reflector antenna is suitable for microwave, millimeter wave, terahertz and other frequency bands. Background technique [0002] As a broadband high-gain antenna, reflector antennas are widely used in satellite communications, radar, remote sensing, and radio astronomy. Its basic structure consists of two parts: reflector and feed. A reflector antenna whose reflective surface is a parabola (parabolic reflector antenna) is the most commonly used form. [0003] The characteristics of the parabolic reflector antenna are mainly determined by its geometrical optical characteristics: the beam emitted at the focus is collimated after being reflected by the reflector, and the reflected beam propagates parallel to the main axis of the reflector; all the path lengt...
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IPC IPC(8): H01Q19/10H01Q15/14H01Q1/36
Inventor 罗阳朱守正
Owner SHANGHAI NORMAL UNIVERSITY