Super-surface-based convex conformal vortex field reflector antenna
A metasurface and vortex field technology, applied to antennas, electrical components, waveguide horns, etc., can solve problems such as difficult production and processing, inability to load, large phase gradient, etc., and achieve simple structure, easy processing, and improved precision.
Active Publication Date: 2018-12-07
XIDIAN UNIV
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Problems solved by technology
Although this kind of antenna can realize the excitation of the vortex electromagnetic field to a certain extent, it has many shortcomings: first, the array antenna is a planar structure, which cannot be loaded on a convex surface such as a space vehicle; second, the array antenna The phase shift unit of the array antenna is only divided into eight parts, and the phase gradient between adjacent parts is large, so it is impossible to generate vortex electromagnetic waves with high-quality spiral phase distribution; Easy to produce and process
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[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0024] refer to figure 1 , the present invention includes a carrier 1 , a main reflector 2 , a feed source 3 and a supporting structure 4 . The carrier 1 is located at the bottom of the overall structure of the antenna, the main reflector 2 is conformally inlaid on the upper surface of the carrier 1, the carrier 1 adopts a convex structure, and the feed source 3 adopts a pyramidal horn antenna, which is divided into a waveguide part and an angle part, and the waveguide part It is a standard WR51 waveguide, located above the angled part, the opening at the lowermost end of the angled part faces the main reflector 2, and the support structure 4 is used to fix the feed source 3.
[0025] The convex surface structure adopted by the carrier 1 is a convex parabolic cylindrical structure, and bends downward from the center to the edges on both sides ...
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The invention discloses a super-surface-based convex conformal vortex field reflector antenna and mainly aims to solve problems of large phase compensation error, low radiation gain, complicated structure and difficulty in realizing conformal loading of a vortex field reflector antenna in a convex carrier. The super-surface-based convex conformal vortex field reflector antenna comprises a carrier(1), a main reflector (2), a feed source (3) and a supporting structure (4), wherein the convex surface structure is employed by the carrier, the main reflector and the carrier are conformal, the mainreflector is the convex surface structure, the main reflector comprises a main medium layer, a main reflection layer and a main phase regulation layer, the main phase control layer is composed of multiple uniformly-arranged main metal ring microstructures distributed in the integrally spiral shape and is used for generating vortex electromagnetic waves, and the supporting structure is used for fixing a feed source. The super-surface-based convex conformal vortex field reflector antenna is advantaged in that conformal loading of the convex vortex field reflector antenna and the convex carriercan be realized, the vortex electromagnetic waves are efficiently excited, moreover, the antenna phase compensation error is reduced, the structure is simplified, and the super-surface-based convex conformal vortex field reflector antenna can be applied to communication and the radar.
Description
technical field [0001] The invention belongs to the technical field of antennas, and relates to a vortex field reflector antenna, which can be used for imaging and communication. technical background [0002] Because the vortex electromagnetic wave itself carries continuously changing angle information, a vortex field antenna can realize multi-angle irradiation on the target, so in the field of SAR imaging, it can replace multiple transmitting sources to detect the same target from different angles, thus Obtaining a three-dimensional imaging map with higher resolution and better signal-to-noise ratio significantly reduces the cost and complexity of the system, so vortex electromagnetic waves have high potential application value in the field of SAR imaging. On the other hand, because of the good orthogonality between different modes, vortex electromagnetic waves can form a large number of multiplexing channels at the same frequency. When used in the field of communication, t...
Claims
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IPC IPC(8): H01Q13/02H01Q15/00H01Q15/14H01Q15/16H01Q19/19
CPCH01Q13/02H01Q15/0086H01Q15/14H01Q15/16H01Q19/19
Inventor 杨锐高东兴高鸣李冬张澳芳李佳成
Owner XIDIAN UNIV