Electrical scanning lens antenna based on multilayer conformal Fresnel surface
A lens antenna and electronic scanning technology, which is applied in the direction of antenna, antenna grounding switch structure connection, electrical components, etc., can solve the problem of high cost of phased array antenna, achieve stable gain and wide application range
Active Publication Date: 2019-06-28
ZHEJIANG UNIV
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Problems solved by technology
However, due to the complicated feeding methods and phase shifting devices, the cost of phased array antennas remains high
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[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.
[0032] Such as figure 1 As shown, the lens antenna is mainly composed of an antenna feed 1 and a multi-layer conformal surface 2, the antenna feed 1 is located in the center of the multi-layer conformal surface 2, and the multi-layer conformal surface 2 forms a cylindrical surface around the antenna feed 1 The multi-layer conformal surface surrounds the antenna feed, and the phase compensation of the beam emitted by the antenna feed is performed by the multi-layer conformal surface, so as to achieve reconfigurability.
[0033] Such as figure 1 As shown, the multilayer conformal surface 2 is mainly composed of a dense periodic array of multilayer conformal surface units 11, each multilayer conformal surface unit 11 is composed of a single layer of frequency selective surface 12, and the frequency selective surface 12 is Curved curved surface.
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The invention discloses an electrical scanning lens antenna based on a multilayer conformal Fresnel surface. The lens antenna is mainly composed of an antenna feed source and a multilayer conformal surface. The antenna feed source is located at the center of the multilayer conformal surface. The multilayer conformal surface surrounds the antenna feed source to form a cylindrical shape. The multilayer conformal surface is mainly composed of multilayer conformal surface units which are closely arranged. Each multilayer conformal surface unit is composed of stacked single frequency selective surface layers. The frequency selective surface is a curved arc surface. In the frequency selective surface, a dielectric substrate is a curved plate, a double I-shaped interdigital structure is disposedat the center on the surface of a side of the dielectric substrate, and the two interdigitated metal in the double I-shaped interdigital structure are connected by a varactor diode. The electrical scanning lens antenna controls the frequency compensation function of the frequency selective surface to form a Fresnel phase compensation diffraction fringe, and performs behavior modulation on the electromagnetic wave emitted by the antenna feed source to achieve an omnidirectional scanning function.
Description
technical field [0001] The invention belongs to the field of reconfigurable antennas based on multi-layer conformal surfaces, and discloses a reconfigurable electronic scanning lens antenna for omnidirectional scanning. Background technique [0002] Phased array antennas have a wide range of applications because of their ability to control beams. However, due to the complex feeding methods and phase shifting devices, the cost of phased array antennas remains high. In view of this, the multi-layer surface is used to modulate the beam emitted by the antenna feed to form Fresnel fringes, and then control the beam, which can avoid the design of complex phase-shifting circuits and other feed circuits, reduce design and production costs, and at the same time can Obtain some performance better than traditional phased array antennas. [0003] The basic principle of beam modulation by using multilayer surface is that each unit of multilayer frequency selective surface can apply an ...
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IPC IPC(8): H01Q3/46H01Q1/36H01Q1/38H01Q1/50
Inventor 马超李欢叶德信皇甫江涛冉立新
Owner ZHEJIANG UNIV