A Two-Dimensional Fresnel Zone Plate Antenna Based on Planar Aperture Space Feed
An antenna and aperture technology, applied in the field of two-dimensional Fresnel area plate antenna, can solve the problems of high cost, high power consumption, complex power division and feeding network, etc., and achieve the effect of realizing the reconfigurable working frequency
Active Publication Date: 2021-04-06
ZHEJIANG UNIV
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Problems solved by technology
Although phased array antennas have flexible beam steering capabilities, they require complex power division feed networks and digital or analog phase shifting networks, which lead to high costs and high power consumption
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[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.
[0037] Such as figure 1 As shown, the specifically implemented two-dimensional Fresnel zone plate antenna 1 includes a spherical wave feed antenna 2 and a two-dimensional Fresnel zone plate 3, and the spherical wave feed antenna 2 is used to illuminate the two-dimensional Fresnel zone plate 3; two The Vifresnel zone plate 3 is composed of a plurality of adjustable phase units 4 arranged two-dimensionally in a plane, and is realized through a multilayer printed circuit board lamination process.
[0038] Such as figure 2 As shown, each adjustable phase unit 4 includes an upper layer, a three-layer PCB structure, and a lower layer respectively arranged from top to bottom. The upper layer is divided into a metal layer 5 and a dielectric substrate layer 9 from top to bottom. Two rectangular metal patches 6 on the upper surface of the dielectric subs...
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The invention discloses a two-dimensional Fresnel zone plate antenna based on plane aperture space feeding. Including a spherical wave feed antenna and a two-dimensional Fresnel zone plate, the two-dimensional Fresnel zone plate includes a plurality of adjustable phase units arranged in a two-dimensional plane; the adjustable phase unit includes an upper layer, a three-layer PCB structure and a lower layer, an upper layer From top to bottom, it is divided into a metal layer and a dielectric substrate layer. The metal layer includes two rectangular metal patches arranged on the upper surface of the dielectric substrate layer. There is a gap between the two rectangular metal patches, and a varactor diode is welded in the gap. The three-layer PCB structure includes an upper ground metal layer, an upper dielectric layer, an intermediate metal layer, a lower dielectric layer and a lower ground metal layer, and the lower layer is composed of the upper layer arranged in a symmetrical mirror image of the three-layer PCB structure. The present invention can independently control the transmission phase of each unit within a range of 180 degrees, and realize reconfigurable beams such as beam scanning in a relatively large range in the two-dimensional direction of space, and simultaneously realize reconfigurable working frequency.
Description
technical field [0001] The invention belongs to a Fresnel structure antenna in the technical field of two-dimensional beam reconfigurable scanning antennas, and in particular relates to a two-dimensional Fresnel zone plate antenna based on plane aperture space feeding. Background technique [0002] With the rapid development of modern radar and communication systems, in order to achieve multiple purposes such as communication and navigation, the number of antennas required by aircraft, ships, satellites, etc. is increasing. This increases the weight of the antennas, and at the same time, the electromagnetic interference between the antennas is also very large, which seriously affects the normal operation of the antennas. In order to reduce the weight of the antenna loaded on the platform, reduce the cost, reduce the radar cross section of the platform and achieve good electromagnetic compatibility characteristics, it is hoped that one antenna can be used to realize the funct...
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IPC IPC(8): H01Q1/38H01Q1/50H01Q3/34
CPCH01Q1/38H01Q1/50H01Q3/34
Inventor 马超冉立新
Owner ZHEJIANG UNIV