Reconfigurable metasurface electric scanning array antenna based on double circular ring units

Abstract

The invention discloses a reconfigurable metasurface electric scanning array antenna based on double circular ring units, and relates to the technical field of array antennas. The antenna comprises a feed source and an array antenna assembly, the array antenna assembly comprises a plurality of digital radiation units, and the feed source is used for providing a space irradiation source for the array antenna assembly and receiving scattered electromagnetic waves of the array antenna assembly; each digital radiation unit comprises a dielectric layer and a radiation layer, the radiation layer is internally provided with a double-ring radiation structure formed by radiation patches, digital electric switches are embedded in the radiation patches, and the dielectric layer is internally provided with a direct-current bias circuit used for controlling on-off of the digital electric switches. The antenna is simple in structure, low in profile, light in weight, easy to conform and low in cost, and has the advantages of being small in feed loss, high in beam scanning speed and high in array scale expansibility.

Description

technical field [0001] The present invention relates to the technical field of array antennas, in particular to a reconfigurable metasurface electronically scanned array antenna based on double circular ring units. Background technique [0002] Beam reconfigurable array antennas with high-gain beam scanning characteristics have a wide range of applications in various fields. The existing high-gain beam scanning antennas mainly include mechanical rotating parabolic antennas and electronically controlled phased array antennas. Among them, the rotating parabolic antenna has the advantages of simple structure, low cost, and high efficiency, but its shape is a special curved surface, bulky, heavy, and the beam scanning speed is slow, and the servo system requires high requirements. [0003] Electronically scanned phased array antenna can better overcome the above shortcomings. It not only has fast scanning speed and more flexible performance, but also has a planar or conformal s...

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Problems solved by technology

[0003] Electronically scanned phased array antenna can better overcome the above shortcomings. It not only has fast scanning speed and more flexible performance, but also has a planar or conformal structure that is more conducive to maintaining conformality with the carrier. However, the design of its feed network is complicated, especially when the antenna When the aperture increases, the feed loss is higher, the radiation efficiency of the antenna is lower, and the achievable gain is limited

However, although the introduction of solid-state transceiver components in the unit can reduce the feed loss, the cost and weight of the system will be greatly increased, which limits its large-scale application

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