Reconfigurable metasurface electric scanning array antenna based on opening square ring

Abstract

The invention discloses a reconfigurable metasurface electric scanning array antenna based on an opening square ring, and belongs 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, each digital radiation unit comprises a dielectric layer and a radiation layer, an opening square ring radiation structure formed by radiation patches is arranged in each radiation layer, an electric switch is arranged on each radiation patch, and a direct-current bias circuit used for controlling on-off of each electric switch is arranged in each dielectric layer. According to the array antenna, the reflection phase or the reflection phase of each digital radiation unit on the electromagnetic surface is adjusted by using a digital control device, the whole surface is irradiated from the space by using a horn feed source, and the phase of each unit on the surface is adjusted in a digital control mode, therefore, high-gain focused dynamic scanning wave beams, agile wave beams or multiple wave beams are obtained.

Description

technical field [0001] The invention relates to the technical field of array antennas, in particular to a reconfigurable metasurface electronically scanned array antenna based on an open square ring. Background technique [0002] At present, beam reconfigurable array antennas with high-gain beam scanning characteristics have been widely used in various fields. The existing high-gain beam scanning antennas mainly include mechanical rotating parabolic antennas and electronic scanning phased array antennas. [0003] 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. The electronically scanned phased array antenna can better overcome the above-mentioned shortcomings. It has the advantages of fast scanning speed and more flexible performance, and the planar or conformal struct...

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Problems solved by technology

[0004] However, the design of the feed network of the electronically scanned phased array antenna is relatively complicated, especially when the antenna diameter increases, the feed loss is high, the radiation efficiency of the antenna is low, and the achievable gain is limited

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 the large-scale application of electronically scanned phased array antennas

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