Design method of four-polarization reconfigurable metasurface antenna

Abstract

The invention discloses a design method of a four-polarization reconfigurable metasurface antenna, and belongs to the field of electromagnetism. The method comprises the following steps: firstly, determining various parameters of a polarization reconfigurable antenna, and designing a rectangular slot to serve as a basic radiation unit of the antenna; then, according to a feed source form selectedby the antenna, determining an analytical expression of the reference wave and a target wave beam, and calculating phase distribution of the reference wave and the target wave Pobj in the surface range of the antenna in Matlab software; and solving an interference phase distribution value of the surface of the antenna by utilizing the reference wave and the target wave beam and combining a holographic method. The setting of the slot unit is determined according to the relationship between the interference phase value at a certain position of the antenna and a threshold value to form an antennaarray, electromagnetic simulation is carried out in HFSS software, and if a radiation beam in a simulation result is consistent with an expected target, on / off control is carried out on each slot unit of the antenna array to obtain a corresponding holographic phase distribution diagram, thereby realizing radiation of beams of four polarizations. According to the invention, stable communication isensured, and insertion loss and design complexity are reduced.

Description

technical field [0001] The invention belongs to the field of electromagnetics, relates to microwave radio frequency and electromagnetic metamaterial technology, in particular to a design method of a four-polarization reconfigurable metasurface antenna. Background technique [0002] The polarization reconfigurable antenna is an antenna with polarization switchable characteristics, that is, by controlling the on-off of the loaded switching device or changing the feeding mode, the current distribution on the surface of the antenna is changed, so that the current in the working frequency and radiation direction Beams with different polarization modes are radiated under the same condition. Since the polarization reconfigurable antenna can switch between multiple orthogonal polarization modes, it reduces the cost of the system antenna and further improves the communication capacity of the channel, so it has great potential in the fields of polarization tracking and adaptive detect...

AI Technical Summary

Problems solved by technology

[0006] Although the proposed polarization reconfigurable antenna has good radiation performance, it can only radiate in the vertical direction and cannot freely change the direction of the radiation beam

[0007] To sum up, there are few antenna polarization switching methods currently designed using the holographic method, and the direction of the radiation beam is not easy to be flexibly adjusted, which cannot meet the application in complex scenarios

Therefore, how to design a holographic antenna with multi-polarization and flexible and adjustable radiation direction is still a challenge.

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