Metasurface-Based Low-Profile Broadband Pattern Diversity Antennas

Abstract

The present invention proposes a low-profile broadband pattern diversity antenna based on metasurface, including a stacked first dielectric board, a second dielectric board and a third dielectric board, wherein: the first dielectric board is printed on its upper surface There is a metasurface radiation unit composed of 4x4 square metal patches arranged periodically; 4 rectangular feed patches are printed on the upper surface of the second dielectric plate to feed the metasurface radiation unit; the first The lower surface of the second dielectric board is printed with a metal floor; the lower surface of the third rectangular dielectric board is printed with a feeding network, and its output port is connected to the rectangular feeding patch through a metallized via hole. The present invention realizes pattern diversity by coupling feed to excite different modes of the chamfered metasurface, reduces the height of the antenna section and widens the bandwidth of the antenna, and has a pattern within the working bandwidth when operating in the side-fire mode. The advantage of no side lobes can be applied to wireless communication systems such as radio frequency front-ends.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a pattern diversity antenna, in particular to a low-profile broadband pattern diversity antenna based on a metasurface. Background technique [0002] With the rapid development of wireless communication and the public's expectation for high speed and high quality of wireless communication, the reliability and stability of communication have become important evaluation indicators that cannot be ignored. Diversity antenna technology can make use of the incoherence characteristics of each channel to compensate for the deep fading of each signal, can effectively overcome the multipath fading effect, and improve the reliability and stability of communication, and has been widely used. Antenna diversity technology can be divided into polarization diversity and pattern diversity. Among them, polarization diversity uses the characteristics that electromagnetic waves of different polarizat...

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Problems solved by technology

[0006] The object of the present invention is to overcome the defective that above-mentioned prior art exists, has proposed a kind of low-profile broadband pattern diversity antenna based on metasurface, aims to solve existing in the prior art that it is difficult to simultaneously obtain wide impedance bandwidth and low-profile characteristics, And when the antenna works in the broadside mode, the sidelobe of the pattern gradually increases with the increase of the frequency, which leads to the technical problem of the gradual deterioration of the pattern

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