Frequency selection surface unit, frequency selection surface and frequency selection method

Abstract

The invention discloses a frequency selection surface unit, a frequency selection surface and a frequency selection method. The frequency selection surface unit comprises a first electromagnetic dipole antenna and a second electromagnetic dipole antenna, the first electromagnetic dipole antenna is arranged above the second electromagnetic dipole antenna, and the first electromagnetic dipole antenna and the second electromagnetic dipole antenna are connected in a back-to-back manner so as to form a tightly coupled antenna which is small in spacing and has dual polarization; the first electromagnetic dipole antenna comprises a first filtering antenna and a first metal column; the first filtering antenna is fixedly connected with the first metal column; the second electromagnetic dipole antenna comprises a second filtering antenna, a second metal column and a floor structure, and the second filtering antenna is fixedly connected with the second metal column; according to the invention, the first electromagnetic dipole antenna and the second electromagnetic dipole antenna are set as broadband antennas with filtering characteristics, and the filtering characteristics of the antennas are realized under the condition that the thickness of the antennas and an additional circuit structure are not increased, so that the frequency selective surface has the characteristics of low thickness, high selectivity and broadband.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a frequency selection surface unit, a frequency selection surface and a frequency selection method. Background technique [0002] For systems that interfere with each other, the frequency selective surface can be used to shield out-of-band signals, and only pass the frequency that the system itself needs to pass. It can be used for decoupling in the antenna system. The frequency selective surface can be used as a covering layer to improve antenna gain, isolation, and selection. performance, and beam steering and other performance. A frequency selective surface is a structure that utilizes the uniform distribution of periodic units. It acts as a spatial filter to select the frequency of space electromagnetic waves. In practical applications, a frequency selective surface with high selectivity is required. [0003] Currently, options for increasing the selectivity of freque...

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is that, aiming at the defects of the prior art, the present invention provides a frequency selective surface unit, a frequency selective surface and a frequency selective method to solve the problem of high thickness, low selectivity and narrow bandwidth of the existing frequency selective surface. technical issues

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