Miniaturized dual-band circularly polarized antenna for loading electromagnetic meta-material

Abstract

The invention discloses a miniaturized dual-band circularly polarized antenna for loading electromagnetic meta-material. A radiation layer at a first radiation layer, an electromagnetic meta-material layer at a second layer, and a floor layer at a third layer commonly form a radiant panel of an antenna, wherein the electromagnetic meta-material layer at the second layer changes the relative dielectric constant and the relative permeability of this layer, so that the wavelength of the radiation electromagnetic wave in the meta-material medium is reduced, the antenna size is favorably reduced, the impedance characteristic is changed, and the bandwidth is favorably broadened; furthermore, the adding of a pentahedral metal back cavity can effectively shield the backward radiation and the external disturbance, and the directed radiation directivity requirement of the antenna is enhanced; the entire antenna is free from adding any matching network, the size of the antenna is only 60mm, and the relative bandwidth is 11.7%; the miniaturized dual-band circularly polarized antenna disclosed by the invention has the features of being double in bands, high in gain, miniaturized, good in directed radiation, and simple in feeding mode, and capable of satisfying the detection requirement of a missile-borne antenna; and meanwhile, the portable design requirement can be satisfied, the miniaturized dual-band circularly polarized antenna can be applied to other fields but not limited on the missile aircraft.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a miniaturized dual-band circularly polarized antenna loaded with electromagnetic metamaterials. Background technique [0002] With the advancement of electronic technology and the rapid development of electronic communication, communication electronic equipment is also developing in the direction of diversification and comprehensive functions. Antenna, as one of the most basic components in communication electronic equipment, needs to meet a variety of strict index requirements at the same time, such as multi-band, miniaturization, high gain, etc. However, the traditional antenna design methods have been unable to meet the needs of modern communication development. [0003] With the maturity of electromagnetic metamaterial technology in recent years, the combination of metamaterials and antennas has attracted more and more attention. In practical engineering applications, rat...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing antenna cannot simultaneously take into account the problem of miniaturization, multi-frequency and high gain. A miniaturized dual-band circularly polarized antenna loaded with electromagnetic metamaterials is provided to reduce the size of the antenna. Meet the detection requirements of the system for the target

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