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.