The invention discloses a
broadband low-section omni-directional
circularly polarized antenna. A
dielectric substrate of the
broadband low-section omni-directional
circularly polarized antenna comprises an upper-layer
dielectric substrate and a lower-layer
dielectric substrate, the upper-layer
dielectric substrate and the lower-layer
dielectric substrate are parallel to each other, and the upper-layer
dielectric substrate is positioned right above the lower-layer dielectric substrate; a
metal floor is adhere on the lower-layer dielectric substrate; a zero-order
resonator, a parasitic radiator and a
radiation type feeding network are adhered on the upper-layer dielectric substrate; the
radiation type feeding network is positioned in the center of the upper-layer dielectric substrate; zero-order resonant patches of the zero-order
resonator are annularly on the outer side of the
radiation type feeding network, one end of each zero-order resonant
dowel of the zero-order
resonator is connected with the corresponding zero-order resonant patch, and the other end of each zero-order resonant
dowel is connected with the
metal floor; parasitic radiation patches are annularly arranged on the outer sides of the zero-order resonant patches, one end of each parasitic radiation
dowel of the corresponding parasitic radiation patch is connected with the corresponding parasitic radiation patch, and the other end of each parasitic radiation dowel is suspended. The
broadband low-section omni-directional
circularly polarized antenna has the advantages that impedance of the broadband low-section omni-directional circularly polarized antenna and the bandwidths of directional diagrams can be increased, and excellent
axial ratio characteristics can be kept.