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A compact broadband circularly polarized crossed dipole antenna for GNSS applications
A compact broadband circularly polarized crossed dipole antenna for GNSS applications
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机译：紧凑的宽带圆极化交叉偶极子天线，用于GNSS应用
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摘要
A compact broadband circularly polarised crossed dipole antenna arrangement 100, 101, for GNSS and GPS systems, comprising a pair of cross-dipoles 200 & 201, 202 & 203, on each side of a dielectric substrate layer, a vacant-quarter printed ring 400, 401, (VQPR) feeding structure on each side of the substrate layer, and near-field coupled parasitic (NFCP) elements 300, 301, 302, 303, on each side of the substrate layer. The antenna feed structure generates circularly polarized radiation at the desired frequency bands. The arms of the crossed-dipole are an elliptical loop shape. The use of an elliptical loop as a radiator reduces the dimensions of the antenna as a whole, and allows a broad CP and impedance bandwidth. The parasitic elements are preferably arc shaped, and are sited in the corners of the substrate. The NFCP parasitic elements are not electrically connected to the antenna, but are printed on both sides of the substrate and coupled to the antenna radiators.
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