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A novel center-fed Global Navigation Satellite System (GNSS) antenna is proposed in this paper. The antenna is composed of two layers of microstrip patches, a folded ground plane and three choke rings. Simulated and measured results show that two frequency bands for return loss >10 dB cover GPS L2 (1.193∼1.247 GHz) and GPS L1 (1.545∼1.625 GHz) with good axial ratio (AR) performance. The radiation...
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