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A broadband circularly polarized antenna with wide axial-ratio beamwidth utilizing a wideband power divider network is presented. The vertical and horizontal paired-dipoles are used as the antenna elements, which are excited by a 1-to-4 sequential broadband feeding network. Through a rational design of the spacing between two parallel dipoles and the feeding network, an antenna with broad impedance...
A center-fed circularly polarized (CP) antenna with zero phase center is proposed in this paper. The proposed antenna can work in the BeiDou satellite navigation system (CNSS) B1-band (1561.098 ± 2.046MHz), and it has been fabricated and tested. The center-fed antenna uses a square microstrip patch with four slots, and an annular slot is embedded into the patch to achieve the CP radiation. The structure...
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