Abstract
A broadband ± 45° dual-polarized dipole antenna with stable radiation pattern is proposed. The antenna consists of four dipoles, a shaped reflector and a broadband feeding network. To realize ± 45° dual-polarize radiation pattern, the dipoles are formed as a square loop and fed by the feeding network. The feeding network is formed by four baluns and two 1-to-2 power dividers. The baluns and the power dividers are used to feed the dipoles for achieving better performance in impedance matching and bandwidth. The square reflector is employed to stabilize the radiation. With this method, the antenna obtains the impedance bandwidth for 58.5% (|S11|>15 dB within 2.3–4.2 GHz), and the 3-dB beamwidth of the proposed antenna is within 65° ± 5° in the horizontal plane.
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