Abstract
A broadband dual-polarized notched-band antenna is proposed for the application of 2/3/4/5G base stations. The radiator of the antenna is composed of a pair of crossed printed dipoles and is fed by both broadband baluns. Based on the broadband dual-polarized antenna with a tooth-shaped slot line in the baluns, a crossed dumbbell-shaped parasitic element is proposed above the radiator to generate a notch band from 2.9 to 3.1 GHz and improve the impedance matching in the operating band (1.71–2.69 GHz and 3.4–3.6 GHz). To verify the principle, the antenna was fabricated and measured. The experimental results confirm that it achieves a bandwidth covering 1.71–3.6 GHz (VSWR 35 dB in the operating band. The antenna has a half-power beamwidth within 69.5 ± 4° and gain within 8.1 ± 0.4 dBi in the 2/3/4G bands, and a gain within 6.6 ± 0.5 dBi in the 5G band.
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