Broadband Dual-frequency High Isolation Base Station Antenna with Low RCS Structure Loaded
DOI:
https://doi.org/10.13052/2024.ACES.J.390313Keywords:
Base station antenna, decoupling, dual band, pattern restorationAbstract
A novel dual-band dual-polarization shared aperture antenna is proposed, which covers frequencies 1.7–2.6 GHz and 3.3–3.8 GHz. The structure, with low radar cross section (RCS), is designed to reduce the radiation interference on the high band (HB) antenna. Additionally, by introducing U-shaped slots on the arms of the low band (LB) antenna, polarization isolation between the HB elements is significantly enhanced, which can reach up to 25 dB across the whole band. Moreover, to restore the radiation pattern of the LB antenna, the dielectric substrate is employed beneath the HB antenna as a substitute for the ground plane. The antenna proposed in this paper possesses attributes of broadband, compact size, and simplified structure.
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