A Novel Cross-Interspersed Design of Multiband Antennas for Base Station Applications

This paper proposes a dual-band dual-polarized antenna for 5G base station application. The proposed antenna avoids using the conventional interspersed technique, which causes cross-band scattering. It consists of a novel cross-interspersed configuration, and the working frequency covers low-band (LB) 690-990MHz and high-band (HB) 1810–2690 MHz bands. For demonstration, the proposed design is fabricated and measured. The dual-band prototype features stable radiation patterns with HPBW $65\pm 5^\circ$ and wideband matching >10dB in the entire frequency bands of interest. Moreover, the experimental results verified that the port-to-port isolation is better than 36 dB in the operating band.