A base station antenna element with simple structure but excellent performance

Publication Type:
Conference Proceeding
Citation:
2018 Australian Microwave Symposium, AMS 2018 - Conference Proceedings, 2018, 2018-January pp. 35 - 36
Issue Date:
2018-04-24
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© 2018 IEEE. A ±45° dual-polarized concentrically arranged dipole antenna is proposed for base station applications. The simple, robust antenna consists of four simple dipoles arranged in a square above a flat reflector. Two specially designed feeding networks for the two polarizations are proposed to simultaneously excite the four dipoles. Without shaping the reflector, the combination of four dipoles provides a stable radiation pattern across a wide bandwidth. Measured results show that the proposed antenna has an input reflection coefficient ≤ -14 dB from 1.71 to 2.71 GHz for both polarizations. Across this wide bandwidth (45.2%), the half-power-beamwidths (HPBWs) of the two polarizations remain very stable in the range from 60.5° to 69.5°. High port-to-port isolation ≥ 30 dB and low cross-polarization level ≤ -20 dB are achieved over the entire operating band.
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