Ultra-wideband dual-band cellular basestation antenna

摘要

Ultra-wideband dual-band cellular dual-polarisation base-station antennas and lowband radiators for such antennas axe disclosed. The low-band radiator comprises a dipole (140) and an extended dipole (120) configured in a crossed arrangement, a capacitively coupled feed (130) connecting the extended dipole to an antenna feed, and a pair of auxiliary radiating elements (150). The dipole comprises two dipole arms, each of approximately »/4, for connection to the antenna feed. The extended dipole has anti-resonant dipole arms of approximately »/2. The auxiliary radiating elements are configured in parallel at opposite ends of the extended dipole. The radiator is adapted for the frequency range of 698-960 MHz and provides a horizontal beamwidth of approximately 65 degrees. The dual-band base-station antenna comprises bigh-band radiators configured in at least one array and low-band radiators interspersed amongst the high-band radiators at regular intervals.