APPARATUS AND METHODS FOR CROSS-POLARIZED TILT ANTENNAS

摘要

Embodiments are provided for cross-polarized antennas design with different down tilt angles that support versatile functionality, such as for MIMO or beamforming. An embodiment antenna circuit comprises a baseband signal processor, a pair of RF transmitters coupled to the baseband signal processor, a pair of PAs coupled to the RF transmitters, a 90°/180° hybrid coupler coupled to the RF transmitters, a pair of duplexers and two antennas coupled to the PAs. The two antennas are down tilted at different down tilt angles. A pair of signals is generated using the baseband signal processor, transmitted by the RF transmitters, and amplified using the PAs. Additionally, a 90° or 180° phase difference is introduced into the signals using the 90°/180° hybrid coupler. After the amplifying and introducing the phase difference, the signals are polarized at two different polarizations and down tilted at different down tilt angles using the two antennas.

主权项

1. A method performed by an antenna apparatus comprising:
phase shifting a pair of amplified radio frequency (RF) signals with a phase difference of 90° or 180° using a 90° or 180° hybrid coupler passive circuit; using single-column cross-polarized antennas coupled to the 90° or 180° hybrid coupler passive circuit for:
polarizing the phase shifted signals at two different polarizations;directing the polarized signals at different down tilt angles; andtransmitting the directed signals as RF beams.