Self-Interference Suppression for SatCom Active Antenna Arrays Through Joint Transmit and Receive Beamforming
2024 18th European Conference on Antennas and Propagation (EuCAP)(2024)
摘要
A novel joint transmit and receive beamformer algorithm to suppress self-interference (SI) in shared aperture full duplex active antennas for LEO user terminals is presented. The algorithm ensures regulatory radiation mask compliance while also maximizing realized gain for a given SI level. Simulation results for a 1024-element Vivaldi array at Ku-band illustrate the tradeoff between achievable SI suppression and gain. In the absence of frequency diplexers or isolators, a total isolation in excess of 100 dB over scan angles of 5° - 60° is achieved, with an isolation of 5 dB at broadside, while the per-channel coupled power levels at the input of the LNAs are suppressed by 5 dB through transmit beamforming over the entire scan range.
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关键词
phased array,active antennas,beamforming,self-interference suppression,SatCom
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