Wideband Inter-beam Interference Cancellation for mmW/Sub-THz Phased Arrays With Squint

As relative bandwidth increases, beam squint, i.e., frequency dependent directivity, limits the wideband performance of phase-shifter steered arrays. This effect is already notable in 5G systems operating at 28 GHz and above with 400/800 MHz bandwidths, especially if broadband cancellation needed between multiple beams. The squinting reduces signal-to-interference-plus-noise-ratio a multibeam system by changing level direction spatial null towards interferer. paper examines effectiveness inter-beam interference (IBI) using crosscoupled signals for arrays visible squint effect. For large array, this presents component carrier-based approach beams different users or data streams. Furthermore, as array size increase, impact which also examined IBI. an example scenario simulated standard 5GNR modulated waveforms.