Out-of-Band Radiation from Antenna Arrays Clarified
arXiv:1802.02475 · doi:10.1109/LWC.2018.2802519
Abstract
Non-linearities in radio-frequency (RF) transceiver hardware, particularly in power amplifiers, cause distortion in-band and out-of-band. Contrary to claims made in recent literature, in a multiple-antenna system this distortion is correlated across the antennas in the array. A significant implication of this fact is that out-of-band emissions caused by non-linearities are beamformed, in some cases into the same direction as the useful signal.
IEEE Wireless Communications Letters, 2018, to appear
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