Proximity Detection Using Calculated Voltage Standing Wave Ratio Readings

摘要

The present disclosure describes methods, devices, systems, and procedures for detecting a proximity of an object (301) in a near-field region of an electromagnetic field of a transmitting antenna array (204; 304; 404) using a voltage standing wave ratio (VSWR). In aspects, a forward signal for transmission by the antenna elements (308) is generated, at least one VSWR detector (210; 310) coupled to the antenna array (204; 304; 404) measures a power of the forward signal, the forward signal is transmitted, the at least one VSWR detector (210; 310) measures a power of a reflected signal, and the VSWR detector (210; 310) calculates a VSWR. Detected changes in the calculated VSWR are then utilized to detect object (301) proximity in the near-field region. Beamforming weights may be applied to the forward signal and a machine-learned model can be utilized to detect object (301) proximity in the near-field region.