UNTETHERED STYLUS EMPLOYING SEPARATE COMMUNICATION CHANNELS

摘要

An untethered stylus is configured to cooperate with a location sensor. The location sensor is configured to generate a magnetic field comprising a number of frequencies and communicatively couple to the stylus. The stylus is configured to include a housing having a tip and a shield. An antenna arrangement, provided at the housing, includes a number of coil resonant circuits each tuned to a different frequency of the magnetic field. Each of the coil resonant circuits is configured to be energized in response to the magnetic field. The coil resonant circuits of the antenna arrangement may each include an inductive coil disposed about a ferrite rod in a spaced relationship. A connection couples the coil resonant circuits between the tip and shield of the housing to define separate channels for communicatively coupling the stylus tip and the location sensor.