PROXIMITY SENSING AND DISTANCE MEASUREMENT USING EHF SIGNALS

摘要

A system for sensing proximity and determining distance using EHF signals may include a first amplifier for amplifying an output signal having an EHF frequency. A transducer may be operatively coupled to the first amplifier for converting the amplified output signal into an electromagnetic signal having the EHF frequency. A proximity-sensing circuit may be responsive to a reference and a composite signal conducted between the first amplifier and the transducer for sensing the proximity of a transducer field-modifying device proximate to the transducer. The composite signal may include the amplified output signal and any electromagnetic received signal received by the transducer and induced by the field-modifying device.