RFID tags with port-dependent functionality

摘要

An Integrated Circuit (IC) for an RFID tag includes at least two antenna ports for coupling to at least two antennas. The IC may be configured to determine the port from which it receives an input signal, and provide a first functionality if it receives the input from a first port and a second functionality if it receives the input from a second port. The IC may be configured to determine and/or offer a functionality based on the receiving port.

主权项

1. A Radio Frequency Identification integrated circuit (IC), comprising:
a first antenna port configured to be coupled to a first antenna; a second antenna port configured to be coupled to a second antenna functionally distinct from the first antenna; and a processing block coupled to the first antenna port and the second antenna port, wherein the processing block is capable to receive a first request from the first antenna port and a second request from the second antenna port concurrently, and wherein the processing block is configured to:
receive the first request from the first antenna port;upon determining that the first request for a tag functionality was received from the first antenna port, deny the first request;receive the second request from the second antenna port, wherein the first antenna port is electrically isolated from the second antenna port such that the antenna ports do not share a same reference potential; andupon determining that the second request for the tag functionality was received from the second antenna port, grant the second request.