Method and apparatus for coupling multiple microradios to an RFID tag antenna

摘要

Whether or not one utilizes direct DC coupling of the microradios to the antenna feed points or couples the RF energy from the dipoles associated with the spaced-apart contact pads on the microradio, in the subject invention one selects only those microradios that are within a certain variance of a preferred direction and then makes sure that the polarization direction of all of these radios is in the preferred direction are identical, in one embodiment by utilizing digital coding, which both activates the microradio and is used to sense the polarity associated with the connection from the signal source to the contact pads.