Patent ID: 9577349
Date: 2017-02-21
CPC Classifications: H04B

Claim:
1. A transceiver antenna comprising: a transmit antenna coil substantially defining a closed transmit geometry with an innermost transmit coil turn and an outermost transmit coil turn; at least one inner receive antenna coil with an inner receive coil axis and having a plurality of inner coil turns each substantially defining a substantially closed inner coil geometry with an effective inner coil area, the inner receive antenna coil disposed within the innermost transmit coil turn; and at least one outer receive antenna coil with an outer receive coil axis distinct from the inner receive coil axis of the at least one inner receive antenna coil, connected in series with the at least one inner receive antenna coil, and located outside of the outermost transmit coil turn, wherein each of the at least one outer receive antenna coil has a plurality of outer receive coil turns defining a substantially closed outer receive coil geometry with an effective outer receive coil area and is disposed outside of the outermost transmit coil turn of the transmit antenna coil; wherein conducting a current through the transmit antenna coil induces an inner receive coil voltage in the at least one inner receive antenna coil and induces an outer receive coil voltage in the at least one outer receive antenna coil; and wherein the inner receive coil voltage and the outer receive coil voltage at least partially cancel each other due to phase cancellation.