As may be appreciated from the illustrative embodiments of a target device described above, in some embodiments, a target device may have a single dual band antenna configured to transmit and receive RF signals at frequencies in different bands. Another illustrative example of a target device having a dual band antenna is shown in FIG. 10, which is a block diagram of target device 1000 comprising a substrate 1001 having a single dual band antenna 1004 and circuitry 1002 disposed thereon. Circuitry 1002 includes frequency multiplier 1006 coupled to dual band antenna 1004, bias control circuitry 1008 coupled to frequency multiplier 1006, and auxiliary receiver 1010 coupled to bias control circuitry 1008. The frequency multiplier 1006 may be of any suitable type including of any type described herein. Auxiliary receiver 1010 may be of any suitable type and, for example, may be a ZigBee compatible module such that the auxiliary receiver 1010 is configured to communicate according to one or more IEEE 802.15.4-based communication protocols.
