In some embodiments, bias control circuitry 1008 may be configured to apply a forward bias to frequency multiplier 1006 to increase the gain of the dual band antenna 1004 so as to increase the amplitude of the RF signals transmitted by the dual band antenna 1004. For example, in some embodiments, the bias control circuitry 1008 may be configured to apply a forward bias to the frequency multiplier 1006 so as to optimize the impedance match between the dual band antenna 1004 and the frequency multiplier 1006.