Patent ID: 9728024
Date: 2017-08-08
CPC Classifications: G07C,G08C,H03F,H04W

Claim:
1. A fob, comprising: a power amplifier including an output having an output impedance; a radio frequency antenna connected to the power amplifier output representing a first load impedance to the power amplifier output in a space free of interference for radio frequency transmissions resulting in a first level of output power, and a second load impedance to the power amplifier output when a hand of a user is capacitively coupled to the antenna, the second load impedance determined at least in part by a combination of the first load impedance and a capacitive coupling of the hand to the antenna; wherein a difference between the second load impedance and the output impedance of the power amplifier is less than a difference between the first load impedance and the output impedance, resulting in a second level of output power, the second level of output power greater than the first level of output power, without adjusting the second load impedance subsequent to the capacitive coupling of the hand to the antenna.