... types of antennas have been reported to be used as passive far-field tag antennas, including meander line antennas, [22, 23], folded dipole antennas [24, 25], loop antennas [26, 27], slot antennas ... inverted-F antennas [30], planar inverted-F antennas [31, 32],slotted planar inverted-F antennas [33], patch antennas [34] and so on. Each type of antennahas its inherent characteristics for specific ... is maximized for a long reading distance, but it has to be noted that a high Q factorlimits the bandwidth of transmitted data. Therefore, the typical Q value for most tag coil antennas is about...