The experienced maximum read distance, by using the shortrange reader (emitting not more than 0.5 W EIRP), and tags’ microchip with typical P_chip=-30dBm , was 1.5 m for the TAG-1 and 2.1 m for the
TAG-2. However, by using a longrange reader (emitting up to 3.2 W EIRP) the maximum read distance estimated from (8) could reach 4 m for the smaller design and 5.5 m for the larger one.