RFID and Wireless Sensing
Source: University of Minho
Off late, the demand of markets to use active transponders, is reaching a saturation point. The main reason is because these ones get its power from batteries, which must be periodically replaced or recharged. This increases the final costs (maintenance + management), but contrarily to the passive transponders, theirs advantage is to no require remote powering, since an adequate lifetime and tight current margins be previewed in advance. Thus, the use of passive transponders are an interesting option, since it is not required batteries and the lifetime is virtually infinite. However the low-power consumptions constraints are huge and these type of elements must work with small duty-cycles.