An Ultra-Low-Power Long Range Battery/Passive RFID Tag for UHF and Microwave Bands With a Current Consumption of 700 nA at 1.5 V. - Vijay Pillai; Harley Heinrich; David Dieska; Pavel V. Nikitin; Rene Martinez; K. V. Seshagiri Rao (IEEE Trans. Circuits Syst. I Regul. Pap., 2007)