1. Active RFID UHF Beacon Tag (Model 137001), GAO Tek Inc., Toronto, Ontario,
http://www.gaotek.com/index.php?main_page=product_info&cPath=63_136&products_id=1457
2. Karthaus, U., Fischer, M.: Fully integrated passive uhf rfid transponder ic with 16.7-uw minimum rf input power. IEEE J. Solid-State Circuits 38(10), 1602–1608 (2003)
3. Pillai, V., Heinrich, H., Dieska, D., Nikitin, P., Martinez, R., Rao, K.: 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. IEEE Trans. Circuits Syst. I 54(7), 1500–1512 (2007)
4. Seemann, K., Hofer, G., Cilek, F., Weigel, R.: Single-ended ultra-low-power multistage rectifiers for passive rfid tags at uhf and microwave frequencies. In: Proc. IEEE Radio and Wireless Symposium, January 17–19, pp. 479–482 (2006)
5. Krumm, J., Eckert, E., Glauert, W.H., Ullmann, A., Fix, W., Clemens, W.: A polymer transistor circuit using PDHTT. IEEE Electron Device Letters 25(6), 399–401 (2004)