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1. (WO2005060702) RF BACKSCATTER TRANSMISSION WITH ZERO DC POWER CONSUMPTION
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2005/060702    International Application No.:    PCT/US2004/043014
Publication Date: 07.07.2005 International Filing Date: 20.12.2004
IPC:
G06F 1/16 (2006.01), H04B 1/44 (2006.01), H04L 5/16 (2006.01)
Applicants: ALTIERRE CORPORATION [US/US]; 18569 Decatur Road, Monte Sereno, CA 95030 (US) (For All Designated States Except US).
McDONALD, Mark, Douglas [US/US]; (US) (For US Only).
SAXENA, Sunit [US/US]; (US) (For US Only).
GOEL, Anurag [IN/US]; (US) (For US Only).
DORFMAN, Leonard, Mark [US/US]; (US) (For US Only)
Inventors: McDONALD, Mark, Douglas; (US).
SAXENA, Sunit; (US).
GOEL, Anurag; (US).
DORFMAN, Leonard, Mark; (US)
Agent: EAKIN, James, E.; Law Offices of James E. Eakin, P.O. Box 1250, Menlo Park, CA 94025 (US)
Priority Data:
60/530,819 18.12.2003 US
60/530,818 18.12.2003 US
60/530,817 18.12.2003 US
60/530,816 18.12.2003 US
60/530,795 18.12.2003 US
60/530,790 18.12.2003 US
60/530,783 18.12.2003 US
60/530,823 18.12.2003 US
60/530,784 18.12.2003 US
60/530,782 18.12.2003 US
Title (EN) RF BACKSCATTER TRANSMISSION WITH ZERO DC POWER CONSUMPTION
(FR) TRANSMISSION EN RADIODIFFUSION R.F. A CONSOMMATION DE COURANT CC NULLE
Abstract: front page image
(EN)A method for minimizing power consumption in a wireless device (42) which utilizes backscatter transmission in half-duplex mode, wherein a switching device is interposed between an antenna (56) and a transmitter (54)-receiver (52), and the switching device is capable of causing the antenna load impedance characteristic to be either a short, a value which substantially matches the antenna impedance, or an open, depending on the portion of the half-duplex mode.
(FR)L'invention concerne un procédé permettant de limiter la consommation de courant dans un dispositif sans fil, qui met en oeuvre une transmission en radiodiffusion en mode semi-duplex mode. Un dispositif de commutation est interposé entre une antenne et un émetteur-récepteur, ledit dispositif permettant de faire varier la caractéristique d'impédance de charge d'antenne entre une impédance courte dont la valeur correspond sensiblement à l'impédance d'antenne et une impédance ouverte en fonction de la partie du mode semi-duplex.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)