Patent SG-11201908875Y-A (SG)
Title: Methods and apparatus for locating rfid tags
Inventor: HEWETT SPENCER
IPC: G01S5/02
Filed: 2018-03-28
Abstract: Tel t (ZUQ ,,, X. T. 4. \., 1 • WV.) ga.ga, 4Z *1 4 . 4 I W O 20 18/ 18357 1 Al (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 04 October 2018 (04.10.2018) W I PO I PCT oimitia °nolo °Hum ioo Immo oimIE (10) International Publication Number WO 2018/183571 Al (51) International Patent Classification: G01S 5/02 (2010.01) (21) International Application Number: PCT/US2018/024950 (22) International Filing Date: 28 March 2018 (28.03.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/477,796 28 March 2017 (28.03.2017) US 62/577,530 26 October 2017 (26.10.2017) US (71) Applicant: AUTOMATON, INC. [US/US]; 257 Church Street, Apt. 2, New York, NY 10013 (US). (72) Inventors: HEWETT, Spencer; 257 Church Street, Apt. 2, New York, NY 10013 (US). BLAIR, Adam; 808 Columbus Ave., Apt 23H, New York, NY 10025 (US). SEIFF, Ken; 53 Highridge Road, Hartsdale, NY 10530 (US). MURPHY, Michael; 231 13th Street, Apt 1, Brooklyn, NY 11215 (US). WIEMAN, Mark; 6920 Roosevelt Way NE, #147, Seattle, WA 98115 (US). ADLIN, Tamara; 5216 Green Lake Way North, Seattle, WA 98103 (US). (74) Agent: COLICE, Christopher, Max et al.; Cooley LLP, 1299 Pennsylvania Avenue, NW Suite 700, Washington, DC 20004-2400 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). (54) Title: METHODS AND APPARATUS FOR LOCATING RFID TAGS (57) : A radio frequency identification (RFID) system in- cludes an array of antennas to distinguish line-of-sight (LOS) paths from non-line-of-sight (NLOS) paths. The distance between adjacent antennas in the array of antennas is less than half the wavelength of the radio frequency (RF) signal of the system. Each antenna in the anten- na array is also digitally controlled to change relative phase difference among the antennas, thereby allowing digital steering of the array of antennas across angles of arrival (AOAs) between 0 and 7E. The digital / f steering generates a plot of signal amplitudes as a function of AOAs. LOS paths are distinguished from NLOS paths based on the shapes (e.g., depth, gradient, etc.) of local extremes (e.g., maxima or minima) in the plot. FIG. 3B [Continued on next page] WO 2018/183571 Al MIDEDIMOM0101011EUMMOMOINIIONOOMOIIIMEMOIS Declarations under Rule 4.17: — as to applicant's entitlement to apply for and be granted a patent (Rule 4.17(H)) Published: with international search report (Art. 21(3)) before the expiration of the time limit for amending the claims and to be republished in the event of receipt of amendments (Rule 48.2(h))