Title:
FREQUENCY TRANSLATING BACKSCATTER MODULATOR WITH ENVELOPE CONTROL TO SUPPORT OFDM/QAM AND OTHER ENVELOPE MODULATED WIRELESS PROTOCOLS
Document Type and Number:
WIPO Patent Application WO/2017/222661
Kind Code:
A3
Abstract:
A backscatter modulator for providing low power wireless communications. The disclosed modulator provides phase control for discriminating backscatter from the antenna versus other objects. In addition, the disclosed backscatter modulator provides amplitude modulation so that the technique can provide a non-constant envelope which can provide an intentional imbalance to manipulate super-position to provide envelope control of the reflected signal, while still maintaining the frequency translation properties. The disclosed backscatter modulator thus allows compatibility with QAM, OFDM and other non-constant envelope modulation schemes to be backscattered, while still supporting the frequency translation behavior.
Inventors:
CHANG MAU CHUNG FRANK (US)
TANG ADRIAN J (US)
TANG ADRIAN J (US)
Application Number:
PCT/US2017/031782
Publication Date:
February 22, 2018
Filing Date:
May 09, 2017
Export Citation:
Assignee:
UNIV CALIFORNIA (US)
CALIFORNIA INST OF TECHN (US)
CALIFORNIA INST OF TECHN (US)
International Classes:
H04B1/02; H04B1/04
Foreign References:
| US20150009018A1 | 2015-01-08 | |||
| US8364096B2 | 2013-01-29 | |||
| US20070116015A1 | 2007-05-24 |
Attorney, Agent or Firm:
O'BANION, John (US)
Download PDF:
Previous Patent: ELECTROMAGNETIC CASING INSPECTION TOOL WITH AZIMUTHAL SENSITIVITY
Next Patent: AUGMENTING REALITY VIA ANTENNA AND INTERACTION PROFILE
Next Patent: AUGMENTING REALITY VIA ANTENNA AND INTERACTION PROFILE