Method for RFID Communication Using Inductive Orthogonal Coupling For Wireless Medical Implanted Sensors and Other Short-Range Communication Applications
First Claim
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1. A passive transmitter tag device suitable for implantation into a subject, said device comprising:
- (a) a non-linear impedance element or time-varying element for introducing harmonics or frequency-shifted signal components into a back-emf produced by a sinusoidal carrier signal;
(b) an energy harnessing element;
(c) sensor/transducer for monitoring a patient condition, wherein said sensor is operably connected to said non-linear impedance element or time-varying element.
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Abstract
The description provides a signal detection system employing a wireless, passive detection device that utilizes waveform shifting for reporting signals to a reader device. The system is useful for a variety of applications including as an implanted medical device for monitoring patient conditions.
33 Citations
21 Claims
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1. A passive transmitter tag device suitable for implantation into a subject, said device comprising:
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(a) a non-linear impedance element or time-varying element for introducing harmonics or frequency-shifted signal components into a back-emf produced by a sinusoidal carrier signal; (b) an energy harnessing element; (c) sensor/transducer for monitoring a patient condition, wherein said sensor is operably connected to said non-linear impedance element or time-varying element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 21)
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11. A reader device comprising:
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(a) a signal source; (b) a wave signal generator; (c) a wave signal detector; and (d) a signal processing unit. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification