Method and system for controlling cavity height of a leaky wave antenna for RFID communications
First Claim
1. A method for communication, the method comprising:
- receiving RF signals via a leaky wave antenna within a radio frequency identification (RFID) transponder; and
modulating a frequency of a backscattered signal associated with said received RF signals by controlling spacing between surfaces of said leaky wave antenna.
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Accused Products
Abstract
Methods and systems for controlling cavity height of a leaky wave antenna for RFID communications are disclosed. In this regard, an RFID transponder may receive RF signals via a leaky wave antenna and modulate a frequency of a backscattered signal by controlling a height of a resonant cavity of the leaky wave antenna. The height of the resonant cavity may be controlled via a micro-electromechanical system. The RFID transponder may modulate an amplitude of the backscattered signal by controlling an input impedance of the RFID transponder. The input impedance may be controlled by switching a load in and out of a receive path of the RFID transponder. The input impedance of the RFID transponder may be controlled by switching between a plurality of feed points of the leaky wave antenna. Each of the plurality of feed points may be located in a different position in the resonant cavity of the leaky wave antenna.
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Citations
20 Claims
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1. A method for communication, the method comprising:
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receiving RF signals via a leaky wave antenna within a radio frequency identification (RFID) transponder; and modulating a frequency of a backscattered signal associated with said received RF signals by controlling spacing between surfaces of said leaky wave antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for communication, the system comprising:
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one or more circuits for use in an RFID transponder comprising a leaky wave antenna, said one or more circuits being operable to; receive a RF signal via said leaky wave antenna; and modulate a frequency of a backscattered signal by controlling a height of a resonant cavity of said leaky wave antenna. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification