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Environmentally-Sensitive Reconfigurable Antenna

技術應用: Wireless, battery-free acoustic sensor.Acoustically actuated antenna system. Remote sensing, large area surveillance,covert monitoring, infrastructure monitoring, traffic monitoring, biochemical detection for homeland security.

詳細技術說明: University researchers have developed an antenna system that changes the nature of its transmission and reception of electromagnetic radiation based on local environmental conditions. It may use this feature to transmit local environmental information by wireless means without the need for power.The sensor system described in this invention requires no power, but may be interrogated remotely by wireless means. The simplicity of the device and passive operation means the device can be deployed over large regions while still enabling remote readout. Furthermore, since the interrogating system may use directional antennas, the interrogating radiation may be highly localized, e.g., through the use of a "pencil beam". Thus the location of the sensors may be determined by the interrogating system, allowing true geographic mapping of the sensor networks.

*Abstract: With the exception of light-based sensors, that change their light interaction properties, all sensors require some power in order to operate and provide a signal to a remote source. Light-based systems are readily blocked by typical obstructions such as buildings, trees, and vegetation.Some wireless systems require the use of on-board circuitry that temporarily charges up a battery or capacitor in the presence of an externally applied RF radiation, then use this electrical energy to re-transmit signal. This method is bulky, expensive, and can only transmit data at short distances. The need for a powered sensor/transmitter severely limits the deployment of such sensors in large scale such as over large geographic regions or as part of the civil infrastructure.

*Principal Investigation: Name: Mark Bachman
Department:

Name: Guann Pyng Li
Department:

附加資料: Patent Number: US7570169B2
Application Number: US2006377907A
Inventor: Li, Guann-Pyng | Bachman, Mark
Priority Date: 15 Mar 2005
Priority Number: US7570169B2
Application Date: 15 Mar 2006
Publication Date: 4 Aug 2009
IPC Current: G08B001314 | H01Q000150 | H01Q000324 | H01Q000900
US Class: 3405727 | 343745 | 343876 | 343906
Assignee Applicant: The Regents of the University of California
Title: Environmentally sensitive reconfigurable antenna
Usefulness: Environmentally sensitive reconfigurable antenna
Summary: For remote detection of chemical, biological, physical, temperature, heat, humidity, shock, vibration movement, sound, pressure, strain, light, liquid, torque, animal activity, etc., in monitoring geographic areas for security purposes. Also suits for vehicle traffic monitoring applications.
Novelty: Environmentally sensitive reconfigurable antenna for monitoring geographic area, has resistive or capacitive connector whose electrical property changes in response to change in environmental conditions

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