Clark School Home UMD

ISR News Story

Rapid Specific Absorption Rate (SAR) Assessment System (ISR-IP)

ISR intellectual property available to license

Inventors: Christopher Davis, Quirino Balzano, Vildana Hodzic, Robert Gammon

Description:
Current SAR certification requires a time consuming robotic scan of an electric field probe inside a phantom model of the human head or body. This process is slow; the probe perturbs the fields being measured, and is expensive of time and manpower.

Researchers at the department of Electrical and Computer Engineering at the University of Maryland have developed a new technology that pertains to the optical measurement of the specific absorption rate (SAR) in flat, curved or anthropomorphic phantoms. The SAR that results in a phantom from a wireless device is currently a key parameter that must be measured to allow wireless devices to be certified for marketing by the FCC and to satisfy safety guidelines specified in international standards set by the energy deposition in the phantom produced by a wireless device.

This invention allows virtually instantaneous visualization of the spatial SAR distribution in the phantom without the need for any robotic scanning of electric field or temperature probes. The optical rapid SAR system avoids the time consuming robotic scanning currently used, does not perturb the SAR distribution being measured, and is very fast. The optical technique can be used with flat and anthropomorphic phantoms. It also provides a direct measurement of the SAR that is thermal based, rather than based on indirect measurement with electric field probes that must be calibrated, can drift, and perturb the SAR distribution. It also allows measurement right up to the inner surface of the phantom

In current testing, a wireless device is placed near to an anthropomorphic phantom loaded with a dielectric stimulant. The spatial SAR is determined by scanning an electric field probe in 3-D inside the stimulant fluid. The 1-g and 10-g peak SARs are assessed by averaging over volumes around the point of maximum SAR.

For more information
If you would like to license this intellectual property, have questions, would like to contact the inventors, or need more information, contact ISR External Relations Director Jeff Coriale at coriale@umd.edu or 301.405.6604.

Find more ISR IP
You can go to our main IP search page to search by research category or faculty name. Or view the entire list of available IP on our complete IP listing page.

ISR-IP-Davis ISR-IP-wireless-networks ISR-IP-sensors

Related Articles:
FICA: Low Profile F-Inverted Compact Antenna (ISR IP)
Method and Apparatus for Bandwidth-Constrained Queries in Sensor Networks (ISR IP)
Periodic Structures on Metal Films for Plasmon Assisted Selective Fluorescence Excitation (ISR IP)
Optical Wireless Networks with Adjustable Topologies for Indoor and Outdoor Communications (ISR IP)
Optical Signal Processing Based on Light Controlled Photon Tunneling (ISR IP)
Polarization and Wavelength Diversity for Fade Resistance in Optical Wireless Communication Systems (ISR IP)
Congestion Control in Satellite Networks (ISR IP)
Method for Efficient Source Authentication for Multicast Communications in Hybrid Satellite/Wireless Networks (ISR IP)
Method for Performance-Aware Security of Unicast Communications in Hybrid Satellite Networks (ISR IP)
A Microcantilever Sensor with Integrated Optical Readout for Liquid Samples (ISR IP)

June 22, 2007


Prev   Next

 

 

Current Headlines

Clark School Participates in Solar Eclipse

Researchers part of two NSF Neural & Cognitive Systems grants worth more than $1.2 million

ISR researchers win additional $948K NSF Neural and Cognitive Systems grant

Schonfeld, Ryzhov team up for NSF EAGER grant

Yu Named ASME Fellow

Khaligh-led student team wins award at IEEE IFEC competition

Former postdoc Eirini Tsiropoulou named to IEEE ComSoc "rising stars" list

TEDCO Invests $1M into Innovative Companies Including Rajeev Barua’s Startup SecondWrite LLC

Banis wins poster design award at Global Grand Challenges Summit

ISR faculty leading bio-inspired robotics and transportation electrification REUs

News Resources

Return to Newsroom

Search News

Archived News

Events Resources

Events Calendar