Testing the T-shirt antenna

Jun 30, 2011
Testing the T-shirt Antenna
NPL's Dr Tian Hong Loh in the SMART chamber

NPL worked with BAE Systems Advanced Technology Centre, to measure the pattern and efficiency of radiation emitted from next generation wearable antennas embedded in T-shirts.

Wearable antennas could be the future of wireless technology and have important applications in communications, security and healthcare, but as they are worn on the body it is particularly important to understand their performance. The human body absorbs electromagnetic signals and so there are concerns that the emitted signal from the could suffer from power losses if worn too close.

The research tested a number of novel measurement techniques that could help the development of this exciting new technology, including measuring the radiation absorbed by a 'human dummy', designed from material that mimics the characteristics of human tissue.

Dr James Matthews, Principal Engineer, BAE Systems Advanced Technology Centre, said:

"NPL provided an excellent quality set of measurements, despite the difficulties inherent in wearable antenna technology. NPL took time to understand the requirements and took a proactive approach to the challenge, providing wider ranging measurements than originally anticipated."

NPL facilities used during the research included the Reverberation Chamber, Fully Anechoic Small Antenna Radiated Testing (SMART) Range, the EMC Ferrite Lined Fully Anechoic Room (FAR) and specific absorption rate (SAR) facilities.

The collaborative research revealed that there is an optimum distance for the position of the antenna in relation to the body, which can improve the antenna's efficiency. This information, when integrated into antenna design, will help developers produce better products.

Explore further: Greater safety and security at Europe's train stations

Provided by National Physical Laboratory

3 /5 (1 vote)
add to favorites email to friend print save as pdf

Related Stories

NIST antenna calibrations extended to 60-110 GHz

May 25, 2007

The National Institute of Standards and Technology (NIST) has developed a new "tabletop" sized facility to improve characterization of antennas operating in the 60 to 110 gigahertz (GHz) frequency range. This extended frequency ...

Textile antenna promises futuristic communications

Sep 28, 2009

(PhysOrg.com) -- With a simple press on his shirt insignia, the captain of the Star Ship Enterprise could send and receive messages. Now, thanks to the efforts of a Finnish company, this futuristic communication ...

Recommended for you

Greater safety and security at Europe's train stations

Sep 01, 2014

When a suspicious individual fleas on a bus or by train, then things usually get tough for the police. This is because the security systems of the various transportation companies and security services are ...

Fingerprints for freight items

Sep 01, 2014

Security is a top priority in air freight logistics but screening procedures can be very time consuming and costly. Fraunhofer researchers intend to boost efficiency with a new approach to digital logistics, ...

On the way to a safe and secure smart home

Sep 01, 2014

A growing number of household operations can be managed via the Internet. Today's "Smart Home" promises efficient building management. But often the systems are not secure and can only be retrofitted at great ...

DIY glove-based tutor indicates muscle-memory potential

Aug 31, 2014

A senior editor at IEEE Spectrum worked on a DIY project that enabled his 11-year-old son to improve his touch typing by use of a vibrating glove. His son was already "pretty quick on the keyboard," said ...

User comments : 0