Featured Research

from universities, journals, and other organizations

Innovative Antennae May Signal A 'New Wave' In Health Care Provision

Date:
May 18, 2008
Source:
Engineering and Physical Sciences Research Council
Summary:
Compact, wireless and power efficient body sensors that allow doctors to monitor illnesses and injuries remotely are a step closer thanks to new research.

Body of evidence: wearable antennas, like the ones being tested here, could change the face of patient care.
Credit: Image courtesy of Engineering and Physical Sciences Research Council

Compact, wireless and power efficient body sensors that allow doctors to monitor illnesses and injuries remotely are a step closer thanks to new research.

Related Articles


The use of biosensors attached to the body for health monitoring is not new. However, antennas that enable such devices to be linked together efficiently on a patient's body without wires are currently too uncomfortable to wear for a long time because they need to be large in order to maximise the strength of the signal being received. They can be reduced in size but this leads to the antenna being less efficient, meaning that the battery powering the device has to be recharged more frequently.

Experts in antennas and bioelectromagnetics at Queen's University Belfast (QUB), with funding from the Engineering and Physical Sciences Research Council (EPSRC), have developed new types of antenna that get round these limitations.

Their work could revolutionise the way patient care is provided, making unnecessary visits for tests and check-ups a thing of the past. Instead, biosensors could gather data on heart rate, respiration, posture, gait etc, transmitting this information by radio signal to a control unit also on the patient's body. The data could then be accessed by doctors via the internet or mobile phone, for example.

The new types of antenna are the first in the world to deliberately harness the so-called 'creeping wave' effect. With a conventional on-body antenna the majority of the signal is transmitted either away from the patient or inwards, where it is absorbed by the patient's body which weakens the signal. The rest of the signal, though, hugs the skin's surface and 'creeps' round the body where it is picked up by the control unit.

However, only a small amount of the signal behaves in this 'creeping' way and so its overall strength has to be increased to allow enough of it to reach the control unit. Although traditional antenna designs can be used, they are physically large and typically protrude up to 4cm from the body surface for the frequency bands used by systems such as WiFi. Reducing the size leads to poor system efficiency.

The new antennas developed at QUB solve these problems. They are specifically designed to accentuate the creeping wave effect by maximising the amount of signal radiated out to the antenna's side, rather than inwards and outwards. They are up to 50 times more efficient than previously available designs of the same dimensions. Due to the lower power requirement resulting from this step change in on-body performance and efficiency, the QUB team has succeeded in reducing antenna thickness from 34mm to less than 5mm thick for their new patch antenna, for example.

The antennas can therefore be fitted almost anywhere on the patient without causing significant inconvenience and are sufficiently low-profile to be incorporated into clothing or worn as part of a wound dressing. One QUB design is now the subject of a patent application, with more anticipated.

The unique design of the new antennas could unlock the full potential of emerging 'wireless body area network' (WBAN) technology. A WBAN is a network of biosensors attached to different parts of a patient's body. Patients wearing a WBAN could carry on with their normal lives -- the doctor remotely monitoring the data gathered by the network would simply contact them to arrange appointments when needed.

"The UK leads the world in the development of wearable communications including WBAN antennas," says Dr William Scanlon, who is leading the QUB project. "With EPSRC funding, our group at QUB, along with other related projects at the University of Birmingham, Queen Mary College and elsewhere, could help unleash the full potential of WBAN technology. We could change the way that a range of illnesses, injuries and conditions are monitored, perhaps within five years".

The 3-year project "High-efficiency, Low-profile Antennas with Adjustable Propagating Modes for Wireless Area Body Networks" commenced in July 2006 and will receive total EPSRC funding of just over 340,000.

Project partners include the Home Office Science Development Branch, the Police Scientific Development Branch, chipset manufacturer Zarlink Semiconductor, antenna manufacturer European Antennas, and materials manufacturer Taconic.

WBANs also have many potential applications in other fields, such as the monitoring of firefighters' heartbeat, respiration and movement as they tackle a blaze.

A key role in the research is being played by a specially designed reverberation chamber at QUB where the performance of wearable antennas can be studied under 'live' conditions and with unprecedented accuracy. The construction of this unique facility has been funded entirely as part of the current EPSRC-funded project.

The strength of signal transmitted by the new antennas (measured in microwatts) does not have any health or safety implications for humans.

Using wires to connect the different parts of the WBAN system is not a viable alternative to the use of antennas as it would make the WBANs too uncomfortable to wear and is less reliable due to the risk of cabling faults through repeated movement.


Story Source:

The above story is based on materials provided by Engineering and Physical Sciences Research Council. Note: Materials may be edited for content and length.


Cite This Page:

Engineering and Physical Sciences Research Council. "Innovative Antennae May Signal A 'New Wave' In Health Care Provision." ScienceDaily. ScienceDaily, 18 May 2008. <www.sciencedaily.com/releases/2008/05/080514093253.htm>.
Engineering and Physical Sciences Research Council. (2008, May 18). Innovative Antennae May Signal A 'New Wave' In Health Care Provision. ScienceDaily. Retrieved October 31, 2014 from www.sciencedaily.com/releases/2008/05/080514093253.htm
Engineering and Physical Sciences Research Council. "Innovative Antennae May Signal A 'New Wave' In Health Care Provision." ScienceDaily. www.sciencedaily.com/releases/2008/05/080514093253.htm (accessed October 31, 2014).

Share This



More Matter & Energy News

Friday, October 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Jaguar Land Rover Opens $800 Million Factory in Britain

Jaguar Land Rover Opens $800 Million Factory in Britain

AFP (Oct. 30, 2014) British luxury car manufacturer Jaguar Land Rover opened a $800 million engine manufacturing centre in western England, creating 1,400 jobs. Duration: 00:45 Video provided by AFP
Powered by NewsLook.com
SkyCruiser Concept Claims to Solve Problem With Flying Cars

SkyCruiser Concept Claims to Solve Problem With Flying Cars

Buzz60 (Oct. 30, 2014) A start-up company called Krossblade says its SkyCruiser concept flying car solves the problem with most flying car concepts. Mara Montalbano (@maramontalbano) explains. Video provided by Buzz60
Powered by NewsLook.com
Mind-Controlled Prosthetic Arm Restores Amputee Dexterity

Mind-Controlled Prosthetic Arm Restores Amputee Dexterity

Reuters - Innovations Video Online (Oct. 29, 2014) A Swedish amputee who became the first person to ever receive a brain controlled prosthetic arm is able to manipulate and handle delicate objects with an unprecedented level of dexterity. The device is connected directly to his bone, nerves and muscles, giving him the ability to control it with his thoughts. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Robots Get Funky on the Dance Floor

Robots Get Funky on the Dance Floor

AP (Oct. 29, 2014) Dancing, spinning and fighting robots are showing off their agility at "Robocomp" in Krakow. (Oct. 29) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins