WiFi Range Extender
WiFi Range Extender
The WiPhAIA (pronounced WiFire) product range uses patent pending technology to
produce an integrated, low cost solution to WiFi range extension. The products use low
loss optical fibre to deliver WiFi signals to remote locations, they are aimed at applications
where standard twisted pair cannot reach a given location either for logistical,
environmental or safety reasons. Some example scenarios :
Flexible provisioning of WiFi within a building beyond normal 100m twisted pair
length limit
Delivering WiFi into tunnels or underground environments
Delivering WiFi into into and between Faraday Cage/Tempest environments
Delivering WiFi securely between buildings avoiding earth loop issues of copper
The system is made up of two parts, the Sampler Box and the PhAIA (prounounced Fire)
module. Figure 1 shows a pre-production prototype of the sampler box. This unit takes a
coaxial feed from any WiFi signal source which has a detachable antenna and converts
the WiFi signals into bidirectional optical signals that are transmitted and received down
standard multimode or single mode optical fibres. At the remote site, up to 1.5km away,
the PhAIA module, shown in figure 2, takes the optical signals and converts them directly
back into WiFi signals – the antennas are an integral part of the system as can been seen
when the box lid is removed.
Figure 1 : Prototype Sampler Box for use in the WiPhAIA range extender system
Figure 2 : Prototype PhAIA Module for use at the remote end of a WiFI range extension
The prototypes run off standard AC mains power and the typical WiFi range coverage is
upto 8m at the remote site. This can be further extended with the use of low cost amplifiers
in the remote unit.
Technology Status
Trials of range extension have now been run using live University based hotspots and
dark fibre and excellent results have been achieved. Beginning in 2008, the University is
seeking to transfer and license the technology to one or more product development
Referenced Publications
[1] M.J.Cryan et al, “A 2.4GHz Wireless-Over-Fibre Transceiver using Photonic Active Integrated Antennas
(PhAIAs)”, Microwave and Optical Technology Letters, February 2006.
[2] “A low cost Wireless optical transceiver module”, GB 0409855.4 May 2004, US Patent 20080031628
[3] V.Sittakul, M.J. Cryan, “A Fully Bi-directional 2.4-GHz Wireless-over-fibre system using Photonic Active
Integrated Antennas (PhAIAs)”, IEEE Journal of Lightwave Technology , Nov 2007
Contact details
Technology contact:
Dr Martin Cryan
Photonics Research Group
Centre for Communication Research
Department of Electronic and Electrical Engineering
University of Bristol
Merchant Venturers Building
Bristol, BS8 1UB
Tel: (+44)-(0) 117 954 5176
Business contact:
Dr Ray Crispin
Research & Enterprise Development
University of Bristol
Senate House
Tyndall Avenue
Bristol, BS8 1TH
Tel: (+44)-(0) 117 954 6992
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF