Enhancing Radio Coverage Inside Buildings
D.C. Kemp*, C. Martel, M. Philippakis, M.W. Shelley, R.A. Pearson, I Llewellyn (1)
ERA Technology Ltd, Surrey, UK (1) Ofcom, London, UK.
In radio networks, cell sizes are determined by the power needed to provide an acceptable signal to noise ratio to a certain percentage of a given coverage zone. Propagation within buildings introduces losses to the system caused by blockage and absorption. If the losses can be minimised, it is possible to use lower power levels while still covering the same region. This can potentially reduce the possibility of interference, which means that less radio power and/or base station sites are required. Therefore, a reduction of radio frequency (RF) losses caused by buildings can potentially increase the overall spectrum efficiency of the network. Theoretical and experimental work has been performed to show that propagation within buildings can be greatly improved by using techniques based on frequency selective surfaces (FSS). A novel structure is proposed that has the potential to enhance the propagation in corridors and stairwells. The structure is highly efficient and converts and re-radiates the specular energy in a predefined direction away from the specular direction [1].
IEEE Antennas and Propagation Society International Symposium
2005
June
1A
783-786
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