Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Ian Robert Johnson0
James Thomas Edward McDonnell0
John Deryk Waters0
Simon Haydn Baynham0
Date of Patent
May 20, 2008
Patent Application Number
10426031
Date Filed
April 30, 2003
Patent Primary Examiner
Patent abstract
Access to a wireless data network to nodes located in a defined operational area is limited by transmitting a network signal within the defined operational area while transmitting a wave that can cause destructive interference with the network signal into a prohibited area adjacent to the defined operational area. The wave that can cause destructive interference is produced by phase and/or amplitude modulating the network signal. The modulation of the network signal includes sweeping the phase and/or amplitude.
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