Underwater wireless communications hotspot
First Claim
1. A subsea wireless hotspot, comprising a communications zone a communications node and a receiver,said communications node comprising a transmitter and a first closed loop antenna connected to an output from said transmitter,a perimeter of said communications zone being circumscribed by said first closed loop antenna,wherein, during use, an electrical signal is passed from said output of said transmitter to said first closed loop antenna thereby producing an alternating magnetic field within said zone, and producing a corresponding magnetic signal within said zone,whereby said receiver receives said magnetic signal when located inside said communications zone.
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Abstract
The present invention provides an underwater wireless communications hotspot comprising an active zone which is circumscribed by a large closed loop antenna and within which wireless communication by means of electromagnetic signals can take place. The wireless communications hotspot of the present invention is suitable for data transfer between a communications node of the wireless hotspot and a receiver mounted on a mobile unit which is located inside the active zone of the hotspot. The wireless hotspot of the present invention provides a means for high bit rate data transfer from the communications node and the mobile unit, due to improved uniformity of coverage within the active zone of the hotspot and due to a reduction in the attenuation with distance compared to communications at positions outside the perimeter of a loop antenna.
30 Citations
23 Claims
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1. A subsea wireless hotspot, comprising a communications zone a communications node and a receiver,
said communications node comprising a transmitter and a first closed loop antenna connected to an output from said transmitter, a perimeter of said communications zone being circumscribed by said first closed loop antenna, wherein, during use, an electrical signal is passed from said output of said transmitter to said first closed loop antenna thereby producing an alternating magnetic field within said zone, and producing a corresponding magnetic signal within said zone, whereby said receiver receives said magnetic signal when located inside said communications zone.
Specification