| Resumen |
Over the past few years, the use of wireless technologies has seen a large increase over the Wireless Sensor Network (WSN) area. These autonomous and cheap devices are designed for continuous monitoring (CM) or event detection (EDD).
However, the operation and design of these wireless sensor networks is limited by the energy capacity of the battery of each node.
The main use of wireless sensor networks is to provide detailed information about a surveyed area through wireless communication for the particular application for which they were esigned (CM or EDD). From these applications, the continuous monitoring (CM) has higher energy consumption, since all the nodes in the system have to periodically transmit their information to the sink. This encourages the research in alternatives to optimize the consumption in order to prolong the life of the network. One solution is to use solar cells, but they are not efficient when working indoors or in the evening. This paper proposes an alternative for the electric supply for the nodes to harness electromagnetic waves are in the radio spectrum in order to supply power to each node within the network.
To this end, a receiving antenna design capable of capturing a wide range of frequencies is proposed. From the ever-?presentsignals in the radio spectrum, the most interesting are TV signals and radio. This is, because their coverage area is wide and
the transmission power is |
