Low-cost Transmit Antenna with Beam-shaping Properties for Rf Energy Transport
نویسنده
چکیده
Far-field RF energy transport is an alternative for powering wireless sensor nodes. The major issues concerning the technology are path loss and transmitted power restrictions. After optimizing all subsystems of a rectifying antenna (rectenna) the power incident upon the rectenna can be increased without increasing the transmit power. Thereto the transmitted energy must be directed to the rectenna but also to the reflecting surrounding, such that all paths direct and reflected add in-phase at the rectenna. A cost-effective transmit antenna, capable of adaptively creating such a radiation pattern, is offered by a switched-array antenna. The concept is proved experimentally and by modeling and simulation.
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