Two-Beam Slot Antenna for Power Harvesting Applications

In this paper a new design of a double-slot antenna fed by microstrip line is proposed for power harvesting applications at Ka band. The antenna consists of two parallel slot radiators connected with CPW line in the middle. Radiation pattern of this antenna is optimized to exhibit the maximum gain of 9 dBi in two directions that are offset 40 degrees in respect to the antenna broadside. Proposed antenna is suitable for powering wireless sensor nodes and passive RF identification tags with known RF source when the frequency and direction of arrival of the field are known.