Placement insensitive antenna for RFID, sensing, and/or communication systems

摘要

An antenna includes a ground plane having a slot. The slot may be miniaturized using a meandered slot structure or other appropriate reactive loading method as an end load to one or both ends of the slot. An edge treatment may be included on one or more edges of the ground plane or a closely spaced reflecting plane. The antenna is structured to transmit or receive a signal independently or in response to electromagnetic radiation.

主权项

1. An apparatus, comprising:
a dielectric layer; an electrical ground layer carried on the dielectric layer, the ground layer defining a slot therein, the slot providing an antenna element; an electrically reactive load element disposed at an end portion of the antenna element; an edge of the ground layer being shaped to selectively expose a portion of the dielectric layer to transmit electromagnetic radiation therefrom, wherein the edge includes a repeated pattern; and an electrically conductive layer positioned on the dielectric layer opposite the ground layer to launch at least a portion of the electromagnetic radiation through the portion of the dielectric layer in a parallel-plate waveguide mode, wherein the electrically conductive layer is not electrically connected to the ground layer.