Abstract: A wireless tag comprises a chip; an antenna; at least one conductive structure, the conductive structure and the chip being coupled by a common electrical connection to ground; and a filter electrically interposed along an electrical connection between the chip and the conductive structure; wherein the filter causes a reduction in amplitude of a signal passing between the conductive structure and the chip or an electrical disconnection between the conductive structure and the chip at around a prescribed frequency.

Abstract: A tag, comprises: a first loop antenna connected to a chip for harvesting energy at a first frequency and being located on a first side of the chip; a second loop antenna connected to the chip for use in wireless communication using a frequency range and being located on a side of the chip opposite the first side; and a third loop antenna connected to the chip for harvesting energy at a frequency lower than the first frequency and the frequency range and having a portion of its loop (i) proximal to a portion of both the first and second antennas and (ii) extends parallel to a side of the chip perpendicular to the first side, and having a portion that is parallel to the first chip side; wherein a circumference of the third antenna is greater than a greatest circumference of the first and second antennas.

Abstract: A tag, comprises: a first loop antenna connected to a chip for harvesting energy at a first frequency and being located on a first side of the chip; a second loop antenna connected to the chip for use in wireless communication using a frequency range and being located on a side of the chip opposite the first side; and a third loop antenna connected to the chip for harvesting energy at a frequency lower than the first frequency and the frequency range and having a portion of its loop (i) proximal to a portion of both the first and second antennas and (ii) extends parallel to a side of the chip perpendicular to the first side, and having a portion that is parallel to the first chip side; wherein a circumference of the third antenna is greater than a greatest circumference of the first and second antennas.

Abstract: A wireless tag comprises a chip; an antenna; at least one conductive structure, the conductive structure and the chip being coupled by a common electrical connection to ground; and a filter electrically interposed along an electrical connection between the chip and the conductive structure; wherein the filter causes a reduction in amplitude of a signal passing between the conductive structure and the chip or an electrical disconnection between the conductive structure and the chip at around a prescribed frequency.

Abstract: An antenna for harvesting energy from frequency modulation radio signals are provided. An antenna for harvesting energy from frequency modulation (FM) radio signals includes a loop element coupled to an energy harvester; and an inductive element coupled to the loop element, wherein the inductive element is a planar inductor designed to allow impedance matching with the energy harvester, wherein the inductive element that extends an electric field of the loop element, wherein the loop element and the inductive element resonate at an FM frequency band.