University of South Florida

University of Vermont and State Agricultural College

Sciperio, Inc

Ramiro Augusto Ramirez

Thomas McCrea Weller

Eduardo Antonio Rojas

Kenneth H Church

Paul Deffenbaugh

Casey W Perkowski

Jeffrey Frolik

Marcia Golmohamadi

An apparatus includes a substrate and an electronic circuit comprising a plurality of conductive tracts forming a printed litz line on the substrate for distributing a signal therebetween in order to increase effective conductance relative to a single conductive line not divided into tracts. The plurality of conductive tracts may be formed by printing a pattern on the substrate and removing portions of the pattern to leave the plurality of conductive tracts. The removing portions of the pattern may be performed by a removal process such as laser cutting, milling, etching, or masking. For example, the removal may be performed by applying ultrashort laser pulses. The printing may be performed by a jetting process, a spray process, an extrusion process, a dispensing process, and/or other types of processes for applying materials.

Printed litz line

In various embodiments, a three-dimensional (3D) printed tripolar antenna fabricated through additive manufacturing techniques to match the geometries of various commercial wireless node packages is provided. The antenna systems are designed to mitigate harsh channel conditions by implementing polarization diversity between three mutually orthogonal monopoles.

3D tripolar antenna and method of manufacture

In one embodiment, a radio-frequency identification (RFID) tag includes a substrate having a top surface including first and second ends, a bottom surface, first and second end surfaces, and opposed lateral surfaces, a passive RFID integrated circuit (IC) chip mounted to the top surface of the substrate, a monopole antenna that includes a planar radiating arm that extends out from the RFID IC chip along the top surface of the substrate to the first end of the top surface of the substrate and a matching loop having two grounded matching stubs that surround the chip and a portion of the radiating arm, each matching stub comprising a longitudinal segment that extends along a longitudinal direction of the substrate and a transverse segment that extends along a transverse direction of the substrate along the top surface of the substrate to the radiating arm at a point located between the RFID IC chip and the first end of the top surface, and a ground plane formed on the bottom surface, the second end surface, and the top surface of the substrate, the ground plane wrapping around the substrate so as to extend from the second end of the top surface toward the RFID IC chip and being electrically coupled to the matching stubs and the radiating arm.

RFID tags for on- and off-metal applications

In one embodiment, a radio-frequency identification (RFID) tag includes multiple orthogonal substrates, a passive RFID integrated circuit chip mounted to one of the substrates, and a three-dimensional tag antenna electrically connected to the chip and extending to each of the orthogonal substrates.

Three-dimensionals RFID tags

In one embodiment, a radio-frequency identification (RFID) tag including a substrate having a top surface, bottom surface, opposed end surfaces, and opposed lateral surfaces, a passive RFID integrated circuit (IC) chip mounted to the top surface of the substrate, a monopole antenna that includes a planar radiating arm that extends out from the RFID IC chip along the top surface of the substrate and a matching loop having two grounded matching stubs that surround the chip and a portion of the radiating arm, and a ground plane formed on the bottom surface, an end surface, and the top surface of the substrate, the ground plane being electrically coupled to the matching stubs and the radiating arm.

Growing community of inventors

Tampa, FL, United States of America

Ramiro Augusto Ramirez