Impinj, Inc.

Impinj, International Ltd.

Other

Synopsys, Inc.

Virage Logic Corporation

Ronald A Oliver

Christopher J Diorio

John D Hyde

Harley K Heinrich

Ronald Lee Koepp

Todd E Humes

Theron Stanford

Jay A Kuhn

William T Colleran

Shailendra Srinivas

Vincent C Moretti

Jay Michael Fassett

Scott A Cooper

Yanjun Ma

Omer Onen

Jaideep Mavoori

Yael Gregory Maguire

Tan Mau Wu

Charles J T Peach

Steven I Mozsgai

Robert M Glidden

Ernest Allen, Iii

Gregory T Kavounas

Andrew Edward Horch

Alberto Pesavento

Kurt Eugene Sundstrom

Vadim Gutnik

Kambiz Rahimi

Michael H Thomas

Dennis Kiyoshi Hara

David D Dressler

Mendy M Ouzillou

Zhuohui Zhang

Ramone Antone Hecker

Dimitri C Desmons

An RFID IC may operate at a relatively low clock frequency while impedance matching to an antenna is being tuned to increase the amount of power that the IC can extract from an incident RF wave. A tuning circuit tunes the impedance matching by adjusting a variable impedance coupling the IC and the antenna. The IC may power-up with a low clock frequency or reduce its current clock frequency to a lower clock frequency prior to tuning or during the tuning process, and may increase its clock frequency upon completion of tuning or during the tuning process.

RFID tag clock frequency reduction during tuning

An RFID integrated circuit, in addition to having conductive pads to electrically couple to an antenna, may also include a conductive bridge configured to electrically connect different portions of the antenna together. In some embodiments, the conductive bridge may be used to form a multi-turn antenna segment.

RFID integrated circuits with electrical bridges

Methods of RFID tag assembly include affixing an antenna to an integrated circuit (IC) by forming one or more capacitors coupling the antenna and the IC with the dielectric material of the capacitor(s) including a non-conductive covering layer of the IC, a non-conductive covering layer of the antenna such as an oxide layer, and/or an additionally formed dielectric layer. Top and bottom plates of the capacitor(s) are formed by the antenna traces and one or more patches on a top surface of the IC.

RFID tag assembly methods

Embodiments are directed to a Radio Frequency Identification (RFID) integrated circuit (IC) having a first circuit block electrically coupled to first and second antenna contacts. The first antenna contact is disposed on a first surface of the IC and the second antenna contact is disposed on a second surface of the IC different from the first surface. A substrate of the RFID IC, or a portion of the IC substrate, electrically couples the first circuit block to at least one of the first and second antenna contacts. The IC includes one or more interfaces or barrier regions that at least partially electrically isolate the first circuit block from the rest of the IC substrate.

RFID integrated circuits with antenna contacts on multiple surfaces

A synthesized-beam transceiver system steers a beam of a two-dimensional antenna array by activating a first subset of antenna elements to orient the beam in a first direction and subsequently activating a second subset of the antenna elements to orient the beam in a different direction. The system also electrically connects antenna elements that are inactive, not in the first subset, or not in the second subset to a reference potential of the array.

Synthesized-beam RFID reader system with gain compensation and unactivated antenna element coupling suppression

Crossover for RFID IC terminals

An Integrated Circuit (IC) for an RFID tag includes at least two antenna ports for coupling to at least two antennas. The IC may be configured to determine the port from which it receives an input signal, and provide a first functionality if it receives the input from a first port and a second functionality if it receives the input from a second port. The IC may be configured to determine and/or offer a functionality based on the receiving port.

RFID tags with port-dependent functionality

An RFID tag tuning circuit may be capable of adjusting the impedance matching between an RFID integrated circuit (IC) and an antenna on an RFID tag to increase the amount of power that the IC can extract from an incident RF wave. The tuning circuit switches a variable impedance coupling the antenna and the IC between several different impedance settings, where each impedance setting differs from an adjacent impedance setting by a respective impedance step size and at least one impedance step size has a different value than another impedance step size. The tuning circuit may switch the variable impedance by incrementing through a counter, decrementing through the counter, or performing some search algorithm. The tuning circuit may also initialize the variable impedance based on a default impedance setting or a random impedance setting derived from a random counter.

Self-tuning of RFID tags using nonuniform impedance steps

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Seattle, WA, United States of America

Ronald A Oliver