Impinj, Inc.

Omer Onen

Ronald A Oliver

Christopher J Diorio

Mike Thomas

Joe Tarantino

Vincent C Moretti

John D Hyde

Harley K Heinrich

Theron Stanford

Michael H Thomas

Charles Peach

Mendy M Ouzillou

RFID readers may be configured to supply power to tags during frequency hops. When a reader is supplying power to a passive RFID tag via a first RF waveform having a first radio frequency and determines that it is to frequency-hop, the reader may determine whether the tag requires power during the hop. If so, the reader begins (or continues) to synthesize a second RF waveform with a second radio frequency while also synthesizing the first RF waveform, and frequency-hops by transitioning from transmitting the first RF waveform to transmitting the second RF waveform such that the power transmitted during the transition is sufficient for the tag to operate.

Fast frequency switching for RFID applications

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

An RFID tag tuning circuit is capable of tuning 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 tunes the impedance matching by adjusting a variable impedance coupling the antenna and the IC. Prior to tuning, the variable impedance is set using a voltage output from a tuning switch stage of an IC rectifier.

Increasing dynamic range of RFID tag self-tuning

Radio frequency identification (RFID) reader devices are disclosed. An RFID reader device of one aspect may include a radio frequency (RF) output port operable to allow a plurality of RFID antenna modules to be coupled with the RFID reader device. An RF signal generator of the device may be coupled with the RF output port. The RF signal generator may be operable to generate an RF signal and provide the RF signal to the RF output port. A select signal generator of the device may be operable to generate a select signal. The select signal may be operable to be output to select one or more of the plurality of RFID antenna modules.

RFID reader devices and methods thereof

Circuits, devices and methods for use in RFID tags include receiving multiple RF signals from multiple ports. The signals are added after some processing, to produce a single combined signal. Additional components process the single combined signal by itself.

Growing community of inventors

Redmond, WA, United States of America

Omer Onen