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August 28, 2014

Mtg: Miniaturized Passive Radios for Wireless Tagging and IoT Applications

by @ 7:51 pm. Filed under ALL, Communications, Electronics Design, Semiconductors

THURSDAY September 18, 2014
SCV Solid State Circuits Chapter
– battery-less, transponders, data-rate, range …
Speaker: Prof. Amin Arbabian, Electrical Engineering Department, Stanford University
Time: Networking and snacks at 6:00 PM; Presentation at 6:30 PM
Cost: none
Place: Texas Instruments Auditorium, 2900 Semiconductor Dr., Santa Clara
RSVP: from website

For over a hundred years and starting from Marconiâ??s experiment, several generations of wireless devices have connected people with stations and with each other, resulting in over 6 billion mobile subscribers in the world today.  The next exponential growth in connectivity is no longer in access between people but in connecting objects and machines in the age of â??Internet of Things (IoT)â?.  Projections show sensor demand growing from billions in 2012 to trillions within the next decade and this is largely fueled by emergence of smart sensors that combine computation, communication, and sensing.
In terms of connectivity, battery-less radios are the ultimate frontier in scaling the size and cost of a communication node.  However, there are several key challenges that still need to be addressed in this area.  Cost (dominated by board and interfaces), number of readable transponders (and latency in doing so), data-rate, localization and miniaturization are the issues faced by todayâ??s technologies.   Addressing these challenges will open up new application areas for IoT. This could be in commercial, medical or industrial domains.
This talk will present a single-chip 24GHz/60GHz passive and pad-less radio implemented in 65nm CMOS.  This chip is fully self-sufficient with no pads or any external components (e.g. power supply).  It integrates RX and TX antennas and provides a communication range up to 50 cm.  A modified
M-PPM 60GHz transmitter is used to communicate the data sequence.  A multi-access algorithm is implemented to enable communication with thousands of radios.  Pulse signaling enables real-time localization through time-of-flight.  The chip operates with a standby recovered power of less than 1.5uW coming from the base station.


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