RFID SYSTEM WITH RF BUS

• US 20100276498A1
• Filed: 04/19/2010
• Published: 11/04/2010
• Est. Priority Date: 03/16/2006
• Status: Active Grant

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rofougaran, Ahmadreza (Reza)
• Granted Patent: US 7,885,600 B2
• Time in Patent Office: Days
• US Class Current: 235/492
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: H04B 1/525 with means for reducing leakage of transmitter signal into the receiver
• CPC Class Codes: H04B 5/77 for interrogation
• CPC Class Codes: H04L 12/2801 Broadband local area networks
• CPC Class Codes: H04W 52/52 using AGC [Automatic Gain Control] circuits or amplifiers
• CPC Class Codes: H05K 1/024 Dielectric details, e.g. changing the dielectric material around a transmission line
• CPC Class Codes: H05K 1/036 Multilayers with layers of different types
• CPC Class Codes: H05K 2201/10098 Components for radio transmission, e.g. radio frequency identification [RFID] tag, printed or non-printed antennas

Abstract

A radio frequency identification (RFID) system includes an RFID reader, an RFID tag, and a network connection module. The RFID reader includes a reader radio frequency (RF) bus transceiver. The network connection module includes a network connection RF bus transceiver, wherein the reader RF bus transceiver exchanges at least one of inbound RFID data and outbound RFID data with the network RF bus transceiver via an RF bus.

Claims

1. A 60 GHz radio frequency identification (RFID) tag integrated circuit (IC) comprises:

an antenna structure on a die, wherein the antenna structure is sized for operation in a 60 GHz frequency band;

a power recovery circuit on the die, wherein the power recovery circuit converts a radio frequency (RF) signal received via the antenna structure into a supply voltage;

an oscillation module on the die and powered by the supply voltage, wherein the oscillation module produces an oscillation having a frequency approximately equal to a carrier frequency of the RF signal;

a data recovery module on the die and powered by the supply voltage, wherein the data recovery module is clocked via the oscillation to recover data from the RF signal;

a processing module on the die and powered by the supply voltage, wherein the processing module processes the recovered data and, when indicated within the recovered data, generates RFID tag response data; and

transmitting circuit on the die and powered by the supply voltage, wherein the transmitting circuit provides the RFID tag response data to the antenna structure for transmission as an RF RFID response signal.

2. The RFID tag of claim 1, wherein the oscillation module comprises:

a quarter wavelength microstrip;

a pulse stimulator circuit coupled to provide a low frequency periodic pulse to the quarter wavelength microstrip to stimulate self-resonance of the quarter wavelength microstrip; and

an amplifier circuit coupled to the quarter wavelength microstrip to produce the oscillation from the self-resonance of the quarter wavelength microstrip.

3. The RFID tag of claim 1, wherein the antenna structure comprises:

a half wavelength planer dipole antenna; and

a transmission line coupled to the half wavelength planer dipole antenna.