Wireless communication systems, interrogators and methods of communicating within a wireless communication system

• US 6,356,764 B1
• Filed: 03/09/1999
• Issued: 03/12/2002
• Est. Priority Date: 03/09/1999
• Status: Expired due to Term

• Current Assignee: Round Rock Research LLC
• Original Assignee: Micron Technology, Inc.
• Inventors: Ovard, David K., Greeff, Roy
• Primary Examiner(s): Hunter, Daniel
• Assistant Examiner(s): LE, LANA N
• Application Number:
  US09/265,074
• Time in Patent Office: 1,099 Days
• Field of Search: 455/456, 455/31.2, 455/458, 455/410, 455/11.1, 340/573.4, 340/988, 340/989, 340/991, 340/990, 340/992
• US Class Current: 455/456.2
• CPC Class Codes: G06K 17/0022 arrangements or provisions for transferring data to distant stations, e.g. from a sensing device "transfer between computer elements G06F13/00 "; data-transmission H04L
• 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: G06K 7/01 Details
• CPC Class Codes: G06K 7/10356 using a plurality of antennas, e.g. configurations including means to resolve interference between the plurality of antennas
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

The present invention relates to wireless communication systems, interrogators and methods of communicating within a wireless communication system. One aspect of the present invention provides a wireless communication system including at least one remote communication device configured to communicate a return link wireless signal; an interrogator including: a communication station configured to receive the return link wireless signal and to generate a return link communication signal corresponding to the return link wireless signal; communication circuitry coupled with the communication station and configured to communicate the return link communication signal; and a housing remotely located with respect to the communication station and including circuitry configured to receive the return link communication signal from the communication circuitry and to process the return link communication signal.

Claims

1. An interrogator of a radio frequency identification system comprising:

a plurality of communication stations individually including;

a first antenna configured to output a forward link wireless signal;

a second antenna configured to receive a return link wireless signal responsive to the outputting of the forward link wireless signal and to output a return link communication signal corresponding to the return link wireless signal; and

a low noise amplifier coupled with the antenna and configured to increase the power of the return link communication signal;

a plurality of coaxial RF cables coupled with the low noise amplifiers of the respective communication stations and individually configured to communicate the return link communication signal of the respective communication station; and

a housing remotely located with respect to the communication stations and including;

a plurality of automatic gain control circuits coupled with respective ones of the coaxial RF cables and configured to adjust at least one electrical characteristic of the respective return link communication signals to output the return link communication signals at a substantially constant level; and

processing circuitry configured to receive the return link communication signals from the automatic gain control circuits and to process the return link communication signals.