×

EAS system with alternating on/off transmitter operation and loop antenna

  • US 5,327,118 A
  • Filed: 09/08/1993
  • Issued: 07/05/1994
  • Est. Priority Date: 10/28/1992
  • Status: Expired due to Term
First Claim
Patent Images

1. An EAS system for transmitting signals into and receiving signals from an interrogation zone comprising;

  • a first antenna, said first antenna when driven transmitting signals into a first part of said interrogation zone, said first part of said zone being less than said entire zone;

    a second antenna, said second antenna when driven transmitting signals into a second part of said interrogation zone, said second part of said interrogation zone being less than said entire interrogation zone and partially overlapping with said first part of said interrogation zone;

    and means for developing coded message signals and for alternatively driving said first and second antennas with the same coded message signal in its entirety, whereby said first and second antennas transmit first and second signals containing the same entire coded message signal into said first and second parts, respectively, of said interrogation zone.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×