PULSED ELECTRONIC ARTICLE SURVEILLANCE DETECTION SYSTEM ABSENT OF A PHASING REQUIREMENT
Systems and methods for detecting a marker in a pulsed Electronic Article Surveillance (“EAS”) system. The methods comprise transmitting, from an EAS detection system, an excitation signal having a first frequency into an interrogation zone during a transmit phase of the EAS detection system. The excitation signal causes the marker to transmit a response signal having a second frequency different from the first frequency. The response signal is received at the EAS detection system during a receive phase of the EAS detection system.
1 . A method for detecting a marker in a pulsed Electronic Article Surveillance (“EAS”) system, comprising:
transmitting, from an EAS detection system, an excitation signal having a first frequency into an interrogation zone during a transmit phase of the EAS detection system, the excitation signal causing the marker to transmit a response signal having a second frequency different from the first frequency; and
receiving the response signal at the EAS detection system during a receive phase of the EAS detection system.
2 . The method according to claim 1 , wherein the first frequency has a value that is unable to be detected by a receiver of the EA second frequency.
3 . The method according to claim 1 , wherein the second frequency is less than the first frequency.
4 . The method according to claim 1 , wherein the second frequency is greater than the first frequency.
5 . The method according to claim 1 , wherein the EAS detection system comprises a magnetic based EAS detection system.
6 . The method according to claim 1 , wherein the marker comprises a first coil, a second coil, a core on which the first and second coils are disposed, and a timing circuit electrically coupled to the first and second coils.
7 . A method for operating an Electronic Article Surveillance (“EAS”) system, comprising:
transmitting, from an EAS detection system, an excitation signal having a first frequency into an interrogation zone during a transmit phase of the EAS detection system;
receiving the excitation signal at a marker located within the interrogation zone;
generating, by the marker, a response signal in response to the excitation signal, the response signal having a second frequency different from the first frequency;
transmitting the response signal from the marker; and
receiving the response signal at the EAS detection system during a receive phase of the EAS detection system.
8 . The method according to claim 7 , wherein the first frequency has a value that is unable to be detected by a receiver of the second frequency.
9 . The method according to claim 7 , wherein the second frequency is less than the first frequency.
10 . The method according to claim 7 , wherein the second frequency is greater than the first frequency.
11 . The method according to claim 7 , wherein the EAS detection system comprises a magnetic based EAS detection system.
12 . The method according to claim 7 , wherein the marker comprises a first coil, a second coil, a core on which the first and second coils are disposed, and a timing circuit electrically coupled to the first and second coils.
13 . A pulsed Electronic Article Surveillance (“EAS”) system, comprising:
a marker; and
an EAS detection system comprising a circuit configured to
transmit an excitation signal having a first frequency into an interrogation zone during a transmit phase of the EAS detection system, the excitation signal causing the marker to transmit a response signal having a second frequency different from the first frequency, and
receive the response signal during a receive phase of the EAS detection system.
14 . The pulsed EAS system according to claim 1 , wherein the first frequency has a value that is unable to be detected by the second frequency.
15 . The pulsed EAS system according to claim 1 , wherein the second frequency is less than the first frequency.
16 . The pulsed EAS system according to claim 1 , wherein the second frequency is greater than the first frequency.
17 . The pulsed EAS system according to claim 1 , wherein the EAS detection system comprises a magnetic based EAS detection system.
18 . The pulsed EAS system according to claim 1 , wherein the marker comprises a first coil, a second coil, a core on which the first and second coils are disposed, and a timing circuit electrically coupled to the first and second coils.