Patent ID: 8099044

Claim:
A radio frequency detection system, comprising: a first radio frequency detection device with a first transmitter generating a radio frequency signal and connected to a first device antenna with a first detection range for detecting a radio frequency identification element to detect radio frequency identification information provided in the first detection range; a second radio frequency detection device with a second transmitter generating a radio frequency signal and connected to a second device antenna with a second detection range for a radio frequency identification element to detect radio frequency identification information provided in the second detection range; a compensation member connected between said first device antenna and said second device antenna for feeding a compensation current from the first device antenna to said second device antenna to generate in the second detection range, by means of said second device antenna, an opposing magnetic field, which attenuates or extinguishes the magnetic field of said first device antenna in the second device detection range, whereby the radio frequency identification element located in the second detection range cannot be detected by said first detection device antenna.