Electronic anti-theft system with correlated transmit/receive antennas
First Claim
Patent Images
1. A method for operating an electronic anti-theft system, which comprises the steps of:
- performing data communication by transmitting and/or receiving electromagnetic access code signals via at least two transmit/receive antennas, the data communication of the access code signals takes place in a first permitted frequency band and also in at least a second permitted frequency band being different from the first permitted frequency band;
correlating the transmission and/or reception of the access code signals for signaling purposes;
performing the data communication of the access code signals at least partially via shared signal paths in the transmit/receive antennas; and
performing a frequency decoupling of the access code signals.
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Abstract
An electronic anti-theft system and an operating method have transmit/receive antennas of different frequencies that are electrically correlated with one another. The data communication of access code signals takes place at least partially via shared signal paths. A frequency decoupling of the access code signals is also performed. The transmit/receive antennas are preferably also embodied as structurally integrated. In this way a substantial simplification of the system and simultaneously also a cost optimization can be achieved.
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Citations
11 Claims
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1. A method for operating an electronic anti-theft system, which comprises the steps of:
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performing data communication by transmitting and/or receiving electromagnetic access code signals via at least two transmit/receive antennas, the data communication of the access code signals takes place in a first permitted frequency band and also in at least a second permitted frequency band being different from the first permitted frequency band; correlating the transmission and/or reception of the access code signals for signaling purposes; performing the data communication of the access code signals at least partially via shared signal paths in the transmit/receive antennas; and performing a frequency decoupling of the access code signals. - View Dependent Claims (2)
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3. An electronic anti-theft system, comprising:
at least two transmit/receive antennas for transmitting and/or receiving electromagnetic access code signals for performing data communication, said at least two transmit/receive antennas include at least a first transmit/receive antenna for data communication of said access code signals in a first frequency band, and at least a second transmit/receive antenna for data communication of said access code signals in a second frequency band being different from the first frequency band, said at least two transmit/receive antennas beinci conficiured to perform the data communications of the access code sicinals at least partially via shared oaths of said at least two transmit/receive antennas, and an at least partially constructional integration of at least a part of said two transmit/receive antennas, the data communication of access code signals taking place in said first frequency band and also in said second frequency band. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11)
Specification