Interrogating station for identification purposes, with separate transmitting and receiving antennae
First Claim
Patent Images
1. A system for interrogation and identification of an object moved along an interrogation path, comprising:
- an antenna system for transmitting interrogation signals and for receiving an identification code transmitted by a transponder fixed to the object, and a transmit-receive unit for supplying an antenna control signal and for receiving the identification code respectively, wherein, the antenna system comprises at least one separate interrogating antenna and more than one separate receiving antennae, and the transmit-receive unit contains a transmit circuit and plural receive circuits, both circuits being separated by a transmit-receive switch and for each receiving antenna there exists a corresponding receive circuit.
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Accused Products
Abstract
Where a signal is to be sent to a transponder passing by an interrogation station, and a signal is to be received back from the device, the station should include one antenna for sending, one or more separate antennas for receiving, and a circuit including a transmit portion, one or more receive portions, and a transmit-receive switch portion.
140 Citations
10 Claims
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1. A system for interrogation and identification of an object moved along an interrogation path, comprising:
an antenna system for transmitting interrogation signals and for receiving an identification code transmitted by a transponder fixed to the object, and a transmit-receive unit for supplying an antenna control signal and for receiving the identification code respectively, wherein, the antenna system comprises at least one separate interrogating antenna and more than one separate receiving antennae, and the transmit-receive unit contains a transmit circuit and plural receive circuits, both circuits being separated by a transmit-receive switch and for each receiving antenna there exists a corresponding receive circuit. - View Dependent Claims (2)
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3. A method for interrogation and identification of an object having a transponder fixed thereto and moving along an interrogation path comprising the steps of:
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generating interrogation signals by a transmit/receive unit which includes a transmit circuit and plural receive circuits; transmitting said interrogation signals from at least one frame antenna disposed around said interrogation path to a transponder attached to said object moving along said interrogation path; receiving said interrogation signal by said transponder and transmitting an identification code from said transponder; receiving said identification code by more than one separate receiving antennae, each connected to a corresponding one of the receive circuits in said receive unit; and maintaining said transmit circuit and said plural receive circuit separate by a transmit-receive switch. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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Specification