Hyperfrequency system for remote data transmission
First Claim
1. Hyperfrequency system for remote data transmission, of the type consisting of at least one reader (L) associated with a plurality/y of responders (R), with the reader (L) comprising means to generate a hyperfrequency wave with a certain rectilinear polarization, while each responder (R) is fitted with a rectangular flat antenna for reemission (1) capable of receiving said hyperfrequency wave and reemitting it with an orthogonal polarization with a phase modulation at two stages representing the data to be transmitted to the reader (L), characterized in that the phase modulation is obtained by two transistors (Qa, Qb) which are connected to the two adjacent corners (a, b) of antenna (1), respectively;
- these two transistors being alternately blocked and saturated at the rhythm of the data to be transmitted, by additional control signals generated by an appropriate processing unit (4) to alternately short circuit the corresponding corner of the antenna.
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Accused Products
Abstract
Hyperfrequency system for remote data transmission of the type comprises at least one reader (L) associated with a plurality of responders (R) with the reader (L) comprising means to generate a hyperfrequency wave which has a certain rectilinear polarization, while each responder (R) is fitted with a rectangular flat antenna for reemission (1) which is capable of receiving said hyperfrequency wave and reemitting it with orthogonal polarization and phase modulation at two stages representing the data to be transmitted to reader (L), characterized in that the phase modulation is achieved by two transistors (Qa, Qb) which are connected respectively to two adjacent corners (a, b) of antenna (1), these two transistors being alternately blocked and saturated at the rhythm of the data to be transmitted, by additional control signals originating in an appropriate processing unit (4) in order to short circuit alternately the corresponding corner of the antenna.
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Citations
8 Claims
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1. Hyperfrequency system for remote data transmission, of the type consisting of at least one reader (L) associated with a plurality/y of responders (R), with the reader (L) comprising means to generate a hyperfrequency wave with a certain rectilinear polarization, while each responder (R) is fitted with a rectangular flat antenna for reemission (1) capable of receiving said hyperfrequency wave and reemitting it with an orthogonal polarization with a phase modulation at two stages representing the data to be transmitted to the reader (L), characterized in that the phase modulation is obtained by two transistors (Qa, Qb) which are connected to the two adjacent corners (a, b) of antenna (1), respectively;
- these two transistors being alternately blocked and saturated at the rhythm of the data to be transmitted, by additional control signals generated by an appropriate processing unit (4) to alternately short circuit the corresponding corner of the antenna.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
Specification