DE2531148
An answering device in a system for automatic wireless transmission of an item of information coded by a plurality of frequencies is disclosed herein. An interrogation device movable with respect to the answering device transmits an interrogation signal having a frequency which periodically varies w...
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| Main Authors | , , |
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| Format | Patent |
| Language | English |
| Published |
31.08.1978
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| Edition | 2 |
| Subjects | |
| Online Access | Get full text |
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| Abstract | An answering device in a system for automatic wireless transmission of an item of information coded by a plurality of frequencies is disclosed herein. An interrogation device movable with respect to the answering device transmits an interrogation signal having a frequency which periodically varies within a predetermined microwave frequency band. The answering device has a plurality of microwave resonators, each of which has a fixed frequency. A microwave diode is coupled to each of the resonators for preventing a response to the interrogation signal by either damping or detuning the resonator fixed frequency when a control voltage is applied. The control voltage means connected to each of the microwave diodes switches certain of the resonators to an inoperative condition to establish a set of frequencies at which the resonators will respond which corresponds to the information to be transmitted. |
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| AbstractList | An answering device in a system for automatic wireless transmission of an item of information coded by a plurality of frequencies is disclosed herein. An interrogation device movable with respect to the answering device transmits an interrogation signal having a frequency which periodically varies within a predetermined microwave frequency band. The answering device has a plurality of microwave resonators, each of which has a fixed frequency. A microwave diode is coupled to each of the resonators for preventing a response to the interrogation signal by either damping or detuning the resonator fixed frequency when a control voltage is applied. The control voltage means connected to each of the microwave diodes switches certain of the resonators to an inoperative condition to establish a set of frequencies at which the resonators will respond which corresponds to the information to be transmitted. |
| Author | BECKER, FRIEDBERT LAUFER, KARL STEINKAMP, JAN |
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| Edition | 2 |
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| Notes | Application Number: DE19752531148 |
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| PublicationCentury | 1900 |
| PublicationDate | 19780831 |
| PublicationDateYYYYMMDD | 1978-08-31 |
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| PublicationDecade | 1970 |
| PublicationYear | 1978 |
| RelatedCompanies | SIEMENS AG, 1000 BERLIN UND 8000 MUENCHEN |
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| Snippet | An answering device in a system for automatic wireless transmission of an item of information coded by a plurality of frequencies is disclosed herein. An... |
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| SubjectTerms | ENSURING THE SAFETY OF RAILWAY TRAFFIC GUIDING RAILWAY TRAFFIC PERFORMING OPERATIONS RAILWAYS TRANSPORTING |
| Title | DE2531148 |
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