| 摘要 |
<p>The description refers to an assembly for locating objects, comprising a transmitter for transmitting a specific radio signal and a receiver to be attached to an object for receiving the transmitted radio signal and delivering a response signal in response thereto. The receiver is further provided with a return transmitter for transmitting a response radio signal, whilst the transmitter is further provided with a secondary receiver for receiving the response radio signal and generating a warning signal in response thereto. Preferably, the radio signal transmitted by the transmitter constitutes a microwave signal and preferably further is beam-shaped.</p> |
