| 摘要 |
A device for information transmission, a so-called transponder, for receiving a first microwave signal, modulating and coding, and retransmission of a second microwave signal comprising at least one antenna means designed in micro strip technique and a ground plane. The device is primarily characterized in that the antenna layer (6) of the antenna means is provided with a recess (8), in which at least some of the electronic components (9, 16) of the transponder and/or micro strip conduits (12, 18) are located. Through this embodiment of the device, the device will be compact, light, inexpensive in manufacturing, and gives a well-defined and directed antenna lobe. The device will thereby have a good range and is especially adapted for use in material handling of for example parcels and containers. |
