| http://www.w3.org/ns/prov#value | - The associate radio device may be an rfid device, for example. [0030] The antenna may also be a monopole antenna with a length of 100 mm at most. [0031] In a second preferred embodiment, for an associated radio device operable at 433 MHz, the antenna is a dipole antenna of two parts, each part being not more than 100 mm, and more preferably approximately 65 to 75 mm when embedded in rubber.
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