Discrete data transponder for identification, comprises two-part casing closely-resembling e.g. clothes button, which contains circuit and antenna

摘要

The casing (2) is button-shaped and is in two parts (3, 4). The second part (4) is inserted into the first (3) or fitted to it. Together they enclose a cavity (2'). Between the parts, a reception chamber (6) is formed for the antenna (A) and electronic circuit (S).