H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
H01Q 23/00 (2006.01) H01Q 1/22 (2006.01) H01Q 1/38 (2006.01) H01Q 13/10 (2006.01) H04B 1/59 (2006.01)
Patent
CA 2298268
A passive transponder comprises an antenna (1, 2) in the form of a metal body with two main surfaces and a diode (3) connected between the main surfaces and a dielectric (10) surrounding the antenna. A characteristic of the invention is that the impedance of the antenna is adapted to the impedance of the diode by matching unit (13, 14). A transmission line (8) is used as the matching unit. Another characteristic for the invention is that the transmission line is surrounded by a dielectric (10) made of plastic. Yet another characteristic of the invention is that the antenna is surrounded by a dielectric made of plastic which reduces the influence of the surroundings on the near field of the antenna.
Fuks Peter
Granhed Magnus
Rehn Anders
Granhed Magnus
Recco Invest Ab
Smart & Biggar
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