Antenna unit

Details Antenna unit Antenna unit

2008-05-13

2008-05-13

Wimer, Michael C. (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

C343S846000

Reexamination Certificate

active

07372410

ABSTRACT:
An antenna unit according to an embodiment of the invention includes an antenna that communicates with a RFID and a frequency switch that switches a frequency of a radio wave that the antenna transmits and receives, wherein the antenna includes a radiation plate that radiates a radio wave that communicates with the RFID, a ground plate that is disposed with a predetermined distance separated from the radiation plate and a distance switch that varies a distance between the ground plate and the radiation plate.

REFERENCES:
patent: 6239751 (2001-05-01), McRae et al.
patent: 10-233617 (1998-02-01), None

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