Communications: radio wave antennas – Antennas – With radio cabinet
Reexamination Certificate
2007-12-25
2007-12-25
Le, Hoanganh (Department: 2821)
Communications: radio wave antennas
Antennas
With radio cabinet
C343S7000MS
Reexamination Certificate
active
11396849
ABSTRACT:
The present invention relates to an antenna device and enables the directivity of an antenna element to be changed without affecting the resonance frequency of the antenna element. The antenna device comprises a first grounded conductor, an antenna element mounted on the first grounded conductor via an insulator, a second grounded conductor disposed separate from the first grounded conductor, and a changing unit for changing directivity of the antenna element by adding the second grounded conductor to the first grounded conductor or canceling the addition thereof.
REFERENCES:
patent: 7202823 (2007-04-01), Watanabe
patent: 2005/0239519 (2005-10-01), Saitou et al.
patent: 6-061727 (1994-03-01), None
patent: 8-279771 (1996-10-01), None
patent: 10-190347 (1998-07-01), None
patent: 2001-274616 (2001-10-01), None
Katten Muchin & Rosenman LLP
Le Hoang-anh
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