Communication apparatus

Details Communication apparatus Communication apparatus

2009-05-29

2011-10-11

Phan, Dao (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including polarized signal communication transmitter or...

C343S876000

Reexamination Certificate

active

08035561

ABSTRACT:
A communication apparatus communicating other apparatuses includes: a switch for switching between a vertical polarized antenna and a horizontal polarized antenna; a communication device for transmitting and receiving the electric wave via one of the antennas, which is selected by the switch; a monitor for monitoring a relative distance between the apparatus and other apparatuses; and a controller for controlling the switch such that the switch selects the vertical polarized antenna when the relative distance is equal to or larger than a distance threshold, and the switch selects the horizontal polarized antenna when the relative distance is smaller than the distance threshold. The distance threshold is larger than a distance between the apparatus and a dip point.

REFERENCES:
patent: 2008/0291097 (2008-11-01), Fukushima et al.
patent: U-58-061509 (1983-04-01), None
patent: A-61-210705 (1986-09-01), None
patent: A-07-191132 (1995-07-01), None
patent: A1-10-145273 (1998-05-01), None
patent: A-2005-150848 (2005-06-01), None

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