Dual antenna capable of transmitting and receiving...

Details Dual antenna capable of transmitting and receiving... Dual antenna capable of transmitting and receiving...

2005-04-12

2005-04-12

Vannucci, James (Department: 2828)

Communications: radio wave antennas

Antennas

Plural separate diverse type

C343S713000

Reexamination Certificate

active

06879294

ABSTRACT:
A direction of a power feed patch relative to a rod-shaped antenna is set so that a short axis thereof substantially orthogonally crosses a plane containing an intersection between the short axis and a long axis of the power feed patch of a patch antenna and an axis of the rod-shaped antenna. As a plane of polarization of a linearly polarized electromagnetic wave radiated from the rod-shaped antenna is thereby caused to substantially coincide with a direction of the long axis of the power feed patch and to substantially orthogonally cross a direction of the short axis, even if a powerful wave of a higher frequency than a desired frequency to be received by the patch antenna and difficult to be removed by a band pass filter of a low-noise amplifier circuit is radiated from the rod-shaped antenna, field components of the high frequency electromagnetic wave in the direction of the short axis will become virtually zero.

REFERENCES:
patent: 5300936 (1994-04-01), Izadian
patent: 5610620 (1997-03-01), Stites et al.
patent: 5831577 (1998-11-01), Nichols et al.
patent: 6313801 (2001-11-01), Sanford et al.
patent: 295 00 961 (1995-07-01), None
patent: 0 590 955 (1994-04-01), None
patent: 0 862 239 (1998-09-01), None
patent: Hei 10-107542 (1998-04-01), None

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