Wireless unit antenna apparatus and mobile wireless unit

Details Wireless unit antenna apparatus and mobile wireless unit Wireless unit antenna apparatus and mobile wireless unit

2006-09-06

2010-12-14

Dinh, Trinh V (Department: 2821)

Communications: radio wave antennas

Antennas

With radio cabinet

C343S724000, C343S725000, C343S726000, C343S853000, C343S860000

Reexamination Certificate

active

07852272

ABSTRACT:
The present invention provides an antenna apparatus for a wireless unit, the antenna apparatus exhibiting a reduced specific absorption rate (SAR) without an additional component for reducing the SAR, which is the amount of energy of an electromagnetic wave absorbed by a human body. The antenna apparatus comprises a board114serving as a ground plate of an antenna, a first antenna element102transmitting and receiving an electromagnetic wave in a first frequency band and provided on the board114through the first feeder107, and a second antenna element110transmitting and receiving an electromagnetic wave in a second frequency band and provided on the board114through the first feeder111, wherein the total of an electrical length between the first and second feeders107and111, an electrical length of the first antenna element102, and an electrical length of the second antenna element110is larger than a half wavelength of the first frequency band and equal to or smaller than one wavelength of the first frequency band.

REFERENCES:
patent: 6295030 (2001-09-01), Kozakai et al.
patent: 6310578 (2001-10-01), Ying
patent: 6380903 (2002-04-01), Hayes et al.
patent: 7084831 (2006-08-01), Takagi et al.
patent: 7102587 (2006-09-01), Benton et al.
patent: 2002/0021253 (2002-02-01), Muramoto et al.
patent: 1 562 259 (2005-08-01), None
patent: 2005-223686 (2005-08-01), None

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