Communications: radio wave antennas – Antennas – With radio cabinet
Patent
1999-05-26
2000-07-18
Ho, Tan
Communications: radio wave antennas
Antennas
With radio cabinet
343895, 343901, H01Q 124
Patent
active
06091369&
ABSTRACT:
An antenna assembly for reducing the receiving space in a portable phone which employs the antenna assembly and for enhancing the bandwidth and radiation efficiency when the antenna assembly is in a retracted position. The antenna assembly includes a helical antenna and a whip antenna. The helical antenna is powered by capacitive coupling between a conductive layer therein and a feed conductor electrically connected to a signal processing circuit in the portable phone. Also, the whip antenna consists of two stages in a vertical direction in a manner that one of the stages can be retracted into the other one. The helical antenna includes a conducting layer disposed beneath the helical element; the feed conductor electrically connected to the signal processing circuit at least when said antenna assembly is retracted into the portable phone; and an insulating layer disposed between the conducting layer and the feed conductor. The whip antenna includes a spring attached to the antenna rod; a tube having a cylindrical shape capable of receiving at least lower half of the antenna rod; and a stopper attached to the bottom end of the tube and contacting the antenna rod selectively. The tube has a sill at the top end thereof for holding and preventing the spring attached to the antenna rod from slipping out of the tube
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Baek Rack June
Whang In Soo
Ace Technology
Ho Tan
LandOfFree
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