Frequency band switching of an antenna arrangement

Details Frequency band switching of an antenna arrangement Frequency band switching of an antenna arrangement

2007-07-10

2007-07-10

Chen, Shih-Chao (Department: 2821)

Communications: radio wave antennas

Antennas

With radio cabinet

C343S876000

Reexamination Certificate

active

11286903

ABSTRACT:
A portable communication device includes an antenna arrangement in its interior. The antenna arrangement comprises at least one first radiating antenna element dimensioned for radiation in a first frequency band, and a first mechanically movable extension element, movable between at least two different fixed positions and being connected to the first radiating antenna element in at least one of the positions for radiating together with the first radiating antenna element. When the extension element is being moved from one position to another, it adjusts the electrical length of the combined first radiating antenna and extension element for enhancing radiation in a second frequency band. In this way a small sized multiband antenna arrangement is provided that keeps the efficiency of the different bands high.

REFERENCES:
patent: 4914714 (1990-04-01), Tamura
patent: 6753827 (2004-06-01), Oshiyama et al.

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