Antenna device for mobile radio telephone devices
AssigneeSiemens Aktiengesellschaft
InventorRalf Scholz
Life of this patent
Estimating the term…
Abstract
An antenna device is provided that is particularly suitable for mobile radio telephone device. The antenna device has a first helix antenna, a helix antenna connectible to the first helix antenna as well as an extensible rod antenna. In the extended condition of the rod antenna, a connector element connects only the rod antenna to the first helix antenna. In the retracted condition of the rod antenna, the connector element connects only the second helix antenna to the first helix antenna. An antenna device having a low space requirement is thus created. It is simultaneously assured that, regardless of the retracted or extended condition of the rod antenna, an antenna device that is matched to the optimum transmission/reception power is always formed by a combination of two antennas.
Claims8
An antenna device for mobile radio telephone devices, the device comprising:
- an extensible rod antenna having an extensible free end and an opposite end opposite said free end;
- first helix antenna disposed, when said rod antenna is extended, at said opposite end of said rod antenna;
- a second helix antenna connectible to the first helix antenna and disposed beneath said first antenna at said opposite end of said rod antenna when said rod antenna is extended;
- and
- a connector element that connects only the rod antenna to the first helix antenna when the rod antenna is extended and connects only the second helix antenna to the first helix antenna when the rod antenna is retracted.
A mobile radio telephone device comprising:
- a housing;
- an extensible rod antenna having a free end which is extendable from and retractable to said housing, and having an opposite end opposite said free end;
- a first helix antenna disposed, when said rod antenna is extended, at said opposite end of said rod antenna;
- a second helix antenna connectible to the first helix antenna and disposed beneath said first antenna at said opposite end of said rod antenna when said rod antenna is extended;
- and
- a connector element that connects only the rod antenna to the first helix antenna when the rod antenna is extended and connects only the second helix antenna to the first helix antenna when the rod antenna is retracted.
Dependencies are inferred from the claim text.