Communications: radio wave antennas – Antennas – With radio cabinet
Reexamination Certificate
2000-07-24
2001-07-24
Wimer, Michael C. (Department: 2821)
Communications: radio wave antennas
Antennas
With radio cabinet
Reexamination Certificate
active
06266020
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is related to a hidden antenna device of a mobile phone, and especially to an antenna device of which the antenna is directly provided in the interior of the mobile phone to thereby save the out- extending portion of the antenna.
2. Description of the Prior Art
A mobile phone is a communication instrument carriable on one's person, it is not connected with a conductor normally, and is powered by batteries. Thereby it must transmit and receive signals by aiding of an antenna.
Conventional mobile phones available now are divided into a fixed and a stretchable type no matter they are of the kind with single frequency or two frequencies. The fixed type directly has its antenna rod with an internal inductive coil fixed on the top of the body of the phone. While the stretchable type normally has the antenna separated into multiple sections to be pull to stretch out when in use and to be pushed to contract back into the body of the phone when not in use. Whichever the style of structure of the antenna is used, a predetermined length of it is protruded from the top of the body of the phone, this not only is inconvenient for carrying, but also makes its mobile phone difficult to be miniaturized.
Mobile phones have been being gradually popularized in the recent years, there have been quite a lot of improvements in design of mobile phones, some gave improvements in the structure of the antennae of mobile phones, some in the structure of the connector of the antennae of mobile phones, most of them are related to improved structure of the accessories for transmitting or receiving signals or related accessories of antennae for assembling the antennae, the defect stated above of an antenna in protruding from the top of the body of a mobile phone has not yet been gotten rid of.
And more, the antennae available presently generally shall suit 900 MHZ and 1800 MHZ, however, under the tendency that mobile phones get more and more miniaturized, it is generally not ideal to use an antenna for the low frequency 900 MHZ.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a hidden antenna device of a mobile phone, the antenna is provided in the body of the phone, there is no any exposed member of the antenna to the exterior of the phone. This is most suitable for carrying and for being miniaturized of the mobile phone.
To obtain this object, the present invention is directly provided in the bottom surface of the rear housing (where the electric circuit board is) of the main body of the mobile phone with a printed electric circuit for the antenna. The printed electric circuit for the antenna electrically connected with the connecting points on the electric circuit board on the main body through the essential interlayers of air, ceramics and a matching electric circuit board to form a hidden antenna device of a mobile phone without any exposed member of the antenna.
The electric circuit for the antenna in the bottom surface of the rear housing stated above can be a low frequency (900 MHZ) electric circuit for transmitting and receiving signals. While the matching electric circuit board can be a high frequency (1800 MHZ) electric circuit for the antenna matchable with the low frequency (900 MHZ) electric circuit, and is provided with a plurality of connecting points to connect respectively with the electric circuit board of the main body and the printed electric circuit for the antenna in the bottom surface of the rear housing. The low frequency electric circuit for the antenna in the bottom surface of the rear housing owns a larger distributing area; thereby it has superior signal transmitting and receiving function.
The present invention will be apparent in its novelty and other characteristics after reading the detailed description of the preferred embodiment thereof in reference to the accompanying drawings.
REFERENCES:
patent: 6195049 (2001-02-01), Kim et al.
Auden Technology Mfg. Co. Ltd.
Dougherty & Troxell
Wimer Michael C.
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