Telecommunications – Transmitter and receiver at same station – Having particular housing or support of a transceiver
Reexamination Certificate
1998-02-10
2001-04-10
Urban, Edward F. (Department: 2683)
Telecommunications
Transmitter and receiver at same station
Having particular housing or support of a transceiver
C343S702000, C343S721000
Reexamination Certificate
active
06215984
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an antenna intended for a radiocommunication transmitter/receiver, having the appearance of a pin, comprising a light source situated outside the antenna and comprising a light pipe with a light-diffusing part.
The invention also relates to a radiocommunication transmitter/receiver having an antenna.
The invention applies, for example, to cellular telephones.
BACKGROUND OF THE INVENTION
An antenna having a light source is described in U.S. Pat. No. 2,473,981 (Wood). The antenna described by this document comprises a light bulb which diffuses light in a transparent sleeve which surrounds the metallic electric conductor which forms the antenna itself.
SUMMARY OF THE INVENTION
It is an object of the invention to improve both the efficiency of the antenna, its reliability and its cost.
For this purpose, the antenna itself comprises a helical electric part formed by a metallic spring and at least partly surrounds the light pipe.
This permits to transmit light through the electric part of the antenna, without the latter blacking out the light.
In a particular embodiment, the light source produces light in the form of flashes.
Advantageously, the light pipe and the light-diffusing part are made into one, the light-diffusing part being formed by a treatment which renders the surface light-diffusing and which is applied to a part of the surface of the light pipe.
Preferably, the light-diffusing part is situated near to an end of the pin. The light signal is more visible in this way.
In a particular embodiment, the light-diffusing surface is surrounded by an envelope of translucent material.
The light pipe is advantageously formed by a bundle of flexible optical fibers.
In the case of a retractable antenna, this permits of making a loop with the fiber outside the antenna so that the loop is enabled to follow the movement of the antenna.
A radiocommunication transmitter/receiver advantageously includes an antenna according to the invention.
In a particular embodiment in which the transmitter/receiver is suitable for receiving a call, the transmitter/receiver comprises means for activating the light source when such a call is detected.
In another particular embodiment in which the transmitter/receiver has control keys, it comprises means for activating the light source when any key is pressed by a user.
REFERENCES:
patent: 2473981 (1949-06-01), Wood
patent: 2522189 (1950-07-01), Morrow
patent: 3108277 (1963-10-01), Thomas
patent: 4039894 (1977-08-01), Gardner, III
patent: 4247858 (1981-01-01), Eichweber
patent: 5625459 (1997-04-01), Driver
patent: 5905475 (1999-05-01), Annamaa
patent: 5907307 (1999-05-01), Bickert et al.
patent: 5915855 (1999-06-01), Murase et al.
patent: 5917453 (1999-06-01), Uchino et al.
patent: 6025816 (2000-02-01), Den et al.
patent: 6054966 (2000-04-01), Haapala
patent: 0716819A (1995-04-01), None
Figueras Eric
Meyer Axel
Halajian Dicran
Tran Congvan
U.S. Philips Corporation
Urban Edward F.
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