Telecommunications – Receiver or analog modulated signal frequency converter – Combined with diverse art device
Reexamination Certificate
1997-10-30
2001-02-27
Eisenzopf, Reinhard J. (Department: 2682)
Telecommunications
Receiver or analog modulated signal frequency converter
Combined with diverse art device
C343S715000, C343S901000
Reexamination Certificate
active
06195540
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field of the Invention
The present invention relates to a FM multiple signal receivable navigation apparatus.
2. Description of Related Art
In these days, the navigation system has a function of receiving the road traffic condition which changes in real time through the FM multiple signal receiver and displaying it, in addition to the well known road map display function.
FIG. 6
shows one example of the conventional FM multiple signal receivable navigation apparatus. A GPS signal receiving antenna
13
and a FM multiple signal receiving antenna
14
are erected from a GPS receiver unit
11
and a FM multiple signal receiver unit
12
respectively, and the GPS receiver unit
11
and the FM multiple signal receiver unit
12
are assembled in one unit.
In this case, since the FM multiple signal is within 80 MHz band, and the GPS signal is within 1.5 GHz band, it is necessary to employ two antennas for receiving each wave. Moreover, the FM multiple signal receiving antenna
14
is a rod antenna, and the GPS signal receiving antenna
13
is a patch antenna, thus it is necessary to employ different kinds of antenna. As a result, since the space for the antennas enlarged, there would be some problems of handling or portability.
SUMMARY OF THE INVENTION
To solve the foregoing problems, the present invention provides a FM multiple signal receivable navigation apparatus including a coaxial cable connecting the GPS receiver unit and the GPS antenna. And the shield conductor of the coaxial cable is served as the FM multiple signal receiving antenna.
In this construction, it would be able to share the GPS antenna unit with the FM antenna unit. As a result, the space for the antennas is smaller than that of the conventional apparatus, thus its handling and portability have been improved remarkably.
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patent: 5248988 (1993-09-01), Makino
patent: 5541615 (1996-07-01), Koide et al.
patent: 5543808 (1996-08-01), Feigenbaum et al.
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patent: 5654717 (1997-08-01), Nichols et al.
patent: 0 590 955 A2 (1993-09-01), None
Patent Abstracts of Japan, vol. 096, No. 012, Dec. 26, 1996 & JP 08 204442 A (Mitsumi Electric Co LTD) Aug. 9, 1996, “Antenna Unit And Receiver with the Unit”, Ogino Toshikazu.
Patent Abstracts of Japan, vol. 018, No. 240 (E-1545) May 9, 1994 & JP 06 029711 A (NHK Spring Co LTD), Feb. 4, 1994, “Antenna for Automobile”, Hirai Isamu.
Patent Abstracts of Japan, vol. 095, No. 007, Aug. 31, 1995 & JP 07 099405 A (Asahi Glass Co LTD), Apr. 11, 1995, “Glass Antenna for Automobile”, Terajima Fumitaka.
Ogino Toshikazu
Yamasaki Masashige
Bhattacharya Sam
Eisenzopf Reinhard J.
McGuireWoods LLP
Mitsumi Electric Co. Ltd.
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