| (19) |
 |
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(11) |
EP 0 308 830 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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02.05.1990 Bulletin 1990/18 |
| (43) |
Date of publication A2: |
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29.03.1989 Bulletin 1989/13 |
| (22) |
Date of filing: 16.09.1988 |
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| (51) |
International Patent Classification (IPC)4: H01Q 3/26 |
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| (84) |
Designated Contracting States: |
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DE FR GB |
| (30) |
Priority: |
22.09.1987 JP 238414/87
|
| (71) |
Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA |
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Tokyo (JP) |
|
| (72) |
Inventors: |
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- Aoki, Toshihiko
c/o Mitsubishi Denki K.K.
Kamakura-shi
Kanagawa-ken (JP)
- Katagi, Takashi
c/o Mitsubishi Denki K.K.
Kamakura-shi
Kanagawa-ken (JP)
- Orime, Nobutake
c/o Mitsubishi Denki K.K.
Kamakura-shi
Kanagawa-ken (JP)
- Hishinuma, Susumu
c/o Mitsubishi Denki K.K.
Kamakura-shi
Kanagawa-ken (JP)
- Ogiso, Koushi
c/o Mitsubishi Denki K.K.
Kamakura-shi
Kanagawa-ken (JP)
- Nishioka, Yasuhiko
c/o Mitsubishi Denki K.K.
Kamakura-shi
Kanagawa-ken (JP)
|
| (74) |
Representative: Pfenning, Meinig & Partner |
|
Mozartstrasse 17
80336 München
80336 München (DE) |
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| |
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(57) An antenna system for transmitting radio waves in the same direction as the direction
of arrival of incoming radio waves. The arrival direction is detected by a fast Fourier
transform processor (8). The transmitting direction is adjusted by phase-shifting
(11) radio waves from a feeder (10) on the basis of the detected arrival direction.
Further, signals in the system are transmitted through optical fibers (6) in order
to decrease the processing time.