| (19) |
 |
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(11) |
EP 0 568 142 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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02.03.1994 Bulletin 1994/09 |
| (43) |
Date of publication A2: |
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03.11.1993 Bulletin 1993/44 |
| (22) |
Date of filing: 21.04.1993 |
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| (51) |
International Patent Classification (IPC)5: H04H 3/00 |
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT |
| (30) |
Priority: |
28.04.1992 EP 92201191
|
| (71) |
Applicant: Philips Electronics N.V. |
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5621 BA Eindhoven (NL) |
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| (72) |
Inventor: |
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- De Bot, Paulus G. M.,
c/o INT. OCTROOIBUREAU B.V.
NL-5656 AA Eindhoven (NL)
|
| (74) |
Representative: De Jongh, Cornelis Dominicus et al |
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INTERNATIONAAL OCTROOIBUREAU B.V.,
Prof. Holstlaan 6
5656 AA Eindhoven
5656 AA Eindhoven (NL) |
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| |
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| (54) |
Improved transmitter network with a single transmitter frequency |
(57) A transmitter network comprising a plurality of transmitters having a like transmitter
frequency may cause disturbance to occur in an adjacent similar transmitter network.
This disturbance is no longer of an echo signal type, so that cancellation thereof
will be more difficult.
For eliminating this disturbance as much as possible, a transmitter network is proposed
in which auxiliary transmitters are used having an aerial height which becomes smaller
according as the edge of the coverage area is approached more.