GB2160074A - Radio signal transmission and reception system - Google Patents

Radio signal transmission and reception system Download PDF

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Publication number
GB2160074A
GB2160074A GB8414286A GB8414286A GB2160074A GB 2160074 A GB2160074 A GB 2160074A GB 8414286 A GB8414286 A GB 8414286A GB 8414286 A GB8414286 A GB 8414286A GB 2160074 A GB2160074 A GB 2160074A
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GB
Grant status
Application
Patent type
Prior art keywords
tunnel
radio signal
signals
reception
signal transmission
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB8414286A
Other versions
GB8414286D0 (en )
Inventor
Allan Peter Glover
Original Assignee
Allan Peter Glover
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B5/00Near-field transmission systems, e.g. inductive loop type
    • H04B5/0025Near field system adaptations
    • H04B5/0037Near field system adaptations for power transfer

Abstract

A radio signal transmission and reception system comprises radio signal transmission apparatus (4) permanently associated with a tunnel (3), and an aerial (5) arranged within the tunnel (3), the arrangement being such that in use the transmission apparatus (4) supplies to the aerial (5) low power signals which are capable of reception by radio receivers (2) within the tunnel (3) but which do not cause any unacceptable interference with radio signal transmission and reception outside the tunnel (3). <IMAGE>

Description

SPECIFICATION Radio signal transmission and reception system This invention relates to a radio signal transmission and reception system.

When an automobile enters a tunnel of any appreciable length any radio receiver in the automobile is generally unable to continue to receive, at least in an intelligible manner, radio signals which can be received outside the tunnel and which are being transmitted from a remote transmitting station, for example generally available radio signals from BBC or other transmitters According to this invention a radio signal transmission and reception system comprises radio signal transmission apparatus permanently associated with a tunnel, and an aerial arranged within the tunnel, the arrangement being such that in use the transmission apparatus supplies to the aerial low power signals which are capable of reception by radio signal receivers within the tunnel but which do not cause any unacceptable interference with radio signal transmission and reception outside the tunnel.

Thus, with the system of this invention radio signal receivers entering a tunnel, for example receivers in automobiled, can continue to function.

The transmission apparatus can simply repeat signals available outside the tunnel such that reception by a receiver entering the tunnel will not be interrupted while the receiver passes through the tunnel.

Otherwise the transmission apparatus can supply original signals, preferably on a wavelength or wavelengths in use for transmission and reception outside the tunnel, such that while in the tunnel a receiver will receive original signals temporarily replacing signals being received outside the tunnel.

Such original signals can convey advertisements.

The accompanying drawing diagrammatically illustrates a system according to this invention.

The drawing shows an automobile 1 having a radio signal receiver with an aerial 2 therein; passing through a tunnel 3.

A radio signal transmission apparatus 4 is mounted adjacent one end of the tunnel 3 and feeds an aerial 5 which extends substantially the length of the tunnel 3.

The apparatus 4 feeds low power radio signals to the aerial 5, which signals are received by the receiver in the automobile 1 and replace any signals being received by the receiver before the automobile entered the tunnel 3.

The signals from the apparatus 4, and the aerial 5, are such that unacceptable interferdnce with radio signal transmission and reception outside the tunnel 3 is substantially avoided.

1. A radio signal transmission and reception system comprising radio signal transmission apparatus permanently associated with a tunnel, and an aerial arranged within the tunnel, the arrangement being such that in use the transmission apparatus supplies to the aerial low power signals which are capable of reception by radio signal receivers within the tunnel but which do not cause any unacceptable interference with radio signal transmission and reception outside the tunnel.

2. A system as claimed in Claim 1, in which the transmission apparatus repeats signals available outside the tunnel.

3. A system as claimed in Claim 1, in which the transmission apparatus supplies original signals.

4. A system as claimed in Claim 3, in which the original signals are on a wavelength or wavelengths in use for transmission and reception outside the tunnel.

5. A system as claimed in Claim 3 or Claim 4, in which the original signals convey advertisements.

6. A radio signal transmission and reception system substantially as hereinbefore described with reference to the drawing.

7. A system as claimed in any preceding claim, including a radio signal receiver mounted in an automobile and tuned to receive signals transmitted by the transmission apparatus.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Radio signal transmission and reception system This invention relates to a radio signal transmission and reception system. When an automobile enters a tunnel of any appreciable length any radio receiver in the automobile is generally unable to continue to receive, at least in an intelligible manner, radio signals which can be received outside the tunnel and which are being transmitted from a remote transmitting station, for example generally available radio signals from BBC or other transmitters According to this invention a radio signal transmission and reception system comprises radio signal transmission apparatus permanently associated with a tunnel, and an aerial arranged within the tunnel, the arrangement being such that in use the transmission apparatus supplies to the aerial low power signals which are capable of reception by radio signal receivers within the tunnel but which do not cause any unacceptable interference with radio signal transmission and reception outside the tunnel. Thus, with the system of this invention radio signal receivers entering a tunnel, for example receivers in automobiled, can continue to function. The transmission apparatus can simply repeat signals available outside the tunnel such that reception by a receiver entering the tunnel will not be interrupted while the receiver passes through the tunnel. Otherwise the transmission apparatus can supply original signals, preferably on a wavelength or wavelengths in use for transmission and reception outside the tunnel, such that while in the tunnel a receiver will receive original signals temporarily replacing signals being received outside the tunnel. Such original signals can convey advertisements. The accompanying drawing diagrammatically illustrates a system according to this invention. The drawing shows an automobile 1 having a radio signal receiver with an aerial 2 therein; passing through a tunnel 3. A radio signal transmission apparatus 4 is mounted adjacent one end of the tunnel 3 and feeds an aerial 5 which extends substantially the length of the tunnel 3. The apparatus 4 feeds low power radio signals to the aerial 5, which signals are received by the receiver in the automobile 1 and replace any signals being received by the receiver before the automobile entered the tunnel 3. The signals from the apparatus 4, and the aerial 5, are such that unacceptable interferdnce with radio signal transmission and reception outside the tunnel 3 is substantially avoided. CLAIMS
1. A radio signal transmission and reception system comprising radio signal transmission apparatus permanently associated with a tunnel, and an aerial arranged within the tunnel, the arrangement being such that in use the transmission apparatus supplies to the aerial low power signals which are capable of reception by radio signal receivers within the tunnel but which do not cause any unacceptable interference with radio signal transmission and reception outside the tunnel.
2. A system as claimed in Claim 1, in which the transmission apparatus repeats signals available outside the tunnel.
3. A system as claimed in Claim 1, in which the transmission apparatus supplies original signals.
4. A system as claimed in Claim 3, in which the original signals are on a wavelength or wavelengths in use for transmission and reception outside the tunnel.
5. A system as claimed in Claim 3 or Claim 4, in which the original signals convey advertisements.
6. A radio signal transmission and reception system substantially as hereinbefore described with reference to the drawing.
7. A system as claimed in any preceding claim, including a radio signal receiver mounted in an automobile and tuned to receive signals transmitted by the transmission apparatus.
GB8414286A 1984-06-05 1984-06-05 Radio signal transmission and reception system Withdrawn GB8414286D0 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8414286A GB8414286D0 (en) 1984-06-05 1984-06-05 Radio signal transmission and reception system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8414286A GB8414286D0 (en) 1984-06-05 1984-06-05 Radio signal transmission and reception system

Publications (2)

Publication Number Publication Date
GB8414286D0 GB8414286D0 (en) 1984-07-11
GB2160074A true true GB2160074A (en) 1985-12-11

Family

ID=10561937

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8414286A Withdrawn GB8414286D0 (en) 1984-06-05 1984-06-05 Radio signal transmission and reception system

Country Status (1)

Country Link
GB (1) GB8414286D0 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5230085A (en) * 1991-04-05 1993-07-20 E-Systems, Inc. Method and apparatus for wireless electromagnetic communication within a contained electromagnetic field
US5404570A (en) * 1992-11-23 1995-04-04 Telefonaktiebolaget L M Ericsson Radio coverage in closed environments

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB422383A (en) * 1934-04-12 1935-01-10 Werner Daya Improved means for avoiding interference in radio communication
GB1235888A (en) * 1967-08-17 1971-06-16 Sumitomo Electric Industries Improvements in or relating to radio transmission systems for communication with moving bodies
GB1371291A (en) * 1972-05-09 1974-10-23 Coal Industry Patents Ltd Radio frequency communication systems
GB1485156A (en) * 1974-08-07 1977-09-08 Coal Ind Radiating line telecommunication systems
GB1491468A (en) * 1974-08-07 1977-11-09 Coal Ind Radiating line telecommunication systems
EP0004003A2 (en) * 1978-03-11 1979-09-19 Licentia Patent-Verwaltungs-GmbH Information transmission system
EP0079324A2 (en) * 1981-11-06 1983-05-18 Siemens Aktiengesellschaft Österreich Wide band tunnel radio arrangement
GB2126845A (en) * 1982-07-27 1984-03-28 Arf Products Radio communication systems for underground mines

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB422383A (en) * 1934-04-12 1935-01-10 Werner Daya Improved means for avoiding interference in radio communication
GB1235888A (en) * 1967-08-17 1971-06-16 Sumitomo Electric Industries Improvements in or relating to radio transmission systems for communication with moving bodies
GB1371291A (en) * 1972-05-09 1974-10-23 Coal Industry Patents Ltd Radio frequency communication systems
GB1485156A (en) * 1974-08-07 1977-09-08 Coal Ind Radiating line telecommunication systems
GB1491468A (en) * 1974-08-07 1977-11-09 Coal Ind Radiating line telecommunication systems
EP0004003A2 (en) * 1978-03-11 1979-09-19 Licentia Patent-Verwaltungs-GmbH Information transmission system
EP0079324A2 (en) * 1981-11-06 1983-05-18 Siemens Aktiengesellschaft Österreich Wide band tunnel radio arrangement
GB2126845A (en) * 1982-07-27 1984-03-28 Arf Products Radio communication systems for underground mines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5230085A (en) * 1991-04-05 1993-07-20 E-Systems, Inc. Method and apparatus for wireless electromagnetic communication within a contained electromagnetic field
US5404570A (en) * 1992-11-23 1995-04-04 Telefonaktiebolaget L M Ericsson Radio coverage in closed environments
US5603080A (en) * 1992-11-23 1997-02-11 Telefonaktiebolaget Lm Ericsson Radio coverage in closed environments

Also Published As

Publication number Publication date Type
GB8414286D0 (en) 1984-07-11 grant

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)