GB2160074A - Radio signal transmission and reception system - Google Patents
Radio signal transmission and reception system Download PDFInfo
- Publication number
- GB2160074A GB2160074A GB08414286A GB8414286A GB2160074A GB 2160074 A GB2160074 A GB 2160074A GB 08414286 A GB08414286 A GB 08414286A GB 8414286 A GB8414286 A GB 8414286A GB 2160074 A GB2160074 A GB 2160074A
- Authority
- GB
- United Kingdom
- 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- Withdrawn
Links
- 230000008054 signal transmission Effects 0.000 title claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 19
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
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)
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.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08414286A GB2160074A (en) | 1984-06-05 | 1984-06-05 | Radio signal transmission and reception system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08414286A GB2160074A (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 GB2160074A (en) | 1985-12-11 |
Family
ID=10561937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08414286A Withdrawn GB2160074A (en) | 1984-06-05 | 1984-06-05 | Radio signal transmission and reception system |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2160074A (en) |
Cited By (2)
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)
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 |
-
1984
- 1984-06-05 GB GB08414286A patent/GB2160074A/en not_active Withdrawn
Patent Citations (8)
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)
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 |
---|---|
GB8414286D0 (en) | 1984-07-11 |
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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) |