Telecommunication method and system for communicating with multiple terminals in a building through multiple antennas

• US 6,128,471 A
• Filed: 06/19/1996
• Issued: 10/03/2000
• Est. Priority Date: 08/21/1995
• Status: Expired due to Term

• Current Assignee: RPX Clearinghouse LLC (RPX Corporation)
• Original Assignee: Nortel Networks Corporation
• Inventors: Faruque, Seleh, Qi, Yi Hong, Litva, John, Quelch, Peter J.
• Primary Examiner(s): Tsang, Fan
• Assistant Examiner(s): SOBUTKA, PHILIP
• Application Number:
  US08/667,951
• Time in Patent Office: 1,567 Days
• Field of Search: 455/25, 455/561, 455/562, 455/462, 455/463, 455/464, 455/403, 455/500, 455/550, 455/554, 455/517, 455/269, 343/700 MS
• US Class Current: 455/25
• CPC Class Codes: H01Q 9/0407 Substantially flat resonant element parallel to ground plane, e.g. patch antenna dipole H01Q9/285; monopole H01Q9/40

Abstract

Telecommunications system in which an outside antenna is positioned to direct radio signals in a divergent beam towards a predetermined wall surface area of a building. The outside antenna is sufficiently close to the building to require constancy of the radio signals to noise ratio of radio signals transmitted by the outside antenna. The signals transmitted at the building are received by patch antennas located on the wall surface area (e.g. in practice upon windows) for connection of the outside antenna to individual terminal outlets in the building. These terminal outlets are preferably connected by cable to the patch antennas, but the terminal outlets may be radio receivers.

Claims

1. A telecommunications system comprising a first radio signal transmitting and receiving antenna positioned to direct radio signals in a divergent beam towards a predetermined wall surface area of a building with the first antenna sufficiently close to the building to require substantial constancy of the radio signal to noise ratio of radio signals to be transmitted from the first antenna over the predetermined wall surface area, the first antenna being capable of providing substantial constancy of the required radio signal to noise ratio;

and a plurality of second radio signal transmitting and receiving antenna mounted in space locations of the building and within the confines of the divergent beam, each second antenna provided for;

a) transmitting radio signals outwardly from the surface area of the building to the first antenna and selectively for receiving radio signals from the first antenna; and

b) transmitting telecommunications signals to and receiving telecommunications signals from an individual terminal outlet within the building;

wherein at least one of the second antenna comprises a patch antenna, and

wherein the at least one patch antenna comprises a radio signal receiving patch mounted upon an outside surface of the window, a ground plane associated with the patch, and a pick-up cable for receiving signals transmitted by the patch on the other side of the window.

2. A system according to claim 1 wherein the first antenna is positioned sufficiently close to the building to require only 10 dBm of signal transmitting power.

3. A system according to claim 1 wherein at least one of the second antennas is used in conjunction with a demodulator converter for demodulating the radio signal so as to provide a corresponding signal suitable for use by a terminal, and the converter is connected by telecommunications wire to a terminal outlet.

4. A method of telecommunication comprising:

providing a first radio signal transmitting and receiving antenna positioned to direct radio signals in a divergent beam towards a predetermined wall surface area of a building with the first antenna sufficiently close to the building to require substantial constancy of the signal to noise ratio of signals transmitted from the first antenna over the predetermined wall surface area;

providing the required substantial constancy of signal to noise ratio of signals to be transmitted from the first antenna, transmitting radio signals between the first antenna and selectively with one of a plurality of second radio signal transmitting and receiving antennas which are supported in spaced apart locations on the building and within the confines of the divergent beam; and

transmitting signals between the at least one selected second antenna and a terminal individual to the selected second antenna by transmitting the radio signals received at a second antenna to a third antenna and directing radio signals from the third antenna into the building to be received by the individual terminal.

5. A method according to claim 4 wherein the first antenna is operable to transmit radio signals at a maximum power of 10 dBm and is sufficiently close to the building to enable the radio signals to be received by all of the plurality of second antennas.

6. A method according to claim 4 wherein at least one of the second antennas is a patch antenna, the method comprising transmitting the radio signals to the patch antenna.

7. A method according to claim 4 comprising demodulating the radio signals received by the second antenna from the first antenna so as to provide corresponding signals suitable for use by a terminal, and transmitting the corresponding signals to a terminal outlet.

8. A telecommunications system comprising a first radio signal transmitting and receiving antenna positioned to direct radio signals in a divergent beam towards a predetermined wall surface area of a building with the first antenna sufficiently close to the building to require substantial constancy of the radio signal to noise ratio of radio signals to be transmitted from the first antenna over the predetermined wall surface area, the first antenna being capable of providing substantial constancy of the required radio signal to noise ratio;

and a plurality of second radio signal transmitting and receiving antenna mounted in space locations of the building and within the confines of the divergent beam, each second antenna provided for;

a) transmitting radio signals outwardly from the surface area of the building to the first antenna and selectively for receiving radio signals from the first antenna; and

b) transmitting telecommunications signals to and receiving telecommunications signals from an individual terminal outlet within the building,

wherein at least one of the second antennas is connected to a third antenna to transmit a radio signal into the building to be received by an individual terminal.

9. A system according to claim 8 wherein the first antenna is positioned sufficiently close to the building to require only 10 dBm of signal transmitting power.

10. A system according to claim 8 wherein at least one of the second antennas is used in conjunction with a demodulator converter for demodulating the radio signal so as to provide a corresponding signal suitable for use by a terminal, and the converter is connected by telecommunications wire to a terminal outlet.

11. A system according to claim 8 wherein at least one of the second antenna comprises a patch antenna.

12. A system according to claim 11 wherein the patch antenna is mounted upon a window of the building.

13. A system according to claim 11 wherein the at least one patch antenna comprises a radio signal receiving patch mounted upon an outside surface of the window, a ground plane associated with the patch, and a pick-up cable for receiving signals transmitted by the patch on the other side of the window.

14. A telecommunications system comprising a first radio signal transmitting and receiving antenna positioned to direct radio signals in a divergent beam towards a predetermined wall surface area of a building with the first antenna sufficiently close to the building to require substantial constancy of the radio signal to noise ratio of radio signals to be transmitted from the first antenna over the predetermined wall surface area, the first antenna being capable of providing substantial constancy of the required radio signal to noise ratio;

and a plurality of second radio signal transmitting and receiving antenna mounted in space locations of the building and within the confines of the divergent beam, each second antenna provided for;

a) transmitting radio signals outwardly from the surface area of the building to the first antenna and selectively for receiving radio signals from the first antenna; and

b) transmitting telecommunications signals to and receiving telecommunications signals from an individual terminal outlet within the building,

wherein at least one of said second antenna comprises;

a planar radio signal receiving and transmitting patch;

a substrate which has a planar portion, the patch carried upon one side of the planar portion; and

a ground member electrically isolated from the patch and having a main portion disposed opposite to the patch on the other side of the planar portion of the substrate, the ground member having an aperture and the substrate being capable of providing an electromagnetic coupling through the aperture between the patch and the telecommunications signal transmitting means to be located in a position on the side of the ground member remote from the substrate, the ground member extending from its main portion as a peripheral wall around edges of the substrate, the peripheral wall extending through and beyond the plane of the patch to face inwardly of the antenna and across the patch.

15. A system according to claim 14 wherein the first antenna is positioned sufficiently close to the building to require only 10 dBm of signal transmitting power.

16. A system according to claim 14, wherein said at least one second antenna is mounted upon a window of the building.

17. A system according to claim 14 wherein at least one of the second antennas is used in conjunction with a demodulator converter for demodulating the radio signal so as to provide a corresponding signal suitable for use by a terminal, and the converter is connected by telecommunications wire to a terminal outlet.

18. A system according to claim 14, wherein at least one of the second antennas is connected to a third antenna to transmit a radio signal into the building to be received by an individual terminal.

19. The system according to claim 14, wherein the peripheral wall of the at least one second antenna is U-shaped in that the peripheral wall extends beyond the plane of the patch as a first leg of the U-shape and then extends from the first leg and towards the plane of the patch as a second leg of the U-shape, the second leg spaced outwardly from the patch in planes parallel to the plane of the patch.

20. The system according to claim 19, wherein the ground plane of the at least one second antenna extends as an edge strip from the second leg towards the patch and into a position around but spaced from the patch.

21. The system according to claim 20, wherein a plurality of elongate electrically conducting members extend through the substrate of the at least one second antenna in spaced-apart positions around the patch and electrically connect the edge strip to the main portion of the ground member.

22. The system according to claim 21, wherein the electrically conducting members of the at least one second antenna extend through the substrate from a marginal edge region of the edge strip.

23. A method of telecommunication comprising:

providing a first radio signal transmitting and receiving antenna positioned to direct radio signals in a divergent beam towards a predetermined wall surface area of a building with the first antenna sufficiently close to the building to require substantial constancy of the signal to noise ratio of signals transmitted from the first antenna over the predetermined wall surface area;

providing the required substantial constancy of signal to noise ratio of signals to be transmitted from the first antenna, transmitting radio signals between the first antenna and selectively with one of a plurality of second radio signal transmitting and receiving antennas which are supported in spaced apart locations on the building and within the confines of the divergent beam; and

transmitting signals between the selected second antenna and a terminal individual to the selected second antenna,

wherein the selected second antenna comprises;

a planar radio signal receiving and transmitting patch;

a substrate which has a planar portion, the patch carried upon one side of the planar portion; and

a ground member electrically isolated from the patch and having a main portion disposed opposite to the patch on the other side of the planar portion of the substrate, the ground member having an aperture and the substrate being capable of providing an electromagnetic coupling through the aperture between the patch and the telecommunications signal transmitting means to be located in a position on the side of the ground member remote from the substrate, the ground member extending from its main portion as a peripheral wall around edges of the substrate, the peripheral wall extending through and beyond the plane of the patch to face inwardly of the antenna and across the patch.

24. A method according to claim 23 wherein the first antenna is operable to transmit radio signals at a maximum power of 10 dBm and is sufficiently close to the building to enable the radio signals to be received by all of the plurality of second antennas.

25. A method according to claim 23 comprising demodulating the radio signals received by the selected second antenna from the first antenna so as to provide corresponding signals suitable for use by a terminal, and transmitting the corresponding signals to a terminal outlet.

26. A method according to claim 23 comprising transmitting the radio signals from the selected second antenna to a third antenna and directing radio signals from the third antenna into the building to be received by an individual terminal.

27. The method according to claim 23, wherein the peripheral wall of the selected second antenna is U-shaped in that the peripheral wall extends beyond the plane of the patch as a first leg of the U-shape and then extends from the first leg and towards the plane of the patch as a second leg of the U-shape, the second leg spaced outwardly from the patch in planes parallel to the plane of the patch.

28. The method according to claim 27, wherein the ground plane of the selected second antenna extends as an edge strip from the second leg towards the patch and into a position around but spaced from the patch.

29. The method system according to claim 28, wherein a plurality of elongate electrically conducting members extend through the substrate of the selected second antenna in spaced-apart positions around the patch and electrically connect the edge strip to the main portion of the ground member.

30. The method according to claim 29, wherein the electrically conducting members of the selected second antenna extend through the substrate from a marginal edge region of the edge strip.