Antenna arrangement and rail vehicle having a plurality of antennas

Patent metadata

Field	Value
Publication number	US-12046825-B2
Application number	US-201917416617-A
Country	US
Kind code	B2
Filing date	Dec 10, 2019
Priority date	Dec 20, 2018
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

An antenna arrangement for the mobile communication of a rail vehicle and a rail vehicle with an antenna arrangement of the type. The antenna arrangement has at least two transmitting antennas and at least two receiving antennas. The transmitting antennas are spatially grouped in a transmitting group and the receiving antennas are spatially grouped in a receiving group. The distances between the transmitting antennas and between the receiving antennas is smaller than the overall distance between the transmitting group and the receiving group. The antennas can thereby be arranged in a much more space-saving fashion on the vehicles because large distances have to be provided only between the groups, not between the antennas within the groups. Where the space needed is low, interference-free operation of the antennas is thus advantageously possible.

First claim

The invention claimed is:

1. . An antenna arrangement for mobile communication of a rail vehicle, the antenna arrangement comprising:
at least two transmitting antennas only used for transmitting and at least two receiving antennas only used for receiving;
said transmitting antennas being spatially grouped in a transmitting group and said receiving antennas being spatially grouped in a receiving group;
spacing distances between said transmitting antennas being smaller than a required distance without further antennas between said transmitting group and said receiving group; and
spacing distances between said receiving antennas being smaller than the required distance between said transmitting group and said receiving group.

2. The antenna arrangement according to claim 1 , wherein at least a part of said transmitting antennas and a part of said receiving antennas are configured for at least one of a GSM-R standard or an FRMCS standard.

3. The antenna arrangement according to claim 1 , wherein at least one of said transmitting group or said receiving group is a pre-installed module.

4. The antenna arrangement according to claim 1 , wherein the spacing distance between said transmitting antennas and the spacing distance between said receiving antennas amounts to at least a wavelength of a transmitting band or a receiving band, respectively.

5. The antenna arrangement according to claim 1 , wherein:
a decoupling between all of said transmitting antennas of said transmitting group that is caused by an antenna spacing, and
a decoupling between all of said receiving antennas of said receiving group that is caused by the antenna spacing,
is greater than 10 dB.

6. The antenna arrangement according to claim 5 , wherein the decoupling between said transmitting antennas caused by the antenna spacing, and the decoupling between said receiving antennas caused by the antenna spacing is greater than 15 dB.

7. The antenna arrangement according to claim 1 , wherein:
a signal coming from each of said transmitting antennas within a working band of a respective receiver to be assigned to the respective said receiving antenna is smaller than a sensitivity of the receiver reduced by a minimum signal-to-noise ratio of the signal needed for decoding; and
a signal coming from each of said transmitting antennas outside the working band of the respective receiver is smaller than a blocking limit value of the receiver.

8. A rail vehicle, comprising:
an antenna arrangement for mobile communication of the rail vehicle, said antenna arrangement having at least two transmitting antennas only used for transmitting and at least two receiving antennas only used for receiving;
said transmitting antennas being spatially grouped in a transmitting group and said receiving antennas being spatially grouped in a receiving group;
spacing distances between said transmitting antennas being smaller than a spacing distance without further antennas between said transmitting group and said receiving group; and
spacing distances between said receiving antennas being smaller than the distance between said transmitting group and said receiving group.

9. The rail vehicle according to claim 8 , wherein:
a decoupling between all of said transmitting antennas of said transmitting group that is caused by an antenna spacing, and
a decoupling between all of said receiving antennas of said receiving group that is caused by the antenna spacing,
is greater than 10 dB;
a signal coming from each of said transmitting antennas within a working band of a respective receiver that is assigned to the respective said receiving antenna is smaller than a sensitivity of the receiver reduced by a minimum signal-to-noise ratio of the signal needed for decoding; and
a signal coming from each of said transmitting antennas outside the working band of the respective receiver is smaller than a blocking limit value of the receiver.

10. The rail vehicle according to claim 9 , wherein the decoupling between said transmitting antennas caused by the antenna spacing, and the decoupling between said receiving antennas caused by the antenna spacing, is greater than 15 dB.

11. The rail vehicle according to claim 8 , further comprising at least one connected application selected from the group consisting of a computer that is linked into a Train Control System, a train radio device, and a computer for Automatic Train Operation.

12. The rail vehicle according to claim 11 , wherein each of a plurality of applications has a transceiver with,
a transmitting module connected to a transmitting antenna in each case; and
a receiving module connected to a receiving antenna in each case.

13. The rail vehicle according to claim 8 , further comprising a plurality of applications each having a transceiver with:
a transmitting module connected to a transmitting antenna in each case; and
a receiving module connected to a receiving antenna in each case.

14. The rail vehicle according to claim 13 , further comprising a circulator connected between said transceiver and said antenna arrangement, said circulator having a separate antenna input and antenna output and having a combined transmitting and receiving interface for said transceiver.

15. The rail vehicle according to claim 8 , further comprising a router connected to said antenna arrangement.

16. The rail vehicle according to claim 15 , wherein said router is configured for a Future Railway Mobile Communications System.

17. The rail vehicle according to claim 15 , further comprising a circulator connected between said router and said antenna arrangement, said circulator having a separate antenna input and antenna output and having a combined transmitting and receiving interface for said router.

18. The rail vehicle according to claim 8 , wherein said transmitting module and/or said receiving module are disposed at a distance from at least one end of the rail vehicle that amounts to at least one half of a required distance between said transmitting module and said receiving module.

Assignees

• Siemens Mobility GmbH

Inventors

• Kaiser Frank

Classifications

• H04B7/04

  using two or more spaced independent antennas · CPC title

• H01Q1/525

  between emitting and receiving antennas · CPC title

• H01Q1/3275

  mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk · CPC title

• B61L27/70

  Details of trackside communication · CPC title

• B61L2027/202

  using European Train Control System [ETCS] · CPC title