ANTENNA ARRANGEMENT FOR TRANSMITTING REFERENCE SIGNALS

• US 20190319684A1
• Filed: 04/12/2018
• Published: 10/17/2019
• Est. Priority Date: 04/12/2018
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: ATHLEY, Fredrik, PETERSSON, Sven, NILSSON, Andreas
• Granted Patent: US 10,432,273 B1
• Time in Patent Office: Days
• CPC Class Codes: H01Q 21/0025 Modular arrays
• CPC Class Codes: H01Q 21/061 Two dimensional planar arrays
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 25/001 Crossed polarisation dual antennas orthomode horns H01Q13/0258; cross-polarised rear feeds H01Q19/136; orthomode transducers H01P1/161
• CPC Class Codes: H01Q 25/02 providing sum and difference patterns H01Q25/04 takes precedence
• CPC Class Codes: H01Q 3/36 with variable phase-shifters
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04B 7/0469 taking special antenna structures, e.g. cross polarized antennas into account

Abstract

There is provided an antenna arrangement. The antenna arrangement comprises a first antenna array and a second antenna array. Each antenna array comprises antenna elements of a first polarization and antenna elements of a second polarization. The two antenna arrays are arranged to collectively be fed four signals, such that the antenna elements of each polarization at each antenna array is fed a respective one out of the four signals. The signal as fed to the antenna elements of the second polarization of the second antenna array is phase shifted 180° with respect to at least one of the other signals as fed to the other antenna elements.

Claims

1. An antenna arrangement, the antenna arrangement comprising:

a first antenna array; and

a second antenna array, wherein

the first antenna array comprises antenna elements of a first polarization and antenna elements of a second polarization,

the second antenna array comprises antenna elements of the first polarization and antenna elements of the second polarization,

the two antenna arrays are arranged to collectively be fed four signals, such that the antenna elements of each polarization at each antenna array is fed a respective one out of the four signals, and

the signal as fed to the antenna elements of the second polarization of the second antenna array is phase shifted 180°

with respect to at least one of the other signals as fed to the other antenna elements.

2. The antenna arrangement of claim 1, wherein the signal as fed to the antenna elements of the second polarization of the second antenna array is phase shifted 180°

with respect to at least the signal as fed to the antenna elements of the first polarization of the first antenna array.

3. The antenna arrangement of claim 2, wherein the two signals as fed to the first antenna array originate from a first common signal s1, and wherein the two signals as fed to the second antenna array originate from a second common signal s2.

4. The antenna arrangement of claim 3, wherein the first common signal s1 represents a first layer signal and wherein the second common signal s2 represents a second layer signal, or wherein the first common signal s1 and the second common signal s2 represent two ports of a reference signal.

5. The antenna arrangement of claim 3, wherein the signal as fed to the antenna elements of the second polarization of the first antenna array is phase shifted α

°

with respect to the signal as fed to the antenna elements of the first polarization of the first antenna array.

6. The antenna arrangement of claim 3, wherein the signal as fed to the antenna elements of the first polarization of the second antenna array is phase shifted −

α

°

with respect to the signal as fed to the antenna elements of the first polarization of the first antenna array.

7. The antenna arrangement of claim 5, wherein α

has a channel dependent value.

8. The antenna arrangement of claim 3, wherein the first common signal s1 and the second common signal s2 originate from one single common signal s.

9. The antenna arrangement of claim 8, wherein the single common signal s represents a single layer signal or a single-port reference signal.

10. The antenna arrangement of claim 1, wherein the signal as fed to the antenna elements of the second polarization of the second antenna array is phase shifted 180°

with respect to at least the signal as fed to the antenna elements of the first polarization of the second antenna array.

11. The antenna arrangement of claim 10, wherein the signal as fed to the antenna elements of the second polarization of the first antenna array is phase shifted α

°

with respect to the signal as fed to the antenna elements of the first polarization of the second antenna array.

12. The antenna arrangement of claim 10, wherein the signal as fed to the antenna elements of the first polarization of the first antenna array is phase shifted −

α

°

with respect to the signal as fed to the antenna elements of the first polarization of the second antenna array.

13. The antenna arrangement of claim 11, wherein α

has a channel dependent value.

14. The antenna arrangement of claim 10, wherein the signal as fed to the antenna elements of the first polarization of the second antenna array and the signal as fed to the antenna elements of the second polarization of the first antenna array originate from a first common signal s1.

15. The antenna arrangement of claim 10, wherein the signal as fed to the antenna elements of the second polarization of the second antenna array and the signal as fed to the antenna elements of the first polarization of the first antenna array originate from a second common signal s2.

16. The antenna arrangement of claim 15, wherein the first common signal s1 represents a first layer signal, and wherein the second common signal s2 represents a second layer signal, or wherein the first common signal s1 and the second common signal s2 represent two ports of a reference signal.

17. The antenna arrangement of claim 1, further comprising:

an analog beamforming network, and wherein the four signals are fed to the antenna elements from the analog beamforming network.

18. The antenna arrangement of claim 1, wherein the first polarization and the second polarization are mutually orthogonal.

19. A radio transceiver device comprising the antenna arrangement of claim 1.

20. A method for transmitting signals, the method being performed by a radio transceiver device, the method comprising:

transmitting signals by feeding the signals through the antenna arrangement of claim 1.

21. A computer program product comprising a non-transitory computer readable medium storing a computer program for transmitting signals, the computer program comprising computer code which, when run on processing circuitry of a radio transceiver device, causes the radio transceiver device to perform the method according to claim 20.