Multiple transmission channel wireless communication systems

• US 20050266902A1
• Filed: 07/08/2003
• Published: 12/01/2005
• Est. Priority Date: 07/11/2002
• Status: Abandoned Application

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Boyle, Kevin R., Khatri, Bhavin S.
• Application Number:
  US10/520,309
• Publication Number:
  US 20050266902A1
• Time in Patent Office: Days
• US Class Current: 455/575.700
• CPC Class Codes: H01Q 21/00 Antenna arrays or systems arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system H01Q3/00
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity

Abstract

A multiple transmission channel wireless communication system such as MIMO system, comprises a transmitting station and at least one receiving station, at least one of said stations having an antenna system comprising a plurality of spaced apart antenna elements (16A, 16B), each antenna element comprising a sub-array of at least 2 antennas (20A, 20B) separated by less than half the wavelength of the frequency of interest The antennas of each of the antenna elements may be controllable to give directional propagation or reception.

Claims

1. A multiple transmission channel wireless communication system comprising a transmitting station (10) and at least one receiving station (12), at least one of said stations having an antenna system (14) comprising a plurality of spaced apart antenna elements (16A,B), each antenna element comprising a sub-array of at least 2 antennas (20A,B) separated by less than λ

/2 of the frequency of interest.

2. A system as claimed in claim 1, characterised in that the antennas (20A,B) of a sub-array are coupled to an RF network (18A,B) for processing signals received by the antennas.

3. A system as claimed in claim 1 or 2, characterised in that the antennas (20A,B) of each sub-array are spaced apart by less than λ

/4.

4. A system as claimed in claim 1, characterised in that a hybrid coupler (42A,B) couples together the antennas of each sub-array.

5. A system as claimed in claim 1 or 2, characterised in that the antennas (20A,B) of a sub-array are switchable to achieve directional propagation or reception.

6. A system as claimed in claim 1, characterised in that the antenna systems (14) form multiple orthogonal antenna beam patterns.

7. A system as claimed in claim 1 or 2, characterised in that the sub-arrays comprise antennas (20) arranged to give orthogonal polarisation.

8. An antenna system for use in a multiple transmission channel wireless communication system, the antenna system comprising a plurality of spaced apart antenna elements (16A,B), each antenna element comprising a sub-array of at least 2 antennas (20A,B) separated by less than λ

/2 of the frequency of interest.

9. An antenna system as claimed in claim 8, characterised in that the antennas (20A,B) of a sub-array are coupled to an RF network (18A,B) for processing signals received by the antennas.

10. An antenna system as claimed in claim 8 or 9, characterised in that the antennas (20A,B) of each sub-array are spaced apart by less than λ

/4.

11. An antenna system as claimed in claim 8, characterised in that a hybrid coupler (42A,B) couples together the antennas of each subarray.

12. An antenna system as claimed in claim 8 or 9, characterised in is that the antennas (20A,B) of a sub-array are switchable to achieve directional propagation or reception.

13. An antenna system as claimed in claim 8 or 9, characterised in that the antenna systems (14) form multiple orthogonal antenna beam patterns.

14. An antenna system as claimed in claim 8 or 9, characterised in that the sub-arrays comprise antennas (20) arranged to give orthogonal polarisation.