Antenna array

• US 8,836,578 B2
• Filed: 05/28/2013
• Issued: 09/16/2014
• Est. Priority Date: 09/26/2008
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Kathrein-Werke KG. (Kathrein SE)
• Inventors: Kenington, Peter
• Primary Examiner(s): McGue, Frank J
• Application Number:
  US13/903,067
• Publication Number:
  US 20130265195A1
• Time in Patent Office: 476 Days
• Field of Search: 372/372
• US Class Current: 342/372
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• CPC Class Codes: H01Q 21/061 Two dimensional planar arrays
• CPC Class Codes: H01Q 3/26 varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture H01Q3/12, H01Q3/22, H01Q3/24 take precedence

Abstract

The present application relates to an antenna array that comprises a plurality of antenna elements and a plurality of amplifiers feeding the plurality of antenna elements. A first group of the plurality of antenna elements is arranged in a first column and a second group of the antenna elements is arranged in a second column. A first amplifier of the plurality of amplifiers has a first power rating and a second amplifier of the plurality of amplifiers has a second power rating, the first power rating being different than the second power rating. The first column is arranged symmetrical to the second column about an axis. Amplifiers feeding the first column have a substantially similar power rating to corresponding amplifiers feeding the second column.

Claims

1. An antenna array comprising a plurality of antenna elements and a plurality of amplifiers having power ratings and feeding the plurality of antenna elements, wherein a first group of the plurality of antenna elements is arranged in a rectilinear planar array of a first column of the antenna array and a second group of the plurality of antenna elements is arranged in a rectilinear planar array of a second column of the antenna array, wherein a first amplifier of the plurality of amplifiers has a first power rating and a second amplifier of the plurality of amplifiers has a second power rating, the first power rating being different than the second power rating, wherein the first column of the plurality of antenna elements is arranged symmetrical to the second column of the plurality of antenna elements about a rectilinear parallel axis, and wherein the amplifiers feeding the first column of the plurality of antenna elements have a substantially similar power rating to the corresponding amplifiers feeding the parallel second column of the symmetrically corresponding one of the plurality of antenna elements, the antenna array further comprising a plurality of high power transceivers, the high power transceivers comprising one antenna element of said plurality of antenna elements and one amplifier of said plurality of amplifiers, wherein the amplifiers feeding the first column of the plurality of antenna elements and the amplifiers feeding the second column of the plurality of antenna elements are digitally linearized to enable tracking in amplitude and phase of the high power transceivers.

2. The antenna array of claim 1, wherein the power ratings of the amplifiers are chosen to form a power distribution profile over the antenna array.

3. The antenna array of claim 1, wherein the antenna array comprises an edge and wherein the power rating of the amplifiers tapers towards the edge of the antenna array.

4. The antenna array of claim 1, wherein the plurality of amplifiers is subdivided into two or more subsets of amplifiers, the power ratings of the amplifiers within one of the two or more subsets being substantially equal.

5. The antenna array of claim 1, wherein the first amplifier comprises two or more identical elementary amplifying devices having a first elementary power rating, and the second amplifier comprises at least one elementary amplifying device having a second elementary power rating.

6. The antenna array of claim 1, wherein said first amplifier and said second amplifier use identical device technology.

7. The antenna array of claim 6, wherein the identical device technology is selected from the group consisting of lateral double-diffused MOSFET technology, GaAs MESFET technology, and high electron mobility transistor technology.

8. The antenna array of claim 1, further comprising a compensator arranged to determine and compensate for at least one of amplitude, phase, delay and/or linearity deviations of at least one of the plurality of high power transceivers.

9. The antenna array of claim 8, comprising a plurality of said compensators, each one of said plurality of compensators being associated to one of the plurality of high power transceivers.

10. The antenna array of claim 9, wherein the plurality of compensators is arranged to determine at least one of relative amplitude, phase and/or linearity deviations relative to an aggregate value for the amplitude, phase and/or linearity.

11. The antenna array of claim 8, wherein the compensator is arranged to adjust at least one of an amplitude setting, a phase setting, a delay setting or a linearity setting of a corresponding one of the plurality of high power transceivers so as to reduce the amplitude, phase and/or linearity deviation of the corresponding one of the plurality of high power transceivers.

12. A base transceiver station comprising the antenna array comprising a plurality of antenna elements and a plurality of amplifiers having power ratings and feeding the plurality of antenna elements, wherein a first group of the plurality of antenna elements is arranged in a rectilinear planar array of a first column of the antenna array and a second group of the plurality of antenna elements is arranged in a rectilinear planar array of a second column of the antenna array, wherein a first amplifier of the plurality of amplifiers has a first power rating and a second amplifier of the plurality of amplifiers has a second power rating, the first power rating being different than the second power rating, wherein the first column of the plurality of rectilinear planar antenna elements is arranged symmetrical to the second column of the plurality of antenna elements about a rectilinear parallel axis, and wherein amplifiers feeding the first column of the plurality of antenna elements have a substantially similar power rating to corresponding amplifiers feeding the parallel second column of the symmetrically corresponding one of the plurality of antenna elements, the antenna array further comprising a plurality of high power transceivers, the high power transceivers comprising an antenna element of said plurality of rectilinear planar antenna elements and an amplifier of said plurality of amplifiers, wherein the amplifiers feeding the first column of the plurality of antenna elements and the amplifiers feeding the second column of the plurality of antenna elements are digitally linearized to enable tracking in amplitude and phase of the high power transceivers.

13. The base transceiver station of claim 12, wherein the antenna array further comprises a plurality of high power transceivers, each one of the high power transceivers comprising an antenna element of said plurality of antenna elements and an amplifier of said plurality of amplifiers, and wherein at least one of the plurality of high power transceivers is arranged to receive a baseband signal to be transmitted and comprises a modulator for modulating the baseband signal and an up-converter for performing a frequency translation of said base band signal.

14. A computer program product embodied on a non-transitory computer-readable medium and comprising executable instructions for the manufacture of the antenna array comprising a plurality of antenna elements and a plurality of amplifiers having power ratings and feeding the plurality of antenna elements, wherein a first group of the plurality of antenna elements is arranged in a rectilinear planar array of a first column of the antenna array and a second group of the plurality of antenna elements is arranged in a rectilinear planar array of a second column of the antenna array, wherein a first amplifier of the plurality of amplifiers has a first power rating and a second amplifier of the plurality of amplifiers has a second power rating, the first power rating being different than the second power rating, wherein the first column of the plurality of antenna elements is arranged symmetrical to the second column of the plurality of antenna elements about a rectilinear parallel axis, and wherein amplifiers feeding the first column of the plurality of antenna elements have a substantially similar power rating to corresponding amplifiers feeding the parallel second column of the symmetrically corresponding one of the plurality antenna elements, the antenna array further comprising a plurality of high power transceivers, the high power transceivers comprising one antenna element of said plurality of antenna elements and one amplifier of said plurality of amplifiers, wherein the amplifiers feeding the first column of the plurality of antenna elements and the amplifiers feeding the second column of the plurality of antenna elements are digitally linearized to enable tracking in amplitude and phase of the high power transceivers.