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Systems and methods for phased array passband calibration

A phased array antenna, phased array technology, used in radio transmission systems, baseband systems, transmission systems, etc.

Pending Publication Date: 2021-01-19
THE BOEING CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although calibration is relatively straightforward for some single-channel and single-RF-path arrangements, electrically steerable phased array antennas present challenges

Method used

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  • Systems and methods for phased array passband calibration
  • Systems and methods for phased array passband calibration
  • Systems and methods for phased array passband calibration

Examples

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Embodiment approach

[0167] Item 1. A wireless system employing phased array passband calibration comprising:

[0168] phased array feeder (104);

[0169] an antenna array (106) coupled to the phased array feed, wherein the antenna array and the phased array feed together form at least a portion of the phased array antenna (102);

[0170] equalization filters (122, 124) coupled to the phased array feed;

[0171] a calibration probe (112) configured to couple with the antenna array to transmit radio frequency (RF) energy;

[0172] a database (134) of probe-to-far-field (FF) conversions, with a probe-to-FF conversion for each of a plurality of angles of incidence;

[0173] a calibration assembly (130) operable to:

[0174] receiving (718) calibration probe measurements for a plurality of frequencies; and

[0175] determining (722) a calculated phased array passband response for the first angle of incidence based at least on the calibration probe measurements and the probe-to-FF conversion for the ...

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Abstract

Systems and methods are provided for phased array passband calibration, which permits repeated calibration of the antenna system in the field without a moving far field sensor. An example includes anequalization filter coupled to a phased array feed; a calibration probe disposed to couple with an antenna array to transfer radio frequency (RF) energy; a database of probe-to-far-field (FF) transforms having a probe-to-FF transform for each of a plurality of incidence angles; a calibration component operable to: receive calibration probe measurements for a plurality of frequencies; and determinea calculated phased array passband response for at least a first incidence angle, based at least on the calibration probe measurements and a probe-to-FF transform for the first incidence angle; and afilter generation component operable to generate a tuning configuration for the equalization filter, based at least on the calculated phased array passband response.

Description

technical field [0001] The present disclosure relates to phased array passband calibration, and more particularly, to antenna systems that allow repeated calibration without moving far-field sensors. [0002] Background of the invention [0003] Radio frequency (RF) communications and radar systems are generally susceptible to at least some level of frequency-dependent distortion that degrades the waveform, motivating the use of calibration procedures that characterize and compensate for the effects of such distortion. In general, it is preferable to limit the distortion to within the operating frequency band of the system, which increases both hardware cost and the potential need for ongoing characterization cycles when aging effects induce distortion. A common calibration method involves characterizing the passband response of the hardware and then generating an equalization filter with a passband response that is the inverse of the hardware's passband response. [0004] W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/12H04B7/0408
CPCH04B17/12H04B7/0408H01Q3/267H04L25/03343H04L25/03891H04L25/03159H04B17/14
Inventor 布里安·D·科尔迪巴德·阿克比克龙·Y·李杰弗里·J·卡尔瓦尼亚尼古拉·A·安格洛夫
Owner THE BOEING CO
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