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A Beam Center Calibration Method for Spaceborne Antenna Based on Pattern Matching

A technology of beam center and spaceborne antenna, which is applied in the field of beam center calibration of spaceborne antenna based on pattern matching, and can solve problems such as failure to reach

Active Publication Date: 2021-03-26
XIAN INSTITUE OF SPACE RADIO TECH
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  • Description
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  • Application Information

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None of the existing technologies can meet the above requirements

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  • A Beam Center Calibration Method for Spaceborne Antenna Based on Pattern Matching
  • A Beam Center Calibration Method for Spaceborne Antenna Based on Pattern Matching
  • A Beam Center Calibration Method for Spaceborne Antenna Based on Pattern Matching

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Embodiment Construction

[0049] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0050] This embodiment proposes a method for estimating the beam center based on pattern matching, which matches the ground discretely sampled power point to ...

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Abstract

The invention discloses a method for calibrating the beam center of a space-borne antenna based on pattern matching. The method comprises the following steps: (1) arranging N ground calibrator arrays; (2) obtaining N ground calibrator Received power; (3) Judging by satellite-ground geometry, whether the main lobe covers the area at this time; (4) Align the received power of N ground scalers to form a spatial sampling of the power of a specific pulse, and at the same time Compensate the space attenuation caused by the different distances of different calibration stations (5) Determine whether the beam points of the N ground scalers are consistent (6) Estimate the beam pointing, and obtain the cost function at the same time, judge whether the matching result is correct according to the cost function, if correct Then output the cost value, otherwise go to step (1). The present invention solves the high-precision requirement of the beam center calibration of the new system ring scan radar, and innovatively proposes a beam center estimation method based on the optimal matching of the pattern under the background of no reference method.

Description

technical field [0001] The invention belongs to the technical field of space-borne fixed-plane antennas, and in particular relates to a method for calibrating the beam center of a space-borne antenna based on pattern matching. Background technique [0002] Taking a demonstration satellite as the background, the on-orbit calibration of the antenna beam center of the solid surface reflector is carried out. At present, the existing spaceborne antenna calibration is mainly based on the measurement of the pattern, and the calibration accuracy of the antenna beam pointing is generally low, and the satellite pointing will change with the rotation angle. The existing methods are difficult to meet the needs of the satellite pointing calibration . In addition, satellites not only require extremely high pointing calibration accuracy, but also require a single pulse to realize the estimation of the beam center. Existing technologies all fall short of above-mentioned requirement. Con...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40H04B7/185
CPCG01S7/4026G01S7/403G01S7/4034H04B7/18519
Inventor 解虎李诗润谭小敏党红杏张选民高飞闫伟
Owner XIAN INSTITUE OF SPACE RADIO TECH