A Radio Astronomical Telescope Combining Large Aperture Spherical Reflector and Phased Array Feed

A technique of astronomical telescope and spherical reflection, applied in the direction of antennas, electrical components, etc.

Active Publication Date: 2022-07-08
NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The real-time control and long-term reliable operation of more than 2,000 actuators, and the safe operation of the main cable net of the FAST reflective surface in active deformation are very challenging

Method used

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  • A Radio Astronomical Telescope Combining Large Aperture Spherical Reflector and Phased Array Feed
  • A Radio Astronomical Telescope Combining Large Aperture Spherical Reflector and Phased Array Feed
  • A Radio Astronomical Telescope Combining Large Aperture Spherical Reflector and Phased Array Feed

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Experimental program
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Embodiment Construction

[0036] The present invention will be further described in detail below with reference to the accompanying drawings.

[0037] The specific implementation of the radio telescope combined with the spherical reflector and the phased array feed (PAF) mainly includes the following aspects:

[0038] Build a spherical reflector. Select a suitable karst depression as the telescope construction site, and carry out necessary earthwork excavation and backfilling. Build the main cable net and the lower cable of the telescope, and adjust the nodes of the cable net to the designed spherical surface. Lay a single-layer spherical reflective panel on the cable net, and make fine adjustments to the main reflective surface.

[0039] Feed support system. Build several towers and feed cabin cable drive systems around the reflective surface. A feed support platform with a two-axis rotation adjustment mechanism developed by the FAST project is used.

[0040] Phased Array Feed (PAF) Design. Acco...

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Abstract

The invention discloses a radio astronomical telescope combining a large-diameter spherical reflection surface and a phase array feed source, which is characterized by comprising a spherical reflection surface for converging incident plane waves through reflection; On the system, it is used to receive the electromagnetic waves gathered by the spherical reflective surface and send the received signal to the data processing terminal; the data processing terminal is used for the calibration of the phased array feed and the calculation and data storage required for data processing of the received signal. In the present invention, the spherical reflection surface is selected as the neutral surface of FAST, and the PAF is selected as the size of about 10 meters * 10 meters, composed of 7225 feed units, the illumination cone loss of each feed unit at 56.4 degrees is 4.4dB, and the unit spacing is 12 At centimeters, the resulting efficiency is higher than that of FAST using a single beam. And the above scheme can obtain a field of view of 2*2 square degrees, which is larger than the current instantaneous field of view of FAST.

Description

technical field [0001] The invention belongs to the technical field of radio astronomical telescopes, and relates to a radio astronomical telescope, in particular to a radio astronomical telescope that achieves high sensitivity and a large field of view by combining a large-diameter spherical reflecting surface and a phase array feed source. Background technique [0002] Since the birth of radio astronomy in the 1930s, radio astronomical telescopes have been making continuous breakthroughs in the performance of sensitivity and resolution. In terms of resolution, the very long baseline interferometry (Very LongBaseline Interferometry-VLBI) of radio astronomy has the highest resolution among all kinds of astronomical observations. Its longest baseline has exceeded the diameter of the earth due to the addition of space antennas. In terms of sensitivity, the single-antenna telescope with the largest aperture at present is my country's Five-hundred-meter Aperture Spherical Radio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/16H01Q19/12
CPCH01Q15/16H01Q19/12
Inventor 王君朱岩金乘进彭勃
Owner NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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