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Compact field scanning device

A scanning device and a constricted field technology, which is applied to measurement devices, electromagnetic field characteristics, instruments, etc., can solve the problem of large measurement error of the scanning frame, and achieve the effect of improving the detection accuracy and the phase detection accuracy of the constricted field plane wave.

Inactive Publication Date: 2018-11-13
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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Problems solved by technology

[0004] The present invention proposes a compact field scanning device to solve the problem of large measurement errors using the scanning frame of the prior art

Method used

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Embodiment Construction

[0028] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0029] The existing technical means to improve the measurement accuracy of the scanning device used in the on-site calibration of the compact field, one is to rely on its own mechanical precision, and the other is to install a laser compensator on the scanning device. Both technical means have defects. The first one, as the calibration frequency incre...

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Abstract

The invention discloses a compact field scanning device, solving the problem that a scanning rack of the prior art is big in the measurement error. The compact field scanning device includes a scanning rack and a laser collimator, wherein the scanning rack includes an orientation adjusting mechanism, a pitch adjusting mechanism, a horizontal scanning rack, a vertical scanning rack, and a compensation mechanism; the laser collimator includes a transmitting device and a receiving device; the transmitting device is located at a fixed point above the ground for generating a laser beam parallel toa field plane; the receiving device is fixed at an end portion of a motion tube for receiving the laser beam; after receiving the laser beam, the receiving device detects an offset; and a control unitreceives the offset, and controls the compensation mechanism to reduce the offset. The compact field scanning device can improve the compact field plane wave phase detection accuracy, and can avoid the defects of manual operation, low efficiency, low speed and the like.

Description

technical field [0001] The present application relates to the field of electromagnetic field measurement, in particular to a scanning device for on-site calibration for plane wave amplitude and phase characteristics in the quiet zone of a tight field. Background technique [0002] Due to its high measurement accuracy and convenient use, the compact field has become a necessary equipment for high-precision measurement of radar target RCS characteristics, seeker tracking, stealth material performance, high-performance radar antenna and radome characteristics, etc. The compact field adopts a precise reflective surface, which can convert the spherical wave generated by the point source into a plane wave at a short distance. The core index for evaluating the performance of the plane wave in the test area of ​​the compact field is the amplitude and phase characteristics of the plane wave in the quiet zone, especially the phase characteristic. For the measurement of phase roughness...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/08
CPCG01R29/0871
Inventor 马永光何鑫王琨飞吴翔任涛
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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