A Cylinder Field Quiet Zone Amplitude and Phase Detection System
A detection system and cylindrical field technology, applied in the direction of electromagnetic field characteristics, etc., can solve the problems of complex and high cost of mechanical scanning devices, difficult to have versatility, etc.
Active Publication Date: 2021-02-12
BEIHANG UNIV
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Problems solved by technology
This kind of mechanical scanning device is complex and expensive, especially in large-scale sites. At the same time, the arc scanning device is closely related to the layout of the evaluated site, so it is difficult to be universal
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[0042] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0043] like image 3 (a) and image 3 As shown in (b), the composition of the cylindrical field includes the reflective surface of the cylindrical field and the feed source. The quiet zone is the test area of the cylindrical electromagnetic wave distribution formed by the electromagnetic wave sent by the feed source after being reflected by the reflective surface. In the quiet zone, there is a The linear mechanical scanning device carries the test probe to move on the scanning line. The amplitude and phase test instrument and the stable amplitude and phase cable provide the signal excitation of the cylindrical field feed, receive the complex signal output by the probe and measure the amplitude and phase changes of the sending and receiving signals. The position / attitude measuring device obtains the position and attitude information of the pr...
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The invention discloses a cylindrical surface field static zone amplitude phase detection system. The system includes a linear mechanical scanning device, a test probe, a position / attitude measurementsystem and an amplitude phase test instrument. The linear mechanical scanning device is utilized to carry a test probe to move in a static zone of the cylindrical field, amplitude phase distributionof the static field collected by the probe is obtained by the amplitude phase test instrument, the position / attitude measurement system is utilized to measure the position and the attitude of the probe in the cylindrical field, corrected amplitude phase distribution of the cylindrical field is defined as the ratio of the measurement results of the amplitude phase test instrument at different scanning positions when the test probe is in the cylindrical field static zone to system responses of the probe at the same position and the same attitude under the same signal excitation in the ideal cylindrical field in the same layout, and the amplitude and phase characteristics of the cylinder field static zone are evaluated through utilizing corrected amplitude phase distribution. The system is advantaged in that the need to test complex mechanical scanning systems on equal phase surfaces (cylinders) is avoided, and positioning accuracy of the mechanical scanning system is widened.
Description
technical field [0001] The invention relates to a cylinder field static zone amplitude and phase detection system, which is used for detection and evaluation of electromagnetic field amplitude and phase distribution in the cylindrical field static zone. The result will be one of the important error sources of the cylindrical field test system, and it is of great significance to the error evaluation of the antenna or radar cross section test in the cylindrical field application. Background technique [0002] Antenna and RCS tests often require far-field conditions. The compact field is an indoor test site that satisfies the far-field conditions. It corrects the spherical wave emitted by the feed source to a plane wave within a short distance by means of a precise reflector (such as a rotating paraboloid), and the amplitude and phase distribution of the test quiet zone conforms to the plane wave. feature. In addition, the near-field scanning technology is widely used in the ...
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IPC IPC(8): G01R29/08
Inventor 武建华王正鹏李志平何国瑜
Owner BEIHANG UNIV