Method for recognizing synchronous reflection point position in compact field antenna measurement

Abstract

The invention discloses a method for recognizing a synchronous reflection point position in the compact field antenna measurement. The method comprises the steps of building a three-dimensional rectangular coordinate system in a dark chamber of a compact field; determining the position of a compact field feed source in the three-dimensional rectangular coordinate system; determining the position of the compact field reflecting surface according to the position of the compact field feed source and the position of a testing area; building an ellipsoidal surface in the compact field dark chamber by using the position of the compact field feed source and the position of an antenna to be measured, in the testing area as the focuses and the length of the transmission path of the compact field feed source from the reflecting surface to the antenna to be measured, at any position in the testing area, wherein the part in which the ellipsoidal surface is intersected with each surface of the compact field dark chamber and an object in an inner space of the compact field dark chamber is the position of a synchronous reflecting point. With the adoption of the method, the position of the synchronous reflecting point that a reflecting signal and a direct wave signal in a compact field synchronously reaches a receiving antenna.

Description

technical field [0001] The invention relates to a method for identifying the position of a reflection point, in particular to a method for identifying a position of a synchronous reflection point for measurement of a compact field antenna. Background technique [0002] With the development of antenna measurement technology, the requirements for the measurement accuracy of antenna electromagnetic characteristics are getting higher and higher. The compact field can provide the plane wave environment required for antenna measurement within a short distance, and has become a common method for antenna measurement. The layout diagram of the compact field antenna measurement system is as follows: figure 1 As shown in the figure, the compact field feeder emits a spherical wave, irradiates the compact field reflecting surface, and is converted into a plane wave after reflection, and the antenna under test in the test area receives the plane wave. The test area is the area with the ...

AI Technical Summary

Problems solved by technology

However, this processing method cannot eliminate the reflected signal of the transmitted wave of the compact field feed source in the compact field, which is reflected by the reflection point in the compact field and reaches the antenna under test, and the signal transmitted by the compact field feed source after being converted by the reflection surface of the compact field and then reaches the test antenna. The interfering reflected signal with the same time as the direct plane wave signal of the antenna, that is, if the reflected signal is time-synchronized with the direct wave signal, it cannot be eliminated by the existing time-domain gating method

Images