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Method for measuring phase of internal calibration network

An internal calibration and phase technology, applied in radio wave measurement systems, instruments, transmitter monitoring and other directions, which can solve the problems of insufficient phase test accuracy and inability to eliminate test errors.

Pending Publication Date: 2021-11-12
CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Manually connect the cables during the test, resulting in insufficient phase test accuracy
[0006] If the single unit to be tested and the incoming cable are tested independently, the test error caused by the inconsistent length and temperature of the test cable outside the box cannot be eliminated

Method used

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  • Method for measuring phase of internal calibration network
  • Method for measuring phase of internal calibration network

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Embodiment Construction

[0015] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0016] Construct the measurement loop, the principle is as follows figure 1 As shown, the control system controls the vector network, and the signal output from port 1 of the vector network is divided into two paths through a 1:2 power splitter: the test link and the calibration link, and the test is performed at the same time, and the data in the vector network is read and automatically recorded .

[0017] The test link sends the signal to the internal calibration network to be tested through the radio frequency cable, and then outputs it to the vector net port 3, and the calibration link connects the signal to the vector net port 2 through the radio frequency cable.

[0018] The cables for the test link and the calibration link outside the incubator are of the same type and have the same length, and the cables inside the box are also o...

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Abstract

The invention discloses a method for measuring the phase of an internal calibration network, and the method comprises the steps: dividing a signal outputted by a vector network port 1 into two paths through a 1:2 power divider, inputting one path into a vector network port 3 through a to-be-measured internal calibration network to form a test link, inputting the other path into a vector network port 2 through a cable to form a calibration link, and enabling the calibration link to serve as a self-compensation link of the test link, adopting cables of the same variety and length, eliminating influences caused by cable differences, collecting data of a calibration link and data of a test link alternately, subtracting the data to obtain the phase of the internal calibration network, adopting a self-calibration method, and obtaining the high-precision internal calibration network temperature phase superior to 0.2 degree, and therefore, the method is not only suitable for the internal calibration network, and the method is also suitable for other single machines or systems requiring high-precision amplitude-phase testing.

Description

technical field [0001] The invention belongs to the technical field of phase measurement, and in particular relates to a difference measurement technology. Background technique [0002] With the development of phased array radar technology, various applications emerge in an endless stream, and the system's requirements for various indicators of the antenna are also constantly improving. In some application scenarios, for example, in order to obtain high-precision imaging quality and higher detection accuracy, it is necessary to test the phase change of the calibration network in the phased array antenna. [0003] During the working process of the phased array antenna, the phase change of the internal calibration network is mainly affected by the temperature of the antenna. As the temperature changes, the phase changes, and a certain temperature corresponds to a certain phase change, which provides an idea for the phase calibration in the actual working process of the antenn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/12H04B17/21G01S7/40
CPCH04B17/12H04B17/21G01S7/4004
Inventor 李锐孙磊孙红兵梁伟龙李建新林幼权
Owner CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST