Multi-port automatic clamp loss and phase compensation method based on through line

Abstract

The invention proposes a multi-port automatic clamp loss and phase compensation method based on through line. The method comprises: using a time-domain method to obtain the phase displacement; in combination with a radial neural network, fitting the loss of a through line; and removing the influence of the through line clamp between a coaxial reference face and a detected component's reference face to obtain the scattering parameters of the multi-port detected component. The method of the invention is based on the multi-port automatic clamp loss and phase compensation based on a through line. Without the use of various calibration components for embedding removal calculation, the requirement on the calibration components and the complexity in calculation are reduced. Simply designed, the method can perform automatic loss and phase compensation through the multi-port non-coaxial clamp. The S parameter testing precision is increased, and the influence of the clamp on the testing result is removed.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a multi-port automatic fixture loss and phase compensation method based on straight-through lines. Background technique [0002] In recent years, in the fields of Ethernet, 5G mobile communication and satellite navigation, high-speed circuit boards, backplanes, connectors and high-speed digital cables have been widely used. In these fields, differential multi-port forms are mostly used for high-speed signal transmission, and the interfaces are in many cases non-coaxial. Therefore, it is very important for the construction of the system to test the high-precision scattering parameters of such devices. One of the key points of the test is that the instrument can perform automatic error calibration and de-embedding. [0003] At present, among several mainstream electronic test instrument manufacturers, only Keysight (formerly Agilent) software provides automatic port extension func...

AI Technical Summary

Problems solved by technology

[0003] At present, among several mainstream electronic test instrument manufacturers, only Keysight (formerly Agilent) software provides automatic port extension function, but this function still requires coaxial standard parts such as opener or short circuit and cannot be directly applied to non-coaxial devices, and there is no report on extending the method to multi-port devices for de-embedding

However, Rohde & Schwarz of Germany and Anritsu of Japan have not launched an automatic fixture loss and phase compensation de-embedding solution for their vector network analyzers. They can only manually set the loss and phase for simple compensation, which is complicated to operate and has little user experience. High standard

[0004] Existing calibration de-embedding methods, such as SOLT, SOLR and TRL, etc., some methods can only be used on the coaxial port, and some methods are complicated to design and use calibration parts

[0005] Moreover, in the existing solutions, the de-embedding of multi-port devices requires the use of various calibration components such as short circuit, open circuit, load and through, and various standard components need to be completed multiple times during the de-embedding process, which takes a long time and is inefficient

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