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A method for measuring the reflection coefficient of a tag-coded antenna

A technology of reflection coefficient and measurement method, which is applied in the field of tag-encoded antenna parameter measurement to achieve the effect of multi-parameter information

Active Publication Date: 2022-05-13
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

In an application scenario like this, since the antenna sensor itself is pasted on the building, if you continue to use the VNA as a measurement tool, it will inevitably cause a lot of inconvenience

Method used

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  • A method for measuring the reflection coefficient of a tag-coded antenna
  • A method for measuring the reflection coefficient of a tag-coded antenna
  • A method for measuring the reflection coefficient of a tag-coded antenna

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Embodiment

[0043] 1. Environment Construction

[0044]This application proposes a method for measuring the reflection coefficient of a tag-coded antenna. It uses a wired measurement method and the device under test is a single port. Therefore, it is considered to add a directional coupler to separate the transmitted signal from the reflected signal and complete the measurement of the S11 parameter. . The directional coupler part is connected to the USRP through a coaxial cable, while the USRP part is connected to the computer through an Ethernet cable to realize data transmission. To improve the accuracy of the measurement results, no-load operation should be considered before adding the DUT to reduce inaccurate results due to internal errors in the directional coupler. The block diagram of the specific connection method between each device is as follows figure 1 shown.

[0045] Secondly, the tag-encoded antenna is attached to the building structure. In order to obtain complete inform...

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Abstract

The invention relates to a method for measuring the reflection coefficient of a tag coded antenna. In the field of structural health detection, the structural changes of buildings can be judged and predicted by the parameter changes of the sensors arranged on it. The measurement and collection of traditional sensor parameters mostly use vector network analyzers. The present invention provides a method for measuring the reflection coefficient of tag-encoded antenna devices based on a Universal Software Radio Peripheral (USRP) platform. This method is based on the above-mentioned software and hardware platform, cooperates with devices such as directional couplers, and measures the parameters of the tag-encoded antenna attached to the building through the configuration of the USRP on the software side and the subsequent processing of the data. Compared with the traditional vector network analyzer measurement scheme, this method can increase the flexibility of the experiment, and at the same time, it can grasp more characteristic parameters that affect the health of the building structure, and make a more reasonable analysis of the health of the building structure.

Description

technical field [0001] The invention relates to the field of parameter measurement of a label coding antenna of a high-frequency electronic circuit. technical background [0002] In the traditional antenna design, people generally pay more attention to the performance of the antenna, so more emphasis is placed on the design of the antenna function, and a vector network analyzer is often used in the process of parameter testing. On the one hand, this test can indeed ensure the accuracy of the test results, but on the other hand, due to the relative invariance of its test environment and method, it lacks some flexibility. The measurement algorithm is ported into it. On the other hand, in some more complex test scenarios, utilizing a network analyzer can be a lot of inconvenience. [0003] In addition, due to the advancement of smart sensor technology, it has gradually become a trend to use antenna sensors for SHM (structural health monitoring) and embed them into the actual ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/10
CPCG01R29/10
Inventor 万国春李文钊
Owner TONGJI UNIV
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