Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Passive intermodulation outlier quick locating method based on vector network analyzer

A technology of vector network analysis and passive intermodulation, which is applied in the field of rapid positioning of passive intermodulation abnormal points based on vector network analyzers, can solve problems such as loss of function, complex hardware composition, and influence of filter performance on measurement results. Achieve good adaptability, increase product added value, and improve accuracy

Inactive Publication Date: 2014-03-26
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
View PDF2 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. It includes a reference receiving module, a synchronizer module, a main receiving module, a phase detector module and a control module, and the hardware structure is relatively complex; 2. The PIM signal is coupled to the front end of the instrument for phase calculation, and the filter of the PIM tester is not used
The high-power two-tone signal is bound to be coupled into the receiving module, so the built-in filter performance of the module has a greater impact on the measurement results
3. Only the third-order PIM products can be used for positioning. For some systems where only higher-order PIM products fall into the channel, this method is useless
[0005] Another implementation method is to use a PIM test system composed of a network analyzer, a signal source and a test device, but this system has not yet realized the rapid positioning of PIM abnormal points

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Passive intermodulation outlier quick locating method based on vector network analyzer
  • Passive intermodulation outlier quick locating method based on vector network analyzer
  • Passive intermodulation outlier quick locating method based on vector network analyzer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The general principle of passive intermodulation (PIM) test system composed of network analysis is: use one network analyzer as a signal source and receiver (spectrum analyzer), and use one signal source as another signal transmitting unit. The two test signals enter the power amplifier module respectively, and after being amplified, enter the test device for combination to form a 2x43dBm dual-tone signal, which is loaded on the device under test. The reflected PIM signal passes through the filter channel of the test device, and the filtered PIM interference enters the network analyzer for measurement, mainly measuring its amplitude or power. Therefore, the system includes 1 network analyzer, 1 signal source, 2 power amplifiers, 1 set of test equipment and accessories, or use 1 receiver, 1 signal source and 1 control computer to replace the network analyzer to form a measurement system, and The rapid location function of PIM interference abnormal points cannot be realiz...

Embodiment 2

[0059] On the basis of the above-described embodiments, the present invention is further described. A method for quickly locating passive intermodulation abnormal points based on a vector network analyzer of the present invention includes the following steps:

[0060] Step 1: The first signal source of the VNA generates the first signal and the second signal of the single-frequency signal of the test frequency, and the first signal enters the frequency multiplication unit through power division or coupling; the second signal passes through VNA port input to power amplifier;

[0061] Step 2: The second signal source of the VNA generates the third signal and the fourth signal of the single-frequency signal of the test frequency, and the third signal enters the frequency multiplication unit through power division or coupling; the fourth signal passes through VNA port input to power amplifier;

[0062] Step 3: The first signal and the third signal are mixed and filtered by the fr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a passive intermodulation outlier quick locating method based on a vector network analyzer. The vector network analyzer is used as two-path signal sources and a receiver (spectrum analyzer), two paths of testing signals enter a power amplifier module respectively, after amplification, a testing device is connected in to carry out combining, and 2 * 43dBm double-tone signals are formed and are loaded on a tested device. Reflection PIM signals pass through a filtering channel of the testing device, after filtering, PIM interference enters the network analyzer for measuring, and the amplitude and the phase are measured. According to the scheme, the quick locating function on a passive intermodulation outlier of the vector network analyzer can be achieved, the product added value of the current vector network analyzer is increased, locating can be carried out on an abnormal device according to a higher-order PIM product, and better adaptability is achieved on a system in which only a high-order PIM product falls into a receiving belt to form interference, such as a signal satellite communication system.

Description

technical field [0001] The invention belongs to the technical field of fast positioning of passive intermodulation abnormal points, and in particular relates to a method for fast positioning of passive intermodulation abnormal points based on a vector network analyzer. Background technique [0002] In the application of modern communication systems, with the increasing sensitivity of the receiver and the increasing transmission power, the requirements for the linearity of passive devices are also increasing, and the formation of passive intermodulation (PIM) products will affect the system. Interference becomes more prominent. At present, the main methods of system-level PIM detection and troubleshooting are tapping method and segmented elimination method, which are time-consuming and labor-intensive. The mainstream PIM tester manufacturers are developing the positioning function of the abnormal parts of the PIM tester. Although the implementation methods are different, the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04B1/10H04B17/00H04B17/345
Inventor 杨保国王尊峰梁胜利张庆龙马景芳李树彪李明太
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com