RFID Implementation

SKU: C-818Duration: 20 Minutes

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Get immediate access to this interactive eLearning course online. Must be used within 30 days, expires 48 hours after launch.

Language:  English

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Course Details

Specs

Training Time: 20 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English

Many decisions must be made when setting up an RFID system. Even after major factors like frequency of operation, reader type, and tag type have been determined, there are still a number of issues that can seriously impact a project's success. These issues deserve consideration both during installation and operation, and include reader antenna location, orientation, and connections, multipath reflection, electromagnetic interference, reader collision, and packaging considerations.

Learning Objectives

At the end of this module, you will be able to:

  • Describe some of the operational factors that affect the read range of RFID systems
  • Describe the effect of antenna orientation on read range
  • List guidelines for reader-to-antenna connections
  • Explain what multipath reflection is
  • List sources of EMI
  • Describe what reader synchronization is
  • Describe how packaging can affect read range

Key Questions

The following key questions are answered in this module:

When selecting an RFID tag reader, isn't it always best to select one with the greatest possible read range?
Not always. If you want the reader to read tags in a certain area and avoid tags farther away, you would want a reader with a limited read range.

How does antenna orientation affect read range?
Read range is maximized when the reader antenna and the tag antenna are parallel.

What is "multipath reflection"?
When part of a transmitted signal is reflected off a metal surface, a second "ghost" signal is created. The two signals can either confuse the reader, or they can cancel each other out.

What is "reader collision"?
When readers are too close together, signals can overlap and interfere with one another. This is called "reader collision."

What can be done about "reader collision"?
One solution is to network the readers together and allow only one reader to operate at a time.

Sample Video Transcript

Below is a transcript of the video sample provided for this module:

Reader antenna orientation has an effect on the read range. Read range is maximized when the reader antenna and the tag antenna are parallel to one another. As the orientation changes from parallel to perpendicular, the strength of the signal returned from the tag is greatly reduced. When the orientation of the tagged products cannot be controlled or changed, the angle of the reader antenna can be changed. Other possible solutions are to use an antenna that is less sensitive to orientation, or use multiple antennas mounted at different angles relative to the read area. Merging multiple scans from antennas at different angles increases the chance of identifying all of the tags present.

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