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Uyalç.1
Uyalç.1
Associate II
April 21, 2020
Solved

I can read up to 50 centimeters. How can I change the reading distance?

  • April 21, 2020
  • 3 replies
  • 1062 views

Hi,

We bought ST25RU3993-EVAL from your company. This evaulation board worked. I installed ST25RU3993 RS. I set Reader Settings,choosed Antenna. I did everything you told in video. You mentioned in your demo video that you can read up to 11 meters.

But i can read up to 50 centimeters. You used A0025 in your video. Is this about or is there something i missed?

This topic has been closed for replies.
Best answer by Cedric Dalban

Hello,

the antenna being used in the video (Poynting Patch A0025) is indeed a long range antenna.

The 13 meters shown in the video cannot be reached with the antenna provided with the ST25RU3993-EVAL

which is a near field antenna and is designed for short ranges.

best regards,

Cedric

3 replies

Cedric Dalban
Cedric DalbanBest answer
ST Employee
April 21, 2020

Hello,

the antenna being used in the video (Poynting Patch A0025) is indeed a long range antenna.

The 13 meters shown in the video cannot be reached with the antenna provided with the ST25RU3993-EVAL

which is a near field antenna and is designed for short ranges.

best regards,

Cedric

Uyalç.1
Uyalç.1Author
Associate II
April 21, 2020

Hello Cedric,

Thanks for answer. I have one more question :)

The distance I want to read 3 meters. Which Antenna Model would you recommend?

Bart Herse
Bart Herse
Visitor II
April 23, 2020

Hi Uyalç.1,

reaching a specific read distance depend on a number of things including the reader output power, environment, tag model, tag orientation, material the tag is mounted on.

Typically a link budget calculation helps you to figure out which antenna gain is required to establish the link and hence which antenna model.

I am guessing, and apologies I am wrong, you would like to run a quick test.

Consider A5020 from Times-7.

If this antenna does not fit your requirements e.g. size, you might browse their portfolio and/or look at Laird or MTI as well finding an antenna with a similar gain.

Cheers,

B

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