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RFID Multi Antenna

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Discussion in 'Radio and Wireless' started by dawood, Jul 21, 2016.

  1. Jul 21, 2016 #1
    dawood

    dawood

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    Jul 21, 2016
    Hello guys
    I am working in a project to customize the rang of RFID. I want to produce a product that have a large variety of ranges but I don't want to use a different types of RFID antennas. To do that I will choose a small range antenna and I will multiple it when I ever need to increase the range. The problem that I never use RFID module and I am not sure if there are a suggestible module will support this Idea.
     
  2. Jul 21, 2016 #2
    Sunnysky

    Sunnysky

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    Jul 15, 2016
    Using splitters isolates antennae at a loss in sensitivity.

    Combining antenna with passive filters requires knowledge of antenna impedance, Smith Charts etc.
     
  3. Jul 21, 2016 #3
    dawood

    dawood

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    Jul 21, 2016
    I did not get your Idea clearly
    You are saying that using multiple antenna will cost sensitivity unless I use passive filter???

    Do you have other idea to customize the range of the antenna???
     
  4. Jul 22, 2016 #4
    Sunnysky

    Sunnysky

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    Jul 15, 2016
    do you have a spectral loss budget?
     
  5. Jul 22, 2016 #5
    hevans1944

    hevans1944 Hop - AC8NS

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    Jun 21, 2012
    Hmmm. I think the first step would be to "get smart" about RFID modules before worrying about antennas and range. Who makes the RFID module? Is it active or passive? Over what range of frequencies does it respond when queried? What is the output level of the device interrogating the RFID? What range limits, minimum and maximum, do you expect the RFID and RFID reader to operate over? Will there be objects between the RFID device and the reader? Inside a building or outside? Any reflective or absorbing surfaces nearby? What are you trying to DO?
     
    Arouse1973 likes this.
  6. Jul 22, 2016 #6
    Sunnysky

    Sunnysky

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    1st essential design is create a spectral loss budget. .. This includes Friis losses , Tx power, Rx threshold,BER requirements, frequency, interference sources and levels.
     
  7. Jul 23, 2016 #7
    dawood

    dawood

    4
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    Jul 21, 2016
    thank you for your fast replay
    not yet
    I told you that I know nothing about RFID and I am thinking about the Idea if can be work or not and some hints about the modules that will allow me to extend the range to start read about it.
    for more information about my project
    I will use arduino with the RFID , wifi shield and some other sensors for other purposes. Moreover I need to write php code and create database for the server.

    all that and I have short time to finish so I will be thankful for any help that I can get
     
  8. Jul 23, 2016 #8
    Sunnysky

    Sunnysky

    465
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    Jul 15, 2016
    in a short time if you dont understand how to research yet and learn , copy someones example like a phD thesis online
     
  9. Jul 23, 2016 #9
    dawood

    dawood

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    Jul 21, 2016
    Sorry for wasting ur time
    And thanx for help
     
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