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TRF7960A EVM Range

Amit Singh4
Prodigy 40 points
Other Parts Discussed in Thread: TRF7960

I am planning a project for outgoing detection. For this project I am looking for a solution which could detect whether right tag is moving out of the door. For this project, I want a solution which could cover the door which is about 2m wide and detects the outgoing tags reliably. 

I spent some time surfing and I shortlisted TRF7960 as initial candidate but I could not find its working range. But I came across a document which stated that range for ISO 15693 covers ranges about 1.5m. So I wanted to know the range for this module and whether  have  selected the right product and if not what could be the right product for my project? And reader might be located in proximity to metals so module must be able to overcome this problem also.

  • 0
    TI__Guru* 91206 points

    Amit - 

    based on your cost budget, and your 2m range requirement - you will be better using either a low frequency RFID system or high power system HF from Feig. The TRF79xxA family of devices are not meant for the range requirements you are indicating and 2m would be on the edge or outside the working distances for ISO15693 anyway.

    3250.Metric LF Read Ranges_Antennas_Voltages.pdf

    and Feig Electronics also makes the high power HF solutions see here that work with our inlays ==> 

    http://www.feig-electronics.com/en/products/obid/product-areas/obid-i-scan-hf/long-range-readers.html

    http://www.feig-electronics.com/uploads/media/new_design_for_gate_antennas_en.pdf

  • 0 in reply to Josh Wyatt
    Prodigy 40 points

    Thank You for the reply Josh.

    I appreciate the solution. 

    I have encountered something yesterday that RFID solution I am trying to implement has to have a directional feature. It means that I want my reader to transmit in only one direction. Because if reader transmits in omni directional fashion, it will read those tags, which it was not supposed to. So to prevent the unwanted reads, I am looking for methods so that antenna will only transmit in one direction.

    Regards

    Amit

  • 0 in reply to Amit Singh4
    TI__Guru* 91206 points

    this is almost impossible with magnetic fields, only thing you could do is put a metal plate behind the antenna to attenuate the field from one side and retune for that or use ferrite rod antenna for "pencil or flashlight" beam type reads. 

    if you are using electric field style RFID, which we do not make tags for, then you would use a linear antenna to get directional, but even this would have some issues, as there is always a main lobe accompanied by side-lobes.  

  • 0 in reply to Josh Wyatt
    Prodigy 40 points

    Thank You Josh.

    I have another query to aso you that for the range i am aiming for, is there any Evaluation MOdule available so that I can try the solution before implementing.

    Regards

    Amit Singh

  • 0 in reply to Amit Singh4
    TI__Guru* 91206 points

    LF is OK? 

    if so, you can get RI-STU-251B module, plus obtain RI-TRP-W9UR or R9UR. You can make your own antenna coil, similar to the RI-ANT-G04E

    0638.LF Antenna Design.pdf

  • 0 in reply to Josh Wyatt
    Prodigy 40 points

    Thanks for the suggestion.

    I really do appreciate it.

    If you could suggest a complete evaluation module, which will include antenna, test tags, antenna basically whole hardware and software also.

    If this solution is available, please suggest.

    Thanks

    Regards

    Amit Singh

  • 0 in reply to Amit Singh4
    TI__Guru* 91206 points

    Amit - 

    those parts i described would be the "kit" you need to put together for LF solution, at that distance.