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2.45GHz RFID reader

Discussion in 'Electronic Design' started by [email protected], Nov 25, 2004.

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  1. Guest

    Hi, all:
    I'm going to design a 2.45GHz RFID reader. Are there any IC chips
    available? Can anyone give me some informations and suggestions?
    Thanks alot

    X.Y Yang
  2. Jim Thompson

    Jim Thompson Guest

    The readers are provided by the tag manufacturers.

    ...Jim Thompson
  3. Guest

    REASON: Our company will be a tag manufacturer
  4. Ian Stirling

    Ian Stirling Guest

    Well, ask the people who will be making the transmitters what format the
    tags transmit in (there is not only one) and go from there.
  5. ISO18000-4 is the best bet for the format, even though we are working
    on the Palomar protocol also. But RFID is a sensitive area - I doubt
    that you may not get many useful answers from people protecting their
    trade secrets.

  6. Jim Thompson

    Jim Thompson Guest

    And where did the tag _design_ come from ?:)

    ...Jim Thompson
  7. Again... Why?

    You will be among a million other tag and reader manufacturers in a
    well established marketplace.

    If you are having to ask about the availability of chips to to do the
    R.F. side of the reader you are very likely unaware of the challenges
    you face in backsplatter tag energizing and reading.

    I would hire a good R.F. consultant with prior experience in the art.
  8. Jim Thompson

    Jim Thompson Guest

    Read :)-)) between the lines... someone has reverse-engineered a tag
    chip, but forgot they needed to also steal a reader ;-)

    SE Asia has no concern with patents or copyrights).


    ...Jim Thompson
  9. Yeah, and someone ostensibly posting under a Chinese name would likely
    as not carry all those nice trade secrets back to Cathay and next
    year, we'd all be deluged with trillions of RFID tags of Chinese
    manufacture. ;-)
  10. Guest

    Thanks for all your replies, though almost useless. Is the purpose of
    this group to discuss circuit design? You might save your typing by
    ignoring my posts or saying 'Oh, it's secret and I will not tell you'.
    And a question:
    Are all of your chips or circuits invented by yourself and unique in
    the world?
  11. I failed to look at his name. I believe you are correct as to his
    intentions but with all the established players in this market, even
    in Asia, I fail to see how anyone can compete. Selling tags for EAS
    applications is like selling cloth's hangers. It's a penny here, penny
    there commodity.

    Now active tags are a whole different story as you well know. I am
    currently working on a long range (100 meter+) Zigbee protocol design
    to work in a Mesh.
  12. Ian Stirling

    Ian Stirling Guest

    It's a meaningless question.
    There are several RF tag protocols, and lots of special ones.
    You actually do need to find out what the RF tag transmits, in
    order to be able to specify a reciever.
  13. Guest

    I have no time to squarrel here. A chinese idiom is very suitable to
    take advantage of one's seniority to be a rascal
  14. I don't know about all, but many are. We made a passive tag for
    870 MHz with 1kb flash memory and 4 m readout distance last year
    (with 0.5W radiated power, now the regulations allow more), but the
    ICs are not publicly available.
    There may be several protocols, but *the* protocol at 2.45GHz is
    probably going to be ISO 18000-4. It would help, though, if Xiangyu
    specified what protocol he has in mind, ISO or something else. And
    whether it is a passive or active tag. At the time I started the
    2.45GHz design I was not able to find complete RFID IC's
    and mis-used other short-range radio IC's instead. I know that at
    least Philips Semiconductors has been active with the ISO 18000 -
    they may have something publicly available by now.

  15. Another allegedly chinese one is "Man who waits for roast duck to
    fly into mouth must wait very, very long time".

    Please figure out which RFID protocol you are interested in, then
    go through the IC manufacturer's catalogs (perhaps google) to find
    whether there are complete IC solutions available. What's available
    and what's not changes continuosly, and you get the most up-to-date
    answers only by looking yourself. If you can't find a complete
    solution, figure out which radio IC's can implement most of the
    functionality you will need, and design around those. It takes some
    work, but so it has taken for the rest of us, too.

  16. Great! Can you post the Pinyin? ;-)

    Best regards,
    Spehro Pefhany
  17. Duibuqi, wo bu tai hui xie pinyin...
  18. Wo3 gao1 xing4 ji2 le!
  19. Terry Given

    Terry Given Guest

    nihao xiangyu,

    ignore Paul Burridge - most people do.

    Unfortunately a lot of people on this ng like to post drivel. There are
    a lot of very smart people who post gems though, so its worth sifting
    through crap.

  20. Terry Given

    Terry Given Guest

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