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Recent content by Karrar Naji

  1. K

    Coplanar antenna books

    hi everyone if u can help me to find a book talk about coplanar waveguide or coplanar antenna with details about it ? thanks
  2. K

    where i can buy RFID chip?

    Thnaks Deexith Hasan but the websites do not sale the chip , usually they sale the RFID tag or reader . for me i need just the chip
  3. K

    where i can buy RFID chip?

    RajivConfident , am buying this chip for my project , am designing RFID tag antenna and i have chosen Alien higgs 4 and mu center frequency is 915 Mhz . i did not find the chip only in in this website www.atlasrfidstore.com/ thanks
  4. K

    where i can buy RFID chip?

    hi everyone can anyone help me to buy the RFID chip (Alien Higgs 4 ) online ? cuz i can not find any website that can provide me with the chip. thanks
  5. K

    [Moved]antenna substrate ( Teflon PTFE)

    thanks FvM but i did not find PTFE epsilon 2.65 and loss tangent 0.0016 , is that comes with conductor or not ?
  6. K

    [Moved]antenna substrate ( Teflon PTFE)

    hi everyone , I am designing antenna and i want to choose teflon (PTFE) as a substrate epsilon 2.1 , the loss tangent 0.0002 but i don't the thickness and the suppliers for that one so can you help me with that ? also if this substrate has conductor or not? thanks
  7. K

    [Moved]CST Problem with antenna simulations

    hi everyone , I have problem with CST when I simulate my antenna, the CST shows me warning that the accepted power is very small , the gain inaccurate . Can anyone help me please to tell me whats the problem ? thanks
  8. K

    RFID tag antenna design at 915 Mhz for metallic objects

    Hi everyone , Am designing tag antenna for metallic objects and am using CST Software for simulation the antenna . my question is whether if i simulate should I add more layer for simulate as metallic like add another substrate (FR4) and conductance ( copper) in order to work as metallic in...
  9. K

    RFID tag antenna design

    thanks flanello , so at 915 Mhz the impedance is (20.97-193.2j) ohm , right?
  10. K

    RFID tag antenna design

    Hi everyone, I am working on RFID tag design and i want to choose the chip so i have chosen Alien higgs 4 , they mention in the datasheet the parallel capacitance input is equal to 0.89 PF and the resistance parallel input is 1800 K ohm but when i have read some papers they mention the Higgs 4...

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