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  1. #1
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    dual band dipole antenna (13.5 MHz and 866 MHz) in CST

    hello everyone
    quite new in this field so please have some patience with me

    i have to design a dual band dipole antenna resonating at 13.5 MHz and 866 MHz with port impedance 13-13.5 (real) and 120-130(imaginary) parts with dimensions not greater than 40 by 40 mm2

    i have designed some antennas in CST so familiar with the software.My big dilemma is how do i start this?Am i just choosing a random shape and work on it?or there is other way of planning it before implementing in CST?

    your help is much appreciated

    •   Alt13th September 2017, 12:11

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  2. #2
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    Re: dual band dipole antenna (13.5 MHz and 866 MHz) in CST

    As for the 13.5 MHz antenna, it's simply impossible. A antenna with the given size, either loop or dipole, will have a radiation resistance in the low milliohm range.

    Are you actually designing a 13.5 MHz antenna? Or an inductive near-field coupler?


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    •   Alt13th September 2017, 12:50

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  3. #3
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    Re: dual band dipole antenna (13.5 MHz and 866 MHz) in CST

    it is a RFID tag



    •   Alt13th September 2017, 12:58

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  4. #4
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    Re: dual band dipole antenna (13.5 MHz and 866 MHz) in CST

    For 13.56 MHz, an inductive coupler (e.g. a printed coil with 5 or 10 windings) is the only reasonable way to implement the tag "antenna". For 886 MHz, a shortened dipole is feasible.


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