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CC1310: Using a co-linear dipole at the base station.

Andrew Stuart
Prodigy 50 points
Part Number: CC1310

Hi,

We use the CC1310 in the battery operated field units with the compact helical antenna whilst in the base station antenna choice is much more flexible since their are no size/power constrains. We have tried this 5dBi co-linear dipole: https://www.digikey.co.uk/en/products/detail/nearson-inc/SG1019NM-915/7402746 However performance is only slightly better than a stubby monopole. Both this antenna are 50R, so no match is applied, just a dc blocking cap.

We use the standard balun and filter from the differential output of the cc1310 to convert to a single-ended output, but normally a dipole would be driven by a balanced output. Is there a recommended schematic for using dipole antennas with the cc1310?

Do you have any specific recommendation for best performance when there are no size/power constrains? 

Thanks,

Andy

  • +1
    TI__Mastermind 31550 points

    Hi Andy,

    Most dipole antennas will be a "Balanced Sleeve" Dipole or "Coaxial" Dipoles. i.e. they will have an integrated balun to convert the single-ended to the differential element antenna.

     

    There are not to many benefits having a large antenna gain for portable products since regulations normally specify a maximum conducted power level and a maximum antenna gain.

    For example, in Europe, 14.0 dBm conducted output power is the maximum allowed for the majority of the "868 MHz" band with an antenna gain of 2.15 dBi. If the antenna gain is increased to say 4.15 dBi, then the maximum conducted power should not be more than 12.0 dBm.

    Regards,

       Richard