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CC-ANTENNA-DK2: Some questions on DK2

GGA
Genius 3985 points
Part Number: CC-ANTENNA-DK2

Hi,

just received the DK2, some impressive new designs!

#1 coin cell: I guess the name is just because of the size, but one has to keep the area clear from a real coin cell? One could think to stack a coin cell just above the antenna design. But where is the feed point & space for the circuit?

All others: the ground plane size will have a certain impact. If one change it, matching has to be adjusted?

#7 169MHz metal-PRO antenna: never seen something like that before. But it could be interesting fpr 434/868/2.4 too - we always have the problem to get out of the metal housings in new designs. I f we could design in the antenna into the housing, this could have advantages. Any hints for designs in these frequencies?

  • 0
    TI__Mastermind 29560 points

    Hi,

    Good to hear that you like the CC-Antenna-DK2 :)

    #1. The idea behind this design was that the electronics would be placed on the top layer within the GND plane area and the coin cell positioned underneath.

    Changing the GND plane will affect the matching since all these antenna designs are monopoles. This is also valid for all types of monopoles even chip, wire, pcb antennas.

    #7 This is a large antenna but the Italian metering market wanted an antenna that had only 6 - 7 dB loss at 169 MHz. Hence, the large size of this antenna. Similar approach can also be used at other frequencies as well.  With this topology, the antenna main GND reference is directly underneath the antenna so this is less sensitive to altering the GND plane size (compared to a standard monopole antenna). Recommend to look at http://www.proant.se/en/home.htm for similar antennas at different frequencies.

    Regards,

       Richard