Author Topic: need help matching chip antenna M620720  (Read 153 times)

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Offline bug13

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  • Country: nz
need help matching chip antenna M620720
« on: November 28, 2017, 03:30:41 PM »
Hi guys

I have done a couple PCB antennas matching, but I have trouble matching this chip antenna M620720 with a PI network to 50ohm:
M620720 https://www.ethertronics.com/wp-content/uploads/2016/11/M620720-ISM-868-915MHz-Ethertronics-Savvi-Ceramic-antenna-datasheet-20161020.pdf

I found an example in this developer guide:
Multitech xDot https://www.multitech.com/documents/publications/manuals/s000645.pdf

In P33, they use two caps? I don't understand this configuration, can someone give me some pointers? Thanks a lot!

PS:
  • I am able to turn the frequency with the minor and major turning, but with no luck matching it 50ohm.
    I only have a USB desktop VNA


« Last Edit: November 28, 2017, 03:33:42 PM by bug13 »
Zhuhua Wu
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