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need help matching chip antenna M620720
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Topic: need help matching chip antenna M620720 (Read 1122 times)
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bug13
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need help matching chip antenna M620720
«
on:
November 28, 2017, 04:30:41 am »
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
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Last Edit: November 28, 2017, 04:33:42 am by bug13
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Zhuhua Wu
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