I am new to designing for RF and have a question regarding the design of the matching network for a GPS module I am working on.
The datasheet of the chip antenna ANT161575ST-1202A1 recommends a frequency tuning inductor of 1.2nH
and the application notes recommend a range from 0.5nH to 4.3nH, with a sweet spot seeming to be around 2nH.
However, the TESEO design guide recommends a 5.6nH inductor, and also recommends the two 120pF capacitors, which I have circled in red below. I assume these are for blocking DC signals.
I don't know how to calculate these values myself and so I am at the mercy of two competing datasheet recommendations with no idea what is best. Any help you can give to make a good decision here would be much appreciated.