This page will describe al whole procedure on how the antena was tuned.
https://synzen.com.tw/products/lodestar antenna is used for the Rhino Tracker. This is the tuning process for air.
For GPS antenna tuning a MegiQ VNA-0460 VNA was used. VNA and cable were calibrated with custom calibration kit.
Because one of the component was not in stock at office w tried with 10pF instead of 8.2pF on C2
C13 - 15pF
C3 - 1pF
C2 - 10pF
L4 - DNP
C13 - 15pF
C3 - 1.5pF
C2 - 11pF
L4 - DNP
C13 - 15pF
C3 - 1.5pF
C2 - 6.8pF
L4 - DNP
At this point we saw that we are not getting anywhere.
C13 - 15pF
C2 - 1pF
C3 - 1pF
L4 - 1nF
C13 - 15pF
C2 - 1pF
C3 - 1pF
L4 - 2.2nH
C13 - 15pF
C2 - 1pF
C3 - 2.2pF
L4 - 2.2nH
C13 - 10pF
C2 - 1pF
C3 - 2.2pF
L4 - 2.2nH
C13 - 22pF
C2 - 1pF
C3 - 2.2pF
L4 - 2.2pF
C13 - 10pF
C2 - 1pF
C3 - 3.3pF
L4 - 2.2nH
C13 - 10pF
C2 - 3.3pF
C3 - 3.3pF
L4 - 2.2nH
C13 - 10pF
C2 - 4.7pF
C3 - 3.3pF
L4 - 2.2nH
C13 - 10pF
C2 - 4.7pF
C3 - 4.7pF
L4 - 2.2nH