Hi-Target AH-4236
Setup

Fig. 1: VRTK2 with AH-4236

Fig. 2: AH-4236 antenna
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Fig. 3: Agilex setup with AH-4236 antenna
Test results
Conclusions
Similar or slightly worse performance that the reference.
SNR is a bit lower.
u-blox ANN-MB seems a better option for a low-profile antenna.