@mngrif Impedance matching isnt itself an indication of any sort of issue. The reason it is, indirectly, is it means your antenna's impedance is likely mismatches with the impedance of free-space. Which means it likely wont radiate all that much. This is mostly just due to the fact that near the ground the impedance of the space is closer to 50 ohms even though if you were out in space it would be closer to 400 ohms.