On Fri, Jan 17, 2025 at 06:40 AM, ?lvaro Felipe Hern¨¢ndez wrote:
Whenever I have made measurements to antennas I have had very different
results -even calibrating the antenna feed coaxial cable- than placing my
VNA-F with a 10 cm. patch cord directly to the antenna feed.
This happens when you have common mode issues and the outer surface of the coax shield has become part of the antenna. For example - A dipole connect to coax with out a balun will have this issue.
Roger
Roger Need