antenna tuning

Hi everyone, I'm working on an RF project that requires precise calculations for frequency, wavelength, power, and impedance matching. Does anyone have recommendations for a good RF calculator (online tool, software, or spreadsheet)? Are there any open-source tools that you use for RF...

Hi everyone, I want to adjust the natural frequency of my NFC-circuit in order to optimize the perfomance. Maybe the question is too easy, but I'm new to the usage of a netwerkanalyzer. I want to do the Antenna tuning measurements as described in the application note in the appendix (see chapter...