I was designed yagi that has lenght of the driven 0.16186 x 2 m and the boom is 1.5 m. I plan to use hair pin match, but i still confused about how we decided the lenght of hairpin and the looped coaxial ? And when we can change the impedance while we use vwr analyser? I have been using gama match and i measured the impadance while i changing the lenght of the capacitor ( gama match)