Antenna Considerations
Because you are tying a plastic insulator to the end of the antenna leads to connect to paracord, should you add extra length to the legs of your dipole? When tuning a multiband HF antenna should you start by adjusting the length of the lowest received frequency band, or the highest received frequency band? Tune the lowest band first (longest element What is the purpose of adding a balun at the feed point of a dipole antenna ? The main purpose of adding a balun (short for balanced-to-unbalanced transformer ) at the feed point of a dipole antenna is to match the balanced antenna to an unbalanced transmission line (like coaxial cable) and reduce unwanted currents. What are the expected input impedances of half wave dipole antennas? A center-fed half-wave dipole is usually close to 70–75 Ω , making it a good match to 50 Ω coax, especially if a 1:1 balun is used to reduce mismatch effects. What is a unun ? A unun is just an unbalanced-to-unbalanced transfor...