App note: Using Baluns and RF components for impedance matching

App note from Coilcraft all about Balance to Unbalance or Balun. Link here (PDF) A symmetrical balanced line has two conductors having equal current in opposite (differential) directions. Twisted pair cable and ribbon cable are examples of balanced line cables. An asymmetrical unbalanced (single-ended) line has one conductor connected to ground, such as coaxial cable. […]