US7567154_page_17

US7567154 | page 17 | https://thedailydialectics.com/pdfs/wipow/US7567154/US7567154.pdf

US 7,567,154 B2 7 is very nearly unity. In the region far from the launchers where E-field lines terminate only on the SWTL, the line is essen- tially non-radiating. When uniformly surrounded by a medium such as air or vacuum, the characteristic impedance of the line in this region is nearly the…