Greetings Holger!   
      
    LF>> A director leads an orchestra when playing music. Radials are those   
    LF>> "elements" that are excited when radiating RF. The only thing   
    LF>> confusing about this are the molecs who're heating up those radials   
    LF>> because of their activity.   
      
    HG> The exited elements are named radiators or driven elements.   
      
   Yes, in a yagi or dipole.   
      
    HG> The reflector(s) and director(s) are parasitic elements.   
      
   No, they're mirrors and orchestra leaders. I think of your version of   
   reflectors as RF image deflectors and your directors as RF guidence   
   elements. Especially in a yagi antenna. Not so much as in a LPDA, as only   
   some of the elements are excited, while those which are not in use for a   
   radiated RF signal at a frequency in the design limitations of the   
   particular antenna are not.   
      
       Have a day!   
      
            R\%/itt - K5RXT   
      
   --- GoldED+/W32 1.1.5-31012   
   --- D'Bridge 3.99   
    * Origin: HAM Radio, aka Amateur Radio. 804? Over! (1:387/22)