Dear Johan,

It's easy to produce an E (electric) field and It's equally easy to produce

an H

(magnetic) field. However, it is quite difficult to "convince" these two

separate fields

to join and create a Poynting vector

This is indeed a facinating topic.

Would you care to elaborate "Why" it is dificult to get then to combine ?

Is it not enough to get their phases correct ?

(Or is it phases and/or polarisation vectors ?)

...................Zim ........... Vk3GJZ