GENERAL DESCRIPTION OF ENERGY TRANSFER 
 
       Consider energy, flowing straight and level down the proximity of a transmission line. 
The energy does not know the width of the channel through which it is passing. If the energy 
reaches a point where the dielectric changes (but not the geometry), some of it will continue on 
and some of it will reflect. If the energy reaches a change in the width of the transmission line 
some will reflect and some will continue as well. The energy current will not know whether: 

Energy current does not have directional inertia, so that (a) is equivalent to (b). Energy 
current does have an aspect ratio. If the aspect ratio is forced to change, some of the flowing 
energy will reflect in order to assure that its total aspect ratio remains constant. Crudely, the 
aspect ratio is similar to the ratio of E to H, or the same as the ratio of to µ. The 
aspect ratio of energy current is much like the aspect ratio of space. While the aspect ratio of 
space can change, it fundamental velocity cannot really change. This parameter 
becomes merely our way of conceptualizing time delay when energy resides in a region of space. 
 
         A /B = Aspect Ratio 

Aspect ratio defines the shape of energy entering a given region of space, but not its 
amplitude. Velocity or length define the time during which the properly shaped energy can be 
accommodated by a region of space. Aspect ratio is really a definition of the relative 
compatibility of adjacent regions of space. Does flowing energy current largely travel unimpeded 
through an interface, or does it largely reflect at the interface? Space has quiet zones through 
which energy glides virtually unreflected. There are also noisy zones where energy current 
becomes incoherent, bounces about and splits apart. Noisy zones in space have either rapidly 
changing geometry or rapidly changing impedance ().