In the BiTT technology, an additional larger magnetic flux shunt bridges the ends of the two secondary coils. This provides an easier path for the magnetic
flux to travel than the smaller bridges at the top an bottom o the two secondary coils.. Because of the magnetic orientation
of the two secondary pick up coils , the bridge is functioning a a magnetic diode, reducing back EMF (BEMF) and the resulting opposing Lenz forces
In a similar fashion the magnetic pathways connecting two toroidal coils in a multiple tier EPG (2 spiralled coils) are of unequal sizes or cross section
and serve the same purpose